Less rain falls on Viry-Châtillon than on 91% of mainland French towns: 622 mm a year
Météo-France’s Orly station, 5.6 km north: a typical year brings 622 mm of rain, with July afternoons around 25.8°C and January nights around 2.1°C. No month is much wetter than another: May, the wettest, gets little more than February, the driest. Only about 54 days a year reach 25°C, fewer than in 63% of mainland French towns.
A year in Viry-Châtillon at a glance
Each month’s typical high and low in °C, at the Orly station.
What a year in Viry-Châtillon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Orly.
About 622 mm of rain a year
May is the wettest month and February the driest. About 15 days a year bring 10 mm or more. 71st wettest of 96 towns of 2,500+ in Essonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Orly
36 frosts and 54 days of 25°C a year
On about 36 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 54 days a year reach 25°C, and 13 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Orly: 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 Orly
Orly is 5.6 km north of Viry-Châtillon. Every figure on this page is the station’s, not a measurement in Viry-Châtillon itself.
| Station (Météo-France number) | Orly (91027002) |
| Distance from the town | 5.6 km north |
| Station altitude | 86 m |
| Town altitude (its center) | 60 m |
| Period | 1991–2020 |
| Nearest station of any kind | 4.2 km |
| Sunshine measured at | the same station |
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 Viry-Châtillon 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 |
|---|---|---|---|---|
| Viry-Châtillon | Orly | 25.8°C | 2.1°C | 622 mm |
| Morsang-sur-Orge 2 km | Brétigny | 26.0°C about the same | 1.7°C about the same | 629 mm |
| Savigny-sur-Orge 2.1 km | same station | 25.8°C about the same | 2.1°C about the same | 622 mm |
| Grigny 2.1 km | same station | 25.8°C about the same | 2.1°C about the same | 622 mm |
| Juvisy-sur-Orge 2.2 km | same station | 25.8°C about the same | 2.1°C about the same | 622 mm |
| Villemoisson-sur-Orge 3.1 km | Brétigny | 26.0°C about the same | 1.7°C about the same | 629 mm |
| Draveil 3.3 km | same station | 25.8°C about the same | 2.1°C about the same | 622 mm |
Viry-Châtillon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Orly station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.2°C | 2.1°C | 4.7°C | 47 mm | 53 |
| February | 8.5°C | 2.0°C | 5.2°C | 43 mm | 85 |
| March | 12.5°C | 4.2°C | 8.3°C | 44 mm | 153 |
| April | 16.2°C | 6.4°C | 11.3°C | 45 mm | 203 |
| May | 19.8°C | 9.9°C | 14.8°C | 63 mm | 217 |
| June | 23.2°C | 13.1°C | 18.2°C | 56 mm | 224 |
| July | 25.8°C | 15.0°C | 20.4°C | 53 mm | 247 |
| August | 25.7°C | 14.6°C | 20.2°C | 58 mm | 221 |
| September | 21.5°C | 11.5°C | 16.5°C | 47 mm | 186 |
| October | 16.4°C | 8.7°C | 12.6°C | 53 mm | 117 |
| November | 10.9°C | 5.0°C | 7.9°C | 53 mm | 62 |
| December | 7.6°C | 2.7°C | 5.2°C | 60 mm | 64 |
| Year | 16.3°C | 7.9°C | 12.1°C | 622 mm | 1,831 |
Where Viry-Châtillon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Orly, 5.6 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, 5.6 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 Viry-Châtillon’s climate
How warm does Viry-Châtillon get in summer?
July is the warmest month, with average highs of 25.8°C. About 54 days a year reach 25°C, fewer than 63% of mainland French towns, and about 13 reach 30°C.
How cold does Viry-Châtillon get in winter?
February nights average 2.0°C. The air drops to 0°C or below on about 36 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Viry-Châtillon get?
About 622 mm a year, less than 91% of mainland French towns. May is the wettest month (63 mm) and February the driest (43 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Orly (5.6 km away), averages 1,831 hours of sunshine a year.
Are these figures for Viry-Châtillon itself?
No: they are the normals of the Météo-France station matched to Viry-Châtillon, Orly, 5.6 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 ORLY, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Viry-Châtillon →
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.