Frosty mornings in Foissy-sur-Vanne outnumber those of 90% of mainland French towns
Peak summer warmth arrives in July, with afternoons near 26.2°C. Wet weather is most frequent in December and least in March. Homes need heating from November to April, the months averaging under 10°C.
Figures from Météo-France’s Flacy station, 7.8 km east.
A year in Foissy-sur-Vanne at a glance
Each month’s typical high and low in °C, at the Flacy station.
What a year in Foissy-sur-Vanne feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Flacy.
About 741 mm of rain a year
December is the wettest month and March the driest. About 19 days a year bring 10 mm or more. 6th wettest of 19 towns of 2,500+ in Yonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Troyes-Barberey
A frosty town: 68 frosts and 61 days of 25°C a year
On about 68 nights a year the air drops to 0°C or below, and on about 7 days it stays below freezing all day. About 61 days a year reach 25°C, and 19 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Flacy: 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 Flacy
Flacy is 7.8 km east of Foissy-sur-Vanne. Every figure on this page is the station’s, not a measurement in Foissy-sur-Vanne itself.
| Station (Météo-France number) | Flacy (89165001) |
| Distance from the town | 7.8 km east |
| Station altitude | 118 m |
| Town altitude (its center) | 99 m |
| Period | 1991–2020 |
| Sunshine measured at | Troyes-Barberey, 40 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 Foissy-sur-Vanne 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 |
|---|---|---|---|---|
| Foissy-sur-Vanne | Flacy | 26.2°C | 0.8°C | 741 mm |
| Saint-Clément 16 km | Sens | 26.5°C about the same | 1.7°C 0.9°C milder | 645 mm |
| Sens 16 km | Sens | 26.5°C about the same | 1.7°C 0.9°C milder | 645 mm |
| Aix-Villemaur-Pâlis 16 km | same station | 26.2°C about the same | 0.8°C about the same | 741 mm |
| Paron 19 km | Sens | 26.5°C about the same | 1.7°C 0.9°C milder | 645 mm |
| Villeneuve-sur-Yonne 22 km | Sens | 26.5°C about the same | 1.7°C 0.9°C milder | 645 mm |
| Pont-sur-Yonne 24 km | La Brosse-Mx | 26.4°C about the same | 2.0°C 1.2°C milder | 653 mm |
Foissy-sur-Vanne weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Flacy station; sunshine at Troyes-Barberey.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.7°C | 0.8°C | 3.8°C | 61 mm | 63 |
| February | 8.1°C | 0.5°C | 4.3°C | 55 mm | 90 |
| March | 12.3°C | 2.2°C | 7.2°C | 53 mm | 148 |
| April | 16.0°C | 3.8°C | 9.9°C | 58 mm | 190 |
| May | 20.0°C | 7.7°C | 13.8°C | 67 mm | 216 |
| June | 23.6°C | 10.9°C | 17.3°C | 63 mm | 231 |
| July | 26.2°C | 12.9°C | 19.6°C | 58 mm | 242 |
| August | 26.0°C | 12.7°C | 19.4°C | 62 mm | 232 |
| September | 21.6°C | 9.5°C | 15.5°C | 56 mm | 186 |
| October | 16.4°C | 7.3°C | 11.9°C | 70 mm | 125 |
| November | 10.6°C | 3.9°C | 7.3°C | 66 mm | 70 |
| December | 7.3°C | 1.7°C | 4.5°C | 72 mm | 57 |
| Year | 16.2°C | 6.2°C | 11.2°C | 741 mm | 1,851 |
Where Foissy-sur-Vanne’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Flacy, 7.8 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, Troyes-Barberey, 40 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 Foissy-sur-Vanne’s climate
How warm does Foissy-sur-Vanne get in summer?
July is the warmest month, with average highs of 26.2°C. About 61 days a year reach 25°C, more than 51% of mainland French towns, and about 19 reach 30°C.
How cold does Foissy-sur-Vanne get in winter?
February nights average 0.5°C. The air drops to 0°C or below on about 68 nights a year, and about 7 days a year stay below freezing all day.
How much rain does Foissy-sur-Vanne get?
About 741 mm a year, less than 54% of mainland French towns. December is the wettest month (72 mm) and March the driest (53 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Troyes-Barberey (40 km away), averages 1,851 hours of sunshine a year.
Are these figures for Foissy-sur-Vanne itself?
No: they are the normals of the Météo-France station matched to Foissy-sur-Vanne, Flacy, 7.8 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 FLACY, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Foissy-sur-Vanne →
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.