Ichihara weather in May

In May, Ichihara sees average daytime highs of 20°C and overnight lows near 16°C, with 149 mm of rain across 12.1 wet days and about 13.8 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 22°C by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 12 min by month's end. Set against the rest of the year, May is Ichihara's 10th-clearest and 3rd-windiest month. For the whole year in context, see Ichihara's year-round climate.

Daytime high
20°
6th warmest
Overnight low
16°
7th coldest
Rainfall
149 mm
12.1 wet days
Daylight
13 h 54 min
4:40 AM – 6:32 PM
Cloud cover
67%
10th clearest
Wind
15 km/h
3rd windiest
Solar energy
5.2 kWh/m²
Travel score
5.9
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 22°C by the end.

A typical May day in Ichihara reaches about 20°C in the afternoon and slips back to 16°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 23°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)
11914
21914
31914
41914
51914
61914
71914
81915
92015
102015
112015
122015
132015
142015
152015
162016
172016
182116
192116
202116
212116
222116
232116
242117
252117
262117
272217
282217
292217
302217
312217

How May really feels in Ichihara

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.

Ichihara 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 / 877.90.79.91.8
Feb / 828.71.110.71.9
Mar12° / 149130.511.73.0
Apr16° / 11°13812.9012.94.8
May20° / 16°14912.1013.85.9
Jun23° / 19°18914.3014.45.8
Jul27° / 23°15512.9014.25.8
Aug28° / 24°11811.5013.35.6
Sep25° / 22°20714.8012.25.8
Oct21° / 16°25114.4011.15.8
Nov16° / 11°12611.8010.14.8
Dec11° / 808.80.19.63.0

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 12% of May, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24357
34357
44258
54159
64060
73961
83862
93763
103664
113763
123565
133565
143565
153565
163664
173664
183664
193565
203664
213763
223763
233664
243664
253664
263664
273664
283664
293664
303466
313367

Chance of precipitation in May

Any precipitation

Ichihara gets around 149 mm of rain over 12.1 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 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
236
336
436
536
636
736
837
937
1038
1138
1239
1339
1440
1540
1641
1741
1841
1941
2041
2141
2241
2340
2440
2540
2640
2739
2839
2939
3039
3139

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 40% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1583471
2563581
3543691
45237101
55038111
64839121
74640131
84441141
94242151
104042161
113943171
123744181
133544192
143344212
153145222
162945242
172845252
182645273
192445283
202244304
212144314
221943335
231842355
241741366
251640386
261539407
271437427
281336438
291234459
3012334610
3111314711

Wind in May

Winds average 15 km/h in May.

Across May, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 12 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 4:54 AM to 4:31 AM, and sunset from 6:19 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.44:546:19
213.54:536:20
313.54:526:21
413.54:516:22
513.54:506:23
613.64:496:24
713.64:486:24
813.64:476:25
913.74:466:26
1013.74:456:27
1113.74:446:28
1213.84:436:29
1313.84:426:29
1413.84:426:30
1513.84:416:31
1613.94:406:32
1713.94:396:33
1813.94:386:34
1913.94:386:34
2014.04:376:35
2114.04:366:36
2214.04:366:37
2314.04:356:37
2414.14:346:38
2514.14:346:39
2614.14:336:40
2714.14:336:40
2814.14:326:41
2914.24:326:42
3014.24:316:42
3114.24:316:43

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.2 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 5.2 kWh/m² in May across the year — May's 5.2 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
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in May

Hazard calendar for Ichihara

In seasonPeak

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

Ichihara 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 Ichihara?

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

5.9
Sightseeing
1st-best month of the year
3.3
Beach & pool
6th-best month of the year

May is a reasonable time to visit Ichihara for sightseeing.

What to pack for Ichihara in May

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

In May, Ichihara sees daytime highs around 20°C and nights near 16°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Ichihara in May

The nearest coast averages about 18°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 22 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Nov 3 — about 4.9 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Ichihara 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 Ichihara peaks around August 10 at about 10 (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 highModerateAug 10UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Ichihara 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 Ichihara is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (September, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateApr 1322 µg/m³Sep 911 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun16Moderate
Jul12Good
Aug11Good
Sep11Good
Oct14Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Ichihara?

Ichihara sits at 35.5°N, 140.1°E, 1 m above sea level, in Japan. The nearest listed city is Chiba, 10 km away.

Topography around Ichihara

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

Within 3 km, the terrain around Ichihara has only modest variations in elevation — a maximum elevation change of 28 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 192 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,222 m.

The land around Ichihara is covered by artificial surfaces (66%) within 3 km, water (31%), trees (30%) and artificial surfaces (26%) within 16 km, and water (40%), trees (23%) and artificial surfaces (23%) within 80 km.

3 km
28 m
16 km
192 m
80 km
1,222 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Chiba 10 km · Sodegaura 13 km · Makuhari 15 km · Yotsukaidō 17 km · Narashino 19 km · Kisarazu 20 km · Ōami 21 km · Mobara 22 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 Ichihara (35.5167°, 140.0833°, elevation 1 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).