Ninomiya in Summer
In summer (June, July and August), Ninomiya sees average daytime highs around 25°C and overnight lows near 22°C, with 585 mm of rain over about 44 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Over the season highs climb from about 21°C in early June to 26°C by late August. The sky is clear or mostly clear about 20% of the time across summer, and the air most often feels oppressive.
Summer is Ninomiya's best season of the year to visit on our travel score. For the whole year in context, see Ninomiya's year-round climate.
- Avg daytime high
- 25°C
- warmest season of the year
- Avg overnight low
- 22°C
- Rainfall
- 585 mm
- 44 wet days
- Avg wind
- 12 km/h
- Travel score
- 5.7
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Ninomiya in Summer
Over the season highs climb from about 21°C in early June to 26°C by late August.
A typical summer day in Ninomiya reaches about 25°C and drops to 22°C overnight. The warmest of the three months is August, the coolest June.
Ninomiya 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 | 9° / 4° | 98 | 10 | 2.3 | 9.9 | 1.7 |
| Feb | 9° / 4° | 107 | 11.3 | 2.7 | 10.7 | 1.7 |
| Mar | 12° / 7° | 186 | 16.3 | 1.6 | 11.7 | 2.6 |
| Apr | 15° / 11° | 176 | 14.4 | 0.3 | 12.9 | 4.2 |
| May | 19° / 15° | 181 | 13.6 | 0 | 13.8 | 5.5 |
| Jun | 22° / 19° | 231 | 15.9 | 0 | 14.3 | 5.3 |
| Jul | 25° / 22° | 200 | 14.7 | 0 | 14.1 | 5.8 |
| Aug | 27° / 24° | 154 | 13.5 | 0 | 13.3 | 6.0 |
| Sep | 24° / 21° | 241 | 15.5 | 0 | 12.2 | 5.8 |
| Oct | 20° / 17° | 267 | 15.5 | 0 | 11.1 | 5.5 |
| Nov | 16° / 12° | 141 | 13.1 | 0 | 10.1 | 4.5 |
| Dec | 11° / 7° | 94 | 10.9 | 0.3 | 9.7 | 2.8 |
Cloud cover in Summer
The sky is clear or mostly clear about 20% of the time across summer.
Chance of precipitation in Summer
Ninomiya gets around 585 mm of rain over 44 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 12 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 12 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 4.8 kWh/m².
Hazard calendar for Ninomiya
In summer, Ninomiya overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Ninomiya sits in the Pacific typhoon belt; the season peaks July–October.
Is summer a good time to visit Ninomiya?
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 Ninomiya for sightseeing.
What to pack for Ninomiya in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Ninomiya sees daytime highs around 25°C and nights near 22°C. Pack rain gear. Worth having: light clothes and sun protection. About 44 days see rain.
Sea temperature near Ninomiya in Summer
The nearest coast averages about 24°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 22 km away) is warmest in August at about 26°C and coldest in February near 15°C.
It's comfortable for a long swim from May 31 to Nov 26 — about 5.9 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 15 | 16 | 17 | 19 | 21 | 24 | 26 | 25 | 23 | 21 | 18 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 15 | Cool |
| Mar | 16 | Cool |
| Apr | 17 | Cool |
| May | 19 | Cool |
| Jun | 21 | Refreshing |
| Jul | 24 | Refreshing |
| Aug | 26 | Warm |
| Sep | 25 | Warm |
| Oct | 23 | Refreshing |
| Nov | 21 | Refreshing |
| Dec | 18 | Cool |
UV index in Ninomiya in Summer
Clear-sky midday UV across summer averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ninomiya peaks around July 20 at about 10 (extreme) — 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) | 3 | 4 | 5 | 7 | 9 | 9 | 10 | 10 | 9 | 6 | 4 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Extreme | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 9 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Extreme |
| Aug | 10 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 2 | Moderate |
Air quality in Ninomiya 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 Ninomiya is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 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) | 14 | 25 | 23 | 26 | 21 | 18 | 13 | 12 | 12 | 14 | 14 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 14 | Moderate |
| Feb | 25 | Moderate |
| Mar | 23 | Moderate |
| Apr | 26 | Moderate |
| May | 21 | Moderate |
| Jun | 18 | Moderate |
| Jul | 13 | Moderate |
| Aug | 12 | Moderate |
| Sep | 12 | Moderate |
| Oct | 14 | Moderate |
| Nov | 14 | Moderate |
| Dec | 12 | Good |
Where is Ninomiya?
Ninomiya sits at 35.3°N, 139.3°E, 24 m above sea level, in Japan. The nearest listed city is Ōiso, 6.0 km away.
Topography around Ninomiya
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ninomiya.
Within 3 km, the terrain around Ninomiya has only modest variations in elevation — a maximum elevation change of 175 m around an average of 37 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,245 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.
The land around Ninomiya is covered by trees (37%), water (33%) and artificial surfaces (26%) within 3 km, water (42%), trees (29%) and artificial surfaces (22%) within 16 km, and trees (43%) and water (35%) 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 Ninomiya (35.3015°, 139.2558°, elevation 24 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.