Winter nights in Sepx are colder than in 83% of mainland French towns
July afternoons average 26.0°C. It is a wet place: more rain falls here than on 61% of mainland French towns. Expect the heaviest rain in May and the lightest in August. For walks and days out, the stretch from May to September brings highs of 20–26°C.
Figures from Météo-France’s Clarac station, 19 km west.
A year in Sepx at a glance
Each month’s typical high and low in °C, at the Clarac station.
What a year in Sepx feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Clarac.
About 805 mm of rain a year
May is the wettest month and August the driest. About 25 days a year bring 10 mm or more. 3rd wettest of 96 towns of 2,500+ in Haute-Garonne.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Saint-Girons
A frosty town: 58 frosts and 68 days of 25°C a year
On about 58 nights a year the air drops to 0°C or below, and on about 1 days it stays below freezing all day. About 68 days a year reach 25°C, and 18 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Clarac: 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 Clarac
Clarac is 19 km west of Sepx. Every figure on this page is the station’s, not a measurement in Sepx itself.
| Station (Météo-France number) | Clarac (31147001) |
| Distance from the town | 19 km west |
| Station altitude | 401 m |
| Town altitude (its center) | 401 m |
| Period | 1994–2020 (the station’s own record) |
| Sunshine measured at | Saint-Girons, 27 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 Sepx 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 Haute-Garonne.
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 |
|---|---|---|---|---|
| Sepx | Clarac | 26.0°C | 0.1°C | 805 mm |
| Saint-Gaudens 10 km | same station | 26.0°C about the same | 0.1°C about the same | 805 mm |
| Cazères 21 km | Cérizols | 26.4°C about the same | −0.3°C about the same | 976 mm |
| Montréjeau 23 km | same station | 26.0°C about the same | 0.1°C about the same | 805 mm |
Sepx weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Clarac station; sunshine at Saint-Girons.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 10.3°C | 0.1°C | 5.2°C | 77 mm | 116 |
| February | 11.5°C | 0.6°C | 6.0°C | 60 mm | 129 |
| March | 14.6°C | 2.7°C | 8.6°C | 69 mm | 169 |
| April | 16.9°C | 5.3°C | 11.1°C | 81 mm | 171 |
| May | 20.0°C | 9.0°C | 14.5°C | 91 mm | 183 |
| June | 23.7°C | 12.7°C | 18.2°C | 61 mm | 193 |
| July | 26.0°C | 14.7°C | 20.4°C | 54 mm | 211 |
| August | 26.3°C | 14.5°C | 20.4°C | 49 mm | 209 |
| September | 23.4°C | 11.2°C | 17.3°C | 54 mm | 193 |
| October | 19.7°C | 7.9°C | 13.8°C | 56 mm | 157 |
| November | 13.7°C | 3.1°C | 8.4°C | 87 mm | 119 |
| December | 11.1°C | 0.6°C | 5.8°C | 66 mm | 113 |
| Year | 18.1°C | 6.9°C | 12.5°C | 805 mm | 1,964 |
Where Sepx’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Clarac, 19 km away: statistics for 1991–2020 (the station’s own years, 1994–2020, where its record is shorter).
- 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, Saint-Girons, 27 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 Haute-Garonne.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Sepx’s climate
How warm does Sepx get in summer?
August is the warmest month, with average highs of 26.3°C. About 68 days a year reach 25°C, more than 61% of mainland French towns, and about 18 reach 30°C.
How cold does Sepx get in winter?
January nights average 0.1°C. The air drops to 0°C or below on about 58 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Sepx get?
About 805 mm a year, more than 61% of mainland French towns. May is the wettest month (91 mm) and August the driest (49 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Girons (27 km away), averages 1,964 hours of sunshine a year.
Are these figures for Sepx itself?
No: they are the normals of the Météo-France station matched to Sepx, Clarac, 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 CLARAC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Sepx →
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.