Chikusei weather in May

In May, Chikusei sees average daytime highs of 23°C and overnight lows near 14°C, with 134 mm of rain across 12.5 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 21°C in the first days to 24°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 Chikusei's 8th-clearest and 3rd-windiest month. For the whole year in context, see Chikusei's year-round climate.

Daytime high
23°
5th warmest
Overnight low
14°
8th coldest
Rainfall
134 mm
12.5 wet days
Daylight
13 h 54 min
4:39 AM – 6:34 PM
Cloud cover
68%
8th clearest
Wind
9 km/h
3rd windiest
Solar energy
5.09 kWh/m²
Travel score
6.3
out of 10

Chikusei is city in Ibaraki Prefecture, Japan.

Density
491/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 21°C in the first days to 24°C by the end.

A typical May day in Chikusei reaches about 23°C in the afternoon and slips back to 14°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 27°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12112
22112
32112
42212
52212
62213
72213
82213
92213
102213
112213
122213
132314
142314
152314
162314
172314
182314
192314
202315
212415
222415
232415
242415
252415
262415
272416
282416
292416
302516
312516

How May really feels in Chikusei

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.

Chikusei 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 / -0°556.11.39.81.9
Feb10° / 546.71.810.62.3
Mar13° / 10011.50.811.73.7
Apr18° / 10711.10.112.95.6
May23° / 14°13412.5013.96.3
Jun26° / 18°14714.6014.45.5
Jul30° / 22°16515.9014.24.4
Aug31° / 23°12313.7013.44.1
Sep27° / 20°16414.2012.25.5
Oct21° / 14°17612.3011.16.2
Nov16° / 808.7010.15.2
Dec11° / 526.50.29.63.1

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 14% of May, with mostly cloudy or overcast conditions the remaining 62%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24555
34456
44456
54357
64159
74159
83961
93862
103862
113961
123763
133763
143763
153763
163763
173664
183664
193763
203763
213763
223763
233763
243664
253664
263565
273565
283466
293367
303367
313169

Chance of precipitation in May

Any precipitation

Chikusei gets around 134 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 39% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
537
637
737
838
938
1039
1139
1240
1340
1440
1540
1641
1741
1841
1941
2041
2142
2242
2342
2441
2541
2641
2740
2840
2940
3040
3140

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 50% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1752041
2732151
3722251
4702361
5682471
6672571
7652681
8632791
9632791
106128101
116029101
125830111
135631121
145532121
155333131
165134141
175034151
184835161
194636172
204437182
214237192
224038202
233838212
243639223
253539233
263340243
273140254
282940274
292741284
302541295
312441306

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

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 4:53 AM to 4:29 AM, and sunset from 6:21 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.54:536:21
213.54:526:22
313.54:516:23
413.64:506:24
513.64:496:25
613.64:486:25
713.74:476:26
813.74:466:27
913.74:456:28
1013.84:446:29
1113.84:436:30
1213.84:426:31
1313.84:416:31
1413.94:406:32
1513.94:396:33
1613.94:396:34
1714.04:386:35
1814.04:376:36
1914.04:366:36
2014.04:366:37
2114.14:356:38
2214.14:346:39
2314.14:346:40
2414.14:336:40
2514.14:326:41
2614.24:326:42
2714.24:316:43
2814.24:316:43
2914.24:306:44
3014.24:306:45
3114.34:296:46

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.09 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 5.09 kWh/m² in May across the year — May's 5.09 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.2Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in May

Hazard calendar for Chikusei

In seasonPeak

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

Chikusei 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 Chikusei?

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

6.3
Sightseeing
1st-best month of the year
4.8
Beach & pool
5th-best month of the year

May is a reasonable time to visit Chikusei for sightseeing.

What to pack for Chikusei in May

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

In May, Chikusei sees daytime highs around 23°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Chikusei 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 58 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 24 to Oct 28 — about 4.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Chikusei 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 Chikusei peaks around July 17 at about 9 (very high) — 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 highModerateJul 17UV 9Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Chikusei 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 Chikusei is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2425 µg/m³Dec 1914 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar25Moderate
Apr25Moderate
May24Moderate
Jun19Moderate
Jul16Moderate
Aug15Moderate
Sep15Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Chikusei?

Chikusei sits at 36.3°N, 140.0°E, 33 m above sea level, in Japan. The nearest listed city is Shimodate, 2.0 km away.

Topography around Chikusei

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

Within 3 km, the terrain around Chikusei has only modest variations in elevation — a maximum elevation change of 34 m around an average of 35 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 847 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,553 m.

The land around Chikusei is covered by cropland (60%) and artificial surfaces (32%) within 3 km, cropland (46%), trees (25%) and artificial surfaces (24%) within 16 km, and trees (44%), artificial surfaces (22%) and cropland (21%) within 80 km.

3 km
34 m
16 km
847 m
80 km
2,553 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Shimodate 2.0 km · Yūki 9.0 km · Iwase 11 km · Makabe 12 km · Mooka 13 km · Sakuragawa 14 km · Kaminokawa 14 km · Shimo-tsuma 15 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 Chikusei (36.316°, 139.9824°, elevation 33 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).