Dry weather: only 653 mm a year falls on Chaumont, less than on 82% of mainland French towns
The coldest hours of a January night bottom out at 2.0°C on average. The rainiest month is October; the driest is March. Long walks are most pleasant from May to September, when afternoons reach 20–26°C.
These are the figures of Météo-France’s La Brosse-Mx station, 6.9 km north-west.
A year in Chaumont at a glance
Each month’s typical high and low in °C, at the La Brosse-Mx station.
What a year in Chaumont feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at La Brosse-Mx.
About 653 mm of rain a year
October is the wettest month and March the driest. About 16 days a year bring 10 mm or more. 14th wettest of 19 towns of 2,500+ in Yonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Melun
42 frosts and 59 days of 25°C a year
On about 42 nights a year the air drops to 0°C or below, and on about 5 days it stays below freezing all day. About 59 days a year reach 25°C, and 17 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at La Brosse-Mx: 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 La Brosse-Mx
La Brosse-Mx is 6.9 km north-west of Chaumont. Every figure on this page is the station’s, not a measurement in Chaumont itself.
| Station (Météo-France number) | La Brosse-Mx (77054001) |
| Distance from the town | 6.9 km north-west |
| Station altitude | 77 m |
| Town altitude (its center) | 86 m |
| Period | 1991–2020 |
| Sunshine measured at | Melun, 45 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 Chaumont 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.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Chaumont | La Brosse-Mx | 26.4°C | 2.0°C | 653 mm |
| Villeneuve-la-Guyard 3.7 km | same station | 26.4°C about the same | 2.0°C about the same | 653 mm |
| Pont-sur-Yonne 8.3 km | same station | 26.4°C about the same | 2.0°C about the same | 653 mm |
| Cannes-Écluse 10 km | same station | 26.4°C about the same | 2.0°C about the same | 653 mm |
| Saint-Germain-Laval 13 km | same station | 26.4°C about the same | 2.0°C about the same | 653 mm |
| Montereau-Fault-Yonne 13 km | same station | 26.4°C about the same | 2.0°C about the same | 653 mm |
| Varennes-sur-Seine 14 km | same station | 26.4°C about the same | 2.0°C about the same | 653 mm |
Chaumont weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the La Brosse-Mx station; sunshine at Melun.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.0°C | 2.0°C | 4.5°C | 51 mm | 60 |
| February | 8.3°C | 1.8°C | 5.0°C | 48 mm | 83 |
| March | 12.6°C | 3.7°C | 8.1°C | 48 mm | 143 |
| April | 16.3°C | 5.6°C | 10.9°C | 52 mm | 188 |
| May | 20.0°C | 9.2°C | 14.6°C | 60 mm | 216 |
| June | 23.6°C | 12.3°C | 18.0°C | 53 mm | 226 |
| July | 26.4°C | 14.4°C | 20.4°C | 52 mm | 235 |
| August | 26.1°C | 14.2°C | 20.2°C | 52 mm | 225 |
| September | 21.7°C | 11.1°C | 16.4°C | 51 mm | 180 |
| October | 16.6°C | 8.5°C | 12.5°C | 63 mm | 119 |
| November | 10.7°C | 4.9°C | 7.8°C | 60 mm | 68 |
| December | 7.5°C | 2.6°C | 5.1°C | 63 mm | 54 |
| Year | 16.4°C | 7.5°C | 12.0°C | 653 mm | 1,798 |
Where Chaumont’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for La Brosse-Mx, 6.9 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, Melun, 45 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 Chaumont’s climate
How warm does Chaumont get in summer?
July is the warmest month, with average highs of 26.4°C. About 59 days a year reach 25°C, fewer than 53% of mainland French towns, and about 17 reach 30°C.
How cold does Chaumont get in winter?
February nights average 1.8°C. The air drops to 0°C or below on about 42 nights a year, and about 5 days a year stay below freezing all day.
How much rain does Chaumont get?
About 653 mm a year, less than 82% of mainland French towns. October is the wettest month (63 mm) and March the driest (48 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Melun (45 km away), averages 1,798 hours of sunshine a year.
Are these figures for Chaumont itself?
No: they are the normals of the Météo-France station matched to Chaumont, La Brosse-Mx, 6.9 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 LA BROSSE-MX, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Chaumont →
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.