Why the right platform matters — and why it is not obvious
When someone searches for a "construction weather app", they are not all looking for the same thing. A site foreman deciding whether to pour concrete at 6am needs an immediate, trade-specific go/no-go answer. A project manager facing a programme delay needs a contractual early warning notice. A QS building a delay claim needs ten years of historical data benchmarked against contract thresholds. A safety manager on a large civil site needs lightning detection and instant SMS alerts to the crew.
These are four genuinely different problems. The platforms that dominate search results have been designed to solve one or two of them well. Choosing the wrong one is not just a usability issue — it is a risk management issue if the tool you are using does not produce outputs that hold up in a formal claims process.
This guide covers four platforms that frequently come up in the same conversation: EHAB WeatherWise, Perry Weather, JobSite Weather, and Construction Weather. It is written from the perspective of a contractor on a commercial project under a standard form contract — NEC, JCT, FIDIC, AS 4000 or NZS 3910.
The four platforms at a glance
EHAB WeatherWise
EHAB is an enterprise platform designed for large contractors and construction programmes. It monitors live and forecast weather against custom activity thresholds and sends real-time alerts via SMS, email or WhatsApp when conditions are approaching or have breached the set limit. It is designed for the operational safety and programme management side of weather risk — preventing unplanned downtime by alerting the site team before conditions deteriorate.
Strong points
- Real-time and forecast threshold monitoring with push notifications
- Multi-channel alerts — SMS, email, WhatsApp
- Custom activity thresholds per project or operation
- Enterprise integrations and multi-site dashboards
- Strong operational safety use case for large programmes
Less suited to
- Generating contractual time-extension evidence benchmarked against historical norms
- Producing formal early warning notices structured to NEC/JCT/FIDIC requirements
- Tender-stage weather allowance pricing
- Self-serve access — enterprise pricing and onboarding
- Historical data retrieval for past project months
Perry Weather
Perry Weather is a jobsite safety platform centred on on-site hardware — weather stations installed on the physical site that provide real-time local measurements. Its primary strength is lightning detection and wind monitoring for site safety, with automated alerts to halt operations when conditions become dangerous. It is widely used in the US market, particularly on large civil and infrastructure projects where lightning risk is a live safety concern.
Strong points
- On-site hardware provides hyperlocal real-time measurements
- Lightning detection with safe/unsafe site status
- Wet-bulb globe temperature (WBGT) and heat stress monitoring
- Strong for US market field safety compliance
- Wind monitoring tied to physical site conditions
Less suited to
- Historical benchmarking for delay claims where a pre-project baseline is needed
- Tender-stage weather risk pricing
- Generating draft early warning notices for NEC/JCT/FIDIC contracts
- Sites outside the US where lightning is not the primary risk driver
JobSite Weather
JobSite Weather advertises a seven-day forecast and an eight-hour workability window for trade-focused field decisions. That makes it a field-first option for a tradesperson or small crew deciding whether near-term conditions suit today's work. Construction Weather instead presents operation planning over 14 days and connects that planning with historical analysis, notice drafting and time-extension evidence workflows for project teams. JobSite Weather product site (reviewed 28 August 2026). The provider site was not consistently accessible during our review, so verify the current feature window and pricing directly before purchase.
Market maturity note: JobSite Weather also appears to be a new Android product. Its Google Play listing was observed in late August 2026 showing a July 2026-era release and the “10+ downloads” install band. That is an early distribution snapshot, not a measure of product quality, capability or future adoption; Play Store bands can change at any time.
Strong points
- Clean mobile-first interface designed for field crews
- Quick trade-specific workability ratings
- Low barrier to adoption for tradespeople and small contractors
- Field-oriented simplicity — minimal setup
Less suited to
- Contractual documentation — time-extension evidence and early warning notice generation were not found in the public material reviewed
- Historical data retrieval or delay-claim benchmarking was not found in the public material reviewed
- A tender-stage weather allowance tool was not found in the public material reviewed
- Projects under standard form contracts where formal notice obligations apply
- Fortnight and project-lifecycle planning; its advertised emphasis is the seven-day forecast and eight-hour workability window
Construction Weather
Construction Weather is designed around the full project lifecycle — from pricing weather risk at tender through to daily site planning, contractual early warning notices and time-extension evidence for delay claims. It is used by site managers for daily trade advisory decisions, by project managers for programme protection, and by commercial teams and QSs for claim preparation. It uses gridded meteorological data — not on-site hardware — so outputs can support both daily operational decisions and contractual review, subject to the contract and appropriate expert advice.
Strong points
- Daily operational advisories across 29 construction trades
- 14-day outlook with hourly breakdown for amber and red days
- Operations Forecast mobile app, rain radar and multi-site monitoring
- Generates contractual early warning notice drafts from forecast data
- Time-extension evidence generator benchmarks project months against 5–10 year historical data
- Tender planning tool calculates average unsuitable days by operation and month
- Gridded meteorological data with a reproducible historical methodology, suitable as supporting evidence subject to contract and expert review
- Aligned to NEC3, NEC4, JCT, FIDIC, AS 4000 and NZS 3910
- No hardware, no installation — works for any site worldwide from day one
- Free during open beta
Less suited to
- Real-time push safety alerts — not designed as a lightning or gust alarm system
- Enterprise SMS alert broadcasting and emergency notification
- Projects where the primary need is on-site hardware with physical station data
Side-by-side comparison
The table below compares the four platforms across the features most relevant to contractors on commercial projects.
| Feature | EHAB WeatherWise | Perry Weather | JobSite Weather | Construction Weather |
|---|---|---|---|---|
| Daily trade-specific advisories | ◑ Threshold alerts | ◑ Safety focus | ✓ Field ratings | ✓ 29 trades, G/A/R |
| 14-day planning outlook | ✓ | ◑ | ◑ Advertised 7-day forecast | ✓ With hourly breakdown |
| Real-time push alerts (SMS/email) | ✓ Core feature | ✓ Core feature | ✗ | ◑ In-app alerts |
| On-site weather hardware | ✗ | ✓ Core feature | ✗ | ✗ Gridded data instead |
| Lightning detection | ✗ | ✓ Core feature | ✗ | ✗ |
| Contractual early warning notices | ✗ | ✗ | ✗ | ✓ Editable Word drafts |
| time-extension evidence generator | ✗ | ✗ | ✗ | ✓ vs 5–10yr benchmark |
| Historical weather data retrieval | ✗ | ✗ | ✗ | ✓ Any date, any location |
| Tender-stage weather allowance tool | ✗ | ✗ | ✗ | ✓ 10yr average by trade |
| NEC / JCT / FIDIC alignment | ◑ Partial | ✗ | ✗ | ✓ Built around standard forms |
| Documented meteorological data source | ✓ | ✗ On-site sensor | ◑ | ✓ National agency gridded data |
| No hardware installation required | ✓ | ✗ | ✓ | ✓ |
| Works on mobile without app download | ◑ | ◑ | ✓ Native app | ✓ Web app, add to home screen |
| Self-serve access / free tier | ✗ Enterprise only | ✗ Requires hardware purchase | ◑ Check current offer | ✓ Free in open beta |
✓ Supported ◑ Partial, advertised, or requires verification ✗ Not found in the public material reviewed. Sources reviewed 28 August 2026: JobSite Weather, its Google Play listing, provider documentation for EHAB and Perry Weather, and Construction Weather's own product pages. Features, prices and Play Store install bands may change; absence from public material is not proof a feature is unavailable.
The sensor vs gridded data question
One question when evaluating construction weather platforms is whether on-site hardware or gridded meteorological data better matches the decision and the contract.
For real-time operational safety — deciding whether to halt a crane lift because of a gust reading right now — on-site hardware has genuine value. The measurement is physically at the fence line. Perry Weather's model is built for this use case and it does it well.
For contractual records, either source can require scrutiny. An on-site sensor may need calibration, maintenance and siting records. Gridded data is independent of project hardware and offers a historical baseline, but its resolution can miss local conditions. The contract, evidence rules and expert advice determine the appropriate source; neither source guarantees entitlement or admissibility.
There is also a historical baseline question. Some contract tests compare experienced weather with a historical reference. A sensor installed at project commencement has no pre-project history, while gridded datasets can provide a long baseline. The precise comparison and evidence required depend on the contract.
Which platform fits your situation
Three questions determine the right platform for a given project and role.
My primary need is real-time safety alerts — halt the crew when conditions become dangerous
You need a platform with live threshold monitoring and push notifications. If lightning is a serious risk, physical hardware is worth considering.
EHAB or Perry WeatherMy primary need is a fast daily go/no-go for field crews on a smaller project
A lightweight mobile-first field app is the right fit — minimal setup, fast access, trade workability ratings.
JobSite WeatherMy primary need is to plan the week's work, avoid weather disruption and keep the programme on track
You need a 14-day trade-specific planning tool, with hourly breakdowns for amber days and a live site conditions check. Used by site managers and project managers on commercial projects.
Construction WeatherMy primary need is to document weather delays and build an time-extension claim under NEC, JCT or FIDIC
You need a documented, reproducible data source, an appropriate historical benchmark, a contractual framing tool and timely notice records. The contract, evidence rules and expert advice determine what is appropriate; no software output guarantees entitlement or admissibility.
Construction WeatherI am pricing weather risk into a tender and need to know what allowance to include
You need a historical analysis tool that calculates average unsuitable days by trade operation and project month at the specific site location.
Construction WeatherI need both field safety alerts and contractual documentation on the same project
These are genuinely different tools for different users. Consider running both — a field safety platform for the site supervisor and a contractual workflow platform for the project office.
EHAB + Construction WeatherThe key distinction
The construction weather software market looks like it is selling one thing. It is actually selling four different things to four different users at four different moments in the project.
EHAB and Perry Weather emphasise operational monitoring and safety. JobSite Weather advertises a seven-day forecast and eight-hour workability window for immediate field decisions. Construction Weather emphasises 14-day operation planning plus connected tender, notice and historical evidence workflows. These are different best-fit audiences, not an independent ranking.
The contractor who has lost a weather claim because the records were not contemporaneous, the notices were not issued in time, or the data source was challenged in adjudication — that contractor needed a different tool to the one they were using. Construction Weather is designed specifically to close those gaps, from the first day on site to the final account.
Frequently asked questions
Is Construction Weather better than EHAB WeatherWise?
EHAB WeatherWise and Construction Weather overlap in operational planning but have different centres of gravity. EHAB is an enterprise alert platform that monitors live and forecast weather against custom activity thresholds and sends real-time alerts by SMS, email and WhatsApp. Construction Weather provides forecast-based operational advisories across 29 construction trades, an Operations Forecast mobile app, rain radar and multi-site monitoring, then connects those tools to tender planning, contractual early-warning drafts and time-extension evidence.
For contractors who need immediate safety broadcasts, EHAB may be the stronger fit. For teams that need daily forecast-based planning connected to the project record from tender through claim, Construction Weather is designed for that lifecycle. Some project teams may use both.
Does Construction Weather work as a Perry Weather alternative?
It depends on what you need Perry Weather for. Perry Weather is centred on on-site hardware — physical weather stations with real-time local measurements, lightning detection and WBGT heat stress monitoring, primarily for US market field safety compliance. Construction Weather does not include on-site hardware or lightning detection. If your primary need is real-time safety monitoring with physical stations, Perry Weather is the better fit.
If your primary need is trade planning plus early-warning, historical evidence and tender workflows, Construction Weather explicitly offers those capabilities. Perry Weather's public positioning reviewed on 28 August 2026 instead emphasised field safety and hardware; verify its current scope directly.
Does Construction Weather work as a JobSite Weather alternative?
They fit different planning horizons. JobSite Weather advertises a seven-day forecast and an eight-hour workability window, which may suit a tradesperson or small crew making an immediate field decision. Construction Weather provides operation advisories over 14 days and connects them with tender planning, editable notice drafts and historical time-extension evidence workflows, which may better suit site, project and commercial teams.
Construction Weather's current open beta is free with no fixed end date. Its future Pro price is indicative at $25/month or $250/year, subject to confirmation, and the 14-day forecast is planned to remain free. We could not reliably verify JobSite Weather's current price during the 28 August 2026 review; check the provider's current offer rather than relying on this comparison.
Which construction weather platform is best for time-extension claims and contractual delay documentation?
Construction Weather explicitly offers time-extension evidence preparation, 5–10 year historical benchmarking and editable early-warning notice drafts. These outputs can support project review, but do not establish contractual entitlement, guarantee admissibility or replace programme, legal or meteorological expertise.
We did not find equivalent EOT generation claims in the third-party public material reviewed on 28 August 2026. That is a limited source review, not a categorical statement that another provider cannot offer the capability.
How should on-site sensor and gridded data be evaluated for a weather delay claim?
Both have strengths and limitations. Sensor evidence can represent immediate site conditions but may require calibration, maintenance and siting records. Gridded data provides an independent historical baseline but can smooth over microclimates. Follow the contract's evidence requirements and obtain appropriate expert advice for a material claim.
Can Construction Weather handle daily site planning as well as time-extension claims?
Yes. Construction Weather covers the full project lifecycle. For daily site planning, it provides trade-specific green, amber and red advisories for 29 construction trades — including concreting, groundworks, roofing, painting, crane operations and plant — with a 14-day outlook and hourly breakdown on amber and red days. Site managers can use the Operations Forecast mobile app, rain radar and multi-site monitoring to support daily planning.
The same platform generates editable early warning notice drafts, prepares time-extension evidence benchmarked against historical norms, and includes a tender planning tool for pricing weather risk into bids. These are Construction Weather's stated lifecycle advantages; compare current provider documentation before deciding.