Natori-shi weather in September

In September, Natori-shi sees average daytime highs of 23°C and overnight lows near 19°C, with 179 mm of rain across 13.9 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 25°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 54 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Natori-shi's 9th-clearest and 9th-windiest month. For the whole year in context, see Natori-shi's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
179 mm
13.9 wet days
Daylight
12 h 12 min
5:24 AM – 5:38 PM
Cloud cover
69%
9th clearest
Wind
12 km/h
9th windiest
Solar energy
3.6 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 25°C in the first days to 21°C by the end.

A typical September day in Natori-shi reaches about 23°C in the afternoon and slips back to 19°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 26°C. Set against its neighbours, September runs about 2°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12522
22521
32521
42521
52521
62521
72521
82421
92421
102420
112420
122420
132420
142420
152420
162319
172319
182319
192319
202319
212318
222218
232218
242218
252218
262217
272217
282117
292117
302117

How September really feels in Natori-shi

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.

Natori-shi 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 / 568.14.39.60.1
Feb / 477.43.710.50.3
Mar / 9110.62.511.71.6
Apr13° / 10010.50.4133.5
May17° / 12°11310.70145.3
Jun20° / 17°13413014.65.6
Jul24° / 21°18916.3014.45.6
Aug26° / 22°16214.9013.55.8
Sep23° / 19°17913.9012.36.0
Oct19° / 14°15911.20115.8
Nov13° / 677.909.94.0
Dec / 558.62.59.41.4

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 13% of September, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23664
33664
43664
53763
63763
73763
83664
93763
103664
113664
123664
133466
143466
153466
163367
173367
183268
193268
203268
213268
223367
233367
243466
253466
263565
273664
283664
293664
303664

Chance of precipitation in September

Any precipitation

Natori-shi gets around 179 mm of rain over 13.9 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 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
150
250
350
450
550
650
750
850
950
1050
1149
1249
1349
1448
1548
1648
1747
1847
1946
2045
2145
2244
2344
2443
2543
2643
2743
2843
2943
3042

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 28% of days. Sticky, muggy-or-worse air turns up on roughly 46% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1041638357
2041738356
3041838346
4051938335
5162037324
6162137314
7172137303
8182237293
9192336283
102102436262
112112535252
123122634232
134132734211
145142832201
156162931181
167173030161
178183128140
189193227130
1910203325110
2012213423100
211323342280
221524342070
231625351860
241826351750
251927341540
262128341430
272229331320
282430321120
292631311010
30273230910

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 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 72 minutes over September. Sunrise moves from 5:10 AM to 5:36 AM, and sunset from 6:02 PM to 5:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:106:02
212.85:116:01
312.85:125:59
412.75:135:57
512.75:145:56
612.75:155:54
712.65:165:53
812.65:165:51
912.55:175:49
1012.55:185:48
1112.55:195:46
1212.45:205:45
1312.45:215:43
1412.35:225:41
1512.35:235:40
1612.25:245:38
1712.25:245:36
1812.25:255:35
1912.15:265:33
2012.15:275:32
2112.05:285:30
2212.05:295:28
2311.95:305:27
2411.95:315:25
2511.95:325:23
2611.85:335:22
2711.85:335:20
2811.75:345:19
2911.75:355:17
3011.75:365:15

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.6 kWh/m².

For context, solar energy here swings from a low near 2.13 kWh/m² to a high of 5.38 kWh/m² in May across the year — September's 3.6 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.8Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.7Moderate
83.7Moderate
93.7Moderate
103.7Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.4Moderate
243.4Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Hazard calendar for Natori-shi

In seasonPeak

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

Natori-shi sits in the Pacific typhoon belt; the season peaks July–October.

Natori-shi's rainy season runs March–October, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Natori-shi?

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
4.7
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Natori-shi for sightseeing.

What to pack for Natori-shi in September

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

In September, Natori-shi sees daytime highs around 23°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.

rain gearlight clothes

Sea temperature near Natori-shi 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 22 km away) is warmest in August at about 24°C and coldest in March near 9°C.

It's comfortable for a long swim from Jul 7 to Oct 10 — about 3.2 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb9Bracing
Mar9Bracing
Apr10Bracing
May14Bracing
Jun18Cool
Jul21Refreshing
Aug24Refreshing
Sep23Refreshing
Oct19Cool
Nov17Cool
Dec14Bracing

UV index in Natori-shi 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 Natori-shi peaks around August 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 13UV 9Jan 10UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug9Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Natori-shi 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 Natori-shi is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1621 µg/m³Dec 1710 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun14Moderate
Jul12Good
Aug10Good
Sep10Good
Oct11Good
Nov11Good
Dec9Good
Location & terrain

Where is Natori-shi?

Natori-shi sits at 38.2°N, 140.9°E, 9 m above sea level, in Japan. The nearest listed city is Iwanuma, 7.0 km away.

Topography around Natori-shi

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

Within 3 km, the terrain around Natori-shi has only modest variations in elevation — a maximum elevation change of 62 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 383 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,037 m.

The land around Natori-shi is covered by artificial surfaces (45%) and cropland (41%) within 3 km, trees (29%), water (26%) and artificial surfaces (24%) within 16 km, and trees (55%) and water (27%) within 80 km.

3 km
62 m
16 km
383 m
80 km
2,037 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Iwanuma 7.0 km · Sendai 11 km · Murata 15 km · Watari 15 km · Tagajō-shi 18 km · Ōkawara 18 km · Rifu 20 km · Shōbudahama 20 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 Natori-shi (38.1667°, 140.8833°, elevation 9 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).