11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Rain
9°
Feels like 8°
Wind↑ ESE 10 km/h
Gusts21 km/h
Humidity 97 %
💧 7.0 mm
Evening
Light rain
10°
Feels like 10°
Wind↑ N 4 km/h
Humidity 98 %
💧 3.7 mm
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Overcast
8°
Feels like 6°
Wind↑ N 13 km/h
Gusts31 km/h
Humidity 85 %
Evening
Rain showers
10°
Feels like 7°
Wind↑ N 17 km/h
Gusts38 km/h
Humidity 81 %
💧 0.2 mm
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Partly cloudy
9°
Feels like 7°
Wind↑ N 9 km/h
Gusts16 km/h
Humidity 75 %
Evening
Clear sky
7°
Feels like 5°
Wind↑ NNE 10 km/h
Humidity 83 %
14-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Clear sky
4°
Feels like 4°
Wind↑ N 4 km/h
Humidity 92 %
Rennes forecast in charts · next 7 days
The week ahead: highs and lows
▼ This week runs -2.1° cooler than usual
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Rennes climate: what a normal year looks like
From 16 h 04 min of daylight in late June to 8 h 21 min in late December.
There is no real dry season: monthly rainfall stays between 53 mm and 78 mm on average.
The hottest stretch is August, when afternoons average 24 °C; the coldest is January, when nights average 3 °C.
Even the coldest month, January, keeps nights above freezing on average (3 °C).
Forecast highs for the coming week average 13 °C, 3 °C cooler than a normal October (16 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
8 °C
3 °C
71 mm
Feb
10 °C
3 °C
59 mm
Mar
12 °C
4 °C
59 mm
Apr
14 °C
6 °C
65 mm
May
18 °C
10 °C
70 mm
Jun
21 °C
12 °C
60 mm
Jul
23 °C
14 °C
53 mm
Aug
24 °C
14 °C
54 mm
Sep
20 °C
11 °C
55 mm
Oct
16 °C
9 °C
74 mm
Nov
12 °C
6 °C
72 mm
Dec
9 °C
3 °C
78 mm
Whole year
16 °C
8 °C
770 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 48.12° N, 1.69° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Rennes: pollution and pollen
2/6
Fair
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.514µg/m³
PM1024µg/m³
O₃30µg/m³
NO₂14µg/m³
SO₂1µg/m³
Pollen
AlderNone
BirchNone
GrassNone
MugwortNone
OliveNone
RagweedNone
Copernicus CAMS model, updated several times a day.
Rain radar around Rennes
Rain observed over the last two hours by official weather radars around Rennes, followed by the radar forecast for the next hour where the weather service provides one.
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Rain radarLast two hours, then forecast where available · drag the timeline
Moon over Rennes
Waning gibbous
87 % illuminated · 18.3 days
Rise 05:31 Set 23:18
Fri30/1079%
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Moonrise and moonset in local time (Europe/Paris); phase and lit fraction from a synodic calculation.
Sea and tides near Rennes
Tide station used: Rennes · 1 km away
TodayThu 29/10
High range92
Low tide03:271.8 m
High tide08:5212.4 m
Low tide15:481.8 m
High tide21:1212.1 m
TomorrowFri 30/10
High range82
Low tide04:102.4 m
High tide09:3211.9 m
Low tide16:322.4 m
High tide21:5511.4 m
SatSat 31/10
High range70
Low tide04:533.1 m
High tide10:1611.2 m
Low tide17:193.1 m
High tide22:4410.5 m
SunSun 01/11
Mean tide58
Low tide05:433.9 m
High tide11:0810.3 m
Low tide18:183.8 m
High tide23:459.7 m
Indicative heights above chart datum. Coefficient: 20 for the weakest tides, 120 for the strongest. · more tide detail on TidesAtlas
Look up a past day in Rennes
Curious about the weather in Rennes on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Rennes weather at a glance
This page gathers everything about the weather in Rennes, Ille-et-Vilaine (35): conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “partly cloudy”, it is 13 °C (feels like 13 °C) and the wind blows at 12 km/h.
Expected range today: 7 °C to 14 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms, plus the tide times for Rennes.
Use the Rennes forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
