yearsofweather

Otaru in August:
warm, rain on many days

Otaru, Japan · Records from 2006 to 2025. Not a forecast.

Mean high27°Hottest day 33.1° (2023)
Mean low19°Coldest night 13.3° (2020)
Rain days11 days6-16 by year
Rainfall151mmDaylight 14.6 → 13.3 h
Otaru's 12 months iBest: June, July and September
Trip types Sightseeing on foot Finemild
Humidity83%13 muggy days
Clear days3 days12 overcast days
Mean wind11 km/hRarely windy
Sunrise / sunset (15th)04:41 / 18:40Daylight 14.6 → 13.3 h

Otaru in August

The warmest month at midday, good for sitting at an outdoor table by the canal. Crowds gather around the Obon holiday. Wet days increase from July, so a folding umbrella gives peace of mind.

Daytime highs averaged 27°C, with nights at 19°C. Comfortably warm without being punishing. About 11 days a month saw rain, enough that a wet-weather plan was worth having. The driest year, 2011, had 6 rain days; the wettest, 2013, had 16.

With up to 14.6 hours of daylight, dinner plans could still start in the light. Highs passed 30°C on 2 days on average. Not every year was typical: 2023 ran 3.1°C warmer than the mean, with highs of 29.6°C.

Typhoons i

3 of the last 20 years had a tropical storm pass within 300 km this month.

  • Mindulle (2016), 164 km away tropical storm
  • Chanthu (2016), 185 km away tropical storm
  • Cimaron (2018), 199 km away tropical storm
1 2 3 4 5 6 7 38 39 110 11 12

Date by date i

‹ July August 2027 September ›
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
1-7rain on 31% of days27° 19°
8-14rain on 36% of days27° 19°
15-21rain on 40% of days26° 19°
22-28rain on 34% of days26° 18°
29-31rain on 33% of days26° 18°

0-5/206-8/209-11/2012-20/20

1-7rain on 31% of days27° 19°
8-14rain on 36% of days27° 19°
15-21rain on 40% of days26° 19°
22-28rain on 34% of days26° 18°
29-31rain on 33% of days26° 18°
Tap another date to change

2006none
2007none
20081mm
200914mm
2010none
20113mm
201214mm
20133mm
2014none
2015none
201631mm
2017none
2018none
20194mm
20202mm
2021none
20225mm
202334mm
202415mm
20254mm
Holidays in August (2027)
  • August 11 Mountain Day
  • August 13 to August 16 Obon

1 Local public holiday or break (busier, pricier)

Your trip dates, the past 20 years

Trip dates ~

You can also click two dates on the axis. Hover a cell to see that day's rain.
Trip rain days Month rain days
2006
2 d 8 d
2007
4 d 10 d
2008
2 d 8 d
2009
1 d 10 d
2010
2 d 10 d
2011
0 d 6 d
2012
3 d 6 d
2013
0 d 16 d
2014
4 d 12 d
2015
3 d 9 d
2016
1 d 12 d
2017
0 d 8 d
2018
0 d 14 d
2019
0 d 12 d
2020
5 d 11 d
2021
3 d 9 d
2022
3 d 14 d
2023
5 d 13 d
2024
2 d 13 d
2025
3 d 16 d
Years with rain
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
7
4
6
6
6
7
7
9
11
6
8
5
5
6
8
10
8
4
9
12
5
9
11
8
6
2
7
5
6
7
7
Rain days on trip
24212030431000533523

No rain1-9 mm10 mm or more Dates outside your trip are dimmed.

One row per year, one cell per day. 2011 had 6 rain days, 2013 had 16.

Otaru through the year

MonthHighLowRain daysRainfall
January −1°−6°23 days148mm
February 0°−6°19 days109mm
March 5°−2°15 days83mm
April 11°3°9 days58mm
May 18°8°9 days56mm
JuneGood 21°13°8 days65mm
JulyGood 25°18°8 days98mm
August 27°19°11 days151mm
SeptemberGood 23°15°10 days123mm
October 16°8°14 days143mm
November 8°2°18 days160mm
December 1°−4°22 days157mm

Common questions

Does it rain a lot in Otaru in August?

Over the past 20 years August averaged 11 rain days (1 mm or more) out of 31. Individual years ran from 6 in the driest to 16 in the wettest.

What should I wear in Otaru in August?

Days averaged 27°C and nights 19°C. Pack a compact umbrella, T-shirts, a light layer for the evenings, and sunscreen plus a hat.

Is August a good time to visit Otaru?

On warmth and rain days alone, Otaru's easiest months were June, July and September. August ranked 4 of 12.

Is Otaru humid in August?

Mean relative humidity was 83%, with about 13 muggy days (dew point of 20°C or more) in the month.