August weather forecast
Otaru, Japan

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Weather in August

August maintains the city's wave of warm weather, even surpassing July's average high temperatures. However, rainfall hits its peak at a staggering 119mm for the month, setting it as the wettest period for Otaru. Sea temperatures continue to be inviting, presenting ideal conditions for water activities. Humidity levels remain high, contributing to the overall warmth of the city. Round-the-clock cloud cover combined with extensive sunshine hours sets a picturesque stage for Otaru's coastal views.

Temperature

August brings the highest temperatures in Otaru, Japan, with an average high of 23°C and an average low of 16.8°C.

Humidity

In August, the average relative humidity in Otaru, Japan, is 87%.

Rainfall

The month with the most rainfall is August, when the rain falls for 19.1 days and typically aggregates up to 119mm of precipitation.

Snowfall

June through September are months without snowfall.

Sea temperature

August is the month with the warmest seawater in Otaru, with an average sea temperature of 21.6°C.
Note: For most individuals, swimming in 21.6°C is not a pleasurable activity. Breathing becomes progressively more difficult as water temperature declines below 21°C.

Daylight

The average length of the day in August in Otaru is 13h and 55min.
On the first day of the month, sunrise is at 04:25 and sunset at 18:59. On the last day of August, sunrise is at 04:58 and sunset at 18:14 JST.

Sunshine

May and August, with an average of 8.4h of sunshine, are months with the most sunshine in Otaru, Japan.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 5 in August, converts into the following recommendations:
Exercise prevention - Warding off sunburn is urged. When the Sun is at its strongest around midday, find shade and limit exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be mindful! Sand and water reflections can up the Sun's UV exposure.
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FAQ

What month is the hottest in Otaru?

August, known for its average high temperature of 23°C and an average low temperature of 16.8°C, is the warmest month in Otaru.

What are the temperatures in Otaru in August?

The average high-temperature, in August, in Otaru, is 23°C, while the average low-temperature is 16.8°C.

What is the average humidity in August in Otaru?

In Otaru, the average relative humidity in August is 87%.

What is the rainiest month in Otaru?

August is the month with the most rainfall in Otaru. Rain falls for 19.1 days and accumulates 119mm of precipitation.

How many days does it rain in August in Otaru?

In Otaru, during August, the rain falls for 19.1 days and regularly aggregates up to 119mm of precipitation.

When it does not snow in Otaru?

In Otaru, snow does not fall in June through September.

When is the sea warmest in Otaru?

The month with the warmest seawater in Otaru, Japan, is August, with an average sea temperature of 21.6°C.

What is the sea water temperature in August in Otaru?

In Otaru, Japan, the average seawater temperature in August is 21.6°C. For most, swimming in 21.6°C is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C to 15°C.

What is the average length of the day in August in Otaru?

The average day length in August in Otaru, Japan, is 13h and 55min.

What time are sunrise and sunset in August in Otaru?

In August, on the first day of the month, sunrise is at 04:25 and sunset at 18:59. On the last day of the month, in Otaru, sunrise is at 04:58 and sunset at 18:14 JST.

What are the months with the most sunshine in Otaru?

The months with the most sunshine in Otaru, Japan, are May and August, with an average of 8.4h of sunshine.

How many hours of sunshine does Otaru have in August?

In August, the average sunshine duration in Otaru, Japan, is 8.4h.

When is the highest UV index in Otaru?

June through August, with an average maximum UV index of 5, are months with the highest UV index in Otaru.

What is the UV index intensity in August in Otaru?

In August, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJAugustSOND
Jul
August
Sep
Average high temperature
22°C
23°C
19.5°C
Average low temperature
15.5°C
16.8°C
13.2°C
Average pressure
1008.5mbar
1009.5mbar
1013.4mbar
Average wind speed
9.2km/h
9.7km/h
11.9km/h
Average max. wind speed
9.8km/h
10.6km/h
12.4km/h
Average wind speed gusts
14.1km/h
14.8km/h
18.1km/h
Average humidity
88%
87%
83%
Average rainfall
94mm
119mm
86mm
Average rainfall days
20.2
19.1
18.3
Average snowfall
0mm
0mm
0mm
Average snowfall days
0
0
0
Average sea temperature
18.7°C
21.6°C
20.6°C
Average daylight
15h 0min
13h 5min
12h 3min
Average sunshine
7h 3min
8h 2min
7h 4min
Average sunshine days
9.5
9.9
9.2
Average UV index
5
5
4
Average cloud cover
54%
49%
42%
Average visibility
8km
9km
9km

Average temperature in August
Otaru, Japan

Average temperature in August - Otaru, Japan
  • Average high temperature in August: 23°C

The warmest month (with the highest average high temperature) is August (23°C).
The month with the lowest average high temperature is January (-3.3°C).

  • Average low temperature in August: 16.8°C

The month with the highest average low temperature is August (16.8°C).
The coldest month (with the lowest average low temperature) is February (-8.2°C).

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Average pressure in August
Otaru, Japan

Average pressure in August - Otaru, Japan
  • Average pressure in August: 1009.5mbar

The month with the highest atmospheric pressure is November (1016.1mbar).
The month with the lowest atmospheric pressure is July (1008.5mbar).

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Average wind speed in August
Otaru, Japan

Average wind speed in August - Otaru, Japan
  • Average wind speed in August: 9.7km/h

The windiest month (with the highest average wind speed) is December (19km/h).
The calmest month (with the lowest average wind speed) is July (9.2km/h).

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Average humidity in August
Otaru, Japan

Average humidity in August - Otaru, Japan
  • Average humidity in August: 87%

The month with the highest relative humidity is July (88%).
The months with the lowest relative humidity are April and October (79%).

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Average rainfall in August
Otaru, Japan

Average rainfall in August - Otaru, Japan
  • Average rainfall in August: 119mm

The wettest month (with the highest rainfall) is August (119mm).
The driest month (with the least rainfall) is April (43mm).

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Average rainfall days in August
Otaru, Japan

Average rainfall days in August - Otaru, Japan
  • Average rainfall days in August: 19.1 days

The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is February (2.5 days).

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Average snowfall in August
Otaru, Japan

Average snowfall in August - Otaru, Japan
  • Average snowfall in August: 0mm

The month with the highest snowfall is January (369mm).
The months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in August
Otaru, Japan

Average snowfall days in August - Otaru, Japan
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (26 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in August
Otaru, Japan

Average sea temperature in August - Otaru, Japan
  • Average sea temperature in August: 21.6°C

The best month for swimming (with the highest average sea temperature) is August (21.6°C).
The coldest months (with the lowest average sea temperature) are February and March (5.3°C).

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Average daylight in August /
Average sunshine in August
Otaru, Japan

Average daylight in August / Average sunshine in August - Otaru, Japan
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in August: 8h and 2min

The months with the most sunshine are May and August (Average sunshine: 8h and 24min).
The month with the least sunshine is January (Average sunshine: 1h and 12min).

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Average sunshine days in August
Otaru, Japan

Average sunshine days in August - Otaru, Japan
  • Average sunshine days in August: 9.9 days

The month with the most sunshine days is May (14.8 days).
The month with the least sunshine days is January (3.1 days).

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Average UV index in August
Otaru, Japan

Average UV index in August - Otaru, Japan
  • Average UV index in August: 5

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

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Average cloud cover in August
Otaru, Japan

Average cloud cover in August - Otaru, Japan
  • Average cloud cover in August: 49

The month with the most cloud cover is January (Cloud cover 89).
The month with the least cloud cover is September (Cloud cover 42).

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Average visibility in August
Otaru, Japan

Average visibility in August - Otaru, Japan
  • Average visibility in August: 9km

The month with the highest visibility is October (10km).
The month with the lowest visibility is January (7km).

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Otaru, Japan

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