La Guillermie is among the frostiest of mainland French towns
Peak summer warmth arrives in July, with afternoons near 25.2°C. By rainfall alone, it ranks wetter than 76% of mainland French towns. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 27°C apart. The outdoor season runs from June to August, with highs of 23–25°C.
Figures from Météo-France’s Saint-Just-en-Chev station, 18 km south-east.
A year in La Guillermie at a glance
Each month’s typical high and low in °C, at the Saint-Just-en-Chev station.
What a year in La Guillermie feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Just-en-Chev.
About 885 mm of rain a year
August is the wettest month and March the driest. About 26 days a year bring 10 mm or more. 2nd wettest of 21 towns of 2,500+ in Allier.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Saint-Nicolas
A frosty town: 102 frosts and 53 days of 25°C a year
On about 102 nights a year the air drops to 0°C or below, and on about 9 days it stays below freezing all day. About 53 days a year reach 25°C, and 14 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Just-en-Chev: 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 Saint-Just-en-Chev
Saint-Just-en-Chev is 18 km south-east of La Guillermie. Every figure on this page is the station’s, not a measurement in La Guillermie itself.
| Station (Météo-France number) | Saint-Just-en-Chev (42248002) |
| Distance from the town | 18 km south-east |
| Station altitude | 612 m |
| Town altitude (its center) | 703 m |
| Period | 1993–2020 (the station’s own record) |
| Nearest station of any kind | 11 km |
| Sunshine measured at | Saint-Nicolas, 15 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 La Guillermie 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, each with its own matched station.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| La Guillermie | Saint-Just-en-Chev | 25.2°C | −2.1°C | 885 mm |
| Puy-Guillaume 12 km | Vichy-Ville | 27.6°C 2.4°C warmer | 1.6°C 3.7°C milder | 800 mm |
| Thiers 16 km | Clermont-Fd | 26.8°C 1.6°C warmer | 0.6°C 2.7°C milder | 563 mm |
| Saint-Yorre 16 km | Vichy-Ville | 27.6°C 2.4°C warmer | 1.6°C 3.7°C milder | 800 mm |
| Abrest 19 km | Vichy-Ville | 27.6°C 2.4°C warmer | 1.6°C 3.7°C milder | 800 mm |
| Cusset 22 km | Vichy-Ville | 27.6°C 2.4°C warmer | 1.6°C 3.7°C milder | 800 mm |
| Vichy 23 km | Vichy-Ville | 27.6°C 2.4°C warmer | 1.6°C 3.7°C milder | 800 mm |
La Guillermie weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Just-en-Chev station; sunshine at Saint-Nicolas.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.5°C | −2.1°C | 2.2°C | 73 mm | 76 |
| February | 7.6°C | −2.1°C | 2.8°C | 62 mm | 100 |
| March | 11.6°C | −0.1°C | 5.7°C | 60 mm | 148 |
| April | 14.8°C | 2.3°C | 8.6°C | 66 mm | 177 |
| May | 18.8°C | 6.0°C | 12.4°C | 83 mm | 185 |
| June | 23.0°C | 9.4°C | 16.2°C | 68 mm | 222 |
| July | 25.2°C | 11.1°C | 18.2°C | 84 mm | 255 |
| August | 25.1°C | 10.7°C | 17.9°C | 86 mm | 221 |
| September | 20.6°C | 7.2°C | 13.9°C | 68 mm | 173 |
| October | 16.3°C | 4.8°C | 10.6°C | 75 mm | 133 |
| November | 10.4°C | 1.1°C | 5.7°C | 84 mm | 81 |
| December | 7.1°C | −1.5°C | 2.8°C | 77 mm | 69 |
| Year | 15.6°C | 3.9°C | 9.8°C | 885 mm | 1,839 |
Where La Guillermie’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Just-en-Chev, 18 km away: statistics for 1991–2020 (the station’s own years, 1993–2020, 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, Saint-Nicolas, 15 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 La Guillermie’s climate
How warm does La Guillermie get in summer?
July is the warmest month, with average highs of 25.2°C. About 53 days a year reach 25°C, fewer than 65% of mainland French towns, and about 14 reach 30°C.
How cold does La Guillermie get in winter?
January nights average −2.1°C. The air drops to 0°C or below on about 102 nights a year, and about 9 days a year stay below freezing all day.
How much rain does La Guillermie get?
About 885 mm a year, more than 76% of mainland French towns. August is the wettest month (86 mm) and March the driest (60 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Nicolas (15 km away), averages 1,839 hours of sunshine a year.
Are these figures for La Guillermie itself?
No: they are the normals of the Météo-France station matched to La Guillermie, Saint-Just-en-Chev, 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 ST-JUST-EN-CHEV, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for La Guillermie →
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.