Rainfall in Allonnes trails that of 91% of mainland French towns: 626 mm a year
In January the night’s low is typically 1.4°C. Winter and summer sit 25°C apart. Frosty nights outnumber those of 66% of mainland French towns. Comfortable outdoor weather lasts from May to September, with highs of 20–26°C.
These are the figures of Météo-France’s Louville station, 12 km east.
A year in Allonnes at a glance
Each month’s typical high and low in °C, at the Louville station.
What a year in Allonnes feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Louville.
About 626 mm of rain a year
December is the wettest month and September the driest. About 16 days a year bring 10 mm or more. 12th wettest of 33 towns of 2,500+ in Eure-et-Loir.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Chartres
48 frosts and 60 days of 25°C a year
On about 48 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 60 days a year reach 25°C, and 17 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Louville: 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 Louville
Louville is 12 km east of Allonnes. Every figure on this page is the station’s, not a measurement in Allonnes itself.
| Station (Météo-France number) | Louville (28215001) |
| Distance from the town | 12 km east |
| Station altitude | 145 m |
| Town altitude (its center) | 146 m |
| Period | 1995–2020 (the station’s own record) |
| Sunshine measured at | Chartres, 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 Allonnes 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 Eure-et-Loir.
Nearby towns’ climate
The nearest towns of 2,500+ within 29 km, each with its own matched station.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Allonnes | Louville | 26.1°C | 1.4°C | 626 mm |
| Les Villages Vovéens 7.3 km | Viabon | 26.2°C about the same | 1.7°C about the same | 601 mm |
| Le Coudray 16 km | Chartres | 25.2°C 0.9°C cooler | 1.8°C about the same | 606 mm |
| Luisant 17 km | Chartres | 25.2°C 0.9°C cooler | 1.8°C about the same | 606 mm |
| Chartres 17 km | Chartres | 25.2°C 0.9°C cooler | 1.8°C about the same | 606 mm |
| Auneau-Bleury-Saint-Symphorien 18 km | Sainville | 25.9°C about the same | 1.2°C about the same | 656 mm |
| Champhol 19 km | Chartres | 25.2°C 0.9°C cooler | 1.8°C about the same | 606 mm |
Allonnes weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Louville station; sunshine at Chartres.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.7°C | 1.4°C | 4.1°C | 48 mm | 64 |
| February | 8.3°C | 1.3°C | 4.8°C | 44 mm | 88 |
| March | 12.4°C | 3.0°C | 7.7°C | 46 mm | 140 |
| April | 16.3°C | 4.8°C | 10.6°C | 43 mm | 184 |
| May | 19.8°C | 8.2°C | 14.0°C | 62 mm | 209 |
| June | 23.6°C | 11.2°C | 17.4°C | 56 mm | 222 |
| July | 26.1°C | 12.9°C | 19.5°C | 50 mm | 230 |
| August | 26.1°C | 13.1°C | 19.6°C | 50 mm | 220 |
| September | 22.4°C | 10.3°C | 16.3°C | 40 mm | 181 |
| October | 16.7°C | 7.9°C | 12.3°C | 60 mm | 118 |
| November | 10.7°C | 4.3°C | 7.5°C | 62 mm | 72 |
| December | 7.1°C | 1.9°C | 4.5°C | 65 mm | 60 |
| Year | 16.4°C | 6.7°C | 11.5°C | 626 mm | 1,787 |
Where Allonnes’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Louville, 12 km away: statistics for 1991–2020 (the station’s own years, 1995–2020, where its record is shorter).
- 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, Chartres, 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 Eure-et-Loir.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Allonnes’s climate
How warm does Allonnes get in summer?
July is the warmest month, with average highs of 26.1°C. About 60 days a year reach 25°C, fewer than 50% of mainland French towns, and about 17 reach 30°C.
How cold does Allonnes get in winter?
February nights average 1.3°C. The air drops to 0°C or below on about 48 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Allonnes get?
About 626 mm a year, less than 91% of mainland French towns. December is the wettest month (65 mm) and September the driest (40 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Chartres (18 km away), averages 1,787 hours of sunshine a year.
Are these figures for Allonnes itself?
No: they are the normals of the Météo-France station matched to Allonnes, Louville, 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 LOUVILLE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Allonnes →
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.