Matafelon-Granges sits near the top of mainland French towns for rain, with 1,568 mm a year
January nights here settle around −1.5°C. By frosts alone, it ranks colder than 97% of mainland French towns. The seasons are far apart: from a winter night to a summer afternoon the average spans 27°C. Plan for rain on about 141 days a year, the days with 1 mm or more.
These are the figures of Météo-France’s Cernon station, 18 km north-east.
A year in Matafelon-Granges at a glance
Each month’s typical high and low in °C, at the Cernon station.
What a year in Matafelon-Granges feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Cernon.
About 1,568 mm of rain a year
December is the wettest month and July the driest. About 56 days a year bring 10 mm or more. 5th wettest of 60 towns of 2,500+ in Ain.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Amberieu
A frosty town: 86 frosts and 57 days of 25°C a year
On about 86 nights a year the air drops to 0°C or below, and on about 9 days it stays below freezing all day. About 57 days a year reach 25°C, and 16 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Cernon: 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 Cernon
Cernon is 18 km north-east of Matafelon-Granges. Every figure on this page is the station’s, not a measurement in Matafelon-Granges itself.
| Station (Météo-France number) | Cernon (39086001) |
| Distance from the town | 18 km north-east |
| Station altitude | 500 m |
| Town altitude (its center) | 484 m |
| Period | 1991–2020 |
| Nearest station of any kind | 9.5 km |
| Sunshine measured at | Amberieu, 35 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 Matafelon-Granges 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 Ain.
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 |
|---|---|---|---|---|
| Matafelon-Granges | Cernon | 25.4°C | −1.5°C | 1,568 mm |
| Bellignat 6.5 km | same station | 25.4°C about the same | −1.5°C about the same | 1,568 mm |
| Oyonnax 7.6 km | same station | 25.4°C about the same | −1.5°C about the same | 1,568 mm |
| Montréal-la-Cluse 8.6 km | Vieu | 24.7°C 0.7°C cooler | −2.8°C 1.3°C colder | 1,610 mm |
| Arbent 10 km | same station | 25.4°C about the same | −1.5°C about the same | 1,568 mm |
| Nantua 12 km | Vieu | 24.7°C 0.7°C cooler | −2.8°C 1.3°C colder | 1,610 mm |
| Ceyzériat 19 km | Ceyzériat | 26.6°C 1.2°C warmer | 0.1°C 1.6°C milder | 1,033 mm |
Matafelon-Granges weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Cernon station; sunshine at Amberieu.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 5.7°C | −1.5°C | 2.1°C | 136 mm | 68 |
| February | 7.4°C | −1.7°C | 2.9°C | 119 mm | 98 |
| March | 11.8°C | 0.9°C | 6.4°C | 120 mm | 170 |
| April | 15.5°C | 3.7°C | 9.6°C | 122 mm | 194 |
| May | 19.2°C | 7.8°C | 13.5°C | 138 mm | 220 |
| June | 23.1°C | 11.3°C | 17.2°C | 113 mm | 252 |
| July | 25.4°C | 13.1°C | 19.2°C | 112 mm | 288 |
| August | 25.3°C | 12.9°C | 19.1°C | 115 mm | 261 |
| September | 20.9°C | 9.5°C | 15.2°C | 116 mm | 189 |
| October | 16.3°C | 6.5°C | 11.4°C | 149 mm | 122 |
| November | 10.0°C | 2.1°C | 6.1°C | 162 mm | 73 |
| December | 6.1°C | −0.7°C | 2.7°C | 165 mm | 55 |
| Year | 15.6°C | 5.3°C | 10.4°C | 1,568 mm | 1,989 |
Where Matafelon-Granges’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Cernon, 18 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, Amberieu, 35 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 Ain.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Matafelon-Granges’s climate
How warm does Matafelon-Granges get in summer?
July is the warmest month, with average highs of 25.4°C. About 57 days a year reach 25°C, fewer than 58% of mainland French towns, and about 16 reach 30°C.
How cold does Matafelon-Granges get in winter?
February nights average −1.7°C. The air drops to 0°C or below on about 86 nights a year, and about 9 days a year stay below freezing all day.
How much rain does Matafelon-Granges get?
About 1,568 mm a year, more than almost every mainland French town. December is the wettest month (165 mm) and July the driest (112 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Amberieu (35 km away), averages 1,989 hours of sunshine a year.
Are these figures for Matafelon-Granges itself?
No: they are the normals of the Météo-France station matched to Matafelon-Granges, Cernon, 18 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 CERNON, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Matafelon-Granges →
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.