Hayama weather in May

In May, Hayama sees average daytime highs of 19°C and overnight lows near 16°C, with 159 mm of rain across 11.9 wet days and about 13.8 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 20°C by the end. The sky is clear or mostly clear about 26% 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 Hayama's 10th-clearest and 9th-windiest month. For the whole year in context, see Hayama's year-round climate.

Daytime high
19°
6th warmest
Overnight low
16°
7th coldest
Rainfall
159 mm
11.9 wet days
Daylight
13 h 48 min
4:42 AM – 6:33 PM
Cloud cover
67%
10th clearest
Wind
17 km/h
9th windiest
Solar energy
5.18 kWh/m²
Travel score
5.7
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 20°C by the end.

A typical May day in Hayama reaches about 19°C in the afternoon and slips back to 16°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 21°C. Set against its neighbours, May runs about 3°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11815
21815
31815
41815
51815
61815
71815
81816
91816
101816
111916
121916
131916
141916
151916
161916
171917
181917
191917
201917
211917
222017
232017
242017
252018
262018
272018
282018
292018
302018
312018

Hayama weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 8990.59.92.4
Feb10° / 949.50.910.72.3
Mar12° / 16414.70.211.73.1
Apr16° / 12°15113.4012.94.5
May19° / 16°15911.9013.85.7
Jun22° / 20°20414014.35.6
Jul25° / 23°16712014.16.3
Aug27° / 25°12510.6013.36.5
Sep25° / 22°20814.1012.26.1
Oct21° / 18°24414.2011.15.9
Nov17° / 13°12712.4010.15.1
Dec12° / 829.50.19.73.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 11% 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 (%)
14555
24357
34357
44258
54060
63961
73862
83763
93664
103565
113565
123466
133565
143565
153565
163565
173565
183565
193664
203664
213664
223763
233664
243664
253763
263763
273664
283664
293565
303466
313466

Chance of precipitation in May

Any precipitation

Hayama gets around 159 mm of rain over 11.9 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 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
337
437
537
637
737
838
938
1038
1139
1239
1339
1440
1540
1640
1740
1840
1940
2039
2139
2238
2338
2438
2537
2637
2736
2836
2936
3036
3136

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 37% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15136130
24837140
34638161
44438171
54239191
64039201
73839221
83739231
93539241
103440261
113240271
123140282
132940292
142740312
152640322
162440342
172240353
182140373
191939384
201739404
211638415
221537426
231436446
241335457
251234468
261133479
2710324810
2810314911
299304912
308294914
318284915

Wind in May

Winds average 17 km/h in May.

Across May, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light 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 4:57 AM to 4:34 AM, and sunset from 6:21 PM to 6:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.44:576:21
213.44:566:22
313.54:556:23
413.54:536:24
513.54:526:24
613.64:516:25
713.64:506:26
813.64:496:27
913.74:486:28
1013.74:486:29
1113.74:476:29
1213.74:466:30
1313.84:456:31
1413.84:446:32
1513.84:436:33
1613.84:426:33
1713.94:426:34
1813.94:416:35
1913.94:406:36
2014.04:406:37
2114.04:396:37
2214.04:386:38
2314.04:386:39
2414.04:376:40
2514.14:366:40
2614.14:366:41
2714.14:356:42
2814.14:356:42
2914.14:346:43
3014.24:346:44
3114.24:346:44

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.18 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 5.18 kWh/m² in May across the year — May's 5.18 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
115.1Bright
125.1Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
315.1Bright
Planning a trip in May

Hazard calendar for Hayama

In seasonPeak

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

Hayama 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 Hayama?

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

5.7
Sightseeing
5th-best month of the year
2.4
Beach & pool
6th-best month of the year

May is a reasonable time to visit Hayama for sightseeing.

What to pack for Hayama in May

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

In May, Hayama sees daytime highs around 19°C and nights near 16°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Hayama in May

The nearest coast averages about 19°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 17 km away) is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Nov 26 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Hayama 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 Hayama peaks around July 22 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 highHighModerateJul 22UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Hayama 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 Hayama is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1525 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb25Moderate
Mar23Moderate
Apr26Moderate
May21Moderate
Jun18Moderate
Jul13Moderate
Aug12Moderate
Sep12Moderate
Oct14Moderate
Nov14Moderate
Dec12Good
Location & terrain

Where is Hayama?

Hayama sits at 35.3°N, 139.6°E, 10 m above sea level, in Japan. The nearest listed city is Zushi, 2.0 km away.

Topography around Hayama

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

Within 3 km, the terrain around Hayama has only modest variations in elevation — a maximum elevation change of 207 m around an average of 34 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 237 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Hayama is covered by trees (39%), water (39%) and artificial surfaces (21%) within 3 km, water (55%) and artificial surfaces (26%) within 16 km, and water (41%), trees (34%) and artificial surfaces (20%) within 80 km.

3 km
207 m
16 km
237 m
80 km
3,737 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Zushi 2.0 km · Kamakura 5.0 km · Yokosuka 8.0 km · Sugita 12 km · Fujisawa 12 km · Kurihama 13 km · Isogo 15 km · Miura 16 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 Hayama (35.2765°, 139.5773°, elevation 10 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).