Kamimaruko weather in September

In September, Kamimaruko sees average daytime highs of 24°C and overnight lows near 15°C, with 137 mm of rain across 11.7 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 21°C by the end. The sky is clear or mostly clear about 22% of the time in September, and the air most often feels dry.

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 Kamimaruko's 10th-clearest and 9th-windiest month. For the whole year in context, see Kamimaruko's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
15°
10th coldest
Rainfall
137 mm
11.7 wet days
Daylight
12 h 12 min
5:34 AM – 5:48 PM
Cloud cover
66%
10th clearest
Wind
5 km/h
9th windiest
Solar energy
4.05 kWh/m²
Travel score
6.3
out of 10

Kamimaruko is human settlement in Japan.

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 26°C in the first days to 21°C by the end.

A typical September day in Kamimaruko reaches about 24°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 28°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12618
22617
32617
42617
52617
62517
72517
82517
92516
102516
112516
122416
132416
142416
152415
162415
172315
182315
192314
202314
212214
222214
232214
242213
252113
262113
272113
282112
292112
302012

How September really feels in Kamimaruko

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.

Kamimaruko weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -6°629.810.19.80.0
Feb / -5°659.48.210.60.0
Mar / -2°10712.47.311.71.3
Apr14° / 10011.41.812.94.2
May20° / 10811.1013.96.1
Jun23° / 14°14113.7014.45.8
Jul26° / 18°16114.5014.25.7
Aug28° / 19°9811.5013.45.9
Sep24° / 15°13711.7012.26.3
Oct17° / 14310.8011.15.5
Nov12° / 7091.110.13.1
Dec / -2°599.679.60.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24159
34159
44159
54159
64159
74258
84258
94258
104159
114159
124159
134060
144060
154060
163961
173961
183961
193961
203961
213961
223862
233961
243961
253961
263961
274060
284060
293961
304060

Chance of precipitation in September

Any precipitation

Kamimaruko gets around 137 mm of rain over 11.7 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 40% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
141
241
341
441
541
641
741
840
940
1039
1139
1239
1338
1438
1538
1638
1738
1838
1938
2039
2139
2239
2339
2440
2540
2641
2741
2841
2942
3042

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
18295112
29295012
39304911
410314811
511324610
612334510
71434439
81534429
91635408
101836397
112036377
122236366
132436345
142736325
152936314
163235294
173534273
183834253
194233232
204532212
214831202
225030182
235429161
245728141
256027121
266226111
27652591
28672481
29702370
30722260

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:22 AM to 5:46 AM, and sunset from 6:11 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:226:11
212.85:236:09
312.75:246:08
412.75:256:06
512.75:266:05
612.65:266:03
712.65:276:02
812.55:286:00
912.55:295:59
1012.55:305:57
1112.45:305:56
1212.45:315:54
1312.35:325:53
1412.35:335:51
1512.35:345:50
1612.25:345:48
1712.25:355:46
1812.15:365:45
1912.15:375:43
2012.15:385:42
2112.05:385:40
2212.05:395:39
2312.05:405:37
2411.95:415:36
2511.95:425:34
2611.85:435:33
2711.85:435:31
2811.85:445:29
2911.75:455:28
3011.75:465:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.05 kWh/m².

For context, solar energy here swings from a low near 2.51 kWh/m² to a high of 5.79 kWh/m² in May across the year — September's 4.05 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.4Bright
54.4Bright
64.3Bright
74.3Bright
84.3Bright
94.2Bright
104.2Bright
114.2Bright
124.1Bright
134.1Bright
144.1Bright
154.0Bright
164.0Bright
174.0Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.6Moderate
303.6Moderate
Planning a trip in September

Is September a good time to visit Kamimaruko?

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

6.3
Sightseeing
1st-best month of the year
5.0
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Kamimaruko for sightseeing.

What to pack for Kamimaruko in September

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

In September, Kamimaruko sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

UV index in Kamimaruko 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 Kamimaruko peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 18UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May9Very high
Jun10Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Kamimaruko 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 Kamimaruko is worst in April — around 18 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1918 µg/m³Dec 178 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar17Moderate
Apr18Moderate
May17Moderate
Jun16Moderate
Jul13Moderate
Aug12Good
Sep10Good
Oct10Good
Nov9Good
Dec8Good
Location & terrain

Where is Kamimaruko?

Kamimaruko sits at 36.3°N, 138.3°E, 563 m above sea level, in Japan. The nearest listed city is Tōmi, 9.0 km away.

Topography around Kamimaruko

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

Within 3 km, the terrain around Kamimaruko has significant variations in elevation — a maximum elevation change of 492 m around an average of 657 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,636 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,137 m.

The land around Kamimaruko is covered by trees (60%) within 3 km, trees (67%) within 16 km, and trees (84%) within 80 km.

3 km
492 m
16 km
1,636 m
80 km
3,137 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Tōmi 9.0 km · Ueda 9.0 km · Komoro 14 km · Sakaki 18 km · Miyota 22 km · Saku 22 km · Chikuma 28 km · Matsumoto 29 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 Kamimaruko (36.3186°, 138.2733°, elevation 563 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. 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).