10-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Clear sky
5°
Feels like 2°
Wind↑ W 18 km/h
Gusts47 km/h
Humidity 68 %
Afternoon
Clear sky
10°
Feels like 10°
Wind↑ W 11 km/h
Gusts27 km/h
Humidity 54 %
💧 0.1 mm
11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Overcast
7°
Feels like 6°
Wind↑ SSW 7 km/h
Humidity 74 %
💧 0.1 mm
Afternoon
Mainly clear
12°
Feels like 12°
Wind↑ NW 6 km/h
Humidity 69 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Clear sky
8°
Feels like 7°
Wind↑ WNW 8 km/h
Humidity 75 %
Afternoon
Partly cloudy
15°
Feels like 15°
Wind↑ ENE 7 km/h
Humidity 52 %
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Clear sky
8°
Feels like 6°
Wind↑ WNW 9 km/h
Humidity 74 %
Afternoon
Clear sky
16°
Feels like 16°
Wind↑ NW 10 km/h
Humidity 53 %
Sendai 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)
Sendai climate: what a normal year looks like
The hottest stretch is August, when afternoons average 27 °C; the coldest is January, when nights average −1 °C. Between those two months the average temperature changes by 23 °C.
Nights typically freeze in January and February, the coldest averaging −1 °C in January.
From 14 h 50 min of daylight in late June to 9 h 30 min in late December.
A normal year brings roughly 1,410 mm of rain — more than 72% of the towns of 20,000+ people we compared it with.
Forecast highs for the coming week average 15 °C, 3 °C cooler than a normal October (18 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
4 °C
−1 °C
71 mm
Feb
5 °C
−1 °C
57 mm
Mar
8 °C
2 °C
94 mm
Apr
14 °C
6 °C
102 mm
May
18 °C
12 °C
111 mm
Jun
21 °C
16 °C
140 mm
Jul
25 °C
20 °C
193 mm
Aug
27 °C
22 °C
175 mm
Sep
23 °C
18 °C
180 mm
Oct
18 °C
12 °C
150 mm
Nov
13 °C
6 °C
70 mm
Dec
7 °C
1 °C
66 mm
Whole year
15 °C
9 °C
1,410 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 38.27° N, 140.87° 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 Sendai: pollution and pollen
1/6
Good
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.55µg/m³
PM107µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Sendai
Rain observed over the last two hours by official weather radars around Sendai, 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
No open weather radar covers Sendai yet: the map shows our hour-by-hour rain forecast (ICON, GFS).
Moon over Sendai
Waning gibbous
79 % illuminated · 19.3 days
Rise 14:44 Set 05:33
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
Wed11/113%
Moonrise and moonset in local time (Asia/Tokyo); phase and lit fraction from a synodic calculation.
Look up a past day in Sendai
Curious about the weather in Sendai on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Sendai weather at a glance
This page gathers everything about the weather in Sendai, Miyagi: 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 11 °C (feels like 11 °C) and the wind blows at 7 km/h.
Expected range today: 10 °C to 17 °C and around 1 mm of rain. 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 Sendai 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.
