Nights turn raw in Gannat each January, colder than in 78% of mainland French towns
High summer brings afternoon highs near 26.9°C. Of all months, May brings the most rain and February the least. Of the 21 towns of 2,500+ in Allier, it is the driest. Picnics, hikes and garden evenings come into their own from May to October, with highs of 18–27°C.
These are the figures of Météo-France’s Charmes station, 4.8 km south-east.
A year in Gannat at a glance
Each month’s typical high and low in °C, at the Charmes station.
What a year in Gannat feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Charmes.
About 675 mm of rain a year
May is the wettest month and February the driest. About 19 days a year bring 10 mm or more. 21st wettest of 21 towns of 2,500+ in Allier.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Vichy-Charmeil
A frosty town: 50 frosts and 67 days of 25°C a year
On about 50 nights a year the air drops to 0°C or below, and on about 8 days it stays below freezing all day. About 67 days a year reach 25°C, and 23 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Charmes: 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 Charmes
Charmes is 4.8 km south-east of Gannat. Every figure on this page is the station’s, not a measurement in Gannat itself.
| Station (Météo-France number) | Charmes (03061001) |
| Distance from the town | 4.8 km south-east |
| Station altitude | 330 m |
| Town altitude (its center) | 342 m |
| Period | 1995–2020 (the station’s own record) |
| Sunshine measured at | Vichy-Charmeil, 17 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 Gannat 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 Allier.
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 |
|---|---|---|---|---|
| Gannat | Charmes | 26.9°C | 0.7°C | 675 mm |
| Aigueperse 8.2 km | same station | 26.9°C about the same | 0.7°C about the same | 675 mm |
| Bellerive-sur-Allier 16 km | Vichy-Ville | 27.6°C 0.7°C warmer | 1.6°C 0.9°C milder | 800 mm |
| Vichy 18 km | Vichy-Ville | 27.6°C 0.7°C warmer | 1.6°C 0.9°C milder | 800 mm |
| Abrest 19 km | Vichy-Ville | 27.6°C 0.7°C warmer | 1.6°C 0.9°C milder | 800 mm |
| Creuzier-le-Vieux 19 km | Vichy-Charmeil | 26.8°C about the same | 0.1°C 0.6°C colder | 769 mm |
| Cusset 20 km | Vichy-Ville | 27.6°C 0.7°C warmer | 1.6°C 0.9°C milder | 800 mm |
Gannat weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Charmes station; sunshine at Vichy-Charmeil.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.0°C | 0.7°C | 3.9°C | 39 mm | 72 |
| February | 8.5°C | 0.7°C | 4.6°C | 25 mm | 97 |
| March | 12.9°C | 3.1°C | 8.0°C | 39 mm | 156 |
| April | 16.3°C | 5.6°C | 11.0°C | 64 mm | 181 |
| May | 19.9°C | 9.1°C | 14.5°C | 79 mm | 204 |
| June | 24.3°C | 12.7°C | 18.5°C | 67 mm | 225 |
| July | 26.9°C | 14.4°C | 20.6°C | 69 mm | 254 |
| August | 26.6°C | 14.5°C | 20.5°C | 73 mm | 245 |
| September | 22.2°C | 11.1°C | 16.7°C | 57 mm | 190 |
| October | 17.5°C | 8.5°C | 13.0°C | 57 mm | 128 |
| November | 11.1°C | 4.0°C | 7.5°C | 61 mm | 80 |
| December | 7.5°C | 1.4°C | 4.5°C | 44 mm | 61 |
| Year | 16.7°C | 7.2°C | 11.9°C | 675 mm | 1,892 |
Where Gannat’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Charmes, 4.8 km away: statistics for 1991–2020 (the station’s own years, 1995–2020, where its record is shorter).
- 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, Vichy-Charmeil, 17 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 Allier.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Gannat’s climate
How warm does Gannat get in summer?
July is the warmest month, with average highs of 26.9°C. About 67 days a year reach 25°C, more than 59% of mainland French towns, and about 23 reach 30°C.
How cold does Gannat 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 8 days a year stay below freezing all day.
How much rain does Gannat get?
About 675 mm a year, less than 77% of mainland French towns. May is the wettest month (79 mm) and February the driest (25 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Vichy-Charmeil (17 km away), averages 1,892 hours of sunshine a year.
Are these figures for Gannat itself?
No: they are the normals of the Météo-France station matched to Gannat, Charmes, 4.8 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 CHARMES_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Gannat →
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.