Rainfall in Chavençon trails that of 86% of mainland French towns: 636 mm a year
The coldest hours of a January night bottom out at 1.6°C on average. From frosty January to warm July, readings climb 24°C. Warm afternoons come less often than in 76% of mainland French towns. An umbrella earns its place on about 113 days a year with 1 mm of rain or more.
Figures from Météo-France’s Pontoise - Aéro station, 11 km south.
A year in Chavençon at a glance
Each month’s typical high and low in °C, at the Pontoise - Aéro station.
What a year in Chavençon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Pontoise - Aéro.
About 636 mm of rain a year
December is the wettest month and April the driest. About 17 days a year bring 10 mm or more. 46th wettest of 59 towns of 2,500+ in Oise.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Beauvais-Tillé
48 frosts and 44 days of 25°C a year
On about 48 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 44 days a year reach 25°C, and 10 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Pontoise - Aéro: a frost is a night of 0°C or below, a summer day (jour d’été) 25°C or more, a hot day (forte chaleur) 30°C or more.
The Météo-France station at Pontoise - Aéro
Pontoise - Aéro is 11 km south of Chavençon. Every figure on this page is the station’s, not a measurement in Chavençon itself.
| Station (Météo-France number) | Pontoise - Aéro (95078001) |
| Distance from the town | 11 km south |
| Station altitude | 87 m |
| Town altitude (its center) | 142 m |
| Period | 1991–2020 |
| Sunshine measured at | Beauvais-Tillé, 30 km away |
TownRatings matches each commune to one station with at least 24 years of temperature and rain records: the nearest, counting every 100 m of height difference as 10 km, never across the sea.
How Chavençon compares
Against the 4,385 towns of 2,500 or more in mainland France, each read from its own matched station. The dots are the other towns of 2,500+ in Oise.
Nearby towns’ climate
The nearest towns of 2,500+ within 29 km. Where a neighbor uses the same station its figures are the same: the differences you’d feel over a few kilometers aren’t in the normals.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Chavençon | Pontoise - Aéro | 24.9°C | 1.6°C | 636 mm |
| Marines 4.8 km | same station | 24.9°C about the same | 1.6°C about the same | 636 mm |
| Méru 11 km | same station | 24.9°C about the same | 1.6°C about the same | 636 mm |
| Chaumont-en-Vexin 12 km | Jaméricourt | 25.1°C about the same | 1.5°C about the same | 696 mm |
| Andeville 15 km | Jaméricourt | 25.1°C about the same | 1.5°C about the same | 696 mm |
| Osny 15 km | Pontoise -Ville | 26.1°C 1.2°C warmer | 2.7°C 1.1°C milder | 667 mm |
| Magny-en-Vexin 15 km | same station | 24.9°C about the same | 1.6°C about the same | 636 mm |
Chavençon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Pontoise - Aéro station; sunshine at Beauvais-Tillé.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.0°C | 1.6°C | 4.3°C | 54 mm | 60 |
| February | 8.2°C | 1.4°C | 4.8°C | 46 mm | 79 |
| March | 12.0°C | 3.2°C | 7.6°C | 47 mm | 127 |
| April | 15.6°C | 4.8°C | 10.2°C | 44 mm | 179 |
| May | 19.0°C | 8.2°C | 13.6°C | 60 mm | 203 |
| June | 22.3°C | 11.0°C | 16.7°C | 50 mm | 209 |
| July | 24.9°C | 12.9°C | 18.9°C | 52 mm | 220 |
| August | 24.9°C | 12.8°C | 18.8°C | 55 mm | 208 |
| September | 21.0°C | 10.0°C | 15.5°C | 47 mm | 164 |
| October | 16.0°C | 7.7°C | 11.9°C | 58 mm | 112 |
| November | 10.7°C | 4.4°C | 7.5°C | 55 mm | 68 |
| December | 7.4°C | 2.1°C | 4.7°C | 68 mm | 55 |
| Year | 15.8°C | 6.7°C | 11.2°C | 636 mm | 1,682 |
Where Chavençon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Pontoise - Aéro, 11 km away: statistics for 1991–2020.
- Which station: among stations with at least 24 of the 30 years of temperature and rain, the nearest to the commune’s population-weighted center, counting each 100 m of height difference as 10 km; mainland towns use mainland stations and each overseas département its own.
- Altitudes: the town’s from IGN’s RGE ALTI® at its population-weighted center; the station’s from Météo-France.
- Sunshine: the nearest station with at least 10 years of sunshine records, Beauvais-Tillé, 30 km away.
- Comparisons: every town of 2,500 or more in mainland France, read the same way; the dots are the towns of 2,500+ in Oise.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Chavençon’s climate
How warm does Chavençon get in summer?
July is the warmest month, with average highs of 24.9°C. About 44 days a year reach 25°C, fewer than 76% of mainland French towns, and about 10 reach 30°C.
How cold does Chavençon get in winter?
February nights average 1.4°C. The air drops to 0°C or below on about 48 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Chavençon get?
About 636 mm a year, less than 86% of mainland French towns. December is the wettest month (68 mm) and April the driest (44 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Beauvais-Tillé (30 km away), averages 1,682 hours of sunshine a year.
Are these figures for Chavençon itself?
No: they are the normals of the Météo-France station matched to Chavençon, Pontoise - Aéro, 11 km away. France publishes its climate normals by station, not by commune; a valley, a hill or the sea can make a difference over a few kilometers.
Where do these figures come from?
Météo-France’s fiches climatologiques: 30-year averages (1991–2020) for each of its long-running stations, published as open data since 2024. They are normals, not a forecast.
Source: Météo-France, fiches climatologiques, 1991–2020 statistics (station PONTOISE - AERO, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Chavençon →
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.