Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
October
Weather in October
Temperature
Iwanai observes a minor decrease in the average high-temperature with the arrival of October, falling from September's enjoyable 19.6°C (67.3°F) to a fresh 12.6°C (54.7°F). Iwanai reports an average low-temperature of 5.9°C (42.6°F) during the nights of October.Humidity
In October, the average relative humidity is 81%.Rainfall
In October, the rain falls for 17.1 days. Throughout October, 64mm (2.52") of precipitation is accumulated. Throughout the year, there are 157.1 rainfall days, and 887mm (34.92") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 1.3 snowfall days, it receives 16mm (0.63") of snow. Throughout the year, there are 120.8 snowfall days, and 2288mm (90.08") of snow is accumulated.Daylight
In Iwanai, the average length of the day in October is 11h and 3min.On the first day of the month, sunrise is at 05:35 and sunset at 17:19. On the last day of October, sunrise is at 06:11 and sunset at 16:31 JST.
Sunshine
In October, the average sunshine is 6.2h.UV index
In October, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 2 during October leads to these instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are October temperatures?
What is the average humidity in October?
How much does it rain in October?
When does it start to snow?
How many hours of daylight does Iwanai have in October?
When are sunrise and sunset in October?
How long on average sun shines in October?
How high is the UV index in October?
Average temperature in October
Iwanai, Japan
- Average high temperature in October: 12.6°C
The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (-3.8°C).
- Average low temperature in October: 5.9°C
The month with the highest average low temperature is August (16.1°C).
The coldest month (with the lowest average low temperature) is February (-8.9°C).
Average pressure in October
Iwanai, Japan
- Average pressure in October: 1016.1mbar
The month with the highest atmospheric pressure is November (1016.4mbar).
The month with the lowest atmospheric pressure is July (1008.4mbar).
Average wind speed in October
Iwanai, Japan
- Average wind speed in October: 12.3km/h
The windiest month (with the highest average wind speed) is December (14.5km/h).
The calmest month (with the lowest average wind speed) is August (8km/h).
Average humidity in October
Iwanai, Japan
- Average humidity in October: 81%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (79%).
Average rainfall in October
Iwanai, Japan
- Average rainfall in October: 64mm
The wettest month (with the highest rainfall) is August (105mm).
The driest month (with the least rainfall) is April (52mm).
Average rainfall days in October
Iwanai, Japan
- Average rainfall days in October: 17.1 days
The month with the highest number of rainy days is August (19.1 days).
The month with the least rainy days is January (3.4 days).
Average snowfall in October
Iwanai, Japan
- Average snowfall in October: 16mm
The month with the highest snowfall is December (598mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in October
Iwanai, Japan
- Average snowfall days in October: 1.3 days
The month with the highest number of snowfall days is January (28.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Iwanai, Japan
- Average daylight in October: 11h and 1min
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 24min).
Average sunshine days in October
Iwanai, Japan
- Average sunshine days in October: 10.2 days
The month with the most sunshine days is May (13.3 days).
The month with the least sunshine days is January (2.7 days).
Average UV index in October
Iwanai, Japan
- Average UV index in October: 2
The months with the highest UV index are 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
Iwanai, Japan
- Average cloud cover in October: 46
The month with the most cloud cover is January (Cloud cover 86).
The month with the least cloud cover is September (Cloud cover 43).
Average visibility in October
Iwanai, Japan
- Average visibility in October: 9km
The months with the highest visibility are April, May and October (9km).
The months with the lowest visibility are January, February, July, August and December (7km).
