Fewer days reach 25 degrees in Hillion than in 95% of mainland French towns
The coldest hours of a January night bottom out at 3.5°C on average. Its January nights stay gentler than in 85% of mainland French towns. Of all months, November brings the most rain and July the least. Windscreens need scraping on about 29 mornings a year, the nights the air drops below 0°C.
These are the figures of Météo-France’s Quintenic station, 17 km east.
A year in Hillion at a glance
Each month’s typical high and low in °C, at the Quintenic station.
What a year in Hillion feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Quintenic.
About 770 mm of rain a year
November is the wettest month and July the driest. About 20 days a year bring 10 mm or more. 27th wettest of 61 towns of 2,500+ in Côtes-d'Armor.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Saint-Brieuc
29 frosts and 21 days of 25°C a year
On about 29 nights a year the air drops to 0°C or below, and on about under 1 days it stays below freezing all day. About 21 days a year reach 25°C, and 3 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Quintenic: 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 Quintenic
Quintenic is 17 km east of Hillion. Every figure on this page is the station’s, not a measurement in Hillion itself.
| Station (Météo-France number) | Quintenic (22261002) |
| Distance from the town | 17 km east |
| Station altitude | 71 m |
| Town altitude (its center) | 47 m |
| Period | 1991–2020 |
| Nearest station of any kind | 15 km |
| Sunshine measured at | Saint-Brieuc, 15 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 Hillion 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 Côtes-d'Armor.
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 |
|---|---|---|---|---|
| Hillion | Quintenic | 22.6°C | 3.5°C | 770 mm |
| Yffiniac 3.5 km | same station | 22.6°C about the same | 3.5°C about the same | 770 mm |
| Langueux 4.4 km | Saint-Brieuc | 21.4°C 1.2°C cooler | 3.8°C about the same | 757 mm |
| Trégueux 6.8 km | Saint-Brieuc | 21.4°C 1.2°C cooler | 3.8°C about the same | 757 mm |
| Saint-Brieuc 8 km | Saint-Brieuc | 21.4°C 1.2°C cooler | 3.8°C about the same | 757 mm |
| Quessoy 8.2 km | same station | 22.6°C about the same | 3.5°C about the same | 770 mm |
| Plérin 8.8 km | Saint-Brieuc | 21.4°C 1.2°C cooler | 3.8°C about the same | 757 mm |
Hillion weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Quintenic station; sunshine at Saint-Brieuc.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 9.1°C | 3.5°C | 6.3°C | 66 mm | 65 |
| February | 9.8°C | 3.2°C | 6.5°C | 59 mm | 83 |
| March | 12.1°C | 4.2°C | 8.2°C | 53 mm | 122 |
| April | 14.5°C | 5.3°C | 9.9°C | 59 mm | 163 |
| May | 17.5°C | 8.2°C | 12.9°C | 57 mm | 188 |
| June | 20.4°C | 10.9°C | 15.7°C | 54 mm | 196 |
| July | 22.6°C | 12.5°C | 17.6°C | 49 mm | 198 |
| August | 22.8°C | 12.7°C | 17.8°C | 52 mm | 182 |
| September | 20.6°C | 10.6°C | 15.6°C | 61 mm | 164 |
| October | 16.5°C | 8.8°C | 12.7°C | 85 mm | 110 |
| November | 12.4°C | 6.1°C | 9.2°C | 90 mm | 79 |
| December | 9.7°C | 3.9°C | 6.8°C | 86 mm | 66 |
| Year | 15.7°C | 7.5°C | 11.6°C | 770 mm | 1,616 |
Where Hillion’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Quintenic, 17 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-Brieuc, 15 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 Côtes-d'Armor.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Hillion’s climate
How warm does Hillion get in summer?
August is the warmest month, with average highs of 22.8°C. About 21 days a year reach 25°C, fewer than 95% of mainland French towns, and about 3 reach 30°C.
How cold does Hillion get in winter?
February nights average 3.2°C. The air drops to 0°C or below on about 29 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Hillion get?
About 770 mm a year, more than 53% of mainland French towns. November is the wettest month (90 mm) and July the driest (49 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Saint-Brieuc (15 km away), averages 1,616 hours of sunshine a year.
Are these figures for Hillion itself?
No: they are the normals of the Météo-France station matched to Hillion, Quintenic, 17 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 QUINTENIC, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Hillion →
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.