Few mainland French towns get more frosts than Chastel-Arnaud
High summer brings afternoon highs near 27.4°C. None of its 6 nearest neighbors gets more rain. Expect the heaviest rain in November and the lightest in July. An umbrella earns its place on about 95 days a year with 1 mm of rain or more.
Figures from Météo-France’s Saint-Nazaire-le-D station, 13 km south-east.
A year in Chastel-Arnaud at a glance
Each month’s typical high and low in °C, at the Saint-Nazaire-le-D station.
What a year in Chastel-Arnaud feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Nazaire-le-D.
About 1,012 mm of rain a year
November is the wettest month and July the driest. About 33 days a year bring 10 mm or more. 2nd wettest of 40 towns of 2,500+ in Drôme.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Montélimar
A frosty town: 103 frosts and 72 days of 25°C a year
On about 103 nights a year the air drops to 0°C or below, and on about 6 days it stays below freezing all day. About 72 days a year reach 25°C, and 26 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Nazaire-le-D: 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-Nazaire-le-D
Saint-Nazaire-le-D is 13 km south-east of Chastel-Arnaud. Every figure on this page is the station’s, not a measurement in Chastel-Arnaud itself.
| Station (Météo-France number) | Saint-Nazaire-le-D (26321003) |
| Distance from the town | 13 km south-east |
| Station altitude | 607 m |
| Town altitude (its center) | 762 m |
| Period | 1991–2020 |
| Nearest station of any kind | 9.7 km |
| Sunshine measured at | Montélimar, 38 km away |
Chastel-Arnaud sits 155 m higher than the station. Air usually cools by about 0.65°C every 100 m, so expect Chastel-Arnaud to run about 1°C cooler than these figures.
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 Chastel-Arnaud 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 Drôme.
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 |
|---|---|---|---|---|
| Chastel-Arnaud | Saint-Nazaire-le-D | 27.4°C | −2.4°C | 1,012 mm |
| Aouste-sur-Sye 13 km | Puy-Saint-Martin | 30.2°C 2.8°C warmer | 1.8°C 4.2°C milder | 923 mm |
| Crest 17 km | Puy-Saint-Martin | 30.2°C 2.8°C warmer | 1.8°C 4.2°C milder | 923 mm |
| Die 17 km | Die | 29.4°C 2°C warmer | −1.7°C 0.7°C milder | 939 mm |
| Dieulefit 18 km | Bourdeaux | 29.1°C 1.7°C warmer | −1.0°C 1.4°C milder | 953 mm |
| Allex 26 km | Étoile | 29.2°C 1.8°C warmer | 1.7°C 4.1°C milder | 905 mm |
| Montmeyran 27 km | Valence-Chabeui | 29.4°C 2°C warmer | 1.0°C 3.4°C milder | 874 mm |
Chastel-Arnaud weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Nazaire-le-D station; sunshine at Montélimar.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 7.1°C | −2.4°C | 2.4°C | 81 mm | 107 |
| February | 8.6°C | −2.6°C | 3.0°C | 56 mm | 136 |
| March | 12.6°C | −0.2°C | 6.2°C | 64 mm | 200 |
| April | 15.9°C | 2.8°C | 9.3°C | 94 mm | 219 |
| May | 20.2°C | 6.6°C | 13.4°C | 95 mm | 260 |
| June | 24.5°C | 9.8°C | 17.2°C | 59 mm | 300 |
| July | 27.4°C | 11.6°C | 19.5°C | 54 mm | 330 |
| August | 27.1°C | 11.4°C | 19.3°C | 60 mm | 299 |
| September | 22.0°C | 8.3°C | 15.1°C | 105 mm | 231 |
| October | 17.3°C | 5.6°C | 11.4°C | 120 mm | 156 |
| November | 11.2°C | 1.4°C | 6.3°C | 140 mm | 110 |
| December | 7.3°C | −1.7°C | 2.8°C | 83 mm | 95 |
| Year | 16.8°C | 4.2°C | 10.5°C | 1,012 mm | 2,441 |
Where Chastel-Arnaud’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Nazaire-le-D, 13 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, Montélimar, 38 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 Drôme.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Chastel-Arnaud’s climate
How warm does Chastel-Arnaud get in summer?
July is the warmest month, with average highs of 27.4°C. About 72 days a year reach 25°C, more than 66% of mainland French towns, and about 26 reach 30°C.
How cold does Chastel-Arnaud get in winter?
February nights average −2.6°C. The air drops to 0°C or below on about 103 nights a year, and about 6 days a year stay below freezing all day.
How much rain does Chastel-Arnaud get?
About 1,012 mm a year, more than 88% of mainland French towns. November is the wettest month (140 mm) and July the driest (54 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Montélimar (38 km away), averages 2,441 hours of sunshine a year.
Are these figures for Chastel-Arnaud itself?
No: they are the normals of the Météo-France station matched to Chastel-Arnaud, Saint-Nazaire-le-D, 13 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-NAZAIRE-LE-D, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Chastel-Arnaud →
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.