Winter nights in Chalamont are colder than in 80% of mainland French towns
Météo-France’s Marlieux station, 11 km north-west: January nights average 0.5°C, July afternoons 27.8°C, and a year brings 909 mm of rain. It is a wet place: more rain falls here than on 78% of mainland French towns. Summers, though, are warm: afternoons in July are warmer than in 76% of mainland French towns.
A year in Chalamont at a glance
Each month’s typical high and low in °C, at the Marlieux station.
What a year in Chalamont feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Marlieux.
About 909 mm of rain a year
October is the wettest month and February the driest. About 28 days a year bring 10 mm or more. 35th wettest of 60 towns of 2,500+ in Ain.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Amberieu
A frosty town: 55 frosts and 81 days of 25°C a year
On about 55 nights a year the air drops to 0°C or below, and on about 9 days it stays below freezing all day. About 81 days a year reach 25°C, and 29 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Marlieux: 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 Marlieux
Marlieux is 11 km north-west of Chalamont. Every figure on this page is the station’s, not a measurement in Chalamont itself.
| Station (Météo-France number) | Marlieux (01235001) |
| Distance from the town | 11 km north-west |
| Station altitude | 277 m |
| Town altitude (its center) | 294 m |
| Period | 1991–2020 |
| Sunshine measured at | Amberieu, 12 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 Chalamont 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 |
|---|---|---|---|---|
| Chalamont | Marlieux | 27.8°C | 0.5°C | 909 mm |
| Villieu-Loyes-Mollon 9.1 km | Amberieu | 27.5°C about the same | −0.1°C 0.6°C colder | 1,118 mm |
| Meximieux 9.9 km | Amberieu | 27.5°C about the same | −0.1°C 0.6°C colder | 1,118 mm |
| Villars-les-Dombes 11 km | same station | 27.8°C about the same | 0.5°C about the same | 909 mm |
| Ambronay 14 km | Amberieu | 27.5°C about the same | −0.1°C 0.6°C colder | 1,118 mm |
| Ambérieu-en-Bugey 15 km | Amberieu | 27.5°C about the same | −0.1°C 0.6°C colder | 1,118 mm |
| Pont-d'Ain 15 km | Amberieu | 27.5°C about the same | −0.1°C 0.6°C colder | 1,118 mm |
Chalamont weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Marlieux station; sunshine at Amberieu.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.2°C | 0.5°C | 3.4°C | 62 mm | 68 |
| February | 8.1°C | 0.6°C | 4.4°C | 53 mm | 98 |
| March | 13.1°C | 3.2°C | 8.2°C | 56 mm | 170 |
| April | 16.8°C | 5.9°C | 11.4°C | 75 mm | 194 |
| May | 21.1°C | 9.9°C | 15.5°C | 83 mm | 220 |
| June | 25.3°C | 13.2°C | 19.3°C | 77 mm | 252 |
| July | 27.8°C | 14.8°C | 21.3°C | 81 mm | 288 |
| August | 27.7°C | 14.4°C | 21.1°C | 71 mm | 261 |
| September | 22.8°C | 11.1°C | 17.0°C | 86 mm | 189 |
| October | 17.2°C | 8.4°C | 12.8°C | 103 mm | 122 |
| November | 10.6°C | 4.0°C | 7.3°C | 96 mm | 73 |
| December | 6.8°C | 1.4°C | 4.1°C | 67 mm | 55 |
| Year | 17.0°C | 7.3°C | 12.2°C | 909 mm | 1,989 |
Where Chalamont’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Marlieux, 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, Amberieu, 12 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 Chalamont’s climate
How warm does Chalamont get in summer?
July is the warmest month, with average highs of 27.8°C. About 81 days a year reach 25°C, more than 72% of mainland French towns, and about 29 reach 30°C.
How cold does Chalamont get in winter?
January nights average 0.5°C. The air drops to 0°C or below on about 55 nights a year, and about 9 days a year stay below freezing all day.
How much rain does Chalamont get?
About 909 mm a year, more than 78% of mainland French towns. October is the wettest month (103 mm) and February the driest (53 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Amberieu (12 km away), averages 1,989 hours of sunshine a year.
Are these figures for Chalamont itself?
No: they are the normals of the Météo-France station matched to Chalamont, Marlieux, 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 MARLIEUX, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Chalamont →
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.