January −1° · ☂ 23 February 0° · ☂ 19 March 5° · ☂ 15 April 11° · ☂ 9 May 18° · ☂ 9 ★ June21° · ☂ 8 ★ July25° · ☂ 8 August 27° · ☂ 11 ★ September23° · ☂ 10 October 16° · ☂ 14 November 8° · ☂ 18 December 1° · ☂ 22 Otaru in May:cool and fresh, rain on many days Otaru, Japan · Records from 2006 to 2025. Not a forecast.
Mean high 18° Hottest day 29.6° (2019)
Mean low 8° Coldest night 1° (2006)
Rain days 9 days 6-14 by year
Rainfall 56mm Daylight 14.1 → 15.1 h
Otaru's 12 months i Best: June, July and September
1 2 3 4 5 6 7 8 9 10 11 12
Trip types Sightseeing on foot Goodmild
Humidity 77% 0 muggy days
Clear days 5 days 11 overcast days
Mean wind 14 km/h Rarely windy
Sunrise / sunset (15th) 04:12 / 18:52 Daylight 14.1 → 15.1 h
Otaru in May Crowds grow during Golden Week and sushi restaurants may have long lines. The weather has softened enough for good harbour walks. The coast can be windy, so bring a windbreaker.
Neither hot nor cold: 18°C by day and 8°C after dark. Spending hours on foot was easy. With 9 rain days on average, a wet day was rarely more than a few days away. Counts moved moderately between years: 6 in 2019, 14 in 2021.
With up to 15.1 hours of daylight, dinner plans could still start in the light. About 3 nights a month dipped under 5°C, cold enough to want a jacket for the walk back. May 2019 averaged 19.9°C by day, 2.4°C above the 20-year mean. The coldest night came in 2006, at 1°C.
Typhoons i Typhoons: August to October
Date by date i Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
May 1 Saturday 1 rain in 6 of 20 yrs 6/20 15° 6° May 1 rain on 30% of days 15° 6°
May 2 Sunday 2 rain in 6 of 20 yrs 6/20 16° 6° May 3 Monday 3 rain in 7 of 20 yrs 7/20 17° 7° May 4 Tuesday 4 rain in 7 of 20 yrs 7/20 17° 7° May 5 Wednesday 5 rain in 7 of 20 yrs 7/20 16° 7° May 6 Thursday 6 rain in 11 of 20 yrs 11/20 17° 7° May 7 Friday 7 rain in 9 of 20 yrs 9/20 16° 7° May 8 Saturday 8 rain in 2 of 20 yrs 2/20 15° 6° 2-8 rain on 35% of days 16° 7°
May 9 Sunday 9 rain in 2 of 20 yrs 2/20 16° 6° May 10 Monday 10 rain in 4 of 20 yrs 4/20 15° 7° May 11 Tuesday 11 rain in 6 of 20 yrs 6/20 16° 7° May 12 Wednesday 12 rain in 7 of 20 yrs 7/20 16° 7° May 13 Thursday 13 rain in 9 of 20 yrs 9/20 16° 7° May 14 Friday 14 rain in 6 of 20 yrs 6/20 16° 7° May 15 Saturday 15 rain in 6 of 20 yrs 6/20 17° 8° 9-15 rain on 29% of days 16° 7°
May 16 Sunday 16 rain in 8 of 20 yrs 8/20 18° 8° May 17 Monday 17 rain in 7 of 20 yrs 7/20 18° 9° May 18 Tuesday 18 rain in 2 of 20 yrs 2/20 19° 9° May 19 Wednesday 19 rain in 4 of 20 yrs 4/20 18° 9° May 20 Thursday 20 rain in 7 of 20 yrs 7/20 18° 9° May 21 Friday 21 rain in 7 of 20 yrs 7/20 19° 9° May 22 Saturday 22 rain in 5 of 20 yrs 5/20 19° 9° 16-22 rain on 29% of days 19° 9°
May 23 Sunday 23 rain in 3 of 20 yrs 3/20 18° 10° May 24 Monday 24 rain in 4 of 20 yrs 4/20 18° 9° May 25 Tuesday 25 rain in 8 of 20 yrs 8/20 18° 10° May 26 Wednesday 26 rain in 6 of 20 yrs 6/20 19° 10° May 27 Thursday 27 rain in 9 of 20 yrs 9/20 19° 10° May 28 Friday 28 rain in 7 of 20 yrs 7/20 19° 10° May 29 Saturday 29 rain in 4 of 20 yrs 4/20 19° 10° 23-29 rain on 29% of days 19° 10°
May 30 Sunday 30 rain in 2 of 20 yrs 2/20 20° 10° May 31 Monday 31 rain in 8 of 20 yrs 8/20 19° 10°
30-31 rain on 25% of days 20° 10°
May 1 rain on 30% of days 15° 6° 2-8 rain on 35% of days 16° 7° 9-15 rain on 29% of days 16° 7° 16-22 rain on 29% of days 19° 9° 23-29 rain on 29% of days 19° 10° 30-31 rain on 25% of days 20° 10°
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
May 1 Monday 1 rain in 6 of 20 yrs 6/20 15° 6° May 2 Tuesday 2 rain in 6 of 20 yrs 6/20 16° 6° May 3 Wednesday 3 rain in 7 of 20 yrs 7/20 17° 7° May 4 Thursday 4 rain in 7 of 20 yrs 7/20 17° 7° May 5 Friday 5 rain in 7 of 20 yrs 7/20 16° 7° May 6 Saturday 6 rain in 11 of 20 yrs 11/20 17° 7° 1-6 rain on 37% of days 16° 7°
May 7 Sunday 7 rain in 9 of 20 yrs 9/20 16° 7° May 8 Monday 8 rain in 2 of 20 yrs 2/20 15° 6° May 9 Tuesday 9 rain in 2 of 20 yrs 2/20 16° 6° May 10 Wednesday 10 rain in 4 of 20 yrs 4/20 15° 7° May 11 Thursday 11 rain in 6 of 20 yrs 6/20 16° 7° May 12 Friday 12 rain in 7 of 20 yrs 7/20 16° 7° May 13 Saturday 13 rain in 9 of 20 yrs 9/20 16° 7° 7-13 rain on 28% of days 16° 7°
May 14 Sunday 14 rain in 6 of 20 yrs 6/20 16° 7° May 15 Monday 15 rain in 6 of 20 yrs 6/20 17° 8° May 16 Tuesday 16 rain in 8 of 20 yrs 8/20 18° 8° May 17 Wednesday 17 rain in 7 of 20 yrs 7/20 18° 9° May 18 Thursday 18 rain in 2 of 20 yrs 2/20 19° 9° May 19 Friday 19 rain in 4 of 20 yrs 4/20 18° 9° May 20 Saturday 20 rain in 7 of 20 yrs 7/20 18° 9° 14-20 rain on 29% of days 18° 8°
May 21 Sunday 21 rain in 7 of 20 yrs 7/20 19° 9° May 22 Monday 22 rain in 5 of 20 yrs 5/20 19° 9° May 23 Tuesday 23 rain in 3 of 20 yrs 3/20 18° 10° May 24 Wednesday 24 rain in 4 of 20 yrs 4/20 18° 9° May 25 Thursday 25 rain in 8 of 20 yrs 8/20 18° 10° May 26 Friday 26 rain in 6 of 20 yrs 6/20 19° 10° May 27 Saturday 27 rain in 9 of 20 yrs 9/20 19° 10° 21-27 rain on 30% of days 19° 10°
May 28 Sunday 28 rain in 7 of 20 yrs 7/20 19° 10° May 29 Monday 29 rain in 4 of 20 yrs 4/20 19° 10° May 30 Tuesday 30 rain in 2 of 20 yrs 2/20 20° 10° May 31 Wednesday 31 rain in 8 of 20 yrs 8/20 19° 10°
28-31 rain on 26% of days 19° 10°
1-6 rain on 37% of days 16° 7° 7-13 rain on 28% of days 16° 7° 14-20 rain on 29% of days 18° 8° 21-27 rain on 30% of days 19° 10° 28-31 rain on 26% of days 19° 10°
Tap another date to change
2006 none
2007 none
2008 4mm
2009 none
2010 4mm
2011 none
2012 7mm
2013 7mm
2014 none
2015 none
2016 2mm
2017 2mm
2018 11mm
2019 3mm
2020 5mm
2021 none
2022 none
2023 7mm
2024 22mm
2025 none
Holidays in May (2027) April 29 to May 5 Golden WeekMay 3 Constitution Memorial DayMay 4 Greenery DayMay 5 Children's DayMay 31 Memorial Day 1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)
Day by day temperature i 5° 14° 22° 31° 1 8 15 22 29 31
Your trip dates, the past 20 years Trip dates May 1 (Sat) 2 (Sun) 3 (Mon) 4 (Tue) 5 (Wed) 6 (Thu) 7 (Fri) 8 (Sat) 9 (Sun) 10 (Mon) 11 (Tue) 12 (Wed) 13 (Thu) 14 (Fri) 15 (Sat) 16 (Sun) 17 (Mon) 18 (Tue) 19 (Wed) 20 (Thu) 21 (Fri) 22 (Sat) 23 (Sun) 24 (Mon) 25 (Tue) 26 (Wed) 27 (Thu) 28 (Fri) 29 (Sat) 30 (Sun) 31 (Mon) ~ May 1 (Sat) 2 (Sun) 3 (Mon) 4 (Tue) 5 (Wed) 6 (Thu) 7 (Fri) 8 (Sat) 9 (Sun) 10 (Mon) 11 (Tue) 12 (Wed) 13 (Thu) 14 (Fri) 15 (Sat) 16 (Sun) 17 (Mon) 18 (Tue) 19 (Wed) 20 (Thu) 21 (Fri) 22 (Sat) 23 (Sun) 24 (Mon) 25 (Tue) 26 (Wed) 27 (Thu) 28 (Fri) 29 (Sat) 30 (Sun) 31 (Mon) 1-7 8-14 15-21 22-end Whole month
You can also click two dates on the axis. Hover a cell to see that day's rain. By year Driest trips first
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Trip rain days Month rain days Tap a date to start, tap another to end. Each cell is that date in one year. '06 '07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17 '18 '19 '20 '21 '22 '23 '24 '25
of 20 Dates outside your trip are dimmed.
One row per year, one cell per day. 2019 had 6 rain days, 2021 had 14.
What to pack Jeans or light trousers, a tee and a thin sweater were the easy uniform for 18°C days. After dark, a proper jacket was welcome. On average 8 days still reached 20°C and 3 nights still dipped below 5°C.
Rainy days were mixed in often enough that shoes you cannot get wet are a bad bet.
Common questions Does it rain a lot in Otaru in May? Over the past 20 years May averaged 9 rain days (1 mm or more) out of 31. Individual years ran from 6 in the driest to 14 in the wettest.
What should I wear in Otaru in May? Days averaged 18°C and nights 8°C. Pack a compact umbrella, a waterproof jacket, and a sweater plus a light jacket.
Is May a good time to visit Otaru? On warmth and rain days alone, Otaru's easiest months were June, July and September. May ranked 5 of 12.
How many clear days does Otaru get in May? About 5 clear days (under 30% cloud on average) and 11 overcast days (80% or more).
Previous month Otaru in April Next month Otaru in June Whole year Otaru weather by month Where to go May By country Japan: all cities this month