Grillon has warmer summer afternoons than 93% of mainland French towns
January mornings start at about 1.8°C. Frost is rarer than in 71% of mainland French towns: about 33 nights a year drop below freezing. Expect the heaviest rain in September and the lightest in July. Radiators earn their keep from November to February, the months that average under 10°C.
Figures from Météo-France’s Visan station, 6.5 km south.
A year in Grillon at a glance
Each month’s typical high and low in °C, at the Visan station.
What a year in Grillon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Visan.
About 773 mm of rain a year
September is the wettest month and July the driest. About 24 days a year bring 10 mm or more. 9th wettest of 47 towns of 2,500+ in Vaucluse.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Montélimar
33 frosts and 106 days of 25°C a year
On about 33 nights a year the air drops to 0°C or below, and on about 1 days it stays below freezing all day. About 106 days a year reach 25°C, and 47 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Visan: 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 Visan
Visan is 6.5 km south of Grillon. Every figure on this page is the station’s, not a measurement in Grillon itself.
| Station (Météo-France number) | Visan (84150001) |
| Distance from the town | 6.5 km south |
| Station altitude | 141 m |
| Town altitude (its center) | 176 m |
| Period | 1991–2020 |
| Sunshine measured at | Montélimar, 26 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 Grillon 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 Vaucluse.
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 |
|---|---|---|---|---|
| Grillon | Visan | 30.4°C | 1.8°C | 773 mm |
| Valréas 4.8 km | Taulignan | 30.3°C about the same | 1.9°C about the same | 842 mm |
| Saint-Paul-Trois-Châteaux 14 km | Pierrelatte | 30.3°C about the same | 2.3°C about the same | 795 mm |
| Nyons 16 km | Vinsobres | 30.0°C about the same | 2.5°C 0.7°C milder | 789 mm |
| Sainte-Cécile-les-Vignes 17 km | same station | 30.4°C about the same | 1.8°C about the same | 773 mm |
| Dieulefit 18 km | Bourdeaux | 29.1°C 1.3°C cooler | −1.0°C 2.8°C colder | 953 mm |
| Donzère 18 km | Donzère | 30.9°C 0.5°C warmer | 2.4°C 0.6°C milder | 826 mm |
Grillon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Visan station; sunshine at Montélimar.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.6°C | 1.8°C | 5.7°C | 57 mm | 107 |
| February | 11.1°C | 1.9°C | 6.5°C | 41 mm | 136 |
| March | 15.4°C | 4.7°C | 10.1°C | 45 mm | 200 |
| April | 18.7°C | 7.3°C | 13.0°C | 68 mm | 219 |
| May | 22.9°C | 11.1°C | 17.0°C | 65 mm | 260 |
| June | 27.2°C | 14.8°C | 21.0°C | 46 mm | 300 |
| July | 30.4°C | 17.1°C | 23.7°C | 40 mm | 330 |
| August | 30.0°C | 16.9°C | 23.5°C | 55 mm | 299 |
| September | 24.7°C | 13.3°C | 19.0°C | 108 mm | 231 |
| October | 19.5°C | 10.0°C | 14.8°C | 102 mm | 156 |
| November | 13.6°C | 5.6°C | 9.6°C | 99 mm | 110 |
| December | 10.2°C | 2.5°C | 6.4°C | 48 mm | 95 |
| Year | 19.4°C | 8.9°C | 14.2°C | 773 mm | 2,441 |
Where Grillon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Visan, 6.5 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, Montélimar, 26 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 Vaucluse.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Grillon’s climate
How warm does Grillon get in summer?
July is the warmest month, with average highs of 30.4°C. About 106 days a year reach 25°C, more than 90% of mainland French towns, and about 47 reach 30°C.
How cold does Grillon get in winter?
January nights average 1.8°C. The air drops to 0°C or below on about 33 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Grillon get?
About 773 mm a year, more than 54% of mainland French towns. September is the wettest month (108 mm) and July the driest (40 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Montélimar (26 km away), averages 2,441 hours of sunshine a year.
Are these figures for Grillon itself?
No: they are the normals of the Météo-France station matched to Grillon, Visan, 6.5 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 VISAN, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Grillon →
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.