Midwinter lows in Semussac stay above those of 88% of mainland French towns
Expect July afternoons of about 25.4°C. It is a wet place: more rain falls here than on 71% of mainland French towns. Of all months, November brings the most rain and July the least. Frost greets about 24 mornings a year, so leave time to clear the car.
These are the figures of Météo-France’s Royan-Medis station, 5.6 km north-west.
A year in Semussac at a glance
Each month’s typical high and low in °C, at the Royan-Medis station.
What a year in Semussac feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Royan-Medis.
About 856 mm of rain a year
November is the wettest month and July the driest. About 27 days a year bring 10 mm or more. 8th wettest of 54 towns of 2,500+ in Charente-Maritime.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Pauillac
24 frosts and 56 days of 25°C a year
On about 24 nights a year the air drops to 0°C or below, and on about 1 days it stays below freezing all day. About 56 days a year reach 25°C, and 15 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Royan-Medis: 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 Royan-Medis
Royan-Medis is 5.6 km north-west of Semussac. Every figure on this page is the station’s, not a measurement in Semussac itself.
| Station (Météo-France number) | Royan-Medis (17306004) |
| Distance from the town | 5.6 km north-west |
| Station altitude | 12 m |
| Town altitude (its center) | 22 m |
| Period | 1991–2020 |
| Sunshine measured at | Pauillac, 44 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 Semussac 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 |
|---|---|---|---|---|
| Semussac | Royan-Medis | 25.4°C | 3.7°C | 856 mm |
| Meschers-sur-Gironde 5 km | same station | 25.4°C about the same | 3.7°C about the same | 856 mm |
| Médis 5.7 km | same station | 25.4°C about the same | 3.7°C about the same | 856 mm |
| Saint-Georges-de-Didonne 5.7 km | same station | 25.4°C about the same | 3.7°C about the same | 856 mm |
| Saujon 8 km | same station | 25.4°C about the same | 3.7°C about the same | 856 mm |
| Royan 9.1 km | same station | 25.4°C about the same | 3.7°C about the same | 856 mm |
| Saint-Sulpice-de-Royan 10 km | same station | 25.4°C about the same | 3.7°C about the same | 856 mm |
Semussac weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Royan-Medis station; sunshine at Pauillac.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.7°C | 3.7°C | 6.7°C | 87 mm | 84 |
| February | 11.1°C | 3.5°C | 7.3°C | 60 mm | 126 |
| March | 14.3°C | 5.4°C | 9.8°C | 60 mm | 171 |
| April | 16.8°C | 7.3°C | 12.1°C | 69 mm | 205 |
| May | 20.4°C | 10.8°C | 15.6°C | 63 mm | 232 |
| June | 23.6°C | 13.8°C | 18.7°C | 54 mm | 251 |
| July | 25.4°C | 15.4°C | 20.4°C | 43 mm | 273 |
| August | 25.7°C | 15.2°C | 20.5°C | 50 mm | 255 |
| September | 23.1°C | 12.6°C | 17.8°C | 71 mm | 223 |
| October | 18.8°C | 10.5°C | 14.6°C | 89 mm | 158 |
| November | 13.6°C | 6.8°C | 10.2°C | 107 mm | 106 |
| December | 10.4°C | 4.3°C | 7.4°C | 103 mm | 92 |
| Year | 17.7°C | 9.1°C | 13.4°C | 856 mm | 2,175 |
Where Semussac’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Royan-Medis, 5.6 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, 44 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 Semussac’s climate
How warm does Semussac get in summer?
August is the warmest month, with average highs of 25.7°C. About 56 days a year reach 25°C, fewer than 59% of mainland French towns, and about 15 reach 30°C.
How cold does Semussac get in winter?
February nights average 3.5°C. The air drops to 0°C or below on about 24 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Semussac get?
About 856 mm a year, more than 71% of mainland French towns. November is the wettest month (107 mm) and July the driest (43 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Pauillac (44 km away), averages 2,175 hours of sunshine a year.
Are these figures for Semussac itself?
No: they are the normals of the Météo-France station matched to Semussac, Royan-Medis, 5.6 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 ROYAN-MEDIS, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Semussac →
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.