Frost comes to Cézy more often than to 92% of mainland French towns
July afternoons average 27.5°C. Only 28°C separates winter nights from summer afternoons. Of the 19 towns of 2,500+ in Yonne, it has the warmest July afternoons. Wet days, with 1 mm of rain or more, come about 119 times a year.
Figures from Météo-France’s Aillant station, 14 km south.
A year in Cézy at a glance
Each month’s typical high and low in °C, at the Aillant station.
What a year in Cézy feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Aillant.
About 727 mm of rain a year
December is the wettest month and March the driest. About 19 days a year bring 10 mm or more. 7th 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: 72 frosts and 76 days of 25°C a year
On about 72 nights a year the air drops to 0°C or below, and on about 5 days it stays below freezing all day. About 76 days a year reach 25°C, and 26 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Aillant: 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 Aillant
Aillant is 14 km south of Cézy. Every figure on this page is the station’s, not a measurement in Cézy itself.
| Station (Météo-France number) | Aillant (89003001) |
| Distance from the town | 14 km south |
| Station altitude | 124 m |
| Town altitude (its center) | 93 m |
| Period | 1991–2020 |
| Nearest station of any kind | 11 km |
| Sunshine measured at | Troyes-Barberey, 63 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 Cézy 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 |
|---|---|---|---|---|
| Cézy | Aillant | 27.5°C | 0.3°C | 727 mm |
| Joigny 6.4 km | same station | 27.5°C about the same | 0.3°C about the same | 727 mm |
| Villeneuve-sur-Yonne 9.8 km | Sens | 26.5°C 1°C cooler | 1.7°C 1.4°C milder | 645 mm |
| Montholon 12 km | same station | 27.5°C about the same | 0.3°C about the same | 727 mm |
| Migennes 15 km | same station | 27.5°C about the same | 0.3°C about the same | 727 mm |
| Charny Orée de Puisaye 20 km | Grandchamp | 25.8°C 1.7°C cooler | 1.2°C 0.9°C milder | 759 mm |
| Courtenay 20 km | Savigny/Clairis | 25.6°C 1.9°C cooler | 1.4°C 1.1°C milder | 732 mm |
Cézy weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Aillant station; sunshine at Troyes-Barberey.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.1°C | 0.3°C | 3.7°C | 63 mm | 63 |
| February | 8.8°C | 0.0°C | 4.4°C | 55 mm | 90 |
| March | 13.2°C | 1.7°C | 7.5°C | 54 mm | 148 |
| April | 17.0°C | 3.7°C | 10.4°C | 57 mm | 190 |
| May | 21.0°C | 7.5°C | 14.2°C | 67 mm | 216 |
| June | 24.8°C | 10.9°C | 17.9°C | 55 mm | 231 |
| July | 27.5°C | 12.8°C | 20.1°C | 55 mm | 242 |
| August | 27.3°C | 12.5°C | 19.9°C | 57 mm | 232 |
| September | 22.7°C | 9.0°C | 15.9°C | 58 mm | 186 |
| October | 17.3°C | 6.7°C | 12.0°C | 70 mm | 125 |
| November | 11.1°C | 3.2°C | 7.1°C | 68 mm | 70 |
| December | 7.6°C | 1.0°C | 4.3°C | 71 mm | 57 |
| Year | 17.1°C | 5.8°C | 11.5°C | 727 mm | 1,851 |
Where Cézy’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Aillant, 14 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, 63 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 Cézy’s climate
How warm does Cézy get in summer?
July is the warmest month, with average highs of 27.5°C. About 76 days a year reach 25°C, more than 68% of mainland French towns, and about 26 reach 30°C.
How cold does Cézy get in winter?
February nights average 0.0°C. The air drops to 0°C or below on about 72 nights a year, and about 5 days a year stay below freezing all day.
How much rain does Cézy get?
About 727 mm a year, less than 61% of mainland French towns. December is the wettest month (71 mm) and March the driest (54 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Troyes-Barberey (63 km away), averages 1,851 hours of sunshine a year.
Are these figures for Cézy itself?
No: they are the normals of the Météo-France station matched to Cézy, Aillant, 14 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 AILLANT, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Cézy →
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.