Ōkawara in Fall
In fall (September, October and November), Ōkawara sees average daytime highs around 18°C and overnight lows near 12°C, with 403 mm of precipitation over about 34 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 25°C in early September to 10°C by late November. The sky is clear or mostly clear about 27% of the time across fall, and the air most often feels dry.
Fall is Ōkawara's 2nd-best season to visit on our travel score. For the whole year in context, see Ōkawara's year-round climate.
- Avg daytime high
- 18°C
- 2nd-warmest season
- Avg overnight low
- 12°C
- Precipitation
- 403 mm
- 34 wet days
- Avg wind
- 10 km/h
- Travel score
- 5.0
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Ōkawara in Fall
Over the season highs ease from about 25°C in early September to 10°C by late November.
A typical fall day in Ōkawara reaches about 18°C and drops to 12°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Ōkawara
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
fall sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Ōkawara weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 4° / -1° | 59 | 9.2 | 6.7 | 9.7 | 0.0 |
| Feb | 5° / -1° | 48 | 8.1 | 5.5 | 10.5 | 0.1 |
| Mar | 8° / 1° | 89 | 10.6 | 3.9 | 11.7 | 1.5 |
| Apr | 14° / 6° | 100 | 10.6 | 0.8 | 13 | 3.8 |
| May | 18° / 11° | 110 | 11.7 | 0 | 14 | 5.6 |
| Jun | 21° / 16° | 138 | 13.9 | 0 | 14.6 | 5.6 |
| Jul | 25° / 20° | 196 | 18.1 | 0 | 14.4 | 5.3 |
| Aug | 26° / 21° | 174 | 16.4 | 0 | 13.5 | 5.5 |
| Sep | 23° / 18° | 181 | 14.3 | 0 | 12.3 | 5.8 |
| Oct | 18° / 12° | 157 | 11 | 0 | 11 | 5.7 |
| Nov | 13° / 6° | 66 | 8.4 | 0.4 | 9.9 | 3.6 |
| Dec | 7° / 1° | 52 | 9.5 | 4 | 9.4 | 0.9 |
Cloud cover in Fall
The sky is clear or mostly clear about 27% of the time across fall.
Chance of precipitation in Fall
Ōkawara gets around 403 mm of rain and snow over 34 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 10 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 54 min in early September to 9 h 36 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.0 kWh/m².
Hazard calendar for Ōkawara
In fall, Ōkawara overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Ōkawara sits in the Pacific typhoon belt; the season peaks July–October.
Ōkawara's rainy season runs March–October, when most of the year's rain falls.
Is fall a good time to visit Ōkawara?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Ōkawara for sightseeing.
What to pack for Ōkawara in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Ōkawara sees daytime highs around 18°C and nights near 12°C. Pack rain gear. Worth having: light clothes and a warm layer. About 34 days see rain.
Sea temperature near Ōkawara in Fall
The nearest coast averages about 20°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 35 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 11 | 9 | 9 | 10 | 14 | 18 | 21 | 24 | 23 | 19 | 17 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 11 | Bracing |
| Feb | 9 | Bracing |
| Mar | 9 | Bracing |
| Apr | 10 | Bracing |
| May | 14 | Bracing |
| Jun | 18 | Cool |
| Jul | 21 | Refreshing |
| Aug | 24 | Refreshing |
| Sep | 23 | Refreshing |
| Oct | 19 | Cool |
| Nov | 17 | Cool |
| Dec | 14 | Bracing |
UV index in Ōkawara in Fall
Clear-sky midday UV across fall averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ōkawara 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 4 | 6 | 8 | 8 | 9 | 9 | 8 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 9 | Very high |
| Sep | 8 | Very high |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Ōkawara in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Ōkawara 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 14 | 20 | 21 | 20 | 14 | 12 | 10 | 10 | 11 | 11 | 9 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 14 | Moderate |
| Mar | 20 | Moderate |
| Apr | 21 | Moderate |
| May | 20 | Moderate |
| Jun | 14 | Moderate |
| Jul | 12 | Good |
| Aug | 10 | Good |
| Sep | 10 | Good |
| Oct | 11 | Good |
| Nov | 11 | Good |
| Dec | 9 | Good |
Where is Ōkawara?
Ōkawara sits at 38.0°N, 140.7°E, 20 m above sea level, in Japan. The nearest listed city is Murata, 8.0 km away.
Topography around Ōkawara
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ōkawara.
Within 3 km, the terrain around Ōkawara has only modest variations in elevation — a maximum elevation change of 196 m around an average of 34 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 818 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,031 m.
The land around Ōkawara is covered by trees (45%), artificial surfaces (28%) and cropland (20%) within 3 km, trees (63%) and cropland (22%) within 16 km, and trees (61%) and water (22%) within 80 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
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 Ōkawara (38.05°, 140.7336°, elevation 20 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.