Vertrieu is wetter than 92% of mainland French towns: 1,118 mm of rain a year
January nights here settle around −0.1°C. Frost is common: about 65 nights a year drop below freezing, more than in 87% of mainland French towns. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 28°C apart. For walks and days out, May, June, September and October bring highs of 17–25°C.
These are the figures of Météo-France’s Amberieu station, 12 km north.
A year in Vertrieu at a glance
Each month’s typical high and low in °C, at the Amberieu station.
What a year in Vertrieu feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Amberieu.
About 1,118 mm of rain a year
November is the wettest month and February the driest. About 36 days a year bring 10 mm or more. 43rd wettest of 110 towns of 2,500+ in Isère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Amberieu
A frosty town: 65 frosts and 76 days of 25°C a year
On about 65 nights a year the air drops to 0°C or below, and on about 8 days it stays below freezing all day. About 76 days a year reach 25°C, and 26 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Amberieu: 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 Amberieu
Amberieu is 12 km north of Vertrieu. Every figure on this page is the station’s, not a measurement in Vertrieu itself.
| Station (Météo-France number) | Amberieu (01089001) |
| Distance from the town | 12 km north |
| Station altitude | 250 m |
| Town altitude (its center) | 208 m |
| Period | 1991–2020 |
| Nearest station of any kind | 8 km |
| Sunshine measured at | the same station |
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 Vertrieu 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 Isère.
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 |
|---|---|---|---|---|
| Vertrieu | Amberieu | 27.5°C | −0.1°C | 1,118 mm |
| Lagnieu 3.2 km | same station | 27.5°C about the same | −0.1°C about the same | 1,118 mm |
| Montalieu-Vercieu 7.5 km | Saint-Rambert-en-Bugey | 27.6°C about the same | −0.7°C 0.6°C colder | 1,512 mm |
| Ambérieu-en-Bugey 9.4 km | same station | 27.5°C about the same | −0.1°C about the same | 1,118 mm |
| Villieu-Loyes-Mollon 12 km | same station | 27.5°C about the same | −0.1°C about the same | 1,118 mm |
| Meximieux 14 km | same station | 27.5°C about the same | −0.1°C about the same | 1,118 mm |
| Ambronay 15 km | same station | 27.5°C about the same | −0.1°C about the same | 1,118 mm |
Vertrieu weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Amberieu station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 6.5°C | −0.1°C | 3.2°C | 85 mm | 68 |
| February | 8.4°C | 0.0°C | 4.2°C | 70 mm | 98 |
| March | 13.5°C | 2.6°C | 8.0°C | 75 mm | 170 |
| April | 17.1°C | 5.5°C | 11.3°C | 87 mm | 194 |
| May | 20.9°C | 9.5°C | 15.2°C | 106 mm | 220 |
| June | 25.0°C | 13.0°C | 19.0°C | 89 mm | 252 |
| July | 27.5°C | 14.7°C | 21.1°C | 86 mm | 288 |
| August | 27.3°C | 14.4°C | 20.9°C | 83 mm | 261 |
| September | 22.4°C | 10.9°C | 16.7°C | 106 mm | 189 |
| October | 17.1°C | 8.1°C | 12.6°C | 118 mm | 122 |
| November | 10.8°C | 3.5°C | 7.1°C | 118 mm | 73 |
| December | 7.0°C | 0.8°C | 3.9°C | 95 mm | 55 |
| Year | 17.0°C | 6.9°C | 11.9°C | 1,118 mm | 1,989 |
Where Vertrieu’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Amberieu, 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, Amberieu, 12 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 Isère.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Vertrieu’s climate
How warm does Vertrieu get in summer?
July is the warmest month, with average highs of 27.5°C. About 76 days a year reach 25°C, more than 69% of mainland French towns, and about 26 reach 30°C.
How cold does Vertrieu get in winter?
January nights average −0.1°C. The air drops to 0°C or below on about 65 nights a year, and about 8 days a year stay below freezing all day.
How much rain does Vertrieu get?
About 1,118 mm a year, more than 92% of mainland French towns. November is the wettest month (118 mm) and February the driest (70 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Amberieu (12 km away), averages 1,989 hours of sunshine a year.
Are these figures for Vertrieu itself?
No: they are the normals of the Météo-France station matched to Vertrieu, Amberieu, 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 AMBERIEU, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Vertrieu →
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.