Ueda weather in September

In September, Ueda sees average daytime highs of 24°C and overnight lows near 15°C, with 161 mm of rain across 15.3 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 3rd-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 21% of the time in September, and the air most often feels humid.

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

Daytime high
24°
3rd warmest
Overnight low
15°
10th coldest
Rainfall
161 mm
15.3 wet days
Daylight
12 h 12 min
5:34 AM – 5:48 PM
Cloud cover
68%
10th clearest
Wind
5 km/h
9th windiest
Solar energy
3.94 kWh/m²
Travel score
5.7
out of 10

Ueda is city in Nagano Prefecture, Japan.

Density
285/km²
people per km²
Founded
2006

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 Ueda 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°20°30°151015202530
Avg high (°C)Avg low (°C)
12618
22618
32618
42617
52617
62617
72517
82517
92517
102516
112516
122416
132416
142416
152415
162415
172315
182315
192314
202314
212214
222214
232214
242213
252213
262113
272113
282112
292112
302112

How September really feels in Ueda

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.

Ueda weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°9016.518.29.80.0
Feb / -5°8413.613.810.60.0
Mar / -2°11815.311.611.71.1
Apr14° / 10713.5312.93.9
May20° / 12313.90.113.95.7
Jun23° / 14°16817.2014.45.4
Jul27° / 18°20920.3014.24.9
Aug28° / 19°13416.2013.45.1
Sep24° / 15°16115.3012.25.7
Oct18° / 15014.20.111.15.1
Nov12° / 8712.93.810.12.8
Dec / -3°8816.114.59.60.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24159
34159
44159
54159
64159
74159
84060
94159
104060
114060
124060
133961
143961
153862
163862
173862
183862
193763
203763
213763
223763
233862
243862
253862
263862
273862
283862
293961
303961

Chance of precipitation in September

Any precipitation

Ueda gets around 161 mm of rain over 15.3 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 52% and peaks near 55% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
155
255
355
455
555
655
755
854
954
1054
1153
1253
1352
1452
1552
1651
1751
1851
1950
2050
2150
2249
2349
2449
2549
2649
2750
2850
2950
3050

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
162451181
262551171
372650161
472751150
582751140
692849130
7102948120
8123047110
9133146100
1014324490
1116334380
1218334180
1320343970
1422343760
1525353550
1627353350
1730353140
1833352840
1936352630
2039342430
2143342120
2246331920
2349321720
2451321520
2555311310
2658301110
2760291010
286228910
296527710
306726610

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
512.75:256:05
612.65:266:03
712.65:276:02
812.55:286:00
912.55:295:59
1012.55:295:57
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
2611.85:435:32
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 3.94 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.72 kWh/m² in May across the year — September's 3.94 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.3Bright
44.3Bright
54.3Bright
64.2Bright
74.2Bright
84.2Bright
94.1Bright
104.1Bright
114.0Bright
124.0Bright
134.0Moderate
144.0Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.8Moderate
193.8Moderate
203.8Moderate
213.8Moderate
223.7Moderate
233.7Moderate
243.7Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.5Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Ueda?

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

5.7
Sightseeing
1st-best month of the year
4.6
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Ueda for sightseeing.

What to pack for Ueda in September

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

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

rain gearlight clothes

UV index in Ueda 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 Ueda 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 Ueda 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 Ueda is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 1510 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug13Moderate
Sep12Good
Oct11Good
Nov11Good
Dec10Good
Location & terrain

Where is Ueda?

Ueda sits at 36.4°N, 138.3°E, 536 m above sea level, in Japan. The nearest listed city is Tōmi, 9.0 km away.

Topography around Ueda

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

Within 3 km, the terrain around Ueda has significant variations in elevation — a maximum elevation change of 594 m around an average of 559 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,841 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,130 m.

The land around Ueda is covered by artificial surfaces (46%) and trees (27%) within 3 km, trees (71%) within 16 km, and trees (84%) within 80 km.

3 km
594 m
16 km
1,841 m
80 km
3,130 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Tōmi 9.0 km · Kamimaruko 9.0 km · Sakaki 11 km · Komoro 17 km · Miyota 22 km · Chikuma 22 km · Saku 27 km · Suzaka 28 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 Ueda (36.4027°, 138.2816°, elevation 536 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).