Ogawamachi weather in May

In May, Ogawamachi sees average daytime highs of 22°C and overnight lows near 13°C, with 148 mm of rain across 14.4 wet days and about 13.9 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 23°C by the end. The sky is clear or mostly clear about 22% of the time in May, and the air most often feels dry.

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 Ogawamachi's 8th-clearest and 6th-windiest month. For the whole year in context, see Ogawamachi's year-round climate.

Daytime high
22°
5th warmest
Overnight low
13°
8th coldest
Rainfall
148 mm
14.4 wet days
Daylight
13 h 54 min
4:42 AM – 6:36 PM
Cloud cover
69%
8th clearest
Wind
7 km/h
6th windiest
Solar energy
5.08 kWh/m²
Travel score
5.8
out of 10

Ogawamachi is town in Hiki district, Saitama prefecture, Japan.

Density
480/km²
people per km²
Founded
1889

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 20°C in the first days to 23°C by the end.

A typical May day in Ogawamachi reaches about 22°C in the afternoon and slips back to 13°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 26°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)
12011
22011
32011
42011
52011
62112
72112
82112
92112
102112
112112
122112
132113
142113
152213
162213
172213
182213
192214
202214
212214
222214
232214
242314
252314
262315
272315
282315
292315
302315
312315

How May really feels in Ogawamachi

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.

Ogawamachi 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 / -1°626.73.79.81.2
Feb / -1°597.64.110.61.6
Mar12° / 111134.511.72.9
Apr17° / 12312.80.912.95.0
May22° / 13°14814.4013.95.8
Jun24° / 18°19918.1014.45.2
Jul28° / 22°22220.8014.24.4
Aug29° / 23°18019.7013.44.2
Sep25° / 19°22317.3012.25.4
Oct20° / 13°21714.5011.15.6
Nov15° / 819.20.210.14.6
Dec10° / 547.21.39.62.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% 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
24555
34456
44456
54258
64258
74060
84060
93862
103862
113763
123664
133664
143664
153565
163664
173664
183664
193664
203664
213664
223664
233565
243565
253565
263466
273466
283367
293268
303268
313070

Chance of precipitation in May

Any precipitation

Ogawamachi gets around 148 mm of rain over 14.4 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 46% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
140
240
340
441
541
642
743
844
944
1045
1146
1246
1347
1447
1548
1648
1748
1848
1948
2048
2148
2248
2348
2448
2548
2648
2748
2848
2948
3048
3148

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 64% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1851320
2841420
3831520
4821620
5811720
6791830
7781930
8772030
9752041
10742141
11732151
12722251
13712261
14702361
15692371
16672481
17662581
18642691
196227101
206028111
215829121
225630131
235432131
245233141
254934152
264736162
274437172
284238182
293939192
303740212
313441223

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

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 4:33 AM, and sunset from 6:24 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.44:576:24
213.54:566:24
313.54:546:25
413.54:536:26
513.64:526:27
613.64:516:28
713.64:506:29
813.74:496:30
913.74:486:30
1013.74:476:31
1113.84:466:32
1213.84:456:33
1313.84:456:34
1413.84:446:35
1513.94:436:35
1613.94:426:36
1713.94:416:37
1814.04:406:38
1914.04:406:39
2014.04:396:40
2114.04:386:40
2214.14:386:41
2314.14:376:42
2414.14:366:43
2514.14:366:43
2614.14:356:44
2714.24:356:45
2814.24:346:46
2914.24:346:46
3014.24:336:47
3114.24:336:48

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.08 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 5.08 kWh/m² in May across the year — May's 5.08 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
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in May

Hazard calendar for Ogawamachi

In seasonPeak

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

Ogawamachi's rainy season runs March–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Ogawamachi?

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

5.8
Sightseeing
1st-best month of the year
3.9
Beach & pool
5th-best month of the year

May is a reasonable time to visit Ogawamachi for sightseeing.

What to pack for Ogawamachi in May

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

In May, Ogawamachi sees daytime highs around 22°C and nights near 13°C. Pack rain gear. Worth having: sun protection. About 14 days see rain.

rain gearsun protection

UV index in Ogawamachi 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 Ogawamachi peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 15UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Ogawamachi 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 Ogawamachi is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1426 µg/m³Dec 1814 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb21Moderate
Mar25Moderate
Apr26Moderate
May24Moderate
Jun20Moderate
Jul17Moderate
Aug16Moderate
Sep16Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Ogawamachi?

Ogawamachi sits at 36.1°N, 139.3°E, 90 m above sea level, in Japan. The nearest listed city is Ranzan, 4.0 km away.

Topography around Ogawamachi

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

Within 3 km, the terrain around Ogawamachi has only modest variations in elevation — a maximum elevation change of 244 m around an average of 134 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 948 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,671 m.

The land around Ogawamachi is covered by trees (70%) within 3 km, trees (59%) and artificial surfaces (23%) within 16 km, and trees (56%) and artificial surfaces (26%) within 80 km.

3 km
244 m
16 km
948 m
80 km
2,671 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Ranzan 4.0 km · Yorii 9.0 km · Yamata 10 km · Morohongō 14 km · Higashi-Matsuyama 14 km · Kumagaya 14 km · Sakado 15 km · Tsurugashima 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 Ogawamachi (36.0534°, 139.2661°, elevation 90 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. 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).