Merry-Sec has colder winter nights than 78% of mainland French towns
High summer brings afternoon highs near 25.0°C. A year here swings 24°C from midwinter lows to midsummer highs. Only about 47 days a year reach 25°C, fewer than in 73% of mainland French towns. Gritters and ice scrapers earn their keep on roughly 50 nights a year below 0°C.
Figures from Météo-France’s Molesmes station, 5.1 km south.
A year in Merry-Sec at a glance
Each month’s typical high and low in °C, at the Molesmes station.
What a year in Merry-Sec feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Molesmes.
About 850 mm of rain a year
October is the wettest month and July 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 Nevers-Marzy
50 frosts and 47 days of 25°C a year
On about 50 nights a year the air drops to 0°C or below, and on about 10 days it stays below freezing all day. About 47 days a year reach 25°C, and 13 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Molesmes: 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 Molesmes
Molesmes is 5.1 km south of Merry-Sec. Every figure on this page is the station’s, not a measurement in Merry-Sec itself.
| Station (Météo-France number) | Molesmes (89260001) |
| Distance from the town | 5.1 km south |
| Station altitude | 355 m |
| Town altitude (its center) | 324 m |
| Period | 1991–2020 |
| Sunshine measured at | Nevers-Marzy, 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-Sec 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, each with its own matched station.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Merry-Sec | Molesmes | 25.0°C | 0.7°C | 850 mm |
| Toucy 16 km | Grandchamp | 25.8°C 0.8°C warmer | 1.2°C 0.5°C milder | 759 mm |
| Saint-Georges-sur-Baulche 17 km | Aillant | 27.5°C 2.5°C warmer | 0.3°C about the same | 727 mm |
| Auxerre 17 km | Aillant | 27.5°C 2.5°C warmer | 0.3°C about the same | 727 mm |
| Clamecy 22 km | Merry-sur-Yonne | 26.4°C 1.4°C warmer | 0.8°C about the same | 777 mm |
| Monéteau 23 km | Aillant | 27.5°C 2.5°C warmer | 0.3°C about the same | 727 mm |
| Appoigny 24 km | Aillant | 27.5°C 2.5°C warmer | 0.3°C about the same | 727 mm |
Merry-Sec weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Molesmes station; sunshine at Nevers-Marzy.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 5.4°C | 0.7°C | 3.1°C | 73 mm | 63 |
| February | 6.8°C | 0.7°C | 3.8°C | 62 mm | 91 |
| March | 11.2°C | 3.4°C | 7.3°C | 62 mm | 154 |
| April | 14.8°C | 5.7°C | 10.2°C | 70 mm | 181 |
| May | 18.6°C | 9.2°C | 13.9°C | 74 mm | 205 |
| June | 22.4°C | 12.5°C | 17.4°C | 69 mm | 226 |
| July | 25.0°C | 14.6°C | 19.8°C | 61 mm | 245 |
| August | 24.9°C | 14.7°C | 19.8°C | 64 mm | 236 |
| September | 20.3°C | 11.3°C | 15.8°C | 63 mm | 189 |
| October | 15.2°C | 8.2°C | 11.7°C | 89 mm | 123 |
| November | 9.4°C | 4.0°C | 6.7°C | 80 mm | 72 |
| December | 6.0°C | 1.5°C | 3.8°C | 84 mm | 59 |
| Year | 15.0°C | 7.2°C | 11.1°C | 850 mm | 1,844 |
Where Merry-Sec’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Molesmes, 5.1 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, Nevers-Marzy, 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-Sec’s climate
How warm does Merry-Sec get in summer?
July is the warmest month, with average highs of 25.0°C. About 47 days a year reach 25°C, fewer than 73% of mainland French towns, and about 13 reach 30°C.
How cold does Merry-Sec get in winter?
January nights average 0.7°C. The air drops to 0°C or below on about 50 nights a year, and about 10 days a year stay below freezing all day.
How much rain does Merry-Sec get?
About 850 mm a year, more than 70% of mainland French towns. October is the wettest month (89 mm) and July the driest (61 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Nevers-Marzy (78 km away), averages 1,844 hours of sunshine a year.
Are these figures for Merry-Sec itself?
No: they are the normals of the Météo-France station matched to Merry-Sec, Molesmes, 5.1 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 MOLESMES_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Merry-Sec →
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.