Saint-Sixt has some of the coldest winter nights among mainland French towns
Peak summer warmth arrives in July, with afternoons near 25.4°C. Winter and summer sit 28°C apart. It is a wet place: more rain falls here than on 98% of mainland French towns. Plan for rain on about 127 days a year, the days with 1 mm or more.
Figures from Météo-France’s Groisy station, 12 km west.
A year in Saint-Sixt at a glance
Each month’s typical high and low in °C, at the Groisy station.
What a year in Saint-Sixt feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Groisy.
About 1,373 mm of rain a year
December is the wettest month and February the driest. About 51 days a year bring 10 mm or more. 7th wettest of 69 towns of 2,500+ in Haute-Savoie.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Meythet
A frosty town: 93 frosts and 56 days of 25°C a year
On about 93 nights a year the air drops to 0°C or below, and on about 13 days it stays below freezing all day. About 56 days a year reach 25°C, and 12 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Groisy: 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 Groisy
Groisy is 12 km west of Saint-Sixt. Every figure on this page is the station’s, not a measurement in Saint-Sixt itself.
| Station (Météo-France number) | Groisy (74137001) |
| Distance from the town | 12 km west |
| Station altitude | 670 m |
| Town altitude (its center) | 766 m |
| Period | 1991–2020 |
| Nearest station of any kind | 6.6 km |
| Sunshine measured at | Meythet, 22 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 Saint-Sixt 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 Haute-Savoie.
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 |
|---|---|---|---|---|
| Saint-Sixt | Groisy | 25.4°C | −2.1°C | 1,373 mm |
| La Roche-sur-Foron 2.2 km | Archamps | 26.4°C 1°C warmer | −1.0°C 1.1°C milder | 1,170 mm |
| Amancy 3.3 km | Ayze | 27.5°C 2.1°C warmer | −2.4°C about the same | 1,193 mm |
| Saint-Pierre-en-Faucigny 4.6 km | Ayze | 27.5°C 2.1°C warmer | −2.4°C about the same | 1,193 mm |
| Bonneville 7.6 km | Ayze | 27.5°C 2.1°C warmer | −2.4°C about the same | 1,193 mm |
| Pers-Jussy 8.4 km | Archamps | 26.4°C 1°C warmer | −1.0°C 1.1°C milder | 1,170 mm |
| Fillière 11 km | same station | 25.4°C about the same | −2.1°C about the same | 1,373 mm |
Saint-Sixt weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Groisy station; sunshine at Meythet.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 4.6°C | −2.1°C | 1.2°C | 107 mm | 88 |
| February | 6.4°C | −1.8°C | 2.3°C | 91 mm | 113 |
| March | 11.1°C | 1.0°C | 6.0°C | 102 mm | 174 |
| April | 14.9°C | 3.6°C | 9.3°C | 108 mm | 191 |
| May | 19.2°C | 7.4°C | 13.3°C | 123 mm | 220 |
| June | 23.2°C | 10.9°C | 17.0°C | 115 mm | 256 |
| July | 25.4°C | 12.7°C | 19.0°C | 107 mm | 274 |
| August | 25.1°C | 12.6°C | 18.9°C | 110 mm | 249 |
| September | 20.3°C | 9.2°C | 14.8°C | 118 mm | 195 |
| October | 15.3°C | 6.0°C | 10.6°C | 126 mm | 141 |
| November | 9.0°C | 1.6°C | 5.3°C | 130 mm | 91 |
| December | 5.1°C | −1.3°C | 1.9°C | 134 mm | 78 |
| Year | 15.0°C | 5.0°C | 10.0°C | 1,373 mm | 2,069 |
Where Saint-Sixt’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Groisy, 12 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, Meythet, 22 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 Haute-Savoie.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Saint-Sixt’s climate
How warm does Saint-Sixt get in summer?
July is the warmest month, with average highs of 25.4°C. About 56 days a year reach 25°C, fewer than 59% of mainland French towns, and about 12 reach 30°C.
How cold does Saint-Sixt get in winter?
January nights average −2.1°C. The air drops to 0°C or below on about 93 nights a year, and about 13 days a year stay below freezing all day.
How much rain does Saint-Sixt get?
About 1,373 mm a year, more than 98% of mainland French towns. December is the wettest month (134 mm) and February the driest (91 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Meythet (22 km away), averages 2,069 hours of sunshine a year.
Are these figures for Saint-Sixt itself?
No: they are the normals of the Météo-France station matched to Saint-Sixt, Groisy, 12 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 GROISY_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Saint-Sixt →
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.