October weather forecast
Otaru, Japan

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October

Weather in October

In October, Otaru experiences a significant shift to fall with temperatures seeing a prominent decrease marking a definitive end of the summer heat. This season change coincides with the first instance of snowfall since April, a significant change from the summer rain. While the sea temperature dips, it remains relatively welcoming, hinting at the last possibilities for water sports. A nominal increase in wind speed signals the impending winter months. Furthermore, the daylight hours continue to lessen, yet provide ample opportunity for enjoying the rich autumn hues of the city.

Temperature

October's arrival in Otaru, Japan, correlates with a reduction in the average high-temperature, down from an enjoyable 19.5°C (67.1°F) in September to a cool 12.8°C (55°F). The average temperature drops to a frosty 6.9°C (44.4°F) during the night in the month of October.

Humidity

The months with the lowest humidity in Otaru are April and October, with an average relative humidity of 79%.

Rainfall

In Otaru, in October, during 16.9 rainfall days, 63mm (2.48") of precipitation is typically accumulated. In Otaru, during the entire year, the rain falls for 151.8 days and collects up to 851mm (33.5") of precipitation.

Snowfall

Months with snowfall in Otaru, Japan, are January through May, October through December. October is the first month it typically snows in Otaru, Japan. Throughout October, in the average 0.6 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, in Otaru, Japan, there are 103.4 snowfall days, and 1437mm (56.57") of snow is accumulated.

Sea temperature

In Otaru, in October, the average water temperature is 16.7°C (62.1°F).
Note: Swimming in 16.7°C (62.1°F) is not an enjoyable experience for most. Breathing becomes progressively more challenging as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

The average length of the day in October is 11h and 3min.
On the first day of October, sunrise is at 05:33 and sunset at 17:17. On the last day of the month, sunrise is at 06:09 and sunset at 16:29 JST.

Sunshine

In October, the average sunshine is 6.1h.

UV index

The average daily maximum UV index in October is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum UV index of 2 in October translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average October temperature in Otaru?
In Otaru, in October, the average high-temperature is 12.8°C (55°F), and the average low-temperature is 6.9°C (44.4°F).
What is the least humid month in Otaru?
The months with the lowest humidity in Otaru are April and October, with an average relative humidity of 79%.
What is the average humidity in October in Otaru?
The average relative humidity in October is 79%.
How many days does it rain in October in Otaru?
In Otaru, Japan, in October, it is raining for 16.9 days, with typically 63mm (2.48") of accumulated precipitation.
When does it start to snow in Otaru?
October is the first month it typically snows. Throughout October, in the average 0.6 snowfall days, it receives 2mm (0.08") of snow.
What is the sea temperature in October in Otaru?
In October, the average sea temperature is 16.7°C (62.1°F). For swimming, a surface water temperature of 16.7°C (62.1°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
What is the average length of the day in October in Otaru?
In Otaru, Japan, the average day length in October is 11h and 3min.
When are sunrise and sunset in October in Otaru?
In October, on the first day of the month, sunrise is at 05:33 and sunset at 17:17. On the last day of the month, in Otaru, Japan, sunrise is at 06:09 and sunset at 16:29 JST.
How long on average sun shines in October in Otaru?
In Otaru, Japan, the average sunshine duration in October is 6.1h.
What is the UV index reading in October in Otaru?
In Otaru, Japan, the average daily maximum UV index in October is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASOctoberND
Sep
October
Nov
Average high temperature
19.5°C
12.8°C
5.4°C
Average low temperature
13.2°C
6.9°C
0.6°C
Average pressure
1013.4mbar
1015.9mbar
1016.1mbar
Average wind speed
11.9km/h
15.8km/h
17km/h
Average max. wind speed
12.4km/h
17.1km/h
18.2km/h
Average wind speed gusts
18.1km/h
23.6km/h
24.8km/h
Average humidity
83%
79%
83%
Average rainfall
86mm
63mm
71mm
Average rainfall days
18.3
16.9
13.5
Average snowfall
0mm
2mm
154mm
Average snowfall days
0
0.6
10.7
Average sea temperature
20.6°C
16.7°C
12.3°C
Average daylight
12h 3min
11h 0min
9h 4min
Average sunshine
7h 4min
6h 1min
3h 0min
Average sunshine days
9.2
11.5
7.2
Average UV index
4
2
1
Average cloud cover
42%
47%
70%
Average visibility
9km
10km
9km
Average temperature in October
Otaru, Japan
  • Average high temperature in October: 12.8°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 October: 6.9°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).

Average pressure in October
Otaru, Japan
  • Average pressure in October: 1015.9mbar

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

Average wind speed in October
Otaru, Japan
  • Average wind speed in October: 15.8km/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).

Average humidity in October
Otaru, Japan
  • Average humidity in October: 79%

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

Average rainfall in October
Otaru, Japan
  • Average rainfall in October: 63mm

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

Average rainfall days in October
Otaru, Japan
  • Average rainfall days in October: 16.9 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).

Average snowfall in October
Otaru, Japan
  • Average snowfall in October: 2mm

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

Average snowfall days in October
Otaru, Japan
  • Average snowfall days in October: 0.6 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).

Average sea temperature in October
Otaru, Japan
  • Average sea temperature in October: 16.7°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).

Average daylight in October /
Average sunshine in October
Otaru, Japan
  • Average daylight in October: 11h and 0min

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 October: 6h and 1min

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).

Average sunshine days in October
Otaru, Japan
  • Average sunshine days in October: 11.5 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).

Average UV index in October
Otaru, Japan
  • Average UV index in October: 2

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).

Average cloud cover in October
Otaru, Japan
  • Average cloud cover in October: 47

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

Average visibility in October
Otaru, Japan
  • Average visibility in October: 10km

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

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