A consolidated reference for Kawaguchi climate: monthly averages, rebuilt from public data on a schedule. Expect 2.8 C at the coldest (Jan) and 26.9 C at the warmest (Aug) — a 24.1 C spread. Expect a wet month and a dry month but no real season: 7.07 mm/day in Oct against 2.05 mm/day in Feb. Taken together that is roughly 1,514 mm of rain a year for the grid cell. Because each page is rebuilt independently, one unavailable upstream never takes the rest of the site down. Use the table for exact numbers, or the related pages below for neighbouring locations and periods.
Annual mean temperature 14.8 C
Warmest month Aug (26.9 C)
Coldest month Jan (2.8 C)
Wettest month Oct (7.07 mm/day)
All-time record high 37.8 C
All-time record low -5.1 C
Annual precipitation 1,518 mm / year
Coordinates 35.80521, 139.71072
Population 607,373
Average monthly temperature and rainfall in Kawaguchi
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
2.8
2.06
17.6
-5.1
Feb
3.9
2.05
22.8
-5.1
Mar
7.5
3.29
24.6
-4.6
Apr
12.9
4.02
29.9
-2.4
May
18.1
4.39
33.9
3.8
Jun
21.9
5.37
35.7
9.1
Jul
25.8
5.06
37.8
13.8
Aug
26.9
4.57
37.7
15.5
Sep
23.1
6.60
36.5
8.6
Oct
17.2
7.07
32.2
4.0
Nov
11.2
3.17
24.9
-2.2
Dec
5.3
2.15
22.9
-4.1
What the Kawaguchi climate table shows
Values are multi-decadal climatological averages for the 35.80521, 139.71072 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
Does Kawaguchi get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.