Tome weather in September

In September, Tome sees average daytime highs of 25°C and overnight lows near 18°C, with 145 mm of rain across 12.4 wet days and about 12.3 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 22°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 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 Tome's 9th-clearest and 9th-windiest month. For the whole year in context, see Tome's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
18°
10th coldest
Rainfall
145 mm
12.4 wet days
Daylight
12 h 12 min
5:22 AM – 5:37 PM
Cloud cover
71%
9th clearest
Wind
8 km/h
9th windiest
Solar energy
3.71 kWh/m²
Travel score
6.1
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 22°C by the end.

A typical September day in Tome reaches about 25°C in the afternoon and slips back to 18°C overnight — a 7°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 3°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12720
22720
32720
42720
52620
62620
72620
82619
92619
102619
112619
122519
132518
142518
152518
162518
172417
182417
192417
202417
212416
222316
232316
242316
252315
262315
272315
282215
292215
302214

How September really feels in Tome

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.

Tome 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 / -2°477.14.39.60.0
Feb / -1°427.33.810.50.4
Mar10° / 8310.3311.72.1
Apr15° / 8810.70.5134.5
May20° / 11°9810.4014.16.1
Jun23° / 16°11111.2014.76.2
Jul26° / 20°15615.1014.45.5
Aug28° / 21°13513.6013.55.3
Sep25° / 18°14512.4012.36.1
Oct19° / 11°1269.30116.2
Nov13° / 587.60.29.93.9
Dec / 528.22.79.31.1

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 12% of September, with mostly cloudy or overcast conditions the remaining 67%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13268
23268
33268
43268
53268
63367
73268
83367
93367
103466
113367
123367
133268
143367
153268
163268
173268
183268
193268
203268
213268
223268
233367
243367
253565
263565
273664
283664
293763
303763

Chance of precipitation in September

Any precipitation

Tome gets around 145 mm of rain over 12.4 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 42% and peaks near 46% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
145
245
346
446
546
646
746
846
946
1045
1145
1245
1344
1444
1543
1643
1742
1841
1941
2040
2139
2239
2338
2438
2538
2637
2737
2837
2937
3036

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 26% of days. Sticky, muggy-or-worse air turns up on roughly 37% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11102335292
21102435272
31112535262
41122535252
51132635242
61142635222
71152635212
82162734202
92172733192
103182733181
114192832171
125202831151
136212829141
148222928131
159232926121
1611242925110
1713252923100
181526292190
191727291980
201928291870
212128281660
222429281450
232630271350
242830271140
253031261030
26323225920
27343324820
28353323710
29373421610
30393420610

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 5:09 AM to 5:35 AM, and sunset from 6:02 PM to 5:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:096:02
212.85:096:00
312.85:105:58
412.85:115:57
512.75:125:55
612.75:135:54
712.65:145:52
812.65:155:50
912.55:165:49
1012.55:175:47
1112.55:185:45
1212.45:195:44
1312.45:205:42
1412.35:205:40
1512.35:215:39
1612.25:225:37
1712.25:235:35
1812.25:245:34
1912.15:255:32
2012.15:265:30
2112.05:275:29
2212.05:285:27
2311.95:295:26
2411.95:305:24
2511.95:315:22
2611.85:325:21
2711.85:325:19
2811.75:335:17
2911.75:345:16
3011.65:355:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.71 kWh/m².

For context, solar energy here swings from a low near 2.07 kWh/m² to a high of 5.42 kWh/m² in May across the year — September's 3.71 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
14.0Bright
24.0Moderate
34.0Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.8Moderate
83.8Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.4Moderate
303.4Moderate
Planning a trip in September

Hazard calendar for Tome

In seasonPeak

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

Tome 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 Tome?

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

6.1
Sightseeing
3rd-best month of the year
5.3
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Tome for sightseeing.

What to pack for Tome in September

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

In September, Tome sees daytime highs around 25°C and nights near 18°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Tome in September

The nearest coast averages about 22°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 42 km away) is warmest in August at about 23°C and coldest in March near 8°C.

It's comfortable for a long swim from Jul 10 to Oct 8 — about 3 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb9Bracing
Mar8Bracing
Apr10Bracing
May13Bracing
Jun17Cool
Jul21Refreshing
Aug23Refreshing
Sep22Refreshing
Oct19Cool
Nov16Cool
Dec14Bracing

UV index in Tome in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tome peaks around August 18 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 highVery highModerateLowAug 18UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul6High
Aug9Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Tome 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 Tome is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1620 µg/m³Dec 1710 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb14Moderate
Mar19Moderate
Apr20Moderate
May19Moderate
Jun14Moderate
Jul12Moderate
Aug11Good
Sep11Good
Oct11Good
Nov11Good
Dec9Good
Location & terrain

Where is Tome?

Tome sits at 38.7°N, 141.2°E, 6 m above sea level, in Japan. The nearest listed city is Kurihara, 14 km away.

Topography around Tome

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

Within 3 km, the terrain around Tome has only modest variations in elevation — a maximum elevation change of 51 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 366 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,619 m.

The land around Tome is covered by cropland (52%) and trees (21%) within 3 km, trees (43%) and cropland (43%) within 16 km, and trees (57%) and water (28%) within 80 km.

3 km
51 m
16 km
366 m
80 km
1,619 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Kurihara 14 km · Wakuya 18 km · Kogota 20 km · Ōsaki 21 km · Kogota-ekimae 21 km · Furukawa 23 km · Ichinoseki 23 km · Naka-niida 31 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 Tome (38.7088°, 141.1558°, elevation 6 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).