Hitachi weather in May

In May, Hitachi sees average daytime highs of 18°C and overnight lows near 15°C, with 144 mm of rain across 12.5 wet days and about 13.9 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 19°C by the end. The sky is clear or mostly clear about 25% 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 Hitachi's 10th-clearest and 9th-windiest month. For the whole year in context, see Hitachi's year-round climate.

Daytime high
18°
6th warmest
Overnight low
15°
7th coldest
Rainfall
144 mm
12.5 wet days
Daylight
13 h 54 min
4:35 AM – 6:32 PM
Cloud cover
67%
10th clearest
Wind
14 km/h
9th windiest
Solar energy
5.45 kWh/m²
Travel score
5.3
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 19°C by the end.

A typical May day in Hitachi reaches about 18°C in the afternoon and slips back to 15°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 20°C. Set against its neighbours, May runs about 4°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11612
21613
31613
41613
51713
61713
71713
81713
91714
101714
111714
121714
131714
141714
151814
161814
171815
181815
191815
201815
211815
221815
231815
241816
251916
261916
271916
281916
291916
301916
311917

How May really feels in Hitachi

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.

Hitachi weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 738.21.29.81.5
Feb / 718.31.810.61.4
Mar10° / 12712.70.911.72.3
Apr14° / 10°125120.212.93.9
May18° / 15°14412.5013.95.3
Jun21° / 18°14814.3014.55.4
Jul24° / 22°16214.1014.26.0
Aug26° / 23°11111.4013.46.4
Sep24° / 21°17414.1012.26.0
Oct19° / 17°21113.2011.15.8
Nov15° / 12°10810.10104.7
Dec11° / 728.70.29.52.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% 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 61%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34654
44456
54456
64357
74258
84060
94060
103961
113961
123961
133961
143862
153862
163862
173862
183862
193862
203862
213862
223763
233763
243862
253763
263763
273763
283763
293565
303565
313565

Chance of precipitation in May

Any precipitation

Hitachi gets around 144 mm of rain 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 rain averages around 40% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
338
438
538
638
739
839
939
1040
1140
1241
1341
1441
1542
1642
1742
1842
1942
2042
2142
2241
2341
2440
2540
2640
2739
2839
2938
3038
3138

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 46% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1742420
2722620
3712720
4692920
5663130
6653230
7633430
8613540
9593740
10573850
11553960
12544060
13524170
14504280
15484390
164643100
174444110
184245120
194045141
203845161
213646171
223546191
233346211
243145231
252945251
262745271
272644282
282443302
292343322
302142343
311941363

Wind in May

Winds average 14 km/h in May.

Across May, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3013light breeze
3113light breeze

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 4:50 AM to 4:26 AM, and sunset from 6:19 PM to 6:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.54:506:19
213.54:496:20
313.54:486:21
413.64:476:22
513.64:466:22
613.64:456:23
713.74:446:24
813.74:436:25
913.74:426:26
1013.84:416:27
1113.84:406:28
1213.84:396:29
1313.94:386:29
1413.94:376:30
1513.94:366:31
1613.94:356:32
1714.04:356:33
1814.04:346:34
1914.04:336:34
2014.14:326:35
2114.14:326:36
2214.14:316:37
2314.14:306:38
2414.14:306:38
2514.24:296:39
2614.24:286:40
2714.24:286:41
2814.24:276:41
2914.34:276:42
3014.34:266:43
3114.34:266:44

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.45 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 5.45 kWh/m² in May across the year — May's 5.45 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
235.5Bright
245.5Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.5Bright
315.5Bright
Planning a trip in May

Hazard calendar for Hitachi

In seasonPeak

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

Hitachi 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 Hitachi?

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

5.3
Sightseeing
6th-best month of the year
1.6
Beach & pool
6th-best month of the year

May is a reasonable time to visit Hitachi for sightseeing.

What to pack for Hitachi in May

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

In May, Hitachi sees daytime highs around 18°C and nights near 15°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

Sea temperature near Hitachi in May

The nearest coast averages about 17°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 20 km away) is warmest in August at about 24°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 28 to Oct 25 — about 3.9 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr14Bracing
May17Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Hitachi 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 Hitachi peaks around August 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highVery highModerateAug 12UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug10Extreme
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Hitachi 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 Hitachi is worst in April — around 19 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 2219 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar17Moderate
Apr19Moderate
May19Moderate
Jun14Moderate
Jul12Moderate
Aug11Good
Sep10Good
Oct10Good
Nov9Good
Dec7Good
Location & terrain

Where is Hitachi?

Hitachi sits at 36.6°N, 140.7°E, 51 m above sea level, in Japan. The nearest listed city is Hitachi-ota, 12 km away.

Topography around Hitachi

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

Within 3 km, the terrain around Hitachi has significant variations in elevation — a maximum elevation change of 375 m around an average of 103 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 653 m; within 80 km, large variations in elevation — a maximum elevation change of 1,074 m.

The land around Hitachi is covered by trees (45%) and artificial surfaces (34%) within 3 km, water (43%) and trees (40%) within 16 km, and trees (46%) and water (30%) within 80 km.

3 km
375 m
16 km
653 m
80 km
1,074 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Hitachi-ota 12 km · Takahagi 14 km · Tokai 16 km · Funaishikawa 17 km · Ōmiya 22 km · Inada 22 km · Hitachiomiya 22 km · Kitaibaraki 23 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 Hitachi (36.6°, 140.65°, elevation 51 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).