Dry weather: only 677 mm a year falls on Thiverval-Grignon, less than on 76% of mainland French towns
In January the night’s low is typically 1.7°C. From frosty January to warm July, readings climb 25°C. Frost is common: about 52 nights a year drop below freezing, more than in 72% of mainland French towns. An umbrella earns its place on about 118 days a year with 1 mm of rain or more.
Figures from Météo-France’s Maule station, 8.2 km north-west.
A year in Thiverval-Grignon at a glance
Each month’s typical high and low in °C, at the Maule station.
What a year in Thiverval-Grignon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Maule.
About 677 mm of rain a year
December is the wettest month and September the driest. About 18 days a year bring 10 mm or more. 30th wettest of 95 towns of 2,500+ in Yvelines.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Trappes
A frosty town: 52 frosts and 63 days of 25°C a year
On about 52 nights a year the air drops to 0°C or below, and on about 3 days it stays below freezing all day. About 63 days a year reach 25°C, and 19 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Maule: 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 Maule
Maule is 8.2 km north-west of Thiverval-Grignon. Every figure on this page is the station’s, not a measurement in Thiverval-Grignon itself.
| Station (Météo-France number) | Maule (78380001) |
| Distance from the town | 8.2 km north-west |
| Station altitude | 33 m |
| Town altitude (its center) | 86 m |
| Period | 1991–2020 |
| Sunshine measured at | Trappes, 11 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 Thiverval-Grignon 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 Yvelines.
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 |
|---|---|---|---|---|
| Thiverval-Grignon | Maule | 26.2°C | 1.7°C | 677 mm |
| Beynes 2.8 km | same station | 26.2°C about the same | 1.7°C about the same | 677 mm |
| Plaisir 3.8 km | Trappes | 24.6°C 1.6°C cooler | 1.9°C about the same | 686 mm |
| Neauphle-le-Château 3.9 km | Trappes | 24.6°C 1.6°C cooler | 1.9°C about the same | 686 mm |
| Villiers-Saint-Frédéric 4.3 km | Trappes | 24.6°C 1.6°C cooler | 1.9°C about the same | 686 mm |
| Feucherolles 5.3 km | Trappes | 24.6°C 1.6°C cooler | 1.9°C about the same | 686 mm |
| Les Clayes-sous-Bois 5.4 km | Trappes | 24.6°C 1.6°C cooler | 1.9°C about the same | 686 mm |
Thiverval-Grignon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Maule station; sunshine at Trappes.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.7°C | 1.7°C | 4.7°C | 57 mm | 57 |
| February | 8.9°C | 1.3°C | 5.1°C | 50 mm | 81 |
| March | 12.9°C | 3.1°C | 8.0°C | 51 mm | 134 |
| April | 16.7°C | 4.9°C | 10.8°C | 47 mm | 176 |
| May | 20.4°C | 8.5°C | 14.4°C | 65 mm | 202 |
| June | 23.7°C | 11.6°C | 17.7°C | 56 mm | 210 |
| July | 26.2°C | 13.4°C | 19.8°C | 53 mm | 222 |
| August | 26.0°C | 13.1°C | 19.5°C | 53 mm | 216 |
| September | 22.0°C | 10.1°C | 16.1°C | 46 mm | 177 |
| October | 16.8°C | 7.7°C | 12.2°C | 65 mm | 117 |
| November | 11.3°C | 4.4°C | 7.8°C | 61 mm | 68 |
| December | 8.0°C | 2.1°C | 5.1°C | 73 mm | 55 |
| Year | 16.7°C | 6.8°C | 11.8°C | 677 mm | 1,714 |
Where Thiverval-Grignon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Maule, 8.2 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, Trappes, 11 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 Yvelines.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Thiverval-Grignon’s climate
How warm does Thiverval-Grignon get in summer?
July is the warmest month, with average highs of 26.2°C. About 63 days a year reach 25°C, more than 53% of mainland French towns, and about 19 reach 30°C.
How cold does Thiverval-Grignon get in winter?
February nights average 1.3°C. The air drops to 0°C or below on about 52 nights a year, and about 3 days a year stay below freezing all day.
How much rain does Thiverval-Grignon get?
About 677 mm a year, less than 76% of mainland French towns. December is the wettest month (73 mm) and September the driest (46 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Trappes (11 km away), averages 1,714 hours of sunshine a year.
Are these figures for Thiverval-Grignon itself?
No: they are the normals of the Météo-France station matched to Thiverval-Grignon, Maule, 8.2 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 MAULE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Thiverval-Grignon →
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.