Rennes weather in July

In July, Rennes sees average daytime highs of 23°C and overnight lows near 14°C, with 46 mm of rain across 7.8 wet days and about 15.4 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 22% of the time in July, and the air most often feels comfortable.

Daylight stretches from about 15 h 48 min at the start of July to 14 h 54 min by month's end. Set against the rest of the year, July is Rennes's 2nd-clearest and 11th-windiest month. For the whole year in context, see Rennes's year-round climate.

Daytime high
23°
1st warmest
Overnight low
14°
12th coldest
Rainfall
46 mm
7.8 wet days
Daylight
15 h 30 min
5:28 AM – 8:57 PM
Cloud cover
62%
2nd clearest
Wind
12 km/h
11th windiest
Solar energy
5.54 kWh/m²
Travel score
7.2
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 July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical July day in Rennes reaches about 23°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 28°C. Set against its neighbours, July runs about 2°C warmer than June and on par with August.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12313
22313
32313
42313
52313
62313
72313
82313
92313
102313
112313
122313
132314
142314
152314
162414
172414
182414
192414
202414
212414
222414
232414
242414
252414
262414
272414
282414
292414
302414
312414

How July really feels in Rennes

Once humidity and wind are folded in, July 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

July 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 July compares with the rest of the year at a glance. July is the 1st-warmest and 12th-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 20% of July, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
34159
44159
54159
64159
74258
84357
94357
104456
114555
124456
134456
144456
154555
164456
174456
184456
194357
204357
214357
224258
234258
244159
254060
264060
274060
284060
293961
303961
313961

Chance of precipitation in July

Any precipitation

Rennes gets around 46 mm of rain over 7.8 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
131
231
330
430
530
629
729
828
927
1026
1125
1224
1324
1423
1522
1622
1722
1822
1922
2022
2122
2223
2323
2423
2523
2623
2723
2823
2923
3024
3124

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the comfortable band about 46% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1503992
2504082
3494181
4484281
5474381
6474491
7464491
8454591
94445101
104446101
114346111
124246111
134147121
144047121
153947131
163848141
173748141
183648151
193548161
203448171
213348171
223348181
233248182
243247192
253247192
263247192
273247192
283247202
293246202
303246202
313245212

Wind in July

Winds average 12 km/h in July.

Across July, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 48 min at the start of July to 14 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over July. Sunrise moves from 5:16 AM to 5:45 AM, and sunset from 9:04 PM to 8:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.85:169:04
215.85:169:04
315.85:179:04
415.85:189:03
515.75:189:03
615.75:199:03
715.75:209:02
815.75:219:02
915.75:219:01
1015.65:229:01
1115.65:239:00
1215.65:249:00
1315.65:258:59
1415.55:268:58
1515.55:278:58
1615.55:288:57
1715.55:298:56
1815.45:308:55
1915.45:318:54
2015.45:328:53
2115.35:338:52
2215.35:348:51
2315.25:358:50
2415.25:378:49
2515.25:388:48
2615.15:398:47
2715.15:408:46
2815.05:428:44
2915.05:438:43
3015.05:448:42
3114.95:458:40

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.54 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 — July's 5.54 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in July

Is July a good time to visit Rennes?

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

7.2
Sightseeing
1st-best month of the year
5.8
Beach & pool
1st-best month of the year

July is one of the better times to visit Rennes for general sightseeing.

What to pack for Rennes in July

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

In July, Rennes sees daytime highs around 23°C and nights near 14°C. Worth packing: light clothes and sun protection. About 8 days see rain.

light clothessun protection

Sea temperature near Rennes in July

The nearest coast averages about 18°C in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 6 — enough to warrant sun protection. 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
July 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).