Hardly any mainland French towns collect less rain than Boncé: 606 mm a year
On a normal July day the thermometer tops out near 25.2°C. Warm afternoons come less often than in 73% of mainland French towns. Only 24°C separates winter nights from summer afternoons. Wet days, with 1 mm of rain or more, come about 109 times a year.
Figures from Météo-France’s Chartres station, 17 km north.
A year in Boncé at a glance
Each month’s typical high and low in °C, at the Chartres station.
What a year in Boncé feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Chartres.
About 606 mm of rain a year
December is the wettest month and February the driest. About 15 days a year bring 10 mm or more. 18th wettest of 33 towns of 2,500+ in Eure-et-Loir.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Chartres
45 frosts and 47 days of 25°C a year
On about 45 nights a year the air drops to 0°C or below, and on about 5 days it stays below freezing all day. About 47 days a year reach 25°C, and 12 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Chartres: 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 Chartres
Chartres is 17 km north of Boncé. Every figure on this page is the station’s, not a measurement in Boncé itself.
| Station (Météo-France number) | Chartres (28070001) |
| Distance from the town | 17 km north |
| Station altitude | 155 m |
| Town altitude (its center) | 154 m |
| Period | 1991–2020 |
| Nearest station of any kind | 11 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 Boncé 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. 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 |
|---|---|---|---|---|
| Boncé | Chartres | 25.2°C | 1.8°C | 606 mm |
| Les Villages Vovéens 8.9 km | Viabon | 26.2°C 1°C warmer | 1.7°C about the same | 601 mm |
| Le Coudray 13 km | same station | 25.2°C about the same | 1.8°C about the same | 606 mm |
| Luisant 13 km | same station | 25.2°C about the same | 1.8°C about the same | 606 mm |
| Lucé 15 km | same station | 25.2°C about the same | 1.8°C about the same | 606 mm |
| Chartres 15 km | same station | 25.2°C about the same | 1.8°C about the same | 606 mm |
| Mainvilliers 16 km | same station | 25.2°C about the same | 1.8°C about the same | 606 mm |
Boncé weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Chartres station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.9°C | 1.8°C | 4.3°C | 50 mm | 64 |
| February | 8.2°C | 1.5°C | 4.8°C | 42 mm | 88 |
| March | 12.2°C | 3.4°C | 7.8°C | 44 mm | 140 |
| April | 15.6°C | 5.1°C | 10.3°C | 45 mm | 184 |
| May | 19.0°C | 8.5°C | 13.8°C | 55 mm | 209 |
| June | 22.5°C | 11.6°C | 17.0°C | 52 mm | 222 |
| July | 25.2°C | 13.5°C | 19.4°C | 51 mm | 230 |
| August | 25.3°C | 13.4°C | 19.4°C | 48 mm | 220 |
| September | 21.4°C | 10.5°C | 15.9°C | 46 mm | 181 |
| October | 16.2°C | 8.0°C | 12.1°C | 58 mm | 118 |
| November | 10.6°C | 4.5°C | 7.6°C | 56 mm | 72 |
| December | 7.3°C | 2.2°C | 4.8°C | 61 mm | 60 |
| Year | 15.9°C | 7.0°C | 11.4°C | 606 mm | 1,787 |
Where Boncé’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Chartres, 17 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, Chartres, 17 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 Boncé’s climate
How warm does Boncé get in summer?
August is the warmest month, with average highs of 25.3°C. About 47 days a year reach 25°C, fewer than 73% of mainland French towns, and about 12 reach 30°C.
How cold does Boncé get in winter?
February nights average 1.5°C. The air drops to 0°C or below on about 45 nights a year, and about 5 days a year stay below freezing all day.
How much rain does Boncé get?
About 606 mm a year, less than 95% of mainland French towns. December is the wettest month (61 mm) and February the driest (42 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Chartres (17 km away), averages 1,787 hours of sunshine a year.
Are these figures for Boncé itself?
No: they are the normals of the Météo-France station matched to Boncé, Chartres, 17 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 CHARTRES, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Boncé →
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.