More days reach 25 degrees in Giscos than in 80% of mainland French towns
Midwinter brings lows of about 2.6°C. Frost is rarer than in 76% of mainland French towns: about 30 nights a year drop below freezing. The gap between a January night and a July afternoon is 26°C. Picnics, hikes and garden evenings suit May, June, September and October, with highs of 20–25°C.
These are the figures of Météo-France’s Saint-Martin-Curto station, 19 km north-east.
A year in Giscos at a glance
Each month’s typical high and low in °C, at the Saint-Martin-Curto station.
What a year in Giscos feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Saint-Martin-Curto.
About 867 mm of rain a year
November is the wettest month and July the driest. About 27 days a year bring 10 mm or more. 77th wettest of 113 towns of 2,500+ in Gironde.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Mont-de-Marsan
30 frosts and 89 days of 25°C a year
On about 30 nights a year the air drops to 0°C or below, and on about 2 days it stays below freezing all day. About 89 days a year reach 25°C, and 30 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Saint-Martin-Curto: 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-Martin-Curto
Saint-Martin-Curto is 19 km north-east of Giscos. Every figure on this page is the station’s, not a measurement in Giscos itself.
| Station (Météo-France number) | Saint-Martin-Curto (47254001) |
| Distance from the town | 19 km north-east |
| Station altitude | 144 m |
| Town altitude (its center) | 103 m |
| Period | 1991–2020 |
| Sunshine measured at | Mont-de-Marsan, 48 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 Giscos 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 Gironde.
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 |
|---|---|---|---|---|
| Giscos | Saint-Martin-Curto | 27.8°C | 2.6°C | 867 mm |
| Bazas 18 km | Sauternes | 27.5°C about the same | 3.0°C about the same | 860 mm |
| Casteljaloux 21 km | same station | 27.8°C about the same | 2.6°C about the same | 867 mm |
Giscos weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Saint-Martin-Curto station; sunshine at Mont-de-Marsan.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.7°C | 2.6°C | 6.2°C | 82 mm | 89 |
| February | 11.5°C | 2.7°C | 7.1°C | 61 mm | 114 |
| March | 15.3°C | 5.0°C | 10.2°C | 65 mm | 165 |
| April | 18.0°C | 7.0°C | 12.5°C | 85 mm | 174 |
| May | 21.8°C | 10.4°C | 16.1°C | 83 mm | 196 |
| June | 25.4°C | 13.5°C | 19.4°C | 67 mm | 214 |
| July | 27.8°C | 15.2°C | 21.5°C | 48 mm | 233 |
| August | 28.1°C | 15.3°C | 21.7°C | 60 mm | 226 |
| September | 24.5°C | 12.4°C | 18.5°C | 65 mm | 199 |
| October | 19.6°C | 9.9°C | 14.8°C | 72 mm | 150 |
| November | 13.5°C | 5.7°C | 9.6°C | 94 mm | 97 |
| December | 10.2°C | 3.4°C | 6.8°C | 86 mm | 85 |
| Year | 18.8°C | 8.6°C | 13.7°C | 867 mm | 1,942 |
Where Giscos’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Saint-Martin-Curto, 19 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, Mont-de-Marsan, 48 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 Gironde.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Giscos’s climate
How warm does Giscos get in summer?
August is the warmest month, with average highs of 28.1°C. About 89 days a year reach 25°C, more than 80% of mainland French towns, and about 30 reach 30°C.
How cold does Giscos get in winter?
January nights average 2.6°C. The air drops to 0°C or below on about 30 nights a year, and about 2 days a year stay below freezing all day.
How much rain does Giscos get?
About 867 mm a year, more than 73% of mainland French towns. November is the wettest month (94 mm) and July the driest (48 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Mont-de-Marsan (48 km away), averages 1,942 hours of sunshine a year.
Are these figures for Giscos itself?
No: they are the normals of the Météo-France station matched to Giscos, Saint-Martin-Curto, 19 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 SAINT-MARTIN-CURTO, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Giscos →
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.