Wet weather: 929 mm a year falls on Mérignac, more than on 82% of mainland French towns
On a normal January night the air cools to about 2.4°C. Rain peaks in November and eases off in July. By warm days alone, it ranks hotter than 74% of mainland French towns. Plan time outside for May, June, September and October, when highs sit at 19–25°C.
Figures from Météo-France’s Montlieu station, 12 km south.
A year in Mérignac at a glance
Each month’s typical high and low in °C, at the Montlieu station.
What a year in Mérignac feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Montlieu.
About 929 mm of rain a year
November is the wettest month and July the driest. About 29 days a year bring 10 mm or more. 3rd wettest of 54 towns of 2,500+ in Charente-Maritime.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Rioux-Martin
38 frosts and 83 days of 25°C a year
On about 38 nights a year the air drops to 0°C or below, and on about 1 days it stays below freezing all day. About 83 days a year reach 25°C, and 27 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Montlieu: 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 Montlieu
Montlieu is 12 km south of Mérignac. Every figure on this page is the station’s, not a measurement in Mérignac itself.
| Station (Météo-France number) | Montlieu (17243002) |
| Distance from the town | 12 km south |
| Station altitude | 89 m |
| Town altitude (its center) | 87 m |
| Period | 1991–2020 |
| Sunshine measured at | Rioux-Martin, 25 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 Mérignac 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 Charente-Maritime.
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 |
|---|---|---|---|---|
| Mérignac | Montlieu | 27.2°C | 2.4°C | 929 mm |
| Montendre 9 km | same station | 27.2°C about the same | 2.4°C about the same | 929 mm |
| Jonzac 17 km | Saint-Germain-de-Lusignan | 26.5°C 0.7°C cooler | 3.3°C 0.9°C milder | 931 mm |
| Barbezieux-Saint-Hilaire 20 km | Segonzac | 27.2°C about the same | 3.2°C 0.8°C milder | 818 mm |
| Saint-Yzan-de-Soudiac 22 km | same station | 27.2°C about the same | 2.4°C about the same | 929 mm |
| Saint-Savin 23 km | same station | 27.2°C about the same | 2.4°C about the same | 929 mm |
| Laruscade 24 km | Saint-Gervais | 27.1°C about the same | 3.5°C 1.1°C milder | 825 mm |
Mérignac weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Montlieu station; sunshine at Rioux-Martin.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.8°C | 2.4°C | 6.1°C | 90 mm | 82 |
| February | 11.4°C | 2.1°C | 6.7°C | 69 mm | 126 |
| March | 15.3°C | 4.3°C | 9.8°C | 69 mm | 173 |
| April | 18.0°C | 6.2°C | 12.1°C | 77 mm | 194 |
| May | 21.7°C | 9.7°C | 15.7°C | 69 mm | 222 |
| June | 25.1°C | 12.7°C | 18.9°C | 74 mm | 255 |
| July | 27.2°C | 13.9°C | 20.6°C | 50 mm | 270 |
| August | 27.7°C | 13.9°C | 20.8°C | 59 mm | 248 |
| September | 24.2°C | 11.4°C | 17.8°C | 76 mm | 214 |
| October | 19.4°C | 9.0°C | 14.2°C | 82 mm | 149 |
| November | 13.5°C | 5.1°C | 9.3°C | 107 mm | 102 |
| December | 10.4°C | 2.9°C | 6.6°C | 106 mm | 90 |
| Year | 18.6°C | 7.8°C | 13.2°C | 929 mm | 2,124 |
Where Mérignac’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Montlieu, 12 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, Rioux-Martin, 25 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 Charente-Maritime.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Mérignac’s climate
How warm does Mérignac get in summer?
August is the warmest month, with average highs of 27.7°C. About 83 days a year reach 25°C, more than 74% of mainland French towns, and about 27 reach 30°C.
How cold does Mérignac get in winter?
February nights average 2.1°C. The air drops to 0°C or below on about 38 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Mérignac get?
About 929 mm a year, more than 82% of mainland French towns. November is the wettest month (107 mm) and July the driest (50 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Rioux-Martin (25 km away), averages 2,124 hours of sunshine a year.
Are these figures for Mérignac itself?
No: they are the normals of the Météo-France station matched to Mérignac, Montlieu, 12 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 MONTLIEU_SAPC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Mérignac →
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.