Copponex sits near the bottom of mainland French towns for winter warmth
Expect July afternoons of about 25.4°C. It is a wet place: more rain falls here than on 98% of mainland French towns. Temperatures cover 28°C across the year, low to high. Waterproofs come out on about 127 days a year, each with 1 mm of rain or more.
These are the figures of Météo-France’s Groisy station, 8.5 km south-east.
A year in Copponex at a glance
Each month’s typical high and low in °C, at the Groisy station.
What a year in Copponex 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 8.5 km south-east of Copponex. Every figure on this page is the station’s, not a measurement in Copponex itself.
| Station (Météo-France number) | Groisy (74137001) |
| Distance from the town | 8.5 km south-east |
| Station altitude | 670 m |
| Town altitude (its center) | 609 m |
| Period | 1991–2020 |
| Sunshine measured at | Meythet, 13 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 Copponex 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 |
|---|---|---|---|---|
| Copponex | Groisy | 25.4°C | −2.1°C | 1,373 mm |
| Cruseilles 3.1 km | same station | 25.4°C about the same | −2.1°C about the same | 1,373 mm |
| Beaumont 6.1 km | same station | 25.4°C about the same | −2.1°C about the same | 1,373 mm |
| Viry 8.5 km | Archamps | 26.4°C 1°C warmer | −1.0°C 1.1°C milder | 1,170 mm |
| Groisy 8.5 km | same station | 25.4°C about the same | −2.1°C about the same | 1,373 mm |
| La Balme-de-Sillingy 9.5 km | Meythet | 26.5°C 1.1°C warmer | −1.4°C 0.7°C milder | 1,211 mm |
| Saint-Julien-en-Genevois 11 km | Archamps | 26.4°C 1°C warmer | −1.0°C 1.1°C milder | 1,170 mm |
Copponex 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 Copponex’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Groisy, 8.5 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, 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 Haute-Savoie.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Copponex’s climate
How warm does Copponex 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 Copponex 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 Copponex 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 (13 km away), averages 2,069 hours of sunshine a year.
Are these figures for Copponex itself?
No: they are the normals of the Météo-France station matched to Copponex, Groisy, 8.5 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 Copponex →
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.