Setagaya climate: monthly averages: annual mean temperature 13.9 C; warmest month Aug (25.8 C); coldest month Jan (2.2 C).
Annual mean temperature: 13.9 C
Warmest month: Aug (25.8 C)
Coldest month: Jan (2.2 C)
Wettest month: Sep (7.17 mm/day)
All-time record high: 37.5 C
All-time record low: -7.0 C
A consolidated reference for Setagaya climate: monthly averages, rebuilt from public data on a schedule. Expect 2.2 C at the coldest (Jan) and 25.8 C at the warmest (Aug) — a 23.6 C spread. Expect a wet month and a dry month but no real season: 7.17 mm/day in Sep against 2.13 mm/day in Jan. Taken together that is roughly 1,632 mm of rain a year for the grid cell. Values come from a public open API; a successful result is cached so a later outage never blanks the page. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 13.9 C
Warmest month Aug (25.8 C)
Coldest month Jan (2.2 C)
Wettest month Sep (7.17 mm/day)
All-time record high 37.5 C
All-time record low -7.0 C
Annual precipitation 1,635 mm / year
Coordinates 35.64188, 139.64715
Population 940,071
Average monthly temperature and rainfall in Setagaya
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
2.2
2.13
17.2
-7.0
Feb
3.4
2.36
21.9
-5.8
Mar
6.9
3.70
23.5
-4.2
Apr
12.0
4.29
28.3
-3.2
May
17.0
4.58
30.8
3.4
Jun
20.8
6.02
34.9
9.1
Jul
24.7
5.80
36.6
13.2
Aug
25.8
4.99
37.5
15.3
Sep
22.1
7.17
35.7
7.6
Oct
16.1
7.16
30.9
3.4
Nov
10.4
3.24
23.8
-2.1
Dec
4.8
2.23
21.7
-5.2
What the Setagaya climate table shows
Values are multi-decadal climatological averages for the 35.64188, 139.64715 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
How much rain is 7.17 mm/day in a month?
Rain is recorded as a daily mean, so 7.17 mm/day is roughly 218 mm across a 30-day month.
Does Setagaya get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.