Environment and flood checks for Isle of Man property
Climate context and flood due diligence answer different questions. This page uses the approved environment feeds from the unified R2 importer where they genuinely cover the island, and says where they do not.
The official layer shows indicative river areas with a 1% annual chance and tidal areas with a 0.5% annual chance. It is not property-specific and the publisher says it is not a substitute for professional assessment. Open the official Manx flood map service →
Rights gate: jersey-guernsey-iom-property-enrichment is blocked-source-by-source-rights-review. No map geometry, address intersection or property risk score is copied here because no published reuse licence has been approved.
Typical conditions at Ronaldsway
These are 1991–2020 monthly normals calculated from quality-accepted daily observations at NOAA station UKE00108854, Ronaldsway. The source record runs from 19591231 to 20260731.
| Month | Average high | Average low | Precipitation |
|---|---|---|---|
| Jan | 8.5°C | 4.1°C | 82.5 mm |
| Feb | 8.4°C | 3.8°C | 65.5 mm |
| Mar | 9.5°C | 4.5°C | 62.5 mm |
| Apr | 11.6°C | 5.8°C | 55.0 mm |
| May | 14.4°C | 8.1°C | 54.6 mm |
| Jun | 16.6°C | 10.6°C | 62.4 mm |
| Jul | 18.2°C | 12.5°C | 59.4 mm |
| Aug | 18.1°C | 12.7°C | 67.1 mm |
| Sep | 16.5°C | 11.4°C | 70.5 mm |
| Oct | 13.8°C | 9.2°C | 102.0 mm |
| Nov | 11.1°C | 6.6°C | 105.2 mm |
| Dec | 9.3°C | 4.7°C | 94.8 mm |
What the evidence supports
Evidence found
Daily temperature and precipitation observations for Ronaldsway, summarised as 1991-2020 monthly normals.
Source coverage
One land station at Ronaldsway. It is island context, not a reading for every town or property.
What this means
Useful for understanding the island climate that a buyer or renter will generally experience.
What this does not mean
Not a forecast, drainage survey, flood-zone assessment, insurance opinion or property-specific risk score.
Imported flood feeds checked and excluded
Both Environment Agency feeds completed successfully in R2. Their geography is England and Wales, not the Isle of Man, so completion is recorded as provenance rather than presented as Manx evidence.
| Importer feed | State | Snapshot | Coverage | Publication decision |
|---|---|---|---|---|
ea-flood-monitoring-stations | complete | 2026-08-24 | England and Wales; not the Isle of Man | Not applicable to Isle of Man property research |
ea-current-floods | complete | 2026-08-25 | England and Wales; not the Isle of Man | Not applicable to Isle of Man property research |
Provenance and licence
| Dataset | Publisher | Importer snapshot | Station rows used | Licence |
|---|---|---|---|---|
| Global Historical Climatology Network daily (GHCNd) | NOAA National Centers for Environmental Information | noaa-ghcn-daily 20260812 (complete) | 72,143 accepted; 801 quality-flagged rows excluded | US federal open data |
Projection generated 2026-08-25T06:56:32.318Z. Station source SHA-256: e43a0ffcc12d624c960197e15d78bbff71b3d3a7977fe5458e8af338adf7efd7. This is environmental context, not legal, surveying, insurance or safety advice.