Mito weather in September

In September, Mito sees average daytime highs of 25°C and overnight lows near 21°C, with 176 mm of rain across 14.1 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 22% 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 Mito's 9th-clearest and 7th-windiest month. For the whole year in context, see Mito's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
176 mm
14.1 wet days
Daylight
12 h 12 min
5:26 AM – 5:39 PM
Cloud cover
67%
9th clearest
Wind
13 km/h
7th windiest
Solar energy
3.95 kWh/m²
Travel score
6.0
out of 10

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 Mito reaches about 25°C in the afternoon and slips back to 21°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 28°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12723
22723
32723
42623
52623
62622
72622
82622
92622
102622
112622
122622
132522
142521
152521
162521
172521
182521
192421
202420
212420
222420
232420
242320
252320
262319
272319
282319
292319
302319

How September really feels in Mito

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.

Mito 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 / 737.61.39.81.7
Feb / 718.11.610.61.8
Mar12° / 126130.911.72.9
Apr16° / 10°12412.40.112.94.7
May20° / 15°14812.6013.95.8
Jun23° / 18°15914.1014.45.7
Jul26° / 22°16214.9014.25.7
Aug28° / 23°11112.1013.46.0
Sep25° / 21°17614.1012.26.0
Oct20° / 16°21313.5011.15.8
Nov16° / 11°10610.5010.14.8
Dec11° / 718.60.29.62.9

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 16% of September, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34258
44258
54159
64159
74159
84159
94159
104060
113961
123961
133961
143763
153862
163763
173763
183565
193565
203565
213565
223466
233466
243565
253565
263565
273664
283763
293763
303862

Chance of precipitation in September

Any precipitation

Mito gets around 176 mm of rain over 14.1 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 47% and peaks near 49% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
145
246
346
447
547
647
748
848
948
1048
1148
1248
1348
1448
1549
1648
1748
1848
1948
2048
2148
2247
2347
2447
2547
2647
2746
2846
2946
3046

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101831519
201932509
301933498
4011033488
5011134477
6021234456
7021335446
8031435435
9131535415
10141636394
11151736384
12151836364
13261936343
14272035323
15382135302
16492335282
175102434262
185112534241
196122533221
207142632201
218152732181
229162831160
2310172930140
2411183029130
2512183128110
261319312790
271320322680
281420332570
291521342460
301721342350

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

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 5:14 AM to 5:37 AM, and sunset from 6:02 PM to 5:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:146:02
212.85:146:01
312.75:155:59
412.75:165:58
512.75:175:56
612.65:185:55
712.65:185:53
812.55:195:52
912.55:205:50
1012.55:215:49
1112.45:225:47
1212.45:225:46
1312.35:235:44
1412.35:245:42
1512.35:255:41
1612.25:265:39
1712.25:275:38
1812.15:275:36
1912.15:285:35
2012.15:295:33
2112.05:305:32
2212.05:315:30
2312.05:315:28
2411.95:325:27
2511.95:335:25
2611.85:345:24
2711.85:355:22
2811.85:365:21
2911.75:365:19
3011.75:375:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.95 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.38 kWh/m² in May across the year — September's 3.95 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.4Bright
44.4Bright
54.4Bright
64.3Bright
74.3Bright
84.3Bright
94.2Bright
104.2Bright
114.1Bright
124.1Bright
134.0Bright
144.0Bright
154.0Moderate
163.9Moderate
173.9Moderate
183.8Moderate
193.8Moderate
203.8Moderate
213.7Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.4Moderate
303.4Moderate
Planning a trip in September

Hazard calendar for Mito

In seasonPeak

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

Mito 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 Mito?

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

6.0
Sightseeing
1st-best month of the year
5.3
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Mito for sightseeing.

What to pack for Mito in September

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

In September, Mito sees daytime highs around 25°C and nights near 21°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.

rain gearlight clothes

Sea temperature near Mito in September

The nearest coast averages about 23°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 16 km away) is warmest in August at about 24°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 24 to Oct 28 — about 4.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Mito in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mito peaks around July 24 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 24UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Mito 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 Mito is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2425 µg/m³Dec 1914 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar25Moderate
Apr25Moderate
May24Moderate
Jun19Moderate
Jul16Moderate
Aug15Moderate
Sep15Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Mito?

Mito sits at 36.4°N, 140.4°E, 28 m above sea level, in Japan. The nearest listed city is Okunoya, 8.0 km away.

Topography around Mito

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

Within 3 km, the terrain around Mito has only modest variations in elevation — a maximum elevation change of 50 m around an average of 29 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 201 m; within 80 km, large variations in elevation — a maximum elevation change of 1,005 m.

The land around Mito is covered by artificial surfaces (71%) within 3 km, trees (33%), cropland (27%) and artificial surfaces (26%) within 16 km, and trees (38%), water (24%) and cropland (21%) within 80 km.

3 km
50 m
16 km
201 m
80 km
1,005 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Okunoya 8.0 km · Katsuta 8.0 km · Hitachi-Naka 9.0 km · Inada 11 km · Omitama 12 km · Ōarai 13 km · Tomobe 13 km · Ishitsuka 16 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 Mito (36.35°, 140.45°, elevation 28 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).