Niimi weather in October

In October, Niimi sees average daytime highs of 20°C and overnight lows near 11°C, with 109 mm of rain across 8.1 wet days and about 11.1 hours of daylight. It is the 6th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 18°C by the end. The sky is clear or mostly clear about 34% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of October to 10 h 36 min by month's end. Set against the rest of the year, October is Niimi's 1st-clearest and 9th-windiest month. For the whole year in context, see Niimi's year-round climate.

Daytime high
20°
6th warmest
Overnight low
11°
7th coldest
Rainfall
109 mm
8.1 wet days
Daylight
11 h 06 min
6:18 AM – 5:24 PM
Cloud cover
56%
1st clearest
Wind
8 km/h
9th windiest
Solar energy
3.5 kWh/m²
Travel score
6.6
out of 10

Niimi is city in Okayama Prefecture, Japan.

Density
39/km²
people per km²
Founded
2005

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 18°C by the end.

A typical October day in Niimi reaches about 20°C in the afternoon and slips back to 11°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 24°C. Set against its neighbours, October runs about 5°C cooler than September and about 6°C warmer than November.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12314
22314
32314
42214
52214
62213
72213
82213
92213
102113
112112
122112
132112
142112
152011
162011
172011
182011
192011
201910
211910
221910
231910
24199
25189
26189
27189
28189
29189
30188
31178

How October really feels in Niimi

Once humidity and wind are folded in, October 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

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Niimi weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°549.76.59.90.5
Feb / -1°619.76.210.70.9
Mar11° / 10812.43.111.72.7
Apr17° / 11710.80.312.95.3
May22° / 12°13811.1013.86.4
Jun25° / 17°19414.2014.35.8
Jul29° / 21°23616.9014.14.6
Aug30° / 22°14914.4013.34.5
Sep26° / 18°20113.1012.26.1
Oct20° / 11°1098.1011.16.6
Nov14° / 678.10.210.24.4
Dec / 598.83.69.71.6

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in October, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of October, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24555
34555
44654
54753
64852
74852
84951
95050
105149
115149
125347
135347
145446
155446
165545
175644
185644
195644
205644
215644
225644
235644
245644
255644
265644
275644
285743
295743
305743
315743

Chance of precipitation in October

Any precipitation

Niimi gets around 109 mm of rain over 8.1 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 27% and peaks near 34% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
134
234
333
432
531
631
730
829
928
1027
1127
1226
1326
1426
1526
1625
1725
1825
1925
2025
2125
2225
2325
2425
2525
2625
2725
2825
2925
3025
3125

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, October lands in the dry band about 69% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1373419101
239331791
341331691
443331581
546321470
648311470
751301360
854281260
957271150
1060251050
1162241040
126423940
136821830
146920830
157119730
167318720
177517620
187716520
197915510
208114410
218114410
228413300
238413300
248612200
258612200
268711200
278711200
288910100
298910100
30909100
31909100

Wind in October

Winds average 8 km/h in October.

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

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 42 min at the start of October to 10 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over October. Sunrise moves from 6:06 AM to 6:32 AM, and sunset from 5:45 PM to 5:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:065:45
211.66:065:43
311.66:075:42
411.56:085:40
511.56:095:39
611.56:105:38
711.46:105:36
811.46:115:35
911.46:125:33
1011.36:135:32
1111.36:145:31
1211.26:155:29
1311.26:155:28
1411.26:165:27
1511.16:175:26
1611.16:185:24
1711.16:195:23
1811.06:205:22
1911.06:215:21
2011.06:225:19
2110.96:235:18
2210.96:235:17
2310.96:245:16
2410.86:255:15
2510.86:265:14
2610.86:275:13
2710.76:285:12
2810.76:295:10
2910.76:305:09
3010.66:315:08
3110.66:325:07

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.5 kWh/m².

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 5.57 kWh/m² in May across the year — October's 3.5 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.7Moderate
33.7Moderate
43.7Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.6Moderate
93.6Moderate
103.6Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.4Moderate
233.3Moderate
243.3Moderate
253.3Moderate
263.3Moderate
273.2Moderate
283.2Moderate
293.2Moderate
303.1Moderate
313.1Moderate
Planning a trip in October

Hazard calendar for Niimi

In seasonPeak

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

Niimi sits in the Pacific typhoon belt; the season peaks July–October.

Niimi'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 October a good time to visit Niimi?

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

6.6
Sightseeing
1st-best month of the year
3.5
Beach & pool
6th-best month of the year

October is a reasonable time to visit Niimi for sightseeing.

What to pack for Niimi in October

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

In October, Niimi sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear. About 8 days see rain.

rain gear

Sea temperature near Niimi in October

The nearest coast averages about 23°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 68 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 3 to Nov 12 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep27Warm
Oct23Refreshing
Nov20Cool
Dec16Cool

UV index in Niimi in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 Niimi peaks around July 15 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 15UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Niimi in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Niimi is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateApr 1322 µg/m³Oct 1511 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar22Moderate
Apr23Moderate
May20Moderate
Jun18Moderate
Jul14Moderate
Aug13Moderate
Sep12Moderate
Oct11Good
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Niimi?

Niimi sits at 35.0°N, 133.5°E, 193 m above sea level, in Japan. The nearest listed city is Takahashi, 26 km away.

Topography around Niimi

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

Within 3 km, the terrain around Niimi has significant variations in elevation — a maximum elevation change of 489 m around an average of 336 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,045 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,692 m.

The land around Niimi is covered by trees (83%) within 3 km, trees (94%) within 16 km, and trees (73%) within 80 km.

3 km
489 m
16 km
1,045 m
80 km
1,692 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Takahashi 26 km · Maniwa 27 km · Ibara 43 km · Sōja 43 km · Shōbara 44 km · Kannabechō-yahiro 47 km · Tsuyama 49 km · Fuchūchō 50 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 Niimi (34.9833°, 133.4667°, elevation 193 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).