Castelnau-de-Médoc is wetter than 87% of mainland French towns: 1,007 mm of rain a year
The warmest part of a July day comes in at 27.0°C on average. Expect the heaviest rain in November and the lightest in July. Warm days come often: about 89 a year reach 25°C, more than in 80% of mainland French towns. Comfortable outdoor weather lasts from May to July and September to October, with highs of 20–27°C.
Figures from Météo-France’s Salaunes station, 10 km south.
A year in Castelnau-de-Médoc at a glance
Each month’s typical high and low in °C, at the Salaunes station.
What a year in Castelnau-de-Médoc feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Salaunes.
About 1,007 mm of rain a year
November is the wettest month and July the driest. About 34 days a year bring 10 mm or more. 2nd wettest of 113 towns of 2,500+ in Gironde.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Pauillac
46 frosts and 89 days of 25°C a year
On about 46 nights a year the air drops to 0°C or below, and on about under 1 days it stays below freezing all day. About 89 days a year reach 25°C, and 27 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Salaunes: 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 Salaunes
Salaunes is 10 km south of Castelnau-de-Médoc. Every figure on this page is the station’s, not a measurement in Castelnau-de-Médoc itself.
| Station (Météo-France number) | Salaunes (33494001) |
| Distance from the town | 10 km south |
| Station altitude | 50 m |
| Town altitude (its center) | 21 m |
| Period | 1991–2020 |
| Sunshine measured at | Pauillac, 21 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 Castelnau-de-Médoc 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 |
|---|---|---|---|---|
| Castelnau-de-Médoc | Salaunes | 27.0°C | 2.4°C | 1,007 mm |
| Avensan 3.4 km | same station | 27.0°C about the same | 2.4°C about the same | 1,007 mm |
| Listrac-Médoc 5.5 km | Pauillac | 26.7°C about the same | 4.0°C 1.6°C milder | 857 mm |
| Arsac 9.1 km | same station | 27.0°C about the same | 2.4°C about the same | 1,007 mm |
| Margaux-Cantenac 9.2 km | same station | 27.0°C about the same | 2.4°C about the same | 1,007 mm |
| Sainte-Hélène 9.6 km | same station | 27.0°C about the same | 2.4°C about the same | 1,007 mm |
| Saint-Laurent-Médoc 13 km | Pauillac | 26.7°C about the same | 4.0°C 1.6°C milder | 857 mm |
Castelnau-de-Médoc weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Salaunes station; sunshine at Pauillac.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 10.8°C | 2.4°C | 6.5°C | 104 mm | 84 |
| February | 12.1°C | 1.9°C | 6.9°C | 81 mm | 126 |
| March | 15.7°C | 4.1°C | 9.9°C | 72 mm | 171 |
| April | 18.1°C | 6.0°C | 12.0°C | 78 mm | 205 |
| May | 21.8°C | 9.7°C | 15.8°C | 75 mm | 232 |
| June | 24.9°C | 12.9°C | 18.9°C | 72 mm | 251 |
| July | 27.0°C | 14.5°C | 20.7°C | 48 mm | 273 |
| August | 27.4°C | 14.2°C | 20.8°C | 59 mm | 255 |
| September | 24.2°C | 11.2°C | 17.7°C | 79 mm | 223 |
| October | 19.8°C | 9.0°C | 14.4°C | 90 mm | 158 |
| November | 14.3°C | 5.1°C | 9.7°C | 127 mm | 106 |
| December | 11.2°C | 2.6°C | 6.8°C | 123 mm | 92 |
| Year | 18.9°C | 7.8°C | 13.3°C | 1,007 mm | 2,175 |
Where Castelnau-de-Médoc’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Salaunes, 10 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, Pauillac, 21 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 Castelnau-de-Médoc’s climate
How warm does Castelnau-de-Médoc get in summer?
August is the warmest month, with average highs of 27.4°C. About 89 days a year reach 25°C, more than 80% of mainland French towns, and about 27 reach 30°C.
How cold does Castelnau-de-Médoc get in winter?
February nights average 1.9°C. The air drops to 0°C or below on about 46 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Castelnau-de-Médoc get?
About 1,007 mm a year, more than 87% of mainland French towns. November is the wettest month (127 mm) and July the driest (48 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Pauillac (21 km away), averages 2,175 hours of sunshine a year.
Are these figures for Castelnau-de-Médoc itself?
No: they are the normals of the Météo-France station matched to Castelnau-de-Médoc, Salaunes, 10 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 SALAUNES, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Castelnau-de-Médoc →
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.