Ice on the ground: Aisy-sur-Armançon sees more frosts than 86% of mainland French towns
Midsummer highs settle at about 26.3°C. Of all months, December brings the most rain and August the least. Of the 19 towns of 2,500+ in Yonne, it is the wettest. Keep the boiler serviced for the months from November to March, which average under 10°C.
Figures from Météo-France’s Montbard station, 9 km south-east.
A year in Aisy-sur-Armançon at a glance
Each month’s typical high and low in °C, at the Montbard station.
What a year in Aisy-sur-Armançon 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 9 km south-east of Aisy-sur-Armançon. Every figure on this page is the station’s, not a measurement in Aisy-sur-Armançon itself.
| Station (Météo-France number) | Montbard (21425001) |
| Distance from the town | 9 km south-east |
| Station altitude | 209 m |
| Town altitude (its center) | 200 m |
| Period | 1992–2020 (the station’s own record) |
| Sunshine measured at | Châtillon/Seine, 33 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 Aisy-sur-Armançon 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 |
|---|---|---|---|---|
| Aisy-sur-Armançon | Montbard | 26.3°C | 0.5°C | 854 mm |
| Montbard 9.6 km | same station | 26.3°C about the same | 0.5°C about the same | 854 mm |
| Semur-en-Auxois 21 km | Semur-en-Auxois | 26.0°C about the same | 0.3°C about the same | 778 mm |
| Venarey-les-Laumes 22 km | same station | 26.3°C about the same | 0.5°C about the same | 854 mm |
| Tonnerre 28 km | Chablis | 27.2°C 0.9°C warmer | 0.6°C about the same | 740 mm |
Aisy-sur-Armançon 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 Aisy-sur-Armançon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Montbard, 9 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, 33 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 Aisy-sur-Armançon’s climate
How warm does Aisy-sur-Armançon 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 Aisy-sur-Armançon 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 Aisy-sur-Armançon 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 (33 km away), averages 1,792 hours of sunshine a year.
Are these figures for Aisy-sur-Armançon itself?
No: they are the normals of the Météo-France station matched to Aisy-sur-Armançon, Montbard, 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 MONTBARD_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Aisy-sur-Armançon →
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.