Photo: elisabeth · CC BY-SA 4.0Dry weather: only 667 mm a year falls on Cormeilles-en-Parisis, less than on 79% of mainland French towns
July afternoons average 26.1°C. Frost is rarer than in 67% of mainland French towns: about 35 nights a year drop below freezing. Wet weather is most frequent in December and least in April. Expect about 35 frosty starts a year, nights when the air falls below freezing.
These are the figures of Météo-France’s Pontoise -Ville station, 12 km north-west.
A year in Cormeilles-en-Parisis at a glance
Each month’s typical high and low in °C, at the Pontoise -Ville station.
What a year in Cormeilles-en-Parisis feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Pontoise -Ville.
About 667 mm of rain a year
December is the wettest month and April the driest. About 18 days a year bring 10 mm or more. 15th wettest of 76 towns of 2,500+ in Val-d'Oise.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Le Bourget
35 frosts and 62 days of 25°C a year
On about 35 nights a year the air drops to 0°C or below, and on about 3 days it stays below freezing all day. About 62 days a year reach 25°C, and 18 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Pontoise -Ville: 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 -Ville
Pontoise -Ville is 12 km north-west of Cormeilles-en-Parisis. Every figure on this page is the station’s, not a measurement in Cormeilles-en-Parisis itself.
| Station (Météo-France number) | Pontoise -Ville (95500003) |
| Distance from the town | 12 km north-west |
| Station altitude | 50 m |
| Town altitude (its center) | 70 m |
| Period | 1991–2020 |
| Sunshine measured at | Le Bourget, 17 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 Cormeilles-en-Parisis 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 Val-d'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 |
|---|---|---|---|---|
| Cormeilles-en-Parisis | Pontoise -Ville | 26.1°C | 2.7°C | 667 mm |
| La Frette-sur-Seine 1.7 km | same station | 26.1°C about the same | 2.7°C about the same | 667 mm |
| Montigny-lès-Cormeilles 3.2 km | same station | 26.1°C about the same | 2.7°C about the same | 667 mm |
| Sartrouville 3.3 km | Bagatelle | 26.4°C about the same | 2.7°C about the same | 639 mm |
| Franconville 3.4 km | same station | 26.1°C about the same | 2.7°C about the same | 667 mm |
| Argenteuil 3.8 km | Bagatelle | 26.4°C about the same | 2.7°C about the same | 639 mm |
| Maisons-Laffitte 4.1 km | Bagatelle | 26.4°C about the same | 2.7°C about the same | 639 mm |
Cormeilles-en-Parisis weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Pontoise -Ville station; sunshine at Le Bourget.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.8°C | 2.7°C | 5.3°C | 58 mm | 57 |
| February | 9.1°C | 2.6°C | 5.8°C | 52 mm | 74 |
| March | 13.1°C | 4.5°C | 8.8°C | 49 mm | 129 |
| April | 16.9°C | 6.4°C | 11.7°C | 45 mm | 171 |
| May | 20.5°C | 9.8°C | 15.2°C | 62 mm | 189 |
| June | 23.8°C | 13.0°C | 18.4°C | 54 mm | 203 |
| July | 26.1°C | 14.9°C | 20.5°C | 49 mm | 213 |
| August | 26.2°C | 14.7°C | 20.4°C | 53 mm | 206 |
| September | 22.2°C | 11.7°C | 16.9°C | 46 mm | 162 |
| October | 17.0°C | 9.1°C | 13.0°C | 64 mm | 111 |
| November | 11.5°C | 5.6°C | 8.5°C | 59 mm | 64 |
| December | 8.2°C | 3.3°C | 5.7°C | 75 mm | 54 |
| Year | 16.9°C | 8.2°C | 12.5°C | 667 mm | 1,634 |
Where Cormeilles-en-Parisis’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Pontoise -Ville, 12 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, Le Bourget, 17 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 Val-d'Oise.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Cormeilles-en-Parisis’s climate
How warm does Cormeilles-en-Parisis get in summer?
August is the warmest month, with average highs of 26.2°C. About 62 days a year reach 25°C, more than 53% of mainland French towns, and about 18 reach 30°C.
How cold does Cormeilles-en-Parisis get in winter?
February nights average 2.6°C. The air drops to 0°C or below on about 35 nights a year, and about 3 days a year stay below freezing all day.
How much rain does Cormeilles-en-Parisis get?
About 667 mm a year, less than 79% of mainland French towns. December is the wettest month (75 mm) and April the driest (45 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Le Bourget (17 km away), averages 1,634 hours of sunshine a year.
Are these figures for Cormeilles-en-Parisis itself?
No: they are the normals of the Météo-France station matched to Cormeilles-en-Parisis, Pontoise -Ville, 12 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 -VILLE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Cormeilles-en-Parisis →
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.