Less rain falls on Thiais than on 95% of mainland French towns: 607 mm a year
Nights in January average 2.8°C. The rainiest month is December; the driest is September. Only about 27 nights a year bring a frost, fewer than in 81% of mainland French towns. Frost greets about 27 mornings a year, so leave time to clear the car.
These are the figures of Météo-France’s Choisy-le-Roi station, 2.1 km east.
A year in Thiais at a glance
Each month’s typical high and low in °C, at the Choisy-le-Roi station.
What a year in Thiais feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Choisy-le-Roi.
About 607 mm of rain a year
December is the wettest month and September the driest. About 14 days a year bring 10 mm or more. 41st wettest of 47 towns of 2,500+ in Val-de-Marne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Orly
27 frosts and 62 days of 25°C a year
On about 27 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 Choisy-le-Roi: 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 Choisy-le-Roi
Choisy-le-Roi is 2.1 km east of Thiais. Every figure on this page is the station’s, not a measurement in Thiais itself.
| Station (Météo-France number) | Choisy-le-Roi (94022001) |
| Distance from the town | 2.1 km east |
| Station altitude | 34 m |
| Town altitude (its center) | 66 m |
| Period | 1991–2020 |
| Sunshine measured at | Orly, 5.1 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 Thiais 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-de-Marne.
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 |
|---|---|---|---|---|
| Thiais | Choisy-le-Roi | 26.2°C | 2.8°C | 607 mm |
| Choisy-le-Roi 1.6 km | same station | 26.2°C about the same | 2.8°C about the same | 607 mm |
| Orly 2.2 km | same station | 26.2°C about the same | 2.8°C about the same | 607 mm |
| Chevilly-Larue 2.4 km | Orly | 25.8°C about the same | 2.1°C 0.7°C colder | 622 mm |
| Vitry-sur-Seine 2.8 km | same station | 26.2°C about the same | 2.8°C about the same | 607 mm |
| Rungis 3.6 km | Orly | 25.8°C about the same | 2.1°C 0.7°C colder | 622 mm |
| Villejuif 3.8 km | Paris-Montsouris | 25.7°C 0.5°C cooler | 3.2°C about the same | 634 mm |
Thiais weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Choisy-le-Roi station; sunshine at Orly.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.7°C | 2.8°C | 5.3°C | 50 mm | 53 |
| February | 8.9°C | 2.7°C | 5.8°C | 43 mm | 85 |
| March | 12.8°C | 4.8°C | 8.8°C | 43 mm | 153 |
| April | 16.9°C | 7.3°C | 12.1°C | 45 mm | 203 |
| May | 20.5°C | 10.7°C | 15.6°C | 59 mm | 217 |
| June | 23.8°C | 13.9°C | 18.9°C | 55 mm | 224 |
| July | 26.2°C | 15.8°C | 21.0°C | 53 mm | 247 |
| August | 26.2°C | 15.6°C | 20.9°C | 53 mm | 221 |
| September | 21.9°C | 12.5°C | 17.2°C | 43 mm | 186 |
| October | 16.6°C | 9.2°C | 12.9°C | 52 mm | 117 |
| November | 11.1°C | 5.6°C | 8.4°C | 53 mm | 62 |
| December | 8.1°C | 3.3°C | 5.7°C | 60 mm | 64 |
| Year | 16.7°C | 8.7°C | 12.7°C | 607 mm | 1,831 |
Where Thiais’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Choisy-le-Roi, 2.1 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, 5.1 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-de-Marne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Thiais’s climate
How warm does Thiais get in summer?
July 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 Thiais get in winter?
February nights average 2.7°C. The air drops to 0°C or below on about 27 nights a year, and about 3 days a year stay below freezing all day.
How much rain does Thiais get?
About 607 mm a year, less than 95% of mainland French towns. December is the wettest month (60 mm) and September the driest (43 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Orly (5.1 km away), averages 1,831 hours of sunshine a year.
Are these figures for Thiais itself?
No: they are the normals of the Météo-France station matched to Thiais, Choisy-le-Roi, 2.1 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 CHOISY-LE-ROI, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Thiais →
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.