Azumino weather in May

In May, Azumino sees average daytime highs of 19°C and overnight lows near 9°C, with 156 mm of precipitation across 14.2 wet days and about 13.9 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 21°C by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of May to 14 h 18 min by month's end. Set against the rest of the year, May is Azumino's 8th-clearest and 7th-windiest month. For the whole year in context, see Azumino's year-round climate.

Daytime high
19°
5th warmest
Overnight low
8th coldest
Precipitation
156 mm
14.2 wet days
Daylight
13 h 54 min
4:47 AM – 6:42 PM
Cloud cover
65%
8th clearest
Wind
6 km/h
7th windiest
Solar energy
5.76 kWh/m²
Travel score
5.4
out of 10

Azumino is city in Nagano Prefecture, Japan.

Density
284/km²
people per km²
Founded
2005

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 17°C in the first days to 21°C by the end.

A typical May day in Azumino reaches about 19°C in the afternoon and slips back to 9°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 23°C. Set against its neighbours, May runs about 6°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1176
2176
3176
4177
5187
6187
7187
8187
9188
10188
11188
12198
13198
14198
15199
16199
17199
18199
19199
20209
212010
222010
232010
242010
252010
262010
272011
282011
292111
302111
312111

How May really feels in Azumino

Once humidity and wind are folded in, May 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

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

Azumino weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 5th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 60%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34753
44555
54555
64456
74456
84357
94357
104258
114258
124159
134159
144159
154159
164060
174060
184060
193961
203961
213961
223862
233664
243664
253763
263664
273664
283565
293466
303466
313367

Chance of precipitation in May

Any precipitation

Azumino gets around 156 mm of rain and snow over 14.2 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 45% and peaks near 49% on the wettest days, and about 0 day brings snow.

0%20%40%60%151015202531
Rain chance (%)
142
242
342
442
542
643
743
844
944
1045
1145
1246
1346
1446
1546
1646
1746
1846
1946
2046
2147
2247
2347
2447
2547
2647
2747
2847
2948
3048
3149

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19910
29910
39820
49820
59820
69820
79820
89820
99820
109730
119730
129730
139730
149730
159730
169640
179640
189640
199640
209640
219640
229640
239550
249550
259451
269451
279361
289361
299271
309181
319091

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 min at the start of May to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over May. Sunrise moves from 5:02 AM to 4:38 AM, and sunset from 6:29 PM to 6:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:026:29
213.55:016:30
313.55:006:31
413.64:596:32
513.64:576:33
613.64:566:34
713.74:556:35
813.74:546:36
913.74:536:36
1013.74:526:37
1113.84:516:38
1213.84:506:39
1313.84:506:40
1413.94:496:41
1513.94:486:42
1613.94:476:42
1713.94:466:43
1814.04:456:44
1914.04:456:45
2014.04:446:46
2114.14:436:46
2214.14:436:47
2314.14:426:48
2414.14:416:49
2514.14:416:50
2614.24:406:50
2714.24:406:51
2814.24:396:52
2914.24:396:52
3014.24:386:53
3114.34:386:54

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.76 kWh/m² — the sunniest month for solar.

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 — May's 5.76 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Is May a good time to visit Azumino?

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

5.4
Sightseeing
3rd-best month of the year
2.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Azumino for sightseeing.

What to pack for Azumino in May

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

In May, Azumino sees daytime highs around 19°C and nights near 9°C. Pack rain gear. Worth having: sun protection. About 14 days see rain.

rain gearsun protection

UV index in Azumino in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks 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 Azumino 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 Azumino in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Azumino 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 Azumino?

Azumino sits at 36.3°N, 137.9°E, 568 m above sea level, in Japan. The nearest listed city is Toyoshina, 2.0 km away.

Topography around Azumino

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

Within 3 km, the terrain around Azumino has only modest variations in elevation — a maximum elevation change of 101 m around an average of 577 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,358 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,167 m.

The land around Azumino is covered by cropland (59%) and artificial surfaces (35%) within 3 km, trees (61%) within 16 km, and trees (85%) within 80 km.

3 km
101 m
16 km
2,358 m
80 km
3,167 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Toyoshina 2.0 km · Hotaka 6.0 km · Matsumoto 9.0 km · Shiojiri 22 km · Ōmachi 24 km · Okaya 29 km · Shimosuwa 30 km · Chikuma 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
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 Azumino (36.2882°, 137.887°, elevation 568 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).