Nasu weather in May

In May, Nasu sees average daytime highs of 20°C and overnight lows near 10°C, with 149 mm of rain across 13.9 wet days and about 14 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 21°C by the end. The sky is clear or mostly clear about 24% 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 Nasu's 8th-clearest and 6th-windiest month. For the whole year in context, see Nasu's year-round climate.

Daytime high
20°
5th warmest
Overnight low
10°
8th coldest
Rainfall
149 mm
13.9 wet days
Daylight
14 hours
4:37 AM – 6:35 PM
Cloud cover
68%
8th clearest
Wind
8 km/h
6th windiest
Solar energy
5.19 kWh/m²
Travel score
5.6
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 21°C by the end.

A typical May day in Nasu reaches about 20°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 24°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1188
2188
3188
4188
5199
6199
7199
8199
9199
10199
111910
121910
131910
142010
152010
162010
172011
182011
192011
202011
212111
222111
232112
242112
252112
262112
272112
282112
292112
302213
312213

How May really feels in Nasu

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.

Nasu weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°619.389.70.0
Feb / -2°568.86.210.60.2
Mar / 11113.35.111.71.8
Apr15° / 13013.11.112.94.1
May20° / 10°14913.90145.6
Jun23° / 15°17616.8014.55.3
Jul26° / 19°24021.1014.34.8
Aug27° / 20°19018.4013.45.0
Sep24° / 17°22716.4012.35.5
Oct18° / 10°185140115.2
Nov13° / 889.40.3103.5
Dec / -0°609.64.19.51.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34258
44258
54159
63961
73961
83961
93862
103862
113862
123763
133763
143763
153763
163763
173763
183763
193763
203763
213664
223565
233565
243565
253565
263565
273466
283466
293169
303169
313169

Chance of precipitation in May

Any precipitation

Nasu gets around 149 mm of rain over 13.9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 46% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
142
242
343
443
544
644
744
845
945
1046
1146
1246
1346
1446
1546
1646
1746
1845
1945
2044
2144
2244
2343
2443
2543
2642
2742
2842
2942
3042
3142

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 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19361
29271
39271
49181
59181
69091
79091
89091
989101
1089101
1189101
1289101
1388111
1488111
1586122
1686122
1785132
1884142
1982153
2081163
2180173
2278184
2377194
2476204
2574224
2672235
2770255
2868275
2965296
3063307
3161327

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 4:52 AM to 4:27 AM, and sunset from 6:22 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.54:526:22
213.54:516:23
313.64:496:24
413.64:486:25
513.64:476:25
613.74:466:26
713.74:456:27
813.74:446:28
913.84:436:29
1013.84:426:30
1113.84:416:31
1213.94:406:32
1313.94:396:33
1413.94:386:33
1513.94:376:34
1614.04:376:35
1714.04:366:36
1814.04:356:37
1914.14:346:38
2014.14:336:39
2114.14:336:39
2214.14:326:40
2314.24:316:41
2414.24:316:42
2514.24:306:43
2614.24:306:43
2714.34:296:44
2814.34:286:45
2914.34:286:46
3014.34:286:46
3114.34:276:47

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.19 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 5.19 kWh/m² in May across the year — May's 5.19 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.2Bright
315.2Bright
Planning a trip in May

Hazard calendar for Nasu

In seasonPeak

In May, Nasu sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Nasu's rainy season runs March–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Nasu?

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

5.6
Sightseeing
1st-best month of the year
2.9
Beach & pool
5th-best month of the year

May is a reasonable time to visit Nasu for sightseeing.

What to pack for Nasu in May

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

In May, Nasu sees daytime highs around 20°C and nights near 10°C. Worth packing: rain gear and sun protection. About 14 days see rain.

rain gearsun protection

UV index in Nasu in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nasu peaks around July 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 20UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Low

Air quality in Nasu 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 Nasu is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1821 µg/m³Dec 189 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug13Moderate
Sep11Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Nasu?

Nasu sits at 37.0°N, 140.1°E, 362 m above sea level, in Japan. The nearest listed city is Nasushiobara, 8.0 km away.

Topography around Nasu

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

Within 3 km, the terrain around Nasu has only modest variations in elevation — a maximum elevation change of 143 m around an average of 386 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,727 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,550 m.

The land around Nasu is covered by trees (64%) and cropland (24%) within 3 km, trees (72%) within 16 km, and trees (77%) within 80 km.

3 km
143 m
16 km
1,727 m
80 km
2,550 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Nasushiobara 8.0 km · Kuroiso 9.0 km · Kumakura 14 km · Shirakawa 17 km · Ōtawara 20 km · Yabuki 26 km · Yaita 30 km · Ogawa 33 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 Nasu (37.0421°, 140.0938°, elevation 362 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).