Grimault gets more frosts than 86% of mainland French towns
On a normal July day the thermometer tops out near 26.3°C. No month is much wetter than another: December, the wettest, gets little more than August, the driest. Of the 19 towns of 2,500+ in Yonne, it is the wettest. Radiators earn their keep from November to March, the months that average under 10°C.
Figures from Météo-France’s Montbard station, 27 km east: at that distance, read them as the area’s climate rather than the town’s.
A year in Grimault at a glance
Each month’s typical high and low in °C, at the Montbard station.
What a year in Grimault feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Montbard.
About 854 mm of rain a year
December is the wettest month and August the driest. About 25 days a year bring 10 mm or more. The wettest of 19 towns of 2,500+ in Yonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Châtillon/Seine
A frosty town: 65 frosts and 64 days of 25°C a year
On about 65 nights a year the air drops to 0°C or below, and on about 4 days it stays below freezing all day. About 64 days a year reach 25°C, and 21 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Montbard: 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 Montbard
Montbard is 27 km east of Grimault. Every figure on this page is the station’s, not a measurement in Grimault itself.
| Station (Météo-France number) | Montbard (21425001) |
| Distance from the town | 27 km east |
| Station altitude | 209 m |
| Town altitude (its center) | 244 m |
| Period | 1992–2020 (the station’s own record) |
| Nearest station of any kind | 3.2 km |
| Sunshine measured at | Châtillon/Seine, 50 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 Grimault 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 Yonne.
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.
Grimault weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Montbard station; sunshine at Châtillon/Seine.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.2°C | 0.5°C | 3.8°C | 72 mm | 67 |
| February | 8.6°C | 0.4°C | 4.5°C | 63 mm | 90 |
| March | 12.7°C | 1.9°C | 7.3°C | 65 mm | 148 |
| April | 16.5°C | 4.3°C | 10.4°C | 68 mm | 183 |
| May | 20.2°C | 8.3°C | 14.3°C | 79 mm | 201 |
| June | 24.2°C | 11.7°C | 17.9°C | 65 mm | 229 |
| July | 26.3°C | 13.4°C | 19.9°C | 70 mm | 235 |
| August | 26.1°C | 13.1°C | 19.6°C | 58 mm | 215 |
| September | 21.7°C | 9.7°C | 15.7°C | 70 mm | 176 |
| October | 16.9°C | 7.2°C | 12.1°C | 81 mm | 121 |
| November | 11.1°C | 3.4°C | 7.3°C | 81 mm | 72 |
| December | 7.7°C | 1.2°C | 4.5°C | 82 mm | 57 |
| Year | 16.6°C | 6.3°C | 11.4°C | 854 mm | 1,792 |
Where Grimault’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Montbard, 27 km away: statistics for 1991–2020 (the station’s own years, 1992–2020, 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, Châtillon/Seine, 50 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 Yonne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Grimault’s climate
How warm does Grimault get in summer?
July is the warmest month, with average highs of 26.3°C. About 64 days a year reach 25°C, more than 55% of mainland French towns, and about 21 reach 30°C.
How cold does Grimault get in winter?
February nights average 0.4°C. The air drops to 0°C or below on about 65 nights a year, and about 4 days a year stay below freezing all day.
How much rain does Grimault get?
About 854 mm a year, more than 71% of mainland French towns. December is the wettest month (82 mm) and August the driest (58 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Châtillon/Seine (50 km away), averages 1,792 hours of sunshine a year.
Are these figures for Grimault itself?
No: they are the normals of the Météo-France station matched to Grimault, Montbard, 27 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 MONTBARD_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Grimault →
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.