May weather forecast
Otaru, Japan

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Weather in May

May brings a significantly warmer climate to the city of Otaru. It is notably the first month of the year with an average high temperature exceeding 10°C, a significant jump from the 7°C in April. An increase in rainfall dampens the warmer period and contributes to heightened humidity. Sea temperatures become more inviting, hinting at the start of the beach season. Furthermore, an increasing UV index signals a need for heightened sun protection.

Temperature

The start of May signals an increase in the average high-temperature, moving from a chilly 7°C in April to a mild 13.8°C. Throughout the month of May, the nighttime temperature dips to an average of 6.4°C.

Humidity

In Otaru, the average relative humidity in May is 80%.

Rainfall

In Otaru, in May, during 14.4 rainfall days, 54mm of precipitation is typically accumulated. Throughout the year, there are 151.8 rainfall days, and 851mm of precipitation is accumulated.

Snowfall

Months with snowfall in Otaru are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Otaru aggregates 1mm of snow. Throughout the year, there are 103.4 snowfall days, and 1437mm of snow is accumulated.

Sea temperature

In Otaru, in May, the average water temperature is 10.1°C.
Note: Being in 10.1°C waters at 13°C is discomforting, but anything below 10°C can jeopardize breathing and induce cold shock, factoring in physical endurance.

Daylight

The average length of the day in May in Otaru is 14h and 40min.
On the first day of the month, sunrise is at 04:30 and sunset at 18:36. On the last day of May, in Otaru, sunrise is at 03:59 and sunset at 19:07 JST.

Sunshine

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

UV index

The average daily maximum UV index in May in Otaru, Japan, is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: An average maximum UV index of 4 in May leads to these recommendations:
Act with care - The need to guard against sun damage is communicated. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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FAQ

What is the temperature in May in Otaru?

In May, in Otaru, the average high-temperature is 13.8°C, and the average low-temperature is 6.4°C.

What is the average humidity in May in Otaru?

The average relative humidity in May in Otaru, Japan, is 80%.

How many days does it rain in May in Otaru?

In Otaru, Japan, in May, during 14.4 rainfall days, 54mm of precipitation is typically accumulated.

What is the last month it snows in Otaru?

May is the last month it regularly snows in Otaru, Japan. During 0.3 snowfall days, in May, Otaru aggregates 1mm of snow.

What is the water temperature in May in Otaru?

In Otaru, in May, the average water temperature is 10.1°C. Swimming in 10.1°C is considered life-threatening. Even a few minutes in 13°C water is uncomfortable, and swimming below 10°C may cause total loss of breathing control and cold shock, depending on a person's physique.

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

In May, the average day length is 14h and 40min.

When is the sunrise / sunset in May in Otaru?

On the first day of May in Otaru, Japan, sunrise is at 04:30 and sunset at 18:36. On the last day of the month, sunrise is at 03:59 and sunset at 19:07 JST.

What is the month with the most sunshine in Otaru?

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

How many hours of sunshine does Otaru have in May?

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

What is the UV index intensity in May in Otaru?

In May, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMayJJASOND
Apr
May
Jun
Average high temperature
7°C
13.8°C
17.8°C
Average low temperature
1°C
6.4°C
10.7°C
Average pressure
1012.2mbar
1010.2mbar
1008.8mbar
Average wind speed
14.9km/h
12.8km/h
10.4km/h
Average max. wind speed
16.1km/h
13.7km/h
11.2km/h
Average wind speed gusts
22.6km/h
19.7km/h
15.9km/h
Average humidity
79%
80%
86%
Average rainfall
43mm
54mm
70mm
Average rainfall days
12.7
14.4
16.4
Average snowfall
47mm
1mm
0mm
Average snowfall days
4.6
0.3
0
Average sea temperature
7.2°C
10.1°C
15°C
Average daylight
13h 2min
14h 4min
15h 2min
Average sunshine
8h 0min
8h 2min
7h 3min
Average sunshine days
12.7
14.8
10.8
Average UV index
3
4
5
Average cloud cover
48%
46%
54%
Average visibility
9km
9km
8km

Average temperature in May
Otaru, Japan

Average temperature in May - Otaru, Japan
  • Average high temperature in May: 13.8°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 May: 6.4°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 May
Otaru, Japan

Average pressure in May - Otaru, Japan
  • Average pressure in May: 1010.2mbar

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 May
Otaru, Japan

Average wind speed in May - Otaru, Japan
  • Average wind speed in May: 12.8km/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 May
Otaru, Japan

Average humidity in May - Otaru, Japan
  • Average humidity in May: 80%

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 May
Otaru, Japan

Average rainfall in May - Otaru, Japan
  • Average rainfall in May: 54mm

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 May
Otaru, Japan

Average rainfall days in May - Otaru, Japan
  • Average rainfall days in May: 14.4 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 May
Otaru, Japan

Average snowfall in May - Otaru, Japan
  • Average snowfall in May: 1mm

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 May
Otaru, Japan

Average snowfall days in May - Otaru, Japan
  • Average snowfall days in May: 0.3 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 May
Otaru, Japan

Average sea temperature in May - Otaru, Japan
  • Average sea temperature in May: 10.1°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 May /
Average sunshine in May
Otaru, Japan

Average daylight in May / Average sunshine in May - Otaru, Japan
  • Average daylight in May: 14h and 4min

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 May: 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 May
Otaru, Japan

Average sunshine days in May - Otaru, Japan
  • Average sunshine days in May: 14.8 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 May
Otaru, Japan

Average UV index in May - Otaru, Japan
  • Average UV index in May: 4

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 May
Otaru, Japan

Average cloud cover in May - Otaru, Japan
  • Average cloud cover in May: 46

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 May
Otaru, Japan

Average visibility in May - Otaru, Japan
  • Average visibility in May: 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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