Tōmi weather in June

In June, Tōmi sees average daytime highs of 23°C and overnight lows near 14°C, with 141 mm of rain across 13.7 wet days and about 14.4 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 24°C by the end. The sky is clear or mostly clear about 13% of the time in June, and the air most often feels dry.

Daylight stretches from about 14 h 18 min at the start of June to 14 h 30 min by month's end. Set against the rest of the year, June is Tōmi's 12th-clearest and 10th-windiest month. For the whole year in context, see Tōmi's year-round climate.

Daytime high
23°
4th warmest
Overnight low
14°
9th coldest
Rainfall
141 mm
13.7 wet days
Daylight
14 h 30 min
4:33 AM – 7:01 PM
Cloud cover
76%
12th clearest
Wind
5 km/h
10th windiest
Solar energy
5.15 kWh/m²
Travel score
5.8
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 June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 22°C in the first days to 24°C by the end.

A typical June day in Tōmi reaches about 23°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 27°C. Set against its neighbours, June runs about 3°C warmer than May and about 4°C cooler than July.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12212
22212
32212
42212
52213
62213
72213
82213
92213
102213
112214
122314
132314
142314
152314
162314
172314
182315
192315
202315
212315
222315
232415
242416
252416
262416
272416
282416
292416
302417

How June really feels in Tōmi

Once humidity and wind are folded in, June 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

June 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 June compares with the rest of the year at a glance. June is the 4th-warmest and 3rd-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 June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in June, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of June, with mostly cloudy or overcast conditions the remaining 77%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13367
23367
33169
43169
53070
62971
72971
82872
92773
102674
112674
122476
132476
142377
152377
162179
172179
182179
192179
202080
211981
221981
231981
241981
251981
261981
271981
281981
291981
301981

Chance of precipitation in June

Any precipitation

Tōmi gets around 141 mm of rain over 13.7 wet days in June. 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 climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
135
236
336
437
537
638
739
840
941
1042
1143
1244
1345
1447
1548
1649
1750
1850
1951
2052
2152
2253
2353
2454
2555
2655
2755
2856
2956
3056

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the dry band about 56% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
191900
2901000
3881110
4861310
5851410
6831520
7811720
8781930
9772030
10742240
11722440
12692650
13662860
14633070
15593281
16563491
175435101
185037121
194838131
204539151
214240171
223940192
233641222
243241242
252942272
262642302
272342323
282141353
291841383
301640413

Wind in June

Winds average 5 km/h in June.

Across June, 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.

0246810151015202530
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

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 h 18 min at the start of June to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over June. Sunrise moves from 4:35 AM to 4:36 AM, and sunset from 6:53 PM to 7:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:356:53
214.34:356:53
314.34:356:54
414.34:346:55
514.44:346:55
614.44:346:56
714.44:346:56
814.44:336:57
914.44:336:58
1014.44:336:58
1114.44:336:59
1214.44:336:59
1314.44:336:59
1414.54:337:00
1514.54:337:00
1614.54:337:01
1714.54:337:01
1814.54:337:01
1914.54:337:02
2014.54:337:02
2114.54:337:02
2214.54:347:02
2314.54:347:03
2414.54:347:03
2514.54:347:03
2614.54:357:03
2714.54:357:03
2814.54:357:03
2914.54:367:03
3014.54:367:03

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 5.15 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 — June's 5.15 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.6Bright
55.6Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.1Bright
165.1Bright
175.0Bright
185.0Bright
194.9Bright
204.9Bright
214.9Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
Planning a trip in June

Is June a good time to visit Tōmi?

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

5.8
Sightseeing
4th-best month of the year
4.5
Beach & pool
4th-best month of the year

June is a reasonable time to visit Tōmi for sightseeing.

What to pack for Tōmi in June

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

In June, Tōmi sees daytime highs around 23°C and nights near 14°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

UV index in Tōmi in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June 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 June

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where June 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
June 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).