Ice on the ground: Merry-la-Vallée sees more frosts than 79% of mainland French towns
High summer brings afternoon highs near 25.8°C. Of all months, October brings the most rain and February the least. By warm days alone, it ranks cooler than 61% of mainland French towns. Waterproofs come out on about 124 days a year, each with 1 mm of rain or more.
Figures from Météo-France’s Grandchamp station, 11 km west.
A year in Merry-la-Vallée at a glance
Each month’s typical high and low in °C, at the Grandchamp station.
What a year in Merry-la-Vallée feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Grandchamp.
About 759 mm of rain a year
October is the wettest month and February the driest. About 20 days a year bring 10 mm or more. 4th 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: 59 frosts and 55 days of 25°C a year
On about 59 nights a year the air drops to 0°C or below, and on about 6 days it stays below freezing all day. About 55 days a year reach 25°C, and 16 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Grandchamp: 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 Grandchamp
Grandchamp is 11 km west of Merry-la-Vallée. Every figure on this page is the station’s, not a measurement in Merry-la-Vallée itself.
| Station (Météo-France number) | Grandchamp (89192001) |
| Distance from the town | 11 km west |
| Station altitude | 180 m |
| Town altitude (its center) | 273 m |
| Period | 1991–2020 |
| Nearest station of any kind | 9.1 km |
| Sunshine measured at | Troyes-Barberey, 78 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 Merry-la-Vallée 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 |
|---|---|---|---|---|
| Merry-la-Vallée | Grandchamp | 25.8°C | 1.2°C | 759 mm |
| Toucy 7.2 km | same station | 25.8°C about the same | 1.2°C about the same | 759 mm |
| Montholon 11 km | Aillant | 27.5°C 1.7°C warmer | 0.3°C 0.9°C colder | 727 mm |
| Saint-Georges-sur-Baulche 15 km | Aillant | 27.5°C 1.7°C warmer | 0.3°C 0.9°C colder | 727 mm |
| Appoigny 17 km | Aillant | 27.5°C 1.7°C warmer | 0.3°C 0.9°C colder | 727 mm |
| Auxerre 18 km | Aillant | 27.5°C 1.7°C warmer | 0.3°C 0.9°C colder | 727 mm |
| Charny Orée de Puisaye 19 km | same station | 25.8°C about the same | 1.2°C about the same | 759 mm |
Merry-la-Vallée weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Grandchamp station; sunshine at Troyes-Barberey.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.7°C | 1.2°C | 3.9°C | 64 mm | 63 |
| February | 8.1°C | 0.8°C | 4.5°C | 55 mm | 90 |
| March | 12.3°C | 2.6°C | 7.5°C | 56 mm | 148 |
| April | 15.8°C | 4.5°C | 10.1°C | 61 mm | 190 |
| May | 19.6°C | 8.1°C | 13.8°C | 69 mm | 216 |
| June | 23.2°C | 11.5°C | 17.4°C | 59 mm | 231 |
| July | 25.8°C | 13.3°C | 19.6°C | 57 mm | 242 |
| August | 25.7°C | 13.1°C | 19.4°C | 60 mm | 232 |
| September | 21.3°C | 10.0°C | 15.7°C | 60 mm | 186 |
| October | 16.3°C | 7.8°C | 12.1°C | 75 mm | 125 |
| November | 10.6°C | 4.2°C | 7.4°C | 72 mm | 70 |
| December | 7.4°C | 1.8°C | 4.6°C | 72 mm | 57 |
| Year | 16.1°C | 6.6°C | 11.3°C | 759 mm | 1,851 |
Where Merry-la-Vallée’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Grandchamp, 11 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, 78 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 Merry-la-Vallée’s climate
How warm does Merry-la-Vallée get in summer?
July is the warmest month, with average highs of 25.8°C. About 55 days a year reach 25°C, fewer than 61% of mainland French towns, and about 16 reach 30°C.
How cold does Merry-la-Vallée get in winter?
February nights average 0.8°C. The air drops to 0°C or below on about 59 nights a year, and about 6 days a year stay below freezing all day.
How much rain does Merry-la-Vallée get?
About 759 mm a year, more than 51% of mainland French towns. October is the wettest month (75 mm) and February the driest (55 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Troyes-Barberey (78 km away), averages 1,851 hours of sunshine a year.
Are these figures for Merry-la-Vallée itself?
No: they are the normals of the Météo-France station matched to Merry-la-Vallée, Grandchamp, 11 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 GRANDCHAMP_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Merry-la-Vallée →
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.