Suwa weather in July

In July, Suwa sees average daytime highs of 26°C and overnight lows near 18°C, with 198 mm of rain across 17 wet days and about 14.2 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 27°C by the end. The sky is clear or mostly clear about 13% of the time in July, and the air most often feels humid.

Daylight stretches from about 14 h 24 min at the start of July to 13 h 54 min by month's end. Set against the rest of the year, July is Suwa's 11th-clearest and 9th-windiest month. For the whole year in context, see Suwa's year-round climate.

Daytime high
26°
2nd warmest
Overnight low
18°
11th coldest
Rainfall
198 mm
17 wet days
Daylight
14 h 12 min
4:46 AM – 7:00 PM
Cloud cover
75%
11th clearest
Wind
5 km/h
9th windiest
Solar energy
4.94 kWh/m²
Travel score
5.5
out of 10

Suwa is city in Nagano Prefecture, Japan.

Density
449/km²
people per km²
Founded
1941

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 27°C by the end.

A typical July day in Suwa reaches about 26°C in the afternoon and slips back to 18°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, July runs about 4°C warmer than June and about 1°C cooler than August.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12416
22416
32416
42417
52417
62417
72517
82517
92517
102517
112517
122517
132517
142517
152618
162618
172618
182618
192618
202618
212618
222618
232718
242718
252718
262718
272718
282718
292718
302719
312719

How July really feels in Suwa

Once humidity and wind are folded in, July averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Suwa weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -8°8511.512.49.80.0
Feb / -7°8610.19.510.60.0
Mar / -3°14213.38.911.70.9
Apr14° / 12712.41.912.93.7
May19° / 13312.10.113.95.7
Jun22° / 14°17815.5014.45.4
Jul26° / 18°19817014.25.5
Aug27° / 18°12313.4013.45.9
Sep23° / 15°15912.8012.26.1
Oct17° / 17012.10.111.15.2
Nov11° / 9710.41.710.12.8
Dec / -4°84129.49.60.2

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 14% of July, with mostly cloudy or overcast conditions the remaining 73%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11882
21981
31981
41981
52179
62278
72278
82278
92377
102377
112476
122476
132476
142575
152575
162674
172773
182773
192872
202872
212872
223070
233169
243169
253367
263367
273466
283565
293763
303763
313763

Chance of precipitation in July

Any precipitation

Suwa gets around 198 mm of rain over 17 wet days in July, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 54% and peaks near 61% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
161
261
361
460
560
660
760
860
960
1060
1159
1259
1358
1457
1556
1655
1754
1853
1953
2052
2151
2250
2349
2448
2548
2647
2746
2846
2945
3045
3145

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the humid band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11439443
21238463
31137494
4936514
5835525
6634555
7533566
8432586
9331597
10330607
11229618
12228628
13226639
141256410
151246510
161226611
171216612
181206712
191196713
200186814
210176815
220166816
230156718
240146719
250136720
260126622
270116623
280116524
290106525
30096526
31086527

Wind in July

Winds average 5 km/h in July.

Across July, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 24 min at the start of July to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over July. Sunrise moves from 4:38 AM to 4:57 AM, and sunset from 7:04 PM to 6:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:387:04
214.44:397:03
314.44:397:03
414.44:407:03
514.44:407:03
614.44:417:03
714.44:417:03
814.44:427:03
914.34:427:02
1014.34:437:02
1114.34:437:02
1214.34:447:02
1314.34:447:01
1414.34:457:01
1514.24:467:00
1614.24:467:00
1714.24:476:59
1814.24:486:59
1914.24:486:58
2014.14:496:58
2114.14:506:57
2214.14:516:57
2314.14:516:56
2414.14:526:55
2514.04:536:55
2614.04:546:54
2714.04:546:53
2814.04:556:52
2913.94:566:52
3013.94:576:51
3113.94:576:50

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.94 kWh/m².

For context, solar energy here swings from a low near 2.54 kWh/m² to a high of 5.73 kWh/m² in May across the year — July's 4.94 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.9Bright
154.9Bright
164.9Bright
175.0Bright
185.0Bright
195.0Bright
205.1Bright
215.1Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in July

Hazard calendar for Suwa

In seasonPeak

In July, Suwa sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Suwa sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Suwa?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.5
Sightseeing
4th-best month of the year
5.2
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Suwa for sightseeing.

What to pack for Suwa in July

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

In July, Suwa sees daytime highs around 26°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 17 days see rain.

rain gearlight clothessun protection

UV index in Suwa in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Suwa peaks around July 14 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 14UV 11Dec 21UV 2
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul11Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Suwa in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Suwa is worst in April — around 18 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1918 µg/m³Dec 178 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar17Moderate
Apr18Moderate
May17Moderate
Jun16Moderate
Jul13Moderate
Aug12Good
Sep10Good
Oct10Good
Nov9Good
Dec8Good
Location & terrain

Where is Suwa?

Suwa sits at 36.0°N, 138.1°E, 762 m above sea level, in Japan. The nearest listed city is Shimosuwa, 5.0 km away.

Topography around Suwa

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

Within 3 km, the terrain around Suwa has significant variations in elevation — a maximum elevation change of 507 m around an average of 828 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,248 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,057 m.

The land around Suwa is covered by artificial surfaces (34%), trees (27%) and water (22%) within 3 km, trees (76%) within 16 km, and trees (87%) within 80 km.

3 km
507 m
16 km
1,248 m
80 km
3,057 m
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Shimosuwa 5.0 km · Chino 6.0 km · Okaya 6.0 km · Tatsuno 12 km · Shiojiri 15 km · Kinoshita 19 km · Minamiminowa 22 km · Matsumoto 25 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
Shintoism 49%Buddhism 46%other 4%Christianity 1%

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 Suwa (36.038°, 138.1131°, elevation 762 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).