Futtsu in Summer
In summer (June, July and August), Futtsu sees average daytime highs around 25°C and overnight lows near 23°C, with 436 mm of rain over about 34 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 27°C by late August. The sky is clear or mostly clear about 24% of the time across summer, and the air most often feels oppressive.
Summer is Futtsu's best season of the year to visit on our travel score. For the whole year in context, see Futtsu's year-round climate.
- Avg daytime high
- 25°C
- warmest season of the year
- Avg overnight low
- 23°C
- Rainfall
- 436 mm
- 34 wet days
- Avg wind
- 17 km/h
- Travel score
- 6.2
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Futtsu in Summer
Over the season highs climb from about 21°C in early June to 27°C by late August.
A typical summer day in Futtsu reaches about 25°C and drops to 23°C overnight. The warmest of the three months is August, the coolest June.
Futtsu 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 | 10° / 6° | 82 | 7.4 | 0.4 | 9.9 | 2.5 |
| Feb | 10° / 6° | 83 | 8.5 | 0.7 | 10.7 | 2.4 |
| Mar | 13° / 8° | 144 | 13 | 0.2 | 11.7 | 3.3 |
| Apr | 16° / 13° | 126 | 11.6 | 0 | 12.9 | 4.8 |
| May | 19° / 17° | 138 | 10.9 | 0 | 13.8 | 6.0 |
| Jun | 22° / 20° | 182 | 12.9 | 0 | 14.3 | 5.8 |
| Jul | 25° / 23° | 147 | 11.5 | 0 | 14.1 | 6.4 |
| Aug | 27° / 25° | 107 | 9.8 | 0 | 13.3 | 6.5 |
| Sep | 25° / 22° | 185 | 13.2 | 0 | 12.2 | 6.2 |
| Oct | 21° / 18° | 222 | 12.7 | 0 | 11.1 | 6.1 |
| Nov | 17° / 13° | 115 | 10.7 | 0 | 10.1 | 5.3 |
| Dec | 13° / 9° | 73 | 8.5 | 0 | 9.7 | 3.7 |
Cloud cover in Summer
The sky is clear or mostly clear about 24% of the time across summer.
Chance of precipitation in Summer
Futtsu gets around 436 mm of rain over 34 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 17 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 5.0 kWh/m².
Hazard calendar for Futtsu
In summer, Futtsu overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Futtsu sits in the Pacific typhoon belt; the season peaks July–October.
Is summer a good time to visit Futtsu?
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 Futtsu for sightseeing.
What to pack for Futtsu in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Futtsu sees daytime highs around 25°C and nights near 23°C. Worth packing: light clothes, rain gear and sun protection. About 34 days see rain.
Sea temperature near Futtsu 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 offshore is warmest in August at about 26°C and coldest in February near 13°C.
It's comfortable for a long swim from Jun 5 to Nov 9 — about 5.2 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 | 14 | 16 | 18 | 21 | 24 | 26 | 25 | 22 | 20 | 17 |
| Comfort | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Bracing |
| Feb | 13 | Bracing |
| Mar | 14 | Bracing |
| Apr | 16 | Cool |
| May | 18 | Cool |
| Jun | 21 | Refreshing |
| Jul | 24 | Refreshing |
| Aug | 26 | Warm |
| Sep | 25 | Warm |
| Oct | 22 | Refreshing |
| Nov | 20 | Cool |
| Dec | 17 | Cool |
UV index in Futtsu 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 Futtsu peaks around August 10 at about 10 (extreme) — 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 | 5 | 7 | 8 | 9 | 10 | 10 | 8 | 6 | 4 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 2 | Moderate |
Air quality in Futtsu 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 Futtsu 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 Futtsu?
Futtsu sits at 35.3°N, 139.8°E, 5 m above sea level, in Japan. The nearest listed city is Kimitsu, 6.0 km away.
Topography around Futtsu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Futtsu.
Within 3 km, the terrain around Futtsu has only modest variations in elevation — a maximum elevation change of 17 m around an average of 2 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 378 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,656 m.
The land around Futtsu is covered by water (62%) within 3 km, water (58%) and trees (23%) within 16 km, and water (46%), trees (26%) and artificial surfaces (20%) 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 Futtsu (35.3108°, 139.8188°, elevation 5 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.