Namioka weather in May

In May, Namioka sees average daytime highs of 18°C and overnight lows near 9°C, with 98 mm of precipitation across 12.5 wet days and about 14.2 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 20°C by the end. The sky is clear or mostly clear about 29% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 42 min at the start of May to 14 h 42 min by month's end. Set against the rest of the year, May is Namioka's 3rd-clearest and 7th-windiest month. For the whole year in context, see Namioka's year-round climate.

Daytime high
18°
5th warmest
Overnight low
8th coldest
Precipitation
98 mm
12.5 wet days
Daylight
14 h 18 min
4:26 AM – 6:42 PM
Cloud cover
63%
3rd clearest
Wind
10 km/h
7th windiest
Solar energy
5.49 kWh/m²
Travel score
5.4
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 20°C by the end.

A typical May day in Namioka reaches about 18°C in the afternoon and slips back to 9°C overnight — a 9°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 4°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1167
2167
3167
4168
5178
6178
7178
8178
9178
10179
11179
12179
13189
14189
15189
16189
171810
181810
191810
201910
211910
221910
231911
241911
251911
261911
272011
282011
292012
302012
312012

How May really feels in Namioka

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.

Namioka 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 / -5°7415.920.49.40.0
Feb / -4°7114.717.110.40.0
Mar / -2°8915.411.811.70.3
Apr12° / 8713.32.313.13.1
May18° / 9812.5014.25.4
Jun22° / 14°9811.8014.96.1
Jul25° / 19°14914.8014.65.9
Aug27° / 20°16915.2013.65.7
Sep23° / 16°14813.3012.36.0
Oct17° / 11913.50.110.94.8
Nov / 10215.54.89.71.8
Dec / -2°9717.316.89.10.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24555
34654
44555
54555
64456
74357
84258
94258
104159
114159
124159
134159
144159
154060
164060
174060
184060
194159
204060
214060
224060
234060
244159
254159
264159
274159
284159
294258
304159
314060

Chance of precipitation in May

Any precipitationSnow

Namioka gets around 98 mm of rain and snow over 12.5 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 40% and peaks near 43% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1432
2431
3421
4421
5421
6421
7430
8430
9430
10430
11430
12430
13430
14420
15420
16420
17410
18410
19400
20400
21390
22390
23380
24380
25370
26370
27370
28360
29360
30360
31360

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 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
110000
29910
39910
49910
59910
69910
79910
89820
99820
109820
119820
129730
139730
149730
159640
169640
179550
189550
199460
209370
219370
229280
239190
2490100
2587121
2686131
2785141
2883161
2981181
3079201
3176222

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 42 min at the start of May to 14 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 4:43 AM to 4:15 AM, and sunset from 6:26 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.74:436:26
213.84:426:27
313.84:416:28
413.84:406:29
513.94:386:30
613.94:376:32
713.94:366:33
814.04:356:34
914.04:336:35
1014.14:326:36
1114.14:316:37
1214.14:306:38
1314.24:296:39
1414.24:286:40
1514.24:276:41
1614.34:266:42
1714.34:256:43
1814.34:246:44
1914.44:236:45
2014.44:226:46
2114.44:226:47
2214.44:216:47
2314.54:206:48
2414.54:196:49
2514.54:196:50
2614.64:186:51
2714.64:176:52
2814.64:176:53
2914.64:166:54
3014.64:156:54
3114.74:156:55

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.49 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.71 kWh/m² to a high of 5.49 kWh/m² in May across the year — May's 5.49 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.6Bright
245.6Bright
255.6Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in May

Hazard calendar for Namioka

In seasonPeak

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

Namioka sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Namioka?

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

5.4
Sightseeing
5th-best month of the year
1.9
Beach & pool
5th-best month of the year

May is a reasonable time to visit Namioka for sightseeing.

What to pack for Namioka in May

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

In May, Namioka sees daytime highs around 18°C and nights near 9°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

Sea temperature near Namioka in May

The nearest coast averages about 11°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 30 km away) is warmest in August at about 23°C and coldest in March near 8°C.

It's comfortable for a long swim from Jul 24 to Oct 7 — about 2.5 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb8Bracing
Mar8Bracing
Apr8Bracing
May11Bracing
Jun15Cool
Jul19Cool
Aug23Refreshing
Sep22Refreshing
Oct19Cool
Nov15Cool
Dec12Bracing

UV index in Namioka in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Namioka peaks around August 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 19UV 8Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar3Moderate
Apr6High
May8Very high
Jun8Very high
Jul5Moderate
Aug9Very high
Sep7High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Namioka 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 Namioka is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1620 µg/m³Dec 169 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar18Moderate
Apr20Moderate
May18Moderate
Jun13Moderate
Jul12Good
Aug10Good
Sep10Good
Oct10Good
Nov9Good
Dec8Good
Location & terrain

Where is Namioka?

Namioka sits at 40.7°N, 140.6°E, 28 m above sea level, in Japan. The nearest listed city is Kuroishi, 7.0 km away.

Topography around Namioka

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

Within 3 km, the terrain around Namioka has only modest variations in elevation — a maximum elevation change of 154 m around an average of 36 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 749 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,585 m.

The land around Namioka is covered by cropland (45%) and trees (28%) within 3 km, trees (56%) and cropland (28%) within 16 km, and trees (54%) and water (37%) within 80 km.

3 km
154 m
16 km
749 m
80 km
1,585 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Kuroishi 7.0 km · Hirakawa 14 km · Goshogawara 16 km · Hirosaki 16 km · Aomori 17 km · Tsugaru 19 km · Shimokizukuri 22 km · Ōdate 49 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 Namioka (40.7107°, 140.5905°, elevation 28 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).