Trèves gets more frosts than 86% of mainland French towns
Expect July afternoons of about 28.1°C. Of all months, October brings the most rain and February the least. By July afternoons alone, it runs hotter than 79% of mainland French towns. The heating season runs November to March: each of those months averages under 10°C.
Figures from Météo-France’s Mornant station, 8.6 km north.
A year in Trèves at a glance
Each month’s typical high and low in °C, at the Mornant station.
What a year in Trèves feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Mornant.
About 759 mm of rain a year
October is the wettest month and February the driest. About 22 days a year bring 10 mm or more. 99th wettest of 118 towns of 2,500+ in Rhône.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Lyon-Bron
A frosty town: 65 frosts and 87 days of 25°C a year
On about 65 nights a year the air drops to 0°C or below, and on about 6 days it stays below freezing all day. About 87 days a year reach 25°C, and 33 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Mornant: 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 Mornant
Mornant is 8.6 km north of Trèves. Every figure on this page is the station’s, not a measurement in Trèves itself.
| Station (Météo-France number) | Mornant (69141001) |
| Distance from the town | 8.6 km north |
| Station altitude | 343 m |
| Town altitude (its center) | 356 m |
| Period | 1991–2020 |
| Sunshine measured at | Lyon-Bron, 29 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 Trèves 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 Rhône.
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 |
|---|---|---|---|---|
| Trèves | Mornant | 28.1°C | 0.0°C | 759 mm |
| Rive-de-Gier 5.4 km | same station | 28.1°C about the same | 0.0°C about the same | 759 mm |
| Beauvallon 6 km | same station | 28.1°C about the same | 0.0°C about the same | 759 mm |
| Saint-Martin-la-Plaine 6.3 km | same station | 28.1°C about the same | 0.0°C about the same | 759 mm |
| Chabanière 6.9 km | same station | 28.1°C about the same | 0.0°C about the same | 759 mm |
| Genilac 7.8 km | same station | 28.1°C about the same | 0.0°C about the same | 759 mm |
| Lorette 8.1 km | same station | 28.1°C about the same | 0.0°C about the same | 759 mm |
Trèves weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Mornant station; sunshine at Lyon-Bron.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.0°C | 0.0°C | 3.5°C | 48 mm | 71 |
| February | 8.9°C | 0.2°C | 4.5°C | 35 mm | 102 |
| March | 13.8°C | 2.7°C | 8.2°C | 43 mm | 174 |
| April | 17.3°C | 5.3°C | 11.3°C | 60 mm | 198 |
| May | 21.3°C | 9.2°C | 15.2°C | 71 mm | 224 |
| June | 25.5°C | 12.8°C | 19.2°C | 70 mm | 257 |
| July | 28.1°C | 14.7°C | 21.4°C | 69 mm | 288 |
| August | 27.9°C | 14.4°C | 21.1°C | 62 mm | 263 |
| September | 23.0°C | 10.7°C | 16.8°C | 77 mm | 204 |
| October | 17.5°C | 7.7°C | 12.6°C | 87 mm | 131 |
| November | 11.2°C | 3.4°C | 7.3°C | 86 mm | 79 |
| December | 7.6°C | 0.7°C | 4.2°C | 50 mm | 59 |
| Year | 17.4°C | 6.8°C | 12.1°C | 759 mm | 2,050 |
Where Trèves’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Mornant, 8.6 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, 29 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 Rhône.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Trèves’s climate
How warm does Trèves get in summer?
July is the warmest month, with average highs of 28.1°C. About 87 days a year reach 25°C, more than 77% of mainland French towns, and about 33 reach 30°C.
How cold does Trèves get in winter?
January nights average 0.0°C. The air drops to 0°C or below on about 65 nights a year, and about 6 days a year stay below freezing all day.
How much rain does Trèves get?
About 759 mm a year, more than 51% of mainland French towns. October is the wettest month (87 mm) and February the driest (35 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Lyon-Bron (29 km away), averages 2,050 hours of sunshine a year.
Are these figures for Trèves itself?
No: they are the normals of the Météo-France station matched to Trèves, Mornant, 8.6 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 MORNANT, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Trèves →
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.