Atsugi weather in September

In September, Atsugi sees average daytime highs of 25°C and overnight lows near 19°C, with 229 mm of rain across 16.1 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 23°C by the end. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Atsugi's 9th-clearest and 4th-windiest month. For the whole year in context, see Atsugi's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
229 mm
16.1 wet days
Daylight
12 h 12 min
5:30 AM – 5:43 PM
Cloud cover
69%
9th clearest
Wind
7 km/h
4th windiest
Solar energy
3.72 kWh/m²
Travel score
5.6
out of 10

Atsugi is city in Kanagawa prefecture, Japan.

Density
2,387/km²
people per km²
Founded
1955

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 23°C by the end.

A typical September day in Atsugi reaches about 25°C in the afternoon and slips back to 19°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 29°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12822
22722
32721
42721
52721
62721
72721
82721
92621
102620
112620
122620
132620
142620
152520
162519
172519
182519
192519
202419
212418
222418
232418
242418
252318
262317
272317
282317
292317
302317

How September really feels in Atsugi

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Atsugi weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°828.53.39.91.5
Feb / 8410.13.510.71.7
Mar12° / 15415.42.311.72.8
Apr17° / 14714.40.312.94.7
May21° / 13°15813.6013.85.8
Jun24° / 18°20316.4014.35.4
Jul28° / 22°20517.4014.15.0
Aug29° / 23°16116.3013.34.8
Sep25° / 19°22916.1012.25.6
Oct20° / 14°23114.6011.15.6
Nov15° / 11011.7010.14.5
Dec11° / 768.80.59.72.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23664
33664
43664
53664
63664
73565
83565
93565
103466
113565
123565
133565
143565
153466
163466
173466
183367
193367
203466
213367
223367
233367
243367
253367
263367
273367
283367
293367
303466

Chance of precipitation in September

Any precipitation

Atsugi gets around 229 mm of rain over 16.1 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 54% and peaks near 55% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
154
254
354
454
554
654
755
855
955
1055
1155
1255
1355
1454
1554
1654
1754
1854
1954
2054
2154
2253
2353
2453
2553
2653
2754
2854
2954
3054

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 55% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1021235492
2021236482
3021336472
4021337452
5031437442
6041537421
7041638411
8151738391
9161838371
10171938351
11282038321
12282137301
13392337280
143102436260
154112635230
165122734210
176132833190
187153032170
198163130150
209173229130
2110183327110
2211203426100
231221342480
241322352370
251423352160
261524362050
271625361840
281726361730
291927351630
302028351520

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 5:19 AM to 5:41 AM, and sunset from 6:06 PM to 5:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:196:06
212.75:196:04
312.75:206:03
412.75:216:01
512.65:226:00
612.65:235:58
712.65:235:57
812.55:245:56
912.55:255:54
1012.45:265:53
1112.45:265:51
1212.45:275:50
1312.35:285:48
1412.35:295:46
1512.35:295:45
1612.25:305:43
1712.25:315:42
1812.15:325:40
1912.15:335:39
2012.15:335:37
2112.05:345:36
2212.05:355:34
2312.05:365:33
2411.95:365:31
2511.95:375:30
2611.85:385:28
2711.85:395:27
2811.85:405:25
2911.75:405:24
3011.75:415:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.72 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.09 kWh/m² in May across the year — September's 3.72 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.2Bright
34.2Bright
44.2Bright
54.1Bright
64.1Bright
74.0Bright
84.0Bright
94.0Moderate
103.9Moderate
113.9Moderate
123.8Moderate
133.8Moderate
143.8Moderate
153.7Moderate
163.7Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.4Moderate
243.4Moderate
253.4Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.2Moderate
303.2Moderate
Planning a trip in September

Hazard calendar for Atsugi

In seasonPeak

In September, Atsugi sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Atsugi sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Atsugi?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.6
Sightseeing
2nd-best month of the year
5.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Atsugi for sightseeing.

What to pack for Atsugi in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Atsugi sees daytime highs around 25°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 16 days see rain.

rain gearlight clothes

Sea temperature near Atsugi in September

The nearest coast averages about 25°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 35 km away) is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Nov 26 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Atsugi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Atsugi peaks around July 16 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 16UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Atsugi in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Atsugi is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1525 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb25Moderate
Mar23Moderate
Apr26Moderate
May21Moderate
Jun18Moderate
Jul13Moderate
Aug12Moderate
Sep12Moderate
Oct14Moderate
Nov14Moderate
Dec12Good
Location & terrain

Where is Atsugi?

Atsugi sits at 35.4°N, 139.4°E, 26 m above sea level, in Japan. The nearest listed city is Ayase, 5.0 km away.

Topography around Atsugi

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Atsugi.

Within 3 km, the terrain around Atsugi has only modest variations in elevation — a maximum elevation change of 65 m around an average of 27 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,245 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Atsugi is covered by artificial surfaces (72%) within 3 km, artificial surfaces (51%) and trees (35%) within 16 km, and trees (44%), water (27%) and artificial surfaces (22%) within 80 km.

3 km
65 m
16 km
1,245 m
80 km
3,737 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ayase 5.0 km · Zama 5.0 km · Isehara 7.0 km · Ebina 7.0 km · Nihammatsu 8.0 km · Yamato 8.0 km · Minamirinkan 9.0 km · Minawa 10 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Atsugi (35.4427°, 139.3693°, elevation 26 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).