Tōno weather in September

In September, Tōno sees average daytime highs of 22°C and overnight lows near 15°C, with 172 mm of rain across 14.1 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 20°C by the end. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Tōno's 9th-clearest and 9th-windiest month. For the whole year in context, see Tōno's year-round climate.

Daytime high
22°
3rd warmest
Overnight low
15°
10th coldest
Rainfall
172 mm
14.1 wet days
Daylight
12 h 18 min
5:21 AM – 5:36 PM
Cloud cover
72%
9th clearest
Wind
8 km/h
9th windiest
Solar energy
3.65 kWh/m²
Travel score
5.8
out of 10

Tōno is city in Iwate Prefecture, Japan.

Density
32/km²
people per km²
Founded
1954

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 24°C in the first days to 20°C by the end.

A typical September day in Tōno reaches about 22°C in the afternoon and slips back to 15°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 26°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)
12518
22418
32418
42418
52418
62418
72417
82417
92317
102317
112317
122316
132316
142316
152216
162215
172215
182215
192215
202114
212114
222114
232114
242113
252013
262013
272013
282012
292012
301912

How September really feels in Tōno

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.

Tōno weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -6°548.689.50.0
Feb / -6°508.37.510.50.0
Mar / -2°9512.17.211.70.6
Apr13° / 102132.1133.2
May17° / 11712.4014.15.2
Jun21° / 14°12912.9014.75.6
Jul24° / 18°16716014.55.6
Aug26° / 19°16415.5013.55.7
Sep22° / 15°17214.1012.35.8
Oct17° / 13511.20115.0
Nov10° / 7410.51.49.82.4
Dec / -2°6410.26.69.30.1

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 12% of September, with mostly cloudy or overcast conditions the remaining 69%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12872
22872
32872
42971
52971
62872
72971
82971
93070
103070
113070
123070
133070
143169
153169
163070
173070
183070
193169
203169
213169
223268
233268
243367
253466
263466
273565
283565
293565
303565

Chance of precipitation in September

Any precipitation

Tōno gets around 172 mm of rain over 14.1 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 53% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
151
252
352
452
553
653
753
853
953
1052
1152
1252
1351
1450
1549
1649
1748
1847
1946
2045
2144
2243
2342
2442
2541
2641
2740
2840
2940
3040

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 26% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1417353014
2417353014
3418352913
4519352912
5520352811
6620352811
7721352710
882235269
9102334258
10112434248
11132533227
12152532216
13172632206
14192731185
15212830175
16242828154
17272927144
18292926123
19322924113
20353023102
2138302292
2241302082
2343301972
2446301761
2549291651
2651291541
2753291341
2857281230
2958281130
3061271020

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:06 AM to 5:34 AM, and sunset from 6:01 PM to 5:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:066:01
212.95:075:59
312.85:085:57
412.85:095:56
512.75:105:54
612.75:115:53
712.65:125:51
812.65:135:49
912.65:145:48
1012.55:155:46
1112.55:165:44
1212.45:175:43
1312.45:185:41
1412.35:195:39
1512.35:205:37
1612.35:215:36
1712.25:225:34
1812.25:225:32
1912.15:235:31
2012.15:245:29
2112.05:255:27
2212.05:265:26
2311.95:275:24
2411.95:285:22
2511.95:295:21
2611.85:305:19
2711.85:315:17
2811.75:325:16
2911.75:335:14
3011.65:345:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.65 kWh/m².

For context, solar energy here swings from a low near 2.07 kWh/m² to a high of 5.38 kWh/m² in May across the year — September's 3.65 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
14.0Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.8Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.7Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.4Moderate
303.4Moderate
Planning a trip in September

Hazard calendar for Tōno

In seasonPeak

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

Tōno 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 Tōno?

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

5.8
Sightseeing
1st-best month of the year
4.0
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Tōno for sightseeing.

What to pack for Tōno in September

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

In September, Tōno sees daytime highs around 22°C and nights near 15°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.

rain gearlight clothes

Sea temperature near Tōno in September

The nearest coast averages about 21°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 36 km away) is warmest in August at about 22°C and coldest in March near 7°C.

It's comfortable for a long swim from Jul 26 to Oct 1 — about 2.2 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb8Bracing
Mar7Bracing
Apr9Bracing
May12Bracing
Jun16Cool
Jul19Cool
Aug22Refreshing
Sep21Refreshing
Oct19Cool
Nov16Cool
Dec13Bracing

UV index in Tōno in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tōno peaks around August 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 19UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul6High
Aug9Very high
Sep7Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Tōno 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 Tōno is worst in April — around 19 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1319 µg/m³Dec 179 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar18Moderate
Apr19Moderate
May17Moderate
Jun12Moderate
Jul11Good
Aug9Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Tōno?

Tōno sits at 39.3°N, 141.5°E, 328 m above sea level, in Japan. The nearest listed city is Kamaishi, 29 km away.

Topography around Tōno

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

Within 3 km, the terrain around Tōno has large variations in elevation — a maximum elevation change of 667 m around an average of 405 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,177 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,980 m.

The land around Tōno is covered by trees (70%) within 3 km, trees (89%) within 16 km, and trees (66%) and water (25%) within 80 km.

3 km
667 m
16 km
1,177 m
80 km
1,980 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Kamaishi 29 km · Ōfunato 31 km · Rikuzen-Takata 35 km · Kitakami 36 km · Hanamaki 37 km · Ōshū 37 km · Kanegasaki 38 km · Yamada 40 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 Tōno (39.3167°, 141.5333°, elevation 328 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).