Nayoro weather in September

In September, Nayoro sees average daytime highs of 19°C and overnight lows near 10°C, with 139 mm of rain across 14.9 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 22°C in the first days to 17°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 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Nayoro's 4th-clearest and 9th-windiest month. For the whole year in context, see Nayoro's year-round climate.

Daytime high
19°
3rd warmest
Overnight low
10°
10th coldest
Rainfall
139 mm
14.9 wet days
Daylight
12 h 18 min
5:15 AM – 5:34 PM
Cloud cover
68%
4th clearest
Wind
10 km/h
9th windiest
Solar energy
3.52 kWh/m²
Travel score
5.2
out of 10

Nayoro is city in Hokkaido, Japan.

Density
51/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 22°C in the first days to 17°C by the end.

A typical September day in Nayoro reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 23°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12214
22214
32213
42113
52113
62113
72113
82112
92112
102012
112012
122011
132011
142011
151911
161910
171910
181910
191810
20189
21189
22189
23189
24178
25178
26178
27178
28178
29167
30167

How September really feels in Nayoro

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.

Nayoro 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-5° / -12°6114.719.190.0
Feb-4° / -12°5212.516.310.20.0
Mar / -7°6914.215.611.60.0
Apr / -1°7413.57.813.21.3
May15° / 8912.90.914.64.1
Jun19° / 10°9112.8015.35.4
Jul22° / 14°13614.60155.8
Aug23° / 15°14914.5013.85.8
Sep19° / 10°13914.9012.35.2
Oct13° / 11615.61.410.83.0
Nov / -3°11418.214.19.40.3
Dec-3° / -9°901821.88.70.0

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 18% of September, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13367
23367
33367
43268
53268
63268
73367
83466
93466
103466
113466
123565
133565
143664
153664
163862
173862
183862
193961
204060
214060
224060
234060
244159
254159
264159
274159
284258
294258
304258

Chance of precipitation in September

Any precipitation

Nayoro gets around 139 mm of rain over 14.9 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 49% and peaks near 50% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
147
248
348
449
549
649
749
850
950
1050
1150
1250
1350
1450
1550
1650
1749
1849
1949
2049
2149
2249
2349
2449
2549
2649
2749
2849
2949
3049

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 62% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
127332910
229332810
33134269
43234258
53434238
63734217
73934197
84234186
94433166
104733155
115032135
125231125
135530114
14592894
15622783
16652573
17672373
18712162
19741952
20761842
21781642
22821431
23831331
24851221
25871021
2689911
2790910
2891810
2993700
3094600

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 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 90 minutes over September. Sunrise moves from 4:58 AM to 5:32 AM, and sunset from 6:02 PM to 5:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.14:586:02
213.04:596:00
313.05:005:59
412.95:015:57
512.95:025:55
612.85:035:53
712.85:055:51
812.75:065:49
912.75:075:47
1012.65:085:45
1112.65:095:43
1212.55:115:41
1312.55:125:39
1412.45:135:37
1512.45:145:36
1612.35:155:34
1712.25:175:32
1812.25:185:30
1912.15:195:28
2012.15:205:26
2112.05:215:24
2212.05:235:22
2311.95:245:20
2411.95:255:18
2511.85:265:16
2611.85:285:14
2711.75:295:12
2811.75:305:10
2911.65:315:08
3011.65:325:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.52 kWh/m².

For context, solar energy here swings from a low near 1.48 kWh/m² to a high of 5.29 kWh/m² in May across the year — September's 3.52 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
103.6Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.3Moderate
233.3Moderate
243.3Moderate
253.3Moderate
263.3Moderate
273.2Moderate
283.2Moderate
293.2Moderate
303.1Moderate
Planning a trip in September

Hazard calendar for Nayoro

In seasonPeak

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

Nayoro 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 Nayoro?

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

5.2
Sightseeing
4th-best month of the year
2.4
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Nayoro for sightseeing.

What to pack for Nayoro in September

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

In September, Nayoro sees daytime highs around 19°C and nights near 10°C. Pack rain gear. About 15 days see rain.

rain gear

Sea temperature near Nayoro in September

The nearest coast averages about 17°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 45 km away) is warmest in August at about 18°C and coldest in February near -0°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan0Bracing
Feb0Bracing
Mar0Bracing
Apr2Bracing
May5Bracing
Jun10Bracing
Jul14Bracing
Aug18Cool
Sep17Cool
Oct13Bracing
Nov7Bracing
Dec3Bracing

UV index in Nayoro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nayoro peaks around August 14 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowAug 14UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr6High
May7Very high
Jun7High
Jul7Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Nayoro 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 Nayoro is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1516 µg/m³Dec 197 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb10Good
Mar15Moderate
Apr17Moderate
May15Moderate
Jun10Good
Jul10Good
Aug8Good
Sep7Good
Oct9Good
Nov8Good
Dec7Good
Location & terrain

Where is Nayoro?

Nayoro sits at 44.4°N, 142.5°E, 97 m above sea level, in Japan. The nearest listed city is Minamishibetsuchō, 23 km away.

Topography around Nayoro

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

Within 3 km, the terrain around Nayoro has only modest variations in elevation — a maximum elevation change of 173 m around an average of 109 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 916 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,225 m.

The land around Nayoro is covered by cropland (39%), artificial surfaces (26%) and trees (25%) within 3 km, trees (71%) and cropland (23%) within 16 km, and trees (68%) and water (21%) within 80 km.

3 km
173 m
16 km
916 m
80 km
2,225 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Minamishibetsuchō 23 km · Asahikawa 65 km · Mombetsu 71 km · Fukagawa 79 km · Rumoi 80 km · Engaru 93 km · Ashibetsu 96 km · Takikawa 99 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 Nayoro (44.3506°, 142.4578°, elevation 97 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).