Longchaumois sits near the bottom of mainland French towns for winter warmth
On a normal July day the thermometer tops out near 22.2°C. It is a wet place: more rain falls here than on almost every mainland French town. The gap between a January night and a July afternoon is 28°C. The outdoor season, with highs of 22°C, runs through July and August.
Figures from Météo-France’s Mouthe station, 34 km north-east: at that distance, read them as the area’s climate rather than the town’s.
A year in Longchaumois at a glance
Each month’s typical high and low in °C, at the Mouthe station.
What a year in Longchaumois feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Mouthe.
About 1,677 mm of rain a year
December is the wettest month and April the driest. About 62 days a year bring 10 mm or more. 3rd wettest of 11 towns of 2,500+ in Jura.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Meythet
A frosty town: 149 frosts and 29 days of 25°C a year
On about 149 nights a year the air drops to 0°C or below, and on about 22 days it stays below freezing all day. About 29 days a year reach 25°C, and 3 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Mouthe: 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 Mouthe
Mouthe is 34 km north-east of Longchaumois. Every figure on this page is the station’s, not a measurement in Longchaumois itself.
| Station (Météo-France number) | Mouthe (25413001) |
| Distance from the town | 34 km north-east |
| Station altitude | 940 m |
| Town altitude (its center) | 910 m |
| Period | 1991–2020 |
| Nearest station of any kind | 5 km |
| Sunshine measured at | Meythet, 61 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 Longchaumois 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 Jura.
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 |
|---|---|---|---|---|
| Longchaumois | Mouthe | 22.2°C | −6.1°C | 1,677 mm |
| Hauts de Bienne 8.6 km | Saint-Claude | 26.9°C 4.7°C warmer | −2.3°C 3.8°C milder | 1,869 mm |
| Les Rousses 9.9 km | La Pesse | 20.0°C 2.2°C cooler | −4.2°C 1.9°C milder | 1,660 mm |
| Saint-Claude 10 km | Saint-Claude | 26.9°C 4.7°C warmer | −2.3°C 3.8°C milder | 1,869 mm |
| Gex 17 km | Saint-Claude | 26.9°C 4.7°C warmer | −2.3°C 3.8°C milder | 1,869 mm |
| Cessy 19 km | Archamps | 26.4°C 4.2°C warmer | −1.0°C 5.1°C milder | 1,170 mm |
| Divonne-les-Bains 19 km | Gaillard | 27.6°C 5.4°C warmer | −1.1°C 5°C milder | 967 mm |
Longchaumois weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Mouthe station; sunshine at Meythet.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 3.2°C | −6.1°C | −1.5°C | 151 mm | 88 |
| February | 4.4°C | −6.1°C | −0.8°C | 131 mm | 113 |
| March | 8.3°C | −2.9°C | 2.7°C | 132 mm | 174 |
| April | 12.1°C | −0.1°C | 6.0°C | 118 mm | 191 |
| May | 16.2°C | 4.0°C | 10.1°C | 142 mm | 220 |
| June | 20.0°C | 7.1°C | 13.6°C | 136 mm | 256 |
| July | 22.2°C | 8.9°C | 15.5°C | 130 mm | 274 |
| August | 22.0°C | 8.4°C | 15.2°C | 129 mm | 249 |
| September | 17.8°C | 5.3°C | 11.6°C | 119 mm | 195 |
| October | 13.7°C | 2.3°C | 8.0°C | 147 mm | 141 |
| November | 7.4°C | −2.0°C | 2.7°C | 158 mm | 91 |
| December | 3.6°C | −5.0°C | −0.7°C | 185 mm | 78 |
| Year | 12.6°C | 1.1°C | 6.9°C | 1,677 mm | 2,069 |
Where Longchaumois’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Mouthe, 34 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, Meythet, 61 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 Jura.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Longchaumois’s climate
How warm does Longchaumois get in summer?
July is the warmest month, with average highs of 22.2°C. About 29 days a year reach 25°C, fewer than 92% of mainland French towns, and about 3 reach 30°C.
How cold does Longchaumois get in winter?
January nights average −6.1°C. The air drops to 0°C or below on about 149 nights a year, and about 22 days a year stay below freezing all day.
How much rain does Longchaumois get?
About 1,677 mm a year, more than almost every mainland French town. December is the wettest month (185 mm) and April the driest (118 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Meythet (61 km away), averages 2,069 hours of sunshine a year.
Are these figures for Longchaumois itself?
No: they are the normals of the Météo-France station matched to Longchaumois, Mouthe, 34 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 MOUTHE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Longchaumois →
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.