Rennes, France experiences average highs of 16°C (61°F) and lows of 9°C (48°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Average highs have warmed by 1.0°C (1.8°F) across the available records.
Rennes, France Weather & Climate 2026
Monthly climate averages for Rennes, France. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.2/10
Best: June, July, August, September
UV Index
4
Low
Temperature 16°C / 9°C
Feels Like 15°C / 7°C
Rainy Days 10
Rainfall 61 mm
Sunshine 8 h
Humidity 79%
Wind Speed 19 km/h
Dew Point 9°C
Snow Days 1 days
Frost Days 4 days
Hottest Month
24°C
August
Avg Low15°C
Rain7days
Coldest Month
3°C
January
Avg High9°C
Rain12days
Driest Month
7days
August
Avg High24°C
Avg Low15°C
Windiest Month
21 km/h
March (Gusts 43)
Worst Time to Visit
Consider avoiding January, February, December due to frequent rain.
Sun Position
Sunrise 06:07
Daylight 16h
Sunset 22:10
Live conditions—
Rennes on the map · live conditions
Rennes, France
- Continent
- Europe
- Country
- France
- City
- Rennes
- Population
- 227.8K
- Coordinates
- 48.11°, -1.67°
Seasonal Breakdown
Spring
Mar–May
Avg High 16°C
Avg Low 7°C
Rain 10 days/mo
Summer
Jun–Aug
Avg High 24°C
Avg Low 14°C
Rain 8 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 17°C
Avg Low 10°C
Rain 11 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 10°C
Avg Low 4°C
Rain 11 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 9°C / 3°C . Feb: 10°C / 4°C . Mar: 13°C / 5°C . Apr: 16°C / 7°C . May: 19°C / 10°C . Jun: 22°C / 13°C . Jul: 24°C / 15°C . Aug: 24°C / 15°C . Sep: 21°C / 13°C . Oct: 17°C / 10°C . Nov: 12°C / 7°C . Dec: 10°C / 5°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 71 mm. Feb: 50 mm. Mar: 61 mm. Apr: 56 mm. May: 56 mm. Jun: 77 mm. Jul: 49 mm. Aug: 40 mm. Sep: 55 mm. Oct: 78 mm. Nov: 71 mm. Dec: 72 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 87%. Feb: 82%. Mar: 79%. Apr: 74%. May: 73%. Jun: 73%. Jul: 71%. Aug: 72%. Sep: 76%. Oct: 82%. Nov: 86%. Dec: 88%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 20 km/h . Feb: 21 km/h . Mar: 21 km/h . Apr: 18 km/h . May: 18 km/h . Jun: 16 km/h . Jul: 17 km/h . Aug: 17 km/h . Sep: 18 km/h . Oct: 19 km/h . Nov: 20 km/h . Dec: 20 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 6h. Mar: 8h. Apr: 10h. May: 11h. Jun: 11h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 7h. Nov: 5h. Dec: 4h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 2. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 6. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 1 days. Feb: 1 days. Mar: 0 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 0 days.
Climate Trends
Average highs have warmed by 1.0°C (1.8°F) across the available records. Average rainfall is trending wetter by about 14 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 25°C | Aug · 24°C |
| Coldest month | Jan 2025 · 2°C | Jan · 3°C |
| Wettest month | Jan 2025 · 189 mm | Oct · 78 mm |
| Windiest month | Jan 2025 · 22 km/h | Mar · 21 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Fair April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 9°C / 3°C | 5°C / 0°C | 12days (71 mm) Wet | 4.2h Fair | 87% Very Muggy | 1.4 Low | Poor | View Details |
| February | 10°C / 4°C | 7°C / 0°C | 10days (50 mm) Wet | 5.6h Fair | 82% Humid | 2 Low | Poor | View Details |
| March | 13°C / 5°C | 9°C / 2°C | 12days (61 mm) Wet | 7.7h Good | 79% Humid | 3.8 Moderate | Fair | View Details |
| April | 16°C / 7°C | 13°C / 4°C | 9days (56 mm) Wet | 9.8h Good | 74% Muggy | 5 Moderate | Fair | View Details |
| May | 19°C / 10°C | 18°C / 8°C | 10days (56 mm) Wet | 11.1h Excellent | 73% Muggy | 6 High | Good | View Details |
| June best | 22°C / 13°C | 22°C / 13°C | 10days (77 mm) Wet | 11.3h Excellent | 73% Muggy | 6.6 High | Excellent | View Details |
| July best | 24°C / 15°C | 24°C / 14°C | 8days (49 mm) Wet | 11.5h Excellent | 71% Muggy | 6.2 High | Excellent | View Details |
| August best | 24°C / 15°C | 24°C / 15°C | 7days (40 mm) Good | 10.7h Excellent | 72% Muggy | 5.7 High | Excellent | View Details |
| September best | 21°C / 13°C | 20°C / 12°C | 10days (55 mm) Wet | 9.3h Good | 76% Humid | 4.5 Moderate | Excellent | View Details |
| October | 17°C / 10°C | 15°C / 8°C | 12days (78 mm) Wet | 6.8h Fair | 82% Humid | 2.9 Moderate | Good | View Details |
| November | 12°C / 7°C | 10°C / 4°C | 12days (71 mm) Wet | 5.3h Fair | 86% Very Muggy | 1.8 Low | Fair | View Details |
| December | 10°C / 5°C | 7°C / 2°C | 12days (72 mm) Wet | 3.9h Poor | 88% Very Muggy | 1.2 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Rennes are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Rennes, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Rennes is August, with average daytime highs of 24°C (75°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Rennes is January, with average overnight lows of 3°C (38°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Rennes is October, averaging 78mm of precipitation across 12 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Rennes runs through January, March, October, November, with the heaviest rainfall in January. Based on 10-year averages for Rennes.
Rennes receives approximately 97 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Rennes.
The least favorable months to visit Rennes are January, February, December, primarily due to frequent rain. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Rennes is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Rennes is 79%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Rennes receives snow. Months with snowfall average 1 snow days and 1 cm (0 in) of accumulation, with about 4 frost days during winter.
Average wind speeds in Rennes are 19 km/h (12 mph). The windiest month is March with peak winds reaching 21 km/h (13 mph) (gusts up to 43 km/h / 27 mph).
Rennes averages 3 clear-sky days per month with overall cloud cover around 65%. The clearest skies occur in July.
The annual average dew point in Rennes is 9°C (48°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Rennes has a Oceanic climate, classified as Cfb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Rennes ranges from 7°C (45°F) to 15°C (59°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Rennes. It earns a climate score of 8.2/10 with Excellent.
For June in Rennes, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 22°C (72°F) and 10 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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