Dunes gets more days of 25 degrees or more than 93% of mainland French towns
Midwinter brings lows of about 2.6°C. The gap between a January night and a July afternoon is 27°C. By January nights alone, it runs milder than 64% of mainland French towns. Homes need heating from November to February, the months averaging under 10°C.
These are the figures of Météo-France’s Valence station, 8.6 km east.
A year in Dunes at a glance
Each month’s typical high and low in °C, at the Valence station.
What a year in Dunes feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Valence.
About 747 mm of rain a year
May is the wettest month and July the driest. About 22 days a year bring 10 mm or more. 3rd wettest of 17 towns of 2,500+ in Tarn-et-Garonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Agen-la Garenne
37 frosts and 112 days of 25°C a year
On about 37 nights a year the air drops to 0°C or below, and on about 1 days it stays below freezing all day. About 112 days a year reach 25°C, and 49 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Valence: 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 Valence
Valence is 8.6 km east of Dunes. Every figure on this page is the station’s, not a measurement in Dunes itself.
| Station (Météo-France number) | Valence (82186003) |
| Distance from the town | 8.6 km east |
| Station altitude | 64 m |
| Town altitude (its center) | 105 m |
| Period | 1994–2020 (the station’s own record) |
| Sunshine measured at | Agen-la Garenne, 17 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 Dunes 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 Tarn-et-Garonne.
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 |
|---|---|---|---|---|
| Dunes | Valence | 29.5°C | 2.6°C | 747 mm |
| Valence 9.9 km | same station | 29.5°C about the same | 2.6°C about the same | 747 mm |
| Layrac 10 km | Agen-la Garenne | 28.0°C 1.5°C cooler | 2.5°C about the same | 708 mm |
| Boé 14 km | Agen-la Garenne | 28.0°C 1.5°C cooler | 2.5°C about the same | 708 mm |
| Bon-Encontre 15 km | Agen-la Garenne | 28.0°C 1.5°C cooler | 2.5°C about the same | 708 mm |
| Agen 17 km | Agen-la Garenne | 28.0°C 1.5°C cooler | 2.5°C about the same | 708 mm |
| Pont-du-Casse 18 km | Agen-la Garenne | 28.0°C 1.5°C cooler | 2.5°C about the same | 708 mm |
Dunes weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Valence station; sunshine at Agen-la Garenne.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 10.1°C | 2.6°C | 6.4°C | 73 mm | 76 |
| February | 12.3°C | 2.3°C | 7.3°C | 52 mm | 113 |
| March | 16.4°C | 4.4°C | 10.4°C | 62 mm | 172 |
| April | 19.6°C | 7.1°C | 13.3°C | 68 mm | 186 |
| May | 23.1°C | 10.6°C | 16.9°C | 76 mm | 216 |
| June | 27.3°C | 14.1°C | 20.7°C | 63 mm | 235 |
| July | 29.5°C | 15.7°C | 22.6°C | 46 mm | 260 |
| August | 29.6°C | 15.5°C | 22.6°C | 47 mm | 250 |
| September | 26.2°C | 12.2°C | 19.2°C | 59 mm | 211 |
| October | 21.2°C | 9.8°C | 15.5°C | 59 mm | 143 |
| November | 14.2°C | 5.6°C | 9.9°C | 73 mm | 88 |
| December | 10.4°C | 3.0°C | 6.7°C | 70 mm | 72 |
| Year | 20.0°C | 8.6°C | 14.3°C | 747 mm | 2,020 |
Where Dunes’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Valence, 8.6 km away: statistics for 1991–2020 (the station’s own years, 1994–2020, where its record is shorter).
- 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, Agen-la Garenne, 17 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 Tarn-et-Garonne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Dunes’s climate
How warm does Dunes get in summer?
August is the warmest month, with average highs of 29.6°C. About 112 days a year reach 25°C, more than 93% of mainland French towns, and about 49 reach 30°C.
How cold does Dunes get in winter?
February nights average 2.3°C. The air drops to 0°C or below on about 37 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Dunes get?
About 747 mm a year, less than 52% of mainland French towns. May is the wettest month (76 mm) and July the driest (46 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Agen-la Garenne (17 km away), averages 2,020 hours of sunshine a year.
Are these figures for Dunes itself?
No: they are the normals of the Météo-France station matched to Dunes, Valence, 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 VALENCE, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Dunes →
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.