Kawagoe climate

Name: Kawagoe
Address: JP

Kawagoe is warmest in August, with average highs of 30 °C, and coldest in January, when nights average -2.0 °C. October is the wettest month (201 mm) and December the driest (50 mm). Figures are 1991–2020 climate normals.

Across a full year Kawagoe averages 1,432 mm of rain, 95 days above 25 °C and 63 days below freezing.

Japan · population 354,571 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month August 30 °C
Coldest month January -2.0 °C
Driest month December 50 mm
Wettest month October 201 mm
Least cloud January 37 % cloud
Hottest on record July 40 °C
Coldest on record January -16 °C

What to expectKawagoe through the year

Kawagoe has a clear annual cycle: average daily highs run from 7.8 °C in January to 30 °C in August, a swing of 23 °C in mean temperature across the year.

Counted across a normal year, 95 days a year reach 25 °C, 30 of them reach 30 °C, 63 nights drop below freezing. The warmest reading in the 1991–2020 record is 40 °C, in July.

Rain is strongly seasonal. October averages 201 mm against 50 mm in December — 4.1 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	7.8 °C	58 mm	37 %
February	8.8 °C	57 mm	45 %
March	12.4 °C	95 mm	55 %
April	17.6 °C	107 mm	59 %
May	22.2 °C	130 mm	68 %
June	24.8 °C	167 mm	80 %
July	28.4 °C	166 mm	76 %
August	29.7 °C	131 mm	68 %
September	25.8 °C	195 mm	69 %
October	20.3 °C	201 mm	61 %
November	15.2 °C	74 mm	49 %
December	10.2 °C	50 mm	38 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	7.8 °C	-2.0 °C	2.4 °C	17.6 °C	-16.1 °C	0	0	23
February	8.8 °C	-1.1 °C	3.4 °C	21.6 °C	-13.9 °C	0	0	18
March	12.4 °C	2.5 °C	7.1 °C	25.1 °C	-7.9 °C	0	0	8
April	17.6 °C	7.9 °C	12.5 °C	28.8 °C	-2.7 °C	1	0	1
May	22.2 °C	13.1 °C	17.4 °C	32.6 °C	3.2 °C	6	0	0
June	24.8 °C	17.6 °C	20.9 °C	34.3 °C	9.7 °C	14	1	0
July	28.4 °C	21.6 °C	24.7 °C	39.5 °C	14.6 °C	25	11	0
August	29.7 °C	22.7 °C	25.8 °C	36.8 °C	15.7 °C	28	15	0
September	25.8 °C	19.1 °C	22.1 °C	35.6 °C	8.7 °C	18	3	0
October	20.3 °C	13.1 °C	16.4 °C	31.3 °C	3.1 °C	2	0	0
November	15.2 °C	6.6 °C	10.5 °C	23.5 °C	-5.6 °C	0	0	1
December	10.2 °C	0.8 °C	5.1 °C	23.1 °C	-10.7 °C	0	0	13

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	58 mm	6	10.0 h/day	37 %	68 %	18 km/h
February	57 mm	7	11 h/day	45 %	67 %	19 km/h
March	95 mm	11	12 h/day	55 %	70 %	20 km/h
April	107 mm	11	13 h/day	59 %	72 %	20 km/h
May	130 mm	11	14 h/day	68 %	75 %	18 km/h
June	167 mm	15	15 h/day	80 %	82 %	15 km/h
July	166 mm	14	14 h/day	76 %	84 %	14 km/h
August	131 mm	12	14 h/day	68 %	82 %	14 km/h
September	195 mm	14	12 h/day	69 %	81 %	14 km/h
October	201 mm	12	11 h/day	61 %	80 %	14 km/h
November	74 mm	8	10 h/day	49 %	77 %	14 km/h
December	50 mm	6	9.7 h/day	38 %	71 %	16 km/h

How Kawagoe compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Kawagoe	30 °C	-2.0 °C	1,432 mm	95
Niiza · Japan	30 °C	-1.3 °C	1,599 mm	97
Tokorozawa · Japan	29 °C	-2.0 °C	1,616 mm	88
Saitama · Japan	30 °C	-1.4 °C	1,396 mm	100

Planning a trip? See the best time to visit Kawagoe.

QuestionsCommon questions about Kawagoe’s climate

When is the best time to visit Kawagoe?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, September sit closest to 20 °C on average, August is the warmest month and December the driest. The month-by-month table above has the full picture.

How hot does Kawagoe get?

In August, the warmest month, daily highs average 30 °C. About 30 days a year pass 30 °C. The highest value in the 1991–2020 record is 40 °C.

How cold does it get in winter?

Nights average -2.0 °C in January, the coldest month. A normal year has 63 nights below freezing.

Which month is wettest in Kawagoe?

October, averaging 201 mm over 12 days with rain. The driest month is December with 50 mm. The year as a whole averages 1,432 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Kawagoe rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 35.909°, 139.485° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.