Nights stay kind in Mérignac each January, milder than in 77% of mainland French towns
High summer brings afternoon highs near 27.2°C. About 80 days a year reach 25°C, more than in 71% of mainland French towns. Only 25°C separates winter nights from summer afternoons. Gritters and ice scrapers earn their keep on roughly 30 nights a year below 0°C.
Figures from Météo-France’s Segonzac station, 14 km south-west.
A year in Mérignac at a glance
Each month’s typical high and low in °C, at the Segonzac 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 Segonzac.
About 818 mm of rain a year
November is the wettest month and July the driest. About 27 days a year bring 10 mm or more. 22nd wettest of 26 towns of 2,500+ in Charente.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Cognac
30 frosts and 80 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 80 days a year reach 25°C, and 24 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Segonzac: 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 Segonzac
Segonzac is 14 km south-west of Mérignac. Every figure on this page is the station’s, not a measurement in Mérignac itself.
| Station (Météo-France number) | Segonzac (16366001) |
| Distance from the town | 14 km south-west |
| Station altitude | 62 m |
| Town altitude (its center) | 42 m |
| Period | 1991–2020 |
| Sunshine measured at | Cognac, 19 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.
Nearby towns’ climate
The nearest towns of 2,500+ within 29 km, each with its own matched station.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Mérignac | Segonzac | 27.2°C | 3.2°C | 818 mm |
| Jarnac 7.6 km | Cognac | 27.0°C about the same | 3.3°C about the same | 772 mm |
| Rouillac 10 km | Tusson | 27.3°C about the same | 2.0°C 1.2°C colder | 822 mm |
| Châteauneuf-sur-Charente 11 km | La Couronne | 27.5°C about the same | 2.8°C about the same | 845 mm |
| Fléac 13 km | La Couronne | 27.5°C about the same | 2.8°C about the same | 845 mm |
| Roullet-Saint-Estèphe 15 km | La Couronne | 27.5°C about the same | 2.8°C about the same | 845 mm |
| Saint-Michel 16 km | La Couronne | 27.5°C about the same | 2.8°C about the same | 845 mm |
Mérignac weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Segonzac station; sunshine at Cognac.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.5°C | 3.2°C | 6.4°C | 78 mm | 82 |
| February | 11.1°C | 2.9°C | 7.0°C | 57 mm | 116 |
| March | 14.8°C | 5.1°C | 10.0°C | 55 mm | 166 |
| April | 17.7°C | 7.1°C | 12.4°C | 62 mm | 187 |
| May | 21.6°C | 10.5°C | 16.1°C | 60 mm | 221 |
| June | 25.0°C | 13.4°C | 19.2°C | 62 mm | 237 |
| July | 27.2°C | 14.9°C | 21.1°C | 52 mm | 257 |
| August | 27.4°C | 14.8°C | 21.1°C | 55 mm | 250 |
| September | 23.8°C | 12.0°C | 17.9°C | 67 mm | 204 |
| October | 19.0°C | 9.8°C | 14.4°C | 83 mm | 141 |
| November | 13.3°C | 6.0°C | 9.7°C | 95 mm | 97 |
| December | 10.2°C | 3.7°C | 6.9°C | 93 mm | 85 |
| Year | 18.4°C | 8.6°C | 13.5°C | 818 mm | 2,043 |
Where Mérignac’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Segonzac, 14 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, Cognac, 19 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.
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 27.4°C. About 80 days a year reach 25°C, more than 71% of mainland French towns, and about 24 reach 30°C.
How cold does Mérignac get in winter?
February nights average 2.9°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 Mérignac get?
About 818 mm a year, more than 63% of mainland French towns. November is the wettest month (95 mm) and July the driest (52 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Cognac (19 km away), averages 2,043 hours of sunshine a year.
Are these figures for Mérignac itself?
No: they are the normals of the Météo-France station matched to Mérignac, Segonzac, 14 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 SEGONZAC_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.