Tomioka in Summer
In summer (June, July and August), Tomioka sees average daytime highs around 27°C and overnight lows near 20°C, with 751 mm of rain over about 66 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Over the season highs climb from about 23°C in early June to 27°C by late August. The sky is clear or mostly clear about 14% of the time across summer, and the air most often feels oppressive.
Summer is Tomioka's 3rd-best season to visit on our travel score. For the whole year in context, see Tomioka's year-round climate.
- Avg daytime high
- 27°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 751 mm
- 66 wet days
- Avg wind
- 5 km/h
- Travel score
- 4.4
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Tomioka in Summer
Over the season highs climb from about 23°C in early June to 27°C by late August.
A typical summer day in Tomioka reaches about 27°C and drops to 20°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Tomioka
Once humidity and wind are folded in, summer brings about 7 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Tomioka weather by month
How the three summer months (June, July and August) 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° / -1° | 68 | 8.5 | 3.8 | 9.8 | 1.4 |
| Feb | 9° / -0° | 71 | 9.6 | 4.1 | 10.6 | 1.6 |
| Mar | 12° / 3° | 131 | 14.4 | 3.3 | 11.7 | 3.0 |
| Apr | 17° / 8° | 148 | 14.7 | 0.4 | 12.9 | 4.9 |
| May | 22° / 13° | 178 | 16 | 0 | 13.9 | 5.6 |
| Jun | 24° / 17° | 239 | 20.7 | 0 | 14.4 | 4.9 |
| Jul | 28° / 21° | 288 | 23.2 | 0 | 14.2 | 4.2 |
| Aug | 29° / 22° | 225 | 22.1 | 0 | 13.4 | 4.1 |
| Sep | 25° / 18° | 257 | 19.8 | 0 | 12.2 | 5.1 |
| Oct | 20° / 12° | 225 | 16.9 | 0 | 11.1 | 5.3 |
| Nov | 15° / 7° | 85 | 9.9 | 0.1 | 10.1 | 4.6 |
| Dec | 10° / 2° | 61 | 8.3 | 1.1 | 9.6 | 2.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 14% of the time across summer.
Chance of precipitation in Summer
Tomioka gets around 751 mm of rain over 66 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 18 min in early June to 12 h 48 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.6 kWh/m².
Hazard calendar for Tomioka
In summer, Tomioka overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Tomioka's rainy season runs March–October, when most of the year's rain falls.
Is summer a good time to visit Tomioka?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Tomioka for sightseeing.
What to pack for Tomioka in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Tomioka sees daytime highs around 27°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 66 days see rain.
UV index in Tomioka in Summer
Clear-sky midday UV across summer averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Tomioka peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 | 6 | 7 | 8 | 9 | 10 | 9 | 9 | 6 | 3 | 2 |
| Level | Moderate | Moderate | High | 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 | 6 | High |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Tomioka in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Tomioka is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 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 | 19 | 21 | 20 | 18 | 15 | 14 | 13 | 12 | 11 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 14 | Moderate |
| Mar | 19 | Moderate |
| Apr | 21 | Moderate |
| May | 20 | Moderate |
| Jun | 18 | Moderate |
| Jul | 15 | Moderate |
| Aug | 14 | Moderate |
| Sep | 13 | Moderate |
| Oct | 12 | Moderate |
| Nov | 11 | Good |
| Dec | 10 | Good |
Where is Tomioka?
Tomioka sits at 36.3°N, 138.9°E, 158 m above sea level, in Japan. The nearest listed city is Yoshii, 8.0 km away.
Topography around Tomioka
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tomioka.
Within 3 km, the terrain around Tomioka has only modest variations in elevation — a maximum elevation change of 162 m around an average of 178 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,454 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,854 m.
The land around Tomioka is covered by artificial surfaces (41%) and trees (33%) within 3 km, trees (68%) within 16 km, and trees (73%) 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 Tomioka (36.2541°, 138.8981°, elevation 158 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.