Less rain falls on Arpajon than on 90% of mainland French towns: 629 mm a year
January nights here settle around 1.7°C. Temperatures cover 25°C across the year, low to high. By warm days alone, it ranks cooler than 60% of mainland French towns. Waterproofs come out on about 110 days a year, each with 1 mm of rain or more.
Figures from Météo-France’s Brétigny station, 6.1 km east.
A year in Arpajon at a glance
Each month’s typical high and low in °C, at the Brétigny station.
What a year in Arpajon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Brétigny.
About 629 mm of rain a year
December is the wettest month and April the driest. About 16 days a year bring 10 mm or more. 40th wettest of 96 towns of 2,500+ in Essonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Orly
44 frosts and 56 days of 25°C a year
On about 44 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 56 days a year reach 25°C, and 14 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Brétigny: 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 Brétigny
Brétigny is 6.1 km east of Arpajon. Every figure on this page is the station’s, not a measurement in Arpajon itself.
| Station (Météo-France number) | Brétigny (91103001) |
| Distance from the town | 6.1 km east |
| Station altitude | 78 m |
| Town altitude (its center) | 56 m |
| Period | 1991–2020 |
| Sunshine measured at | Orly, 18 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 Arpajon 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 Essonne.
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 |
|---|---|---|---|---|
| Arpajon | Brétigny | 26.0°C | 1.7°C | 629 mm |
| La Norville 1.1 km | same station | 26.0°C about the same | 1.7°C about the same | 629 mm |
| Égly 1.4 km | Fontenay-lès-B. | 26.1°C about the same | 1.5°C about the same | 696 mm |
| Saint-Germain-lès-Arpajon 1.7 km | same station | 26.0°C about the same | 1.7°C about the same | 629 mm |
| Ollainville 1.7 km | Fontenay-lès-B. | 26.1°C about the same | 1.5°C about the same | 696 mm |
| Leuville-sur-Orge 3.4 km | same station | 26.0°C about the same | 1.7°C about the same | 629 mm |
| Bruyères-le-Châtel 4.3 km | Fontenay-lès-B. | 26.1°C about the same | 1.5°C about the same | 696 mm |
Arpajon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Brétigny station; sunshine at Orly.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.2°C | 1.7°C | 4.5°C | 48 mm | 53 |
| February | 8.5°C | 1.5°C | 5.0°C | 45 mm | 85 |
| March | 12.6°C | 3.6°C | 8.1°C | 45 mm | 153 |
| April | 16.2°C | 5.7°C | 10.9°C | 45 mm | 203 |
| May | 19.8°C | 9.2°C | 14.5°C | 61 mm | 217 |
| June | 23.4°C | 12.5°C | 17.9°C | 56 mm | 224 |
| July | 26.0°C | 14.4°C | 20.2°C | 53 mm | 247 |
| August | 25.9°C | 14.1°C | 20.0°C | 58 mm | 221 |
| September | 21.8°C | 11.0°C | 16.4°C | 49 mm | 186 |
| October | 16.6°C | 8.2°C | 12.4°C | 53 mm | 117 |
| November | 10.9°C | 4.5°C | 7.7°C | 55 mm | 62 |
| December | 7.6°C | 2.2°C | 4.9°C | 63 mm | 64 |
| Year | 16.4°C | 7.4°C | 11.9°C | 629 mm | 1,831 |
Where Arpajon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Brétigny, 6.1 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, Orly, 18 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 Essonne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Arpajon’s climate
How warm does Arpajon get in summer?
July is the warmest month, with average highs of 26.0°C. About 56 days a year reach 25°C, fewer than 60% of mainland French towns, and about 14 reach 30°C.
How cold does Arpajon get in winter?
February nights average 1.5°C. The air drops to 0°C or below on about 44 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Arpajon get?
About 629 mm a year, less than 90% of mainland French towns. December is the wettest month (63 mm) and April the driest (45 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Orly (18 km away), averages 1,831 hours of sunshine a year.
Are these figures for Arpajon itself?
No: they are the normals of the Météo-France station matched to Arpajon, Brétigny, 6.1 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 BRETIGNY_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Arpajon →
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.