Tōmi weather in July

In July, Tōmi sees average daytime highs of 26°C and overnight lows near 18°C, with 161 mm of rain across 14.5 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 25°C in the first days to 28°C by the end. The sky is clear or mostly clear about 16% of the time in July, and the air most often feels humid.

Daylight stretches from about 14 h 30 min at the start of July to 13 h 54 min by month's end. Set against the rest of the year, July is Tōmi's 11th-clearest and 11th-windiest month. For the whole year in context, see Tōmi's year-round climate.

Daytime high
26°
2nd warmest
Overnight low
18°
11th coldest
Rainfall
161 mm
14.5 wet days
Daylight
14 h 18 min
4:45 AM – 7:00 PM
Cloud cover
74%
11th clearest
Wind
5 km/h
11th windiest
Solar energy
5 kWh/m²
Travel score
5.7
out of 10

Tōmi is city in Nagano Prefecture, Japan.

Density
268/km²
people per km²
Founded
2004

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 25°C in the first days to 28°C by the end.

A typical July day in Tōmi 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 30°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)
12517
22517
32517
42517
52517
62517
72517
82518
92618
102618
112618
122618
132618
142618
152618
162618
172718
182718
192718
202719
212719
222719
232719
242719
252819
262819
272819
282819
292819
302819
312819

How July really feels in Tōmi

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.

Tōmi 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 / -6°629.810.19.80.0
Feb / -5°659.48.210.60.0
Mar / -2°10712.47.311.71.3
Apr14° / 10011.41.812.94.2
May20° / 10811.1013.96.1
Jun23° / 14°14113.7014.45.8
Jul26° / 18°16114.5014.25.7
Aug28° / 19°9811.5013.45.9
Sep24° / 15°13711.7012.26.3
Oct17° / 14310.8011.15.5
Nov12° / 7091.110.13.1
Dec / -2°599.679.60.5

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 13% of July, with mostly cloudy or overcast conditions the remaining 71%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11981
22080
32179
42278
52278
62278
72377
82476
92476
102575
112674
122674
132674
142773
152872
162872
172971
183169
193169
203169
213268
223268
233466
243466
253565
263664
273862
283862
294060
304060
314159

Chance of precipitation in July

Any precipitation

Tōmi gets around 161 mm of rain over 14.5 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 47% and peaks near 56% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
156
255
355
455
555
654
754
854
953
1053
1153
1252
1351
1450
1549
1648
1747
1846
1945
2044
2143
2242
2340
2439
2538
2637
2736
2835
2935
3034
3134

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11439443
21238464
31038494
4837514
5736525
6535555
7433576
8432577
9331597
10230608
11229609
122286010
132276011
142256112
152246113
162236114
172226115
181216315
191206316
201196317
211186318
221176319
231166320
241156222
251156123
261146223
271136224
281126225
291126126
301126027
311116028

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 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
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 30 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 36 minutes over July. Sunrise moves from 4:36 AM to 4:56 AM, and sunset from 7:03 PM to 6:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.54:367:03
214.44:377:03
314.44:377:03
414.44:387:03
514.44:387:03
614.44:397:03
714.44:397:03
814.44:407:03
914.44:407:02
1014.44:417:02
1114.34:417:02
1214.34:427:01
1314.34:437:01
1414.34:437:01
1514.34:447:00
1614.34:457:00
1714.24:456:59
1814.24:466:59
1914.24:476:58
2014.24:476:58
2114.24:486:57
2214.14:496:56
2314.14:506:56
2414.14:506:55
2514.14:516:54
2614.04:526:54
2714.04:536:53
2814.04:536:52
2914.04:546:51
3013.94:556:50
3113.94:566:50

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5 kWh/m².

For context, solar energy here swings from a low near 2.51 kWh/m² to a high of 5.79 kWh/m² in May across the year — July's 5 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
165.0Bright
175.0Bright
185.0Bright
195.1Bright
205.1Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.4Bright
315.4Bright
Planning a trip in July

Is July a good time to visit Tōmi?

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

5.7
Sightseeing
5th-best month of the year
5.7
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Tōmi for sightseeing.

What to pack for Tōmi in July

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

In July, Tōmi sees daytime highs around 26°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

UV index in Tōmi in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks 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 Tōmi peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highModerateJul 18UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May9Very high
Jun10Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Tōmi 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 Tōmi 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 Tōmi?

Tōmi sits at 36.4°N, 138.4°E, 639 m above sea level, in Japan. The nearest listed city is Komoro, 8.0 km away.

Topography around Tōmi

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

Within 3 km, the terrain around Tōmi has significant variations in elevation — a maximum elevation change of 474 m around an average of 661 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,148 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,154 m.

The land around Tōmi is covered by trees (32%), artificial surfaces (28%) and cropland (25%) within 3 km, trees (61%) within 16 km, and trees (83%) within 80 km.

3 km
474 m
16 km
2,148 m
80 km
3,154 m
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Komoro 8.0 km · Ueda 9.0 km · Kamimaruko 9.0 km · Miyota 14 km · Saku 19 km · Sakaki 20 km · Karuizawa 24 km · Chikuma 31 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 Tōmi (36.3558°, 138.3609°, elevation 639 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. 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).