Ice on the ground: Riolas sees more frosts than 91% of mainland French towns
The warmest part of a July day comes in at 26.4°C on average. Of the 96 towns of 2,500+ in Haute-Garonne, it is the wettest. The rainiest month is April; the driest is August. Picnics, hikes and garden evenings come into their own from May to September, with highs of 20–27°C.
These are the figures of Météo-France’s Cérizols station, 27 km south-east; at that distance they describe the area more than the town.
A year in Riolas at a glance
Each month’s typical high and low in °C, at the Cérizols station.
What a year in Riolas feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Cérizols.
About 976 mm of rain a year
April is the wettest month and August the driest. About 32 days a year bring 10 mm or more. The 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: 70 frosts and 75 days of 25°C a year
On about 70 nights a year the air drops to 0°C or below, and on about 2 days it stays below freezing all day. About 75 days a year reach 25°C, and 23 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Cérizols: 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 Cérizols
Cérizols is 27 km south-east of Riolas. Every figure on this page is the station’s, not a measurement in Riolas itself.
| Station (Météo-France number) | Cérizols (09094001) |
| Distance from the town | 27 km south-east |
| Station altitude | 374 m |
| Town altitude (its center) | 332 m |
| Period | 1991–2020 |
| Nearest station of any kind | 20 km |
| Sunshine measured at | Saint-Girons, 41 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 Riolas 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 |
|---|---|---|---|---|
| Riolas | Cérizols | 26.4°C | −0.3°C | 976 mm |
| Samatan 16 km | Isle-Jourdain | 28.9°C 2.5°C warmer | 1.8°C 2.1°C milder | 709 mm |
| Rieumes 18 km | Muret-Lherm | 28.0°C 1.6°C warmer | 2.0°C 2.3°C milder | 620 mm |
| Cazères 21 km | same station | 26.4°C about the same | −0.3°C about the same | 976 mm |
| Bérat 21 km | Muret-Lherm | 28.0°C 1.6°C warmer | 2.0°C 2.3°C milder | 620 mm |
| Rieux-Volvestre 25 km | Muret-Lherm | 28.0°C 1.6°C warmer | 2.0°C 2.3°C milder | 620 mm |
| Carbonne 25 km | Muret-Lherm | 28.0°C 1.6°C warmer | 2.0°C 2.3°C milder | 620 mm |
Riolas weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Cérizols station; sunshine at Saint-Girons.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 10.2°C | −0.3°C | 5.0°C | 83 mm | 116 |
| February | 11.3°C | 0.1°C | 5.7°C | 70 mm | 129 |
| March | 14.6°C | 2.3°C | 8.5°C | 73 mm | 169 |
| April | 16.9°C | 4.8°C | 10.9°C | 108 mm | 171 |
| May | 20.3°C | 8.6°C | 14.5°C | 106 mm | 183 |
| June | 24.0°C | 12.1°C | 18.1°C | 84 mm | 193 |
| July | 26.4°C | 14.1°C | 20.3°C | 68 mm | 211 |
| August | 26.9°C | 14.0°C | 20.4°C | 65 mm | 209 |
| September | 23.6°C | 10.5°C | 17.1°C | 66 mm | 193 |
| October | 19.4°C | 7.4°C | 13.4°C | 76 mm | 157 |
| November | 13.6°C | 3.0°C | 8.3°C | 101 mm | 119 |
| December | 11.0°C | 0.3°C | 5.7°C | 79 mm | 113 |
| Year | 18.2°C | 6.4°C | 12.3°C | 976 mm | 1,964 |
Where Riolas’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Cérizols, 27 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, Saint-Girons, 41 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 Riolas’s climate
How warm does Riolas get in summer?
August is the warmest month, with average highs of 26.9°C. About 75 days a year reach 25°C, more than 67% of mainland French towns, and about 23 reach 30°C.
How cold does Riolas get in winter?
January nights average −0.3°C. The air drops to 0°C or below on about 70 nights a year, and about 2 days a year stay below freezing all day.
How much rain does Riolas get?
About 976 mm a year, more than 87% of mainland French towns. April is the wettest month (108 mm) and August the driest (65 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Girons (41 km away), averages 1,964 hours of sunshine a year.
Are these figures for Riolas itself?
No: they are the normals of the Météo-France station matched to Riolas, Cérizols, 27 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 CERIZOLS, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Riolas →
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.