Kōnosu in Summer
In summer (June, July and August), Kōnosu sees average daytime highs around 29°C and overnight lows near 22°C, with 460 mm of rain over about 41 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 25°C in early June to 30°C by late August. The sky is clear or mostly clear about 16% of the time across summer, and the air most often feels oppressive.
Summer is Kōnosu's 3rd-best season to visit on our travel score. For the whole year in context, see Kōnosu's year-round climate.
- Avg daytime high
- 29°C
- warmest season of the year
- Avg overnight low
- 22°C
- Rainfall
- 460 mm
- 41 wet days
- Avg wind
- 7 km/h
- Travel score
- 4.7
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Kōnosu in Summer
Over the season highs climb from about 25°C in early June to 30°C by late August.
A typical summer day in Kōnosu reaches about 29°C and drops to 22°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Kōnosu
Once humidity and wind are folded in, summer brings about 49 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.
Kōnosu 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° / 0° | 57 | 6 | 1.8 | 9.8 | 2.1 |
| Feb | 10° / 1° | 53 | 6.4 | 2 | 10.6 | 2.5 |
| Mar | 14° / 4° | 97 | 11.2 | 1 | 11.7 | 3.8 |
| Apr | 19° / 9° | 106 | 10.7 | 0.2 | 12.9 | 5.8 |
| May | 23° / 15° | 127 | 12.2 | 0 | 13.9 | 6.4 |
| Jun | 26° / 19° | 162 | 14.2 | 0 | 14.4 | 5.6 |
| Jul | 30° / 23° | 170 | 14.7 | 0 | 14.2 | 4.4 |
| Aug | 31° / 24° | 128 | 12.3 | 0 | 13.4 | 4.1 |
| Sep | 27° / 21° | 186 | 14.1 | 0 | 12.2 | 5.5 |
| Oct | 21° / 14° | 196 | 12.4 | 0 | 11.1 | 6.2 |
| Nov | 16° / 8° | 76 | 8.6 | 0 | 10.1 | 5.4 |
| Dec | 11° / 3° | 50 | 6.5 | 0.2 | 9.6 | 3.3 |
Cloud cover in Summer
The sky is clear or mostly clear about 16% of the time across summer.
Chance of precipitation in Summer
Kōnosu gets around 460 mm of rain over 41 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 7 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 4.4 kWh/m².
Is summer a good time to visit Kōnosu?
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 Kōnosu for sightseeing.
What to pack for Kōnosu in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Kōnosu sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 41 days see rain.
Sea temperature near Kōnosu in Summer
The nearest coast averages about 23°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 59 km away) is warmest in August at about 26°C and coldest in February near 13°C.
It's comfortable for a long swim from Jun 7 to Nov 3 — about 4.9 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 14 | 13 | 13 | 15 | 18 | 21 | 23 | 26 | 25 | 22 | 19 | 16 |
| Comfort | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 14 | Bracing |
| Feb | 13 | Bracing |
| Mar | 13 | Bracing |
| Apr | 15 | Cool |
| May | 18 | Cool |
| Jun | 21 | Refreshing |
| Jul | 23 | Refreshing |
| Aug | 26 | Warm |
| Sep | 25 | Warm |
| Oct | 22 | Refreshing |
| Nov | 19 | Cool |
| Dec | 16 | Cool |
UV index in Kōnosu 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 Kōnosu peaks around July 16 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 | 9 | 9 | 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 | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Kōnosu 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 Kōnosu is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 14 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) | 15 | 21 | 25 | 26 | 24 | 20 | 17 | 16 | 16 | 16 | 16 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 21 | Moderate |
| Mar | 25 | Moderate |
| Apr | 26 | Moderate |
| May | 24 | Moderate |
| Jun | 20 | Moderate |
| Jul | 17 | Moderate |
| Aug | 16 | Moderate |
| Sep | 16 | Moderate |
| Oct | 16 | Moderate |
| Nov | 16 | Moderate |
| Dec | 14 | Moderate |
Where is Kōnosu?
Kōnosu sits at 36.1°N, 139.5°E, 19 m above sea level, in Japan. The nearest listed city is Kitamoto, 4.0 km away.
Topography around Kōnosu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kōnosu.
Within 3 km, the terrain around Kōnosu has only modest variations in elevation — a maximum elevation change of 34 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 133 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,580 m.
The land around Kōnosu is covered by artificial surfaces (46%) and cropland (42%) within 3 km, artificial surfaces (43%) and cropland (38%) within 16 km, and trees (48%) and artificial surfaces (28%) 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 Kōnosu (36.0687°, 139.5168°, elevation 19 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.