Nakanojō in Summer

In summer (June, July and August), Nakanojō sees average daytime highs around 24°C and overnight lows near 17°C, with 716 mm of rain over about 70 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 20°C in early June to 25°C by late August. The sky is clear or mostly clear about 10% of the time across summer, and the air most often feels muggy.

Summer is Nakanojō's best season of the year to visit on our travel score. For the whole year in context, see Nakanojō's year-round climate.

Avg daytime high: 24°C; warmest season of the year
Avg overnight low: 17°C
Rainfall: 716 mm; 70 wet days
Avg wind: 5 km/h
Travel score: 4.5; best season of the year
Months: Jun · Jul · Aug

← Spring Nakanojō year-round climate Fall →

Spring Summer Fall Winter

Temperature in Nakanojō in Summer

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 20°C in early June to 25°C by late August.

A typical summer day in Nakanojō reaches about 24°C and drops to 17°C overnight. The warmest of the three months is August, the coolest June.

How summer really feels in Nakanojō

Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Nakanojō 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	2° / -5°	78	14.6	16.4	9.8	0.0
Feb	3° / -5°	74	13.5	14	10.6	0.0
Mar	7° / -2°	115	15.6	11.8	11.7	0.8
Apr	13° / 4°	121	15	3.4	12.9	3.2
May	18° / 10°	160	16.8	0.3	13.9	4.9
Jun	21° / 14°	227	22	0	14.5	4.4
Jul	25° / 18°	273	24.2	0	14.2	4.4
Aug	26° / 19°	216	23.5	0	13.4	4.6
Sep	22° / 15°	215	19.7	0	12.2	4.9
Oct	16° / 9°	178	15.6	0.2	11.1	4.5
Nov	11° / 3°	78	11.6	3.5	10	2.5
Dec	5° / -2°	67	13.5	12.4	9.5	0.2

Cloud cover in Summer

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time across summer.

Chance of precipitation in Summer

Any precipitation

Nakanojō gets around 716 mm of rain over 70 wet days across summer. The line is the day-by-day chance of measurable precipitation.

Humidity in Summer

DryComfortableHumidMuggyOppressiveMiserable

Most of summer feels muggy — 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

DaylightNight

Daylight runs from about 14 h 18 min in early June to 12 h 54 min by late August. The lit band spans sunrise to sunset each day.

Solar energy in Summer

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across summer, about 4.8 kWh/m².

Planning a trip in summer

Hazard calendar for Nakanojō

In seasonPeak

In summer, Nakanojō overlaps its rainy season season. The full year is below, with each hazard's peak months called out.

Nakanojō's rainy season runs May–October, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is summer a good time to visit Nakanojō?

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.

4.5

Sightseeing

1st-best month of the year

3.8

Beach & pool

1st-best month of the year

summer is a reasonable time to visit Nakanojō for sightseeing.

What to pack for Nakanojō in Summer

From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In summer, Nakanojō sees daytime highs around 24°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 70 days see rain.

rain gearlight clothessun protection

UV index in Nakanojō in Summer

LowModerateHighVery highExtreme

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 Nakanojō 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 Nakanojō in Summer

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.

Air quality in Nakanojō is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.1× 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	13	12	12	11	10
Level	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	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	13	Moderate
Sep	12	Good
Oct	12	Good
Nov	11	Good
Dec	10	Good

Location & terrain

Where is Nakanojō?

Nakanojō sits at 36.6°N, 138.8°E, 371 m above sea level, in Japan. The nearest listed city is Minakami, 17 km away.

Topography around Nakanojō

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nakanojō.

Within 3 km, the terrain around Nakanojō has significant variations in elevation — a maximum elevation change of 454 m around an average of 421 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,443 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,852 m.

The land around Nakanojō is covered by trees (61%) within 3 km, trees (89%) within 16 km, and trees (81%) within 80 km.

3 km

454 m

trees 61%

16 km

1,443 m

trees 89%

80 km

2,852 m

trees 81%

treesgrasslandcroplandartificial surfaceswater

← Spring Nakanojō year-round climate Fall →

Summer weather nearby: Minakami 17 km · Shibukawa 18 km · Numata 19 km · Ogura 20 km · Kanekomachi 24 km · Annaka 29 km · Maebashi 30 km · Karuizawa 32 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 Nakanojō (36.5872°, 138.8408°, elevation 371 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.