Rennes weather in October

In October, Rennes sees average daytime highs of 16°C and overnight lows near 9°C, with 69 mm of rain across 11.4 wet days and about 10.6 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 15°C by the end. The sky is clear or mostly clear about 16% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of October to 9 h 42 min by month's end. Set against the rest of the year, October is Rennes's 9th-clearest and 6th-windiest month. For the whole year in context, see Rennes's year-round climate.

Daytime high
16°
6th warmest
Overnight low
7th coldest
Rainfall
69 mm
11.4 wet days
Daylight
10 h 36 min
7:35 AM – 6:09 PM
Cloud cover
71%
9th clearest
Wind
13 km/h
6th windiest
Solar energy
2.15 kWh/m²
Travel score
4.9
out of 10

Rennes is capital city of the region of Brittany, France.

Air quality
Good
PM2.5 9.4 µg/m³ · 2019
Density
4,521/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 18°C in the first days to 15°C by the end.

A typical October day in Rennes reaches about 16°C in the afternoon and slips back to 9°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 20°C. Set against its neighbours, October runs about 4°C cooler than September and about 4°C warmer than November.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11910
21810
31810
41810
51810
61810
71810
81810
91710
101710
111710
12179
13179
14179
15179
16169
17169
18169
19169
20169
21168
22168
23158
24158
25158
26158
27158
28158
29158
30148
31148

How October really feels in Rennes

Once humidity and wind are folded in, October averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Rennes weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6411.20.58.61.5
Feb / 529.80.49.91.9
Mar12° / 5210.50.211.63.2
Apr15° / 5811.1013.44.3
May18° / 6310.8014.95.6
Jun21° / 12°539.1015.86.5
Jul23° / 14°467.8015.47.2
Aug23° / 14°478.2014.17.1
Sep21° / 11°498.2012.46.6
Oct16° / 6911.4010.64.9
Nov12° / 6511.3092.9
Dec / 7112.10.38.21.7

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 15% of October, with mostly cloudy or overcast conditions the remaining 69%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23070
32971
42872
52872
62971
72971
82971
92971
103070
113169
123169
133169
143169
153268
163367
173466
183466
193367
203367
213268
223268
233367
243367
253367
263367
273367
283367
293268
303268
313367

Chance of precipitation in October

Any precipitation

Rennes gets around 69 mm of rain over 11.4 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
236
336
436
536
636
736
836
936
1036
1136
1236
1336
1437
1537
1637
1737
1838
1938
2038
2138
2238
2338
2437
2537
2637
2737
2838
2938
3038
3138

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, October lands in the dry band about 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
171254
271254
371254
472253
572253
673243
773243
873243
974233
1074233
1175232
1276222
1376222
1476222
1577221
1678211
1778211
1879201
1980191
2082180
2182180
2283170
2384160
2485150
2586140
2687130
2787130
2888120
2989110
3090100
319190

Wind in October

Winds average 13 km/h in October.

Across October, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 24 min at the start of October to 9 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over October. Sunrise moves from 7:12 AM to 7:58 AM, and sunset from 6:39 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:126:39
211.47:146:37
311.37:156:35
411.37:176:33
511.27:186:31
611.17:206:29
711.17:216:27
811.07:236:25
911.07:246:22
1010.97:266:20
1110.97:276:18
1210.87:296:16
1310.77:306:15
1410.77:326:13
1510.67:336:11
1610.67:356:09
1710.57:366:07
1810.57:386:05
1910.47:396:03
2010.37:416:01
2110.37:425:59
2210.27:445:58
2310.27:465:56
2410.17:475:54
2510.17:495:52
2610.07:505:51
2710.07:525:49
289.97:535:47
299.87:555:46
309.87:575:44
319.77:585:42

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.15 kWh/m².

For context, solar energy here swings from a low near 0.91 kWh/m² to a high of 5.77 kWh/m² in June across the year — October's 2.15 kWh/m² falls in the middle.

0123151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.7Moderate
32.7Moderate
42.6Moderate
52.6Moderate
62.5Moderate
72.5Moderate
82.4Moderate
92.4Moderate
102.4Moderate
112.3Moderate
122.3Moderate
132.3Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.1Moderate
182.1Moderate
192.1Moderate
202.0Moderate
212.0Moderate
222.0Dim
231.9Dim
241.9Dim
251.9Dim
261.9Dim
271.8Dim
281.8Dim
291.8Dim
301.7Dim
311.7Dim
Planning a trip in October

Is October a good time to visit Rennes?

Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.9
Sightseeing
6th-best month of the year
0.9
Beach & pool
6th-best month of the year

October is a reasonable time to visit Rennes for sightseeing.

What to pack for Rennes in October

From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In October, Rennes sees daytime highs around 16°C and nights near 9°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Rennes in October

The nearest coast averages about 16°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 57 km away) is warmest in August at about 19°C and coldest in February near 8°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr10Bracing
May13Bracing
Jun16Cool
Jul18Cool
Aug19Cool
Sep18Cool
Oct16Cool
Nov13Bracing
Dec10Bracing

UV index in Rennes in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rennes peaks around June 18 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 18UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5High
May6High
Jun7High
Jul6High
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Rennes?

Rennes sits at 48.1°N, 1.7°W, 39 m above sea level, in France. The nearest listed city is Cesson-Sévigné, 5.0 km away.

Topography around Rennes

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rennes.

Within 3 km, the terrain around Rennes has only modest variations in elevation — a maximum elevation change of 51 m around an average of 40 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 118 m; within 80 km, significant variations in elevation — a maximum elevation change of 353 m.

The land around Rennes is covered by artificial surfaces (63%) and trees (29%) within 3 km, cropland (33%), grassland (28%) and trees (27%) within 16 km, and cropland (44%), grassland (27%) and trees (21%) within 80 km.

3 km
51 m
16 km
118 m
80 km
353 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Cesson-Sévigné 5.0 km · Vitré 35 km · Fougères 44 km · Saint-Malo 65 km · Laval 67 km · Mayenne 81 km · La Chapelle-sur-Erdre 91 km · Carquefou 92 km

France travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 77% of US
price level, 2025
GDP per capita
$48,986
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.3
per 100k, 2023
Road deaths
5.1
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 539
Religion
Roman Catholic 47%none 33%Muslim 4%Protestant 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Rennes (48.1111°, -1.6743°, elevation 39 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).