11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Overcast
9°
Feels like 7°
Wind↑ E 13 km/h
Gusts29 km/h
Humidity 70 %
Evening
Drizzle
9°
Feels like 7°
Wind↑ ENE 14 km/h
Gusts30 km/h
Humidity 74 %
💧 0.6 mm
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Rain
7°
Feels like 4°
Wind↑ N 15 km/h
Gusts25 km/h
Humidity 84 %
💧 5.7 mm
Evening
Rain showers
8°
Feels like 5°
Wind↑ N 16 km/h
Gusts37 km/h
Humidity 77 %
💧 1.8 mm
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Mainly clear
7°
Feels like 5°
Wind↑ NNW 7 km/h
Gusts22 km/h
Humidity 80 %
Evening
Clear sky
9°
Feels like 8°
Wind↑ WNW 5 km/h
Humidity 69 %
14-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Partly cloudy
6°
Feels like 5°
Wind↑ NW 5 km/h
Humidity 87 %
Massy forecast in charts · next 7 days
The week ahead: highs and lows
≈ A week close to the usual temperatures
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Massy climate: what a normal year looks like
From 16 h 09 min of daylight in late June to 8 h 16 min in late December.
There is no real dry season: monthly rainfall stays between 52 mm and 74 mm on average.
The hottest stretch is August, when afternoons average 25 °C; the coldest is January, when nights average 1 °C.
A normal year brings roughly 730 mm of rain — less than 70% of the towns of 20,000+ people we compared it with.
Forecast highs for the coming week average 12 °C, 4 °C cooler than a normal October (16 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
7 °C
1 °C
58 mm
Feb
8 °C
2 °C
53 mm
Mar
12 °C
4 °C
56 mm
Apr
15 °C
6 °C
55 mm
May
19 °C
10 °C
71 mm
Jun
22 °C
13 °C
62 mm
Jul
24 °C
15 °C
60 mm
Aug
25 °C
14 °C
61 mm
Sep
20 °C
11 °C
52 mm
Oct
16 °C
9 °C
67 mm
Nov
11 °C
5 °C
64 mm
Dec
7 °C
2 °C
74 mm
Whole year
15 °C
8 °C
730 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 48.73° N, 2.27° E, 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 Massy: pollution and pollen
3/6
Moderate
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.523µg/m³
PM1041µg/m³
O₃0µg/m³
NO₂80µg/m³
SO₂7µg/m³
Pollen
AlderNone
BirchNone
GrassNone
MugwortNone
OliveNone
RagweedNone
Copernicus CAMS model, updated several times a day.
Rain radar around Massy
Rain observed over the last two hours by official weather radars around Massy, followed by the radar forecast for the next hour where the weather service provides one.
Rain radarLast two hours, then forecast where available · drag the timeline
Moon over Massy
Waning gibbous
87 % illuminated · 18.3 days
Rise 05:11 Set 23:05
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.
Look up a past day in Massy
Curious about the weather in Massy on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Massy weather at a glance
This page gathers everything about the weather in Massy, Essonne (91): conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “clear sky”, it is 10 °C (feels like 10 °C) and the wind blows at 7 km/h.
Expected range today: 5 °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.
Use the Massy 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.
