Atsugi climate

Name: Atsugi
Address: JP

Atsugi is warmest in August, with average highs of 28 °C, and coldest in January, when nights average 1.8 °C. September is the wettest month (238 mm) and December the driest (75 mm). Figures are 1991–2020 climate normals.

Across a full year Atsugi averages 1,863 mm of rain, 74 days above 25 °C and 16 days below freezing.

Japan · population 223,960 · 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 28 °C
Coldest month January 1.8 °C
Driest month December 75 mm
Wettest month September 238 mm
Least cloud January 42 % cloud
Hottest on record August 34 °C
Coldest on record February -11 °C

What to expectAtsugi through the year

Atsugi has a clear annual cycle: average daily highs run from 8.6 °C in January to 28 °C in August, a swing of 21 °C in mean temperature across the year.

Counted across a normal year, 74 days a year reach 25 °C, 7 of them reach 30 °C, 16 nights drop below freezing. The warmest reading in the 1991–2020 record is 34 °C, in August.

Rain is strongly seasonal. September averages 238 mm against 75 mm in December — 3.2 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	8.6 °C	84 mm	42 %
February	9.1 °C	89 mm	52 %
March	12.0 °C	152 mm	61 %
April	16.4 °C	150 mm	64 %
May	20.3 °C	161 mm	71 %
June	23.0 °C	211 mm	83 %
July	26.5 °C	203 mm	77 %
August	27.9 °C	164 mm	67 %
September	24.9 °C	238 mm	70 %
October	20.1 °C	230 mm	64 %
November	15.5 °C	108 mm	54 %
December	10.9 °C	75 mm	44 %

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	8.6 °C	1.8 °C	4.9 °C	18.3 °C	-7.5 °C	0	0	7
February	9.1 °C	2.1 °C	5.4 °C	19.7 °C	-10.6 °C	0	0	6
March	12.0 °C	5.2 °C	8.5 °C	22.1 °C	-2.3 °C	0	0	1
April	16.4 °C	9.8 °C	13.0 °C	26.1 °C	-0.6 °C	0	0	0
May	20.3 °C	14.5 °C	17.4 °C	28.5 °C	6.7 °C	1	0	0
June	23.0 °C	18.3 °C	20.6 °C	30.3 °C	11.0 °C	6	0	0
July	26.5 °C	22.1 °C	24.2 °C	33.9 °C	16.4 °C	22	2	0
August	27.9 °C	23.3 °C	25.4 °C	34.4 °C	15.7 °C	28	5	0
September	24.9 °C	20.3 °C	22.5 °C	33.9 °C	12.7 °C	16	1	0
October	20.1 °C	15.1 °C	17.5 °C	29.6 °C	7.0 °C	1	0	0
November	15.5 °C	9.7 °C	12.4 °C	22.8 °C	0.4 °C	0	0	0
December	10.9 °C	4.5 °C	7.5 °C	21.8 °C	-4.2 °C	0	0	2

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	84 mm	9	10 h/day	42 %	66 %	12 km/h
February	89 mm	10	11 h/day	52 %	67 %	13 km/h
March	152 mm	15	12 h/day	61 %	71 %	15 km/h
April	150 mm	14	13 h/day	64 %	75 %	16 km/h
May	161 mm	14	14 h/day	71 %	79 %	15 km/h
June	211 mm	17	15 h/day	83 %	85 %	13 km/h
July	203 mm	17	14 h/day	77 %	87 %	13 km/h
August	164 mm	15	14 h/day	67 %	85 %	13 km/h
September	238 mm	15	12 h/day	70 %	82 %	13 km/h
October	230 mm	13	11 h/day	64 %	78 %	13 km/h
November	108 mm	11	10 h/day	54 %	74 %	11 km/h
December	75 mm	8	9.8 h/day	44 %	68 %	12 km/h

How Atsugi 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
Atsugi	28 °C	1.8 °C	1,863 mm	74
Machida · Japan	28 °C	0.4 °C	1,619 mm	75
Fujisawa · Japan	28 °C	3.1 °C	1,601 mm	72
Hadano · Japan	28 °C	1.2 °C	1,862 mm	82
Aihara · Japan	28 °C	-1.5 °C	1,881 mm	80
Hachiōji · Japan	29 °C	-1.9 °C	1,901 mm	85
Yokohama · Japan	28 °C	2.4 °C	1,493 mm	75

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

QuestionsCommon questions about Atsugi’s climate

When is the best time to visit Atsugi?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, September, October 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 Atsugi get?

In August, the warmest month, daily highs average 28 °C. About 7 days a year pass 30 °C. The highest value in the 1991–2020 record is 34 °C.

How cold does it get in winter?

Nights average 1.8 °C in January, the coldest month. A normal year has 16 nights below freezing.

Which month is wettest in Atsugi?

September, averaging 238 mm over 15 days with rain. The driest month is December with 75 mm. The year as a whole averages 1,863 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 Atsugi 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: 35.443°, 139.369° (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.