Mérignat is among the wettest of mainland French towns: 1,610 mm of rain a year
On a normal January night the air cools to about −2.8°C. Wet weather is most frequent in December and least in August. Frosty nights outnumber those of almost every mainland French town. Warm coats and heating bills mark the months from November to April, when means dip under 10°C.
These are the figures of Météo-France’s Vieu station, 8.7 km east.
A year in Mérignat at a glance
Each month’s typical high and low in °C, at the Vieu station.
What a year in Mérignat feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Vieu.
About 1,610 mm of rain a year
December is the wettest month and August the driest. About 56 days a year bring 10 mm or more. 3rd wettest of 60 towns of 2,500+ in Ain.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Amberieu
A frosty town: 107 frosts and 48 days of 25°C a year
On about 107 nights a year the air drops to 0°C or below, and on about 12 days it stays below freezing all day. About 48 days a year reach 25°C, and 10 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Vieu: 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 Vieu
Vieu is 8.7 km east of Mérignat. Every figure on this page is the station’s, not a measurement in Mérignat itself.
| Station (Météo-France number) | Vieu (01441001) |
| Distance from the town | 8.7 km east |
| Station altitude | 616 m |
| Town altitude (its center) | 441 m |
| Period | 1991–2020 |
| Sunshine measured at | Amberieu, 13 km away |
Mérignat sits 175 m lower than the station. Air usually warms by about 0.65°C every 100 m you go down, so expect Mérignat to run about 1.1°C warmer than these figures.
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 Mérignat 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 |
|---|---|---|---|---|
| Mérignat | Vieu | 24.7°C | −2.8°C | 1,610 mm |
| Pont-d'Ain 7.5 km | Amberieu | 27.5°C 2.8°C warmer | −0.1°C 2.7°C milder | 1,118 mm |
| Ambronay 9.6 km | Amberieu | 27.5°C 2.8°C warmer | −0.1°C 2.7°C milder | 1,118 mm |
| Ambérieu-en-Bugey 14 km | Amberieu | 27.5°C 2.8°C warmer | −0.1°C 2.7°C milder | 1,118 mm |
| Ceyzériat 15 km | Ceyzériat | 26.6°C 1.9°C warmer | 0.1°C 2.9°C milder | 1,033 mm |
| Nantua 16 km | same station | 24.7°C about the same | −2.8°C about the same | 1,610 mm |
| Montréal-la-Cluse 16 km | same station | 24.7°C about the same | −2.8°C about the same | 1,610 mm |
Mérignat weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Vieu station; sunshine at Amberieu.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 5.5°C | −2.8°C | 1.4°C | 143 mm | 68 |
| February | 6.7°C | −3.0°C | 1.8°C | 122 mm | 98 |
| March | 10.9°C | −0.5°C | 5.2°C | 125 mm | 170 |
| April | 14.5°C | 2.1°C | 8.3°C | 126 mm | 194 |
| May | 18.5°C | 6.2°C | 12.3°C | 138 mm | 220 |
| June | 22.4°C | 9.5°C | 16.0°C | 115 mm | 252 |
| July | 24.7°C | 11.4°C | 18.1°C | 124 mm | 288 |
| August | 24.6°C | 11.2°C | 17.9°C | 106 mm | 261 |
| September | 20.0°C | 8.0°C | 14.0°C | 127 mm | 189 |
| October | 15.5°C | 5.4°C | 10.4°C | 153 mm | 122 |
| November | 9.6°C | 1.0°C | 5.3°C | 165 mm | 73 |
| December | 6.3°C | −1.8°C | 2.2°C | 166 mm | 55 |
| Year | 14.9°C | 3.9°C | 9.4°C | 1,610 mm | 1,989 |
Where Mérignat’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Vieu, 8.7 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, 13 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 Mérignat’s climate
How warm does Mérignat get in summer?
July is the warmest month, with average highs of 24.7°C. About 48 days a year reach 25°C, fewer than 71% of mainland French towns, and about 10 reach 30°C.
How cold does Mérignat get in winter?
February nights average −3.0°C. The air drops to 0°C or below on about 107 nights a year, and about 12 days a year stay below freezing all day.
How much rain does Mérignat get?
About 1,610 mm a year, more than almost every mainland French town. December is the wettest month (166 mm) and August the driest (106 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Amberieu (13 km away), averages 1,989 hours of sunshine a year.
Are these figures for Mérignat itself?
No: they are the normals of the Météo-France station matched to Mérignat, Vieu, 8.7 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 VIEU, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Mérignat →
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.