Summer afternoons in Saint-Prim are warmer than in 86% of mainland French towns
Deep winter brings January lows near 1.2°C. It is a wet place: more rain falls here than on 71% of mainland French towns. Of all months, October brings the most rain and February the least. Waterproofs come out on about 99 days a year, each with 1 mm of rain or more.
These are the figures of Météo-France’s Saint-Sorlin-en-Va station, 22 km south-east.
A year in Saint-Prim at a glance
Each month’s typical high and low in °C, at the Saint-Sorlin-en-Va station.
What a year in Saint-Prim feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Sorlin-en-Va.
About 855 mm of rain a year
October is the wettest month and February the driest. About 26 days a year bring 10 mm or more. 99th wettest of 110 towns of 2,500+ in Isère.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Lyon-Bron
43 frosts and 90 days of 25°C a year
On about 43 nights a year the air drops to 0°C or below, and on about 5 days it stays below freezing all day. About 90 days a year reach 25°C, and 34 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Sorlin-en-Va: 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-Sorlin-en-Va
Saint-Sorlin-en-Va is 22 km south-east of Saint-Prim. Every figure on this page is the station’s, not a measurement in Saint-Prim itself.
| Station (Météo-France number) | Saint-Sorlin-en-Va (26330001) |
| Distance from the town | 22 km south-east |
| Station altitude | 237 m |
| Town altitude (its center) | 242 m |
| Period | 1991–2020 |
| Nearest station of any kind | 4 km |
| Sunshine measured at | Lyon-Bron, 33 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-Prim 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, each with its own matched station.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Saint-Prim | Saint-Sorlin-en-Va | 28.6°C | 1.2°C | 855 mm |
| Saint-Clair-du-Rhône 1.5 km | Sablons | 30.2°C 1.6°C warmer | 0.7°C 0.5°C colder | 805 mm |
| Condrieu 3 km | Sablons | 30.2°C 1.6°C warmer | 0.7°C 0.5°C colder | 805 mm |
| Ampuis 5.6 km | Sablons | 30.2°C 1.6°C warmer | 0.7°C 0.5°C colder | 805 mm |
| Chavanay 5.7 km | Saint-Désirat Sa | 28.6°C about the same | 1.5°C about the same | 698 mm |
| Saint-Maurice-l'Exil 6.1 km | Sablons | 30.2°C 1.6°C warmer | 0.7°C 0.5°C colder | 805 mm |
| Le Péage-de-Roussillon 8 km | Sablons | 30.2°C 1.6°C warmer | 0.7°C 0.5°C colder | 805 mm |
Saint-Prim weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Sorlin-en-Va station; sunshine at Lyon-Bron.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.4°C | 1.2°C | 4.3°C | 56 mm | 71 |
| February | 9.2°C | 1.4°C | 5.3°C | 41 mm | 102 |
| March | 14.1°C | 4.2°C | 9.2°C | 49 mm | 174 |
| April | 17.8°C | 7.0°C | 12.4°C | 69 mm | 198 |
| May | 21.9°C | 10.8°C | 16.3°C | 80 mm | 224 |
| June | 26.1°C | 14.2°C | 20.1°C | 66 mm | 257 |
| July | 28.6°C | 15.9°C | 22.2°C | 63 mm | 288 |
| August | 28.4°C | 15.5°C | 21.9°C | 60 mm | 263 |
| September | 23.5°C | 12.1°C | 17.8°C | 92 mm | 204 |
| October | 18.1°C | 9.3°C | 13.7°C | 115 mm | 131 |
| November | 11.7°C | 4.8°C | 8.2°C | 108 mm | 79 |
| December | 7.8°C | 1.9°C | 4.9°C | 56 mm | 59 |
| Year | 17.9°C | 8.2°C | 13.0°C | 855 mm | 2,050 |
Where Saint-Prim’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Sorlin-en-Va, 22 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, Lyon-Bron, 33 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 Saint-Prim’s climate
How warm does Saint-Prim get in summer?
July is the warmest month, with average highs of 28.6°C. About 90 days a year reach 25°C, more than 82% of mainland French towns, and about 34 reach 30°C.
How cold does Saint-Prim get in winter?
January nights average 1.2°C. The air drops to 0°C or below on about 43 nights a year, and about 5 days a year stay below freezing all day.
How much rain does Saint-Prim get?
About 855 mm a year, more than 71% of mainland French towns. October is the wettest month (115 mm) and February the driest (41 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Lyon-Bron (33 km away), averages 2,050 hours of sunshine a year.
Are these figures for Saint-Prim itself?
No: they are the normals of the Météo-France station matched to Saint-Prim, Saint-Sorlin-en-Va, 22 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-SORLIN-EN-VA, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Saint-Prim →
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.