Hitachi-ota in Fall
In fall (September, October and November), Hitachi-ota sees average daytime highs around 20°C and overnight lows near 15°C, with 472 mm of rain over about 37 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Over the season highs ease from about 27°C in early September to 13°C by late November. The sky is clear or mostly clear about 32% of the time across fall, and the air most often feels dry.
Fall is Hitachi-ota's best season of the year to visit on our travel score. For the whole year in context, see Hitachi-ota's year-round climate.
- Avg daytime high
- 20°C
- 2nd-warmest season
- Avg overnight low
- 15°C
- Rainfall
- 472 mm
- 37 wet days
- Avg wind
- 10 km/h
- Travel score
- 5.5
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in Hitachi-ota in Fall
Over the season highs ease from about 27°C in early September to 13°C by late November.
A typical fall day in Hitachi-ota reaches about 20°C and drops to 15°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Hitachi-ota
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.
Hitachi-ota 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 | 8° / 2° | 63 | 7.3 | 1.5 | 9.8 | 1.4 |
| Feb | 8° / 2° | 63 | 7.3 | 2 | 10.6 | 1.5 |
| Mar | 11° / 4° | 115 | 12.5 | 1.2 | 11.7 | 2.7 |
| Apr | 16° / 9° | 121 | 11.9 | 0.2 | 12.9 | 4.5 |
| May | 20° / 14° | 144 | 12.5 | 0 | 13.9 | 5.8 |
| Jun | 23° / 18° | 151 | 14.7 | 0 | 14.4 | 5.6 |
| Jul | 27° / 22° | 178 | 16 | 0 | 14.2 | 5.4 |
| Aug | 28° / 23° | 131 | 14 | 0 | 13.4 | 5.4 |
| Sep | 25° / 20° | 179 | 14.7 | 0 | 12.2 | 5.8 |
| Oct | 20° / 15° | 196 | 12.7 | 0 | 11.1 | 5.9 |
| Nov | 15° / 9° | 98 | 9.5 | 0 | 10.1 | 4.7 |
| Dec | 10° / 4° | 64 | 7.6 | 0.3 | 9.5 | 2.6 |
Cloud cover in Fall
The sky is clear or mostly clear about 32% of the time across fall.
Chance of precipitation in Fall
Hitachi-ota gets around 472 mm of rain over 37 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 48 min in early September to 9 h 42 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 3.1 kWh/m².
Hazard calendar for Hitachi-ota
In fall, Hitachi-ota overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Hitachi-ota sits in the Pacific typhoon belt; the season peaks July–October.
Is fall a good time to visit Hitachi-ota?
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 Hitachi-ota for sightseeing.
What to pack for Hitachi-ota in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Hitachi-ota sees daytime highs around 20°C and nights near 15°C. Pack rain gear. Worth having: light clothes and a warm layer. About 37 days see rain.
Sea temperature near Hitachi-ota in Fall
The nearest coast averages about 21°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 21 km away) is warmest in August at about 24°C and coldest in February near 13°C.
It's comfortable for a long swim from Jun 24 to Oct 28 — about 4.2 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 15 | 13 | 13 | 15 | 17 | 19 | 22 | 24 | 23 | 21 | 19 | 16 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Refreshing | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Bracing |
| Feb | 13 | Bracing |
| Mar | 13 | Bracing |
| Apr | 15 | Bracing |
| May | 17 | Cool |
| Jun | 19 | Cool |
| Jul | 22 | Refreshing |
| Aug | 24 | Warm |
| Sep | 23 | Refreshing |
| Oct | 21 | Refreshing |
| Nov | 19 | Cool |
| Dec | 16 | Cool |
UV index in Hitachi-ota in Fall
Clear-sky midday UV across fall averages 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 Hitachi-ota peaks around July 24 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 4 | 4 | 6 | 8 | 9 | 10 | 10 | 8 | 6 | 3 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Hitachi-ota 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 Hitachi-ota is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.5× 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) | 10 | 13 | 19 | 21 | 20 | 16 | 14 | 13 | 11 | 11 | 10 | 9 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 13 | Moderate |
| Mar | 19 | Moderate |
| Apr | 21 | Moderate |
| May | 20 | Moderate |
| Jun | 16 | Moderate |
| Jul | 14 | Moderate |
| Aug | 13 | Moderate |
| Sep | 11 | Good |
| Oct | 11 | Good |
| Nov | 10 | Good |
| Dec | 9 | Good |
Where is Hitachi-ota?
Hitachi-ota sits at 36.6°N, 140.5°E, 20 m above sea level, in Japan. The nearest listed city is Tokai, 9.0 km away.
Topography around Hitachi-ota
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hitachi-ota.
Within 3 km, the terrain around Hitachi-ota has only modest variations in elevation — a maximum elevation change of 198 m around an average of 48 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 624 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,767 m.
The land around Hitachi-ota is covered by trees (53%) and artificial surfaces (21%) within 3 km, trees (50%) within 16 km, and trees (45%) and water (26%) 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 Hitachi-ota (36.5513°, 140.5282°, 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.