Matsumoto weather in August

In August, Matsumoto sees average daytime highs of 27°C and overnight lows near 18°C, with 155 mm of rain across 15 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 26°C by the end. The sky is clear or mostly clear about 20% of the time in August, and the air most often feels humid.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Matsumoto's 9th-clearest and 12th-windiest month. For the whole year in context, see Matsumoto's year-round climate.

Daytime high
27°
1st warmest
Overnight low
18°
12th coldest
Rainfall
155 mm
15 wet days
Daylight
13 h 24 min
5:11 AM – 6:34 PM
Cloud cover
67%
9th clearest
Wind
5 km/h
12th windiest
Solar energy
5.06 kWh/m²
Travel score
5.6
out of 10

Matsumoto is city in Nagano Prefecture, Japan.

Founded
1889

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 26°C by the end.

A typical August day in Matsumoto reaches about 27°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, August runs about 1°C warmer than July and about 4°C warmer than September.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12719
22819
32819
42819
52819
62819
72819
82819
92819
102719
112719
122719
132719
142719
152719
162719
172719
182719
192718
202718
212718
222718
232718
242618
252618
262618
272618
282618
292618
302617
312617

How August really feels in Matsumoto

Once humidity and wind are folded in, August 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

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

Matsumoto weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -7°10615.316.29.80.0
Feb / -6°9812.512.210.60.0
Mar / -2°1551510.611.70.8
Apr13° / 13813.72.412.93.5
May19° / 15614.20.113.95.4
Jun22° / 14°22418.2014.45.1
Jul26° / 18°24619.3014.25.1
Aug27° / 18°15515013.45.6
Sep23° / 15°19915.8012.25.6
Oct17° / 19415.30.111.14.8
Nov11° / 11513.32.810.12.6
Dec / -4°10715.512.89.60.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23862
33862
43862
53862
63862
73862
83763
93763
103862
113862
123862
133862
143961
153961
163961
173961
183961
194060
203961
213961
223961
233961
243961
253862
263862
273763
283763
293763
303763
313763

Chance of precipitation in August

Any precipitation

Matsumoto gets around 155 mm of rain over 15 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 49% and peaks near 54% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
149
249
349
448
548
648
747
847
947
1047
1147
1247
1347
1447
1548
1648
1748
1848
1949
2049
2149
2250
2350
2450
2551
2651
2752
2852
2953
3053
3154

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 34% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1045838
2045739
3035839
4035740
5035641
6035641
7035641
8035542
9035542
10045442
11145342
12145342
13155242
14155341
15165340
16275140
17285238
18285337
19295435
203105334
213115432
223135430
233145627
243155725
254165723
264175722
274185820
284205818
295215717
305225716
316235615

Wind in August

Winds average 5 km/h in August, the calmest month.

Across August, 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 August

DaylightNight

Daylight runs from about 13 h 54 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over August. Sunrise moves from 4:58 AM to 5:23 AM, and sunset from 6:50 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.94:586:50
213.84:596:49
313.85:006:48
413.85:016:47
513.75:026:46
613.75:026:45
713.75:036:44
813.75:046:43
913.65:056:42
1013.65:066:41
1113.65:066:40
1213.55:076:39
1313.55:086:38
1413.55:096:36
1513.45:106:35
1613.45:116:34
1713.45:116:33
1813.35:126:31
1913.35:136:30
2013.25:146:29
2113.25:156:27
2213.25:156:26
2313.15:166:25
2413.15:176:23
2513.15:186:22
2613.05:196:21
2713.05:206:19
2813.05:206:18
2912.95:216:16
3012.95:226:15
3112.85:236:14

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.06 kWh/m².

For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 5.76 kWh/m² in May across the year — August's 5.06 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.2Bright
115.2Bright
125.2Bright
135.1Bright
145.1Bright
155.1Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
204.9Bright
214.9Bright
224.9Bright
234.8Bright
244.8Bright
254.8Bright
264.7Bright
274.7Bright
284.7Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in August

Is August a good time to visit Matsumoto?

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

5.6
Sightseeing
1st-best month of the year
5.7
Beach & pool
1st-best month of the year

August is a reasonable time to visit Matsumoto for sightseeing.

What to pack for Matsumoto in August

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

In August, Matsumoto sees daytime highs around 27°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 Matsumoto in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Matsumoto peaks around July 20 at about 10 (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 20UV 10Dec 21UV 2
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Very high
Jul10Extreme
Aug10Extreme
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Matsumoto in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Matsumoto 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 Matsumoto?

Matsumoto sits at 36.2°N, 138.0°E, 593 m above sea level, in Japan. The nearest listed city is Azumino, 9.0 km away.

Topography around Matsumoto

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

Within 3 km, the terrain around Matsumoto has only modest variations in elevation — a maximum elevation change of 218 m around an average of 606 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,543 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,163 m.

The land around Matsumoto is covered by artificial surfaces (74%) within 3 km, trees (59%) within 16 km, and trees (87%) within 80 km.

3 km
218 m
16 km
1,543 m
80 km
3,163 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Azumino 9.0 km · Toyoshina 9.0 km · Hotaka 14 km · Shiojiri 15 km · Shimosuwa 21 km · Okaya 21 km · Suwa 25 km · Tatsuno 28 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 Matsumoto (36.2333°, 137.9667°, elevation 593 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).