Blaisy is among the frostiest of mainland French towns
Peak summer warmth arrives in July, with afternoons near 25.5°C. Of the 6 towns of 2,500+ in Haute-Marne, it is the wettest. Winter and summer sit 27°C apart. For walks and days out, the stretch from June to September brings highs of 21–26°C.
Figures from Météo-France’s Bourdons station, 26 km east: at that distance, read them as the area’s climate rather than the town’s.
A year in Blaisy at a glance
Each month’s typical high and low in °C, at the Bourdons station.
What a year in Blaisy feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Bourdons.
About 1,011 mm of rain a year
December is the wettest month and April the driest. About 33 days a year bring 10 mm or more. The wettest of 6 towns of 2,500+ in Haute-Marne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Mathaux-Etape
A frosty town: 88 frosts and 54 days of 25°C a year
On about 88 nights a year the air drops to 0°C or below, and on about 9 days it stays below freezing all day. About 54 days a year reach 25°C, and 14 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Bourdons: 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 Bourdons
Bourdons is 26 km east of Blaisy. Every figure on this page is the station’s, not a measurement in Blaisy itself.
| Station (Météo-France number) | Bourdons (52061002) |
| Distance from the town | 26 km east |
| Station altitude | 304 m |
| Town altitude (its center) | 315 m |
| Period | 1991–2020 |
| Nearest station of any kind | 24 km |
| Sunshine measured at | Mathaux-Etape, 44 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 Blaisy 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 Haute-Marne.
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 |
|---|---|---|---|---|
| Blaisy | Bourdons | 25.5°C | −1.0°C | 1,011 mm |
| Chaumont 13 km | same station | 25.5°C about the same | −1.0°C about the same | 1,011 mm |
| Bar-sur-Aube 23 km | Ailleville | 26.2°C 0.7°C warmer | 0.6°C 1.6°C milder | 834 mm |
Blaisy weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Bourdons station; sunshine at Mathaux-Etape.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 5.2°C | −1.0°C | 2.1°C | 94 mm | 69 |
| February | 6.9°C | −1.0°C | 3.0°C | 80 mm | 97 |
| March | 11.3°C | 0.5°C | 5.9°C | 81 mm | 157 |
| April | 15.5°C | 2.5°C | 9.0°C | 68 mm | 207 |
| May | 19.6°C | 6.6°C | 13.1°C | 87 mm | 223 |
| June | 23.4°C | 9.8°C | 16.6°C | 73 mm | 248 |
| July | 25.5°C | 11.6°C | 18.5°C | 79 mm | 252 |
| August | 25.1°C | 11.3°C | 18.2°C | 78 mm | 223 |
| September | 20.5°C | 8.0°C | 14.2°C | 75 mm | 189 |
| October | 15.3°C | 5.8°C | 10.5°C | 95 mm | 127 |
| November | 9.2°C | 2.3°C | 5.8°C | 96 mm | 74 |
| December | 5.9°C | 0.2°C | 3.0°C | 104 mm | 64 |
| Year | 15.3°C | 4.7°C | 10.0°C | 1,011 mm | 1,930 |
Where Blaisy’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Bourdons, 26 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, Mathaux-Etape, 44 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 Haute-Marne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Blaisy’s climate
How warm does Blaisy get in summer?
July is the warmest month, with average highs of 25.5°C. About 54 days a year reach 25°C, fewer than 64% of mainland French towns, and about 14 reach 30°C.
How cold does Blaisy get in winter?
January nights average −1.0°C. The air drops to 0°C or below on about 88 nights a year, and about 9 days a year stay below freezing all day.
How much rain does Blaisy get?
About 1,011 mm a year, more than 88% of mainland French towns. December is the wettest month (104 mm) and April the driest (68 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Mathaux-Etape (44 km away), averages 1,930 hours of sunshine a year.
Are these figures for Blaisy itself?
No: they are the normals of the Météo-France station matched to Blaisy, Bourdons, 26 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 BOURDONS_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Blaisy →
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.