11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Rain
11°
Feels like 11°
Wind↑ SE 10 km/h
Gusts28 km/h
Humidity 99 %
💧 12.9 mm
Evening
Light rain
11°
Feels like 11°
Wind↑ NNW 6 km/h
Humidity 97 %
💧 1.4 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
7°
Feels like 4°
Wind↑ NNE 25 km/h
Gusts44 km/h
Humidity 81 %
Evening
Mainly clear
8°
Feels like 6°
Wind↑ NNW 13 km/h
Gusts29 km/h
Humidity 88 %
💧 0.1 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
8°
Feels like 6°
Wind↑ NNE 10 km/h
Gusts20 km/h
Humidity 81 %
Evening
Mainly clear
8°
Feels like 7°
Wind↑ NNE 9 km/h
Humidity 71 %
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 1°
Wind↑ NE 10 km/h
Humidity 91 %
Saint-Herblain forecast in charts · next 7 days
The week ahead: highs and lows
▼ This week runs -2.5° cooler than usual
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Saint-Herblain climate: what a normal year looks like
From 15 h 55 min of daylight in late June to 8 h 28 min in late December.
There is no real dry season: monthly rainfall stays between 45 mm and 84 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 12 °C, 5 °C cooler than a normal October (17 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
9 °C
3 °C
77 mm
Feb
10 °C
4 °C
60 mm
Mar
13 °C
5 °C
58 mm
Apr
15 °C
7 °C
62 mm
May
19 °C
10 °C
65 mm
Jun
22 °C
13 °C
50 mm
Jul
24 °C
15 °C
45 mm
Aug
24 °C
15 °C
51 mm
Sep
21 °C
12 °C
54 mm
Oct
17 °C
10 °C
78 mm
Nov
12 °C
6 °C
76 mm
Dec
9 °C
4 °C
84 mm
Whole year
16 °C
9 °C
760 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 47.22° N, 1.63° 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 Saint-Herblain: pollution and pollen
2/6
Fair
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.511µg/m³
PM1021µg/m³
O₃43µg/m³
NO₂10µg/m³
SO₂1µg/m³
Pollen
AlderNone
BirchNone
GrassNone
MugwortNone
OliveNone
RagweedNone
Copernicus CAMS model, updated several times a day.
Rain radar around Saint-Herblain
Rain observed over the last two hours by official weather radars around Saint-Herblain, 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 Saint-Herblain
Waning gibbous
87 % illuminated · 18.3 days
Rise 05:36 Set 23:13
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 Saint-Herblain
Tide station used: Nantes Usine Brulee · 4 km away
Sea state
Smooth
waves 0.5 m
Period
12 s
Swell
0.4 m
TodayThu 29/10
High range92
Low tide02:340.9 m
High tide06:515.9 m
Low tide14:550.9 m
High tide19:095.6 m
TomorrowFri 30/10
High range82
Low tide03:171.0 m
High tide07:275.7 m
Low tide15:411.0 m
High tide19:485.3 m
SatSat 31/10
High range70
Low tide04:021.2 m
High tide08:095.4 m
Low tide16:281.1 m
High tide20:354.9 m
SunSun 01/11
Mean tide58
Low tide04:511.4 m
High tide09:035.0 m
Low tide17:211.3 m
High tide21:384.5 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 Saint-Herblain
Curious about the weather in Saint-Herblain on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Saint-Herblain weather at a glance
This page gathers everything about the weather in Saint-Herblain, Loire-Atlantique (44): 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 15 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 Nantes Usine Brulee.
Use the Saint-Herblain 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.
