October weather forecast
Summit, WA

Weather in October

October, the same as September, in Summit, Washington, is a moderate autumn month, with average temperature fluctuating between 58.3°F (14.6°C) and 43.2°F (6.2°C).

Temperature

In October, the average high-temperature drops, from a pleasant 69.6°F (20.9°C) in September, to a mild 58.3°F (14.6°C). The average low-temperature, in Summit, is 43.2°F (6.2°C).

Humidity

In Summit, the average relative humidity is 80%.

Rainfall

In October, the rain falls for 16.2 days. Throughout October, 3.74" (95mm) of precipitation is accumulated. In Summit, during the entire year, the rain falls for 183.4 days and collects up to 32.48" (825mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In October, the average length of the day is 10.8h.

Sunshine

The average sunshine in October is 5.5h.

UV index

Months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In October, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in October in Summit?

The average relative humidity in October in Summit is 80%.

How much does it rain in Summit in October?

In Summit, Washington, in October, it is raining for 16.2 days, with typically 3.74" (95mm) of accumulated precipitation.

When it does not snow in Summit?

In Summit snow does not fall in April through October.

Does it snow in Summit in October?

In Summit, Washington, in October, it doesn't snow. In November, it regularly snows.

How many hours of daylight does Summit have in October?

The average length of the day in October in Summit is 10.8h.

How long on average sun shines in October in Summit?

The average sunshine in October is 5.5h.

What is the month with the lowest UV index in Summit?

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in October in Summit?

In October, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to the UV radiation.

Average temperature in October
Summit, WA

Average temperature in October - Summit, WA
  • Average high temperature in October: 58.3°F

The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (42.8°F).

  • Average low temperature in October: 43.2°F

The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is December (32.7°F).

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Average pressure in October
Summit, WA

Average pressure in October - Summit, WA
  • Average pressure in October: 30.04"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is August (30").

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Average wind speed in October
Summit, WA

Average wind speed in October - Summit, WA
  • Average wind speed in October: 4.2mph

The windiest month (with the highest average wind speed) is March (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).

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Average humidity in October
Summit, WA

Average humidity in October - Summit, WA
  • Average humidity in October: 80%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is July (69%).

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Average rainfall in October
Summit, WA

Average rainfall in October - Summit, WA
  • Average rainfall in October: 3.74"

The wettest month (with the highest rainfall) is December (4.92").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in October
Summit, WA

Average rainfall days in October - Summit, WA
  • Average rainfall days in October: 16.2 days

The month with the highest number of rainy days is March (21 days).
The month with the least rainy days is August (6.2 days).

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Average snowfall in October
Summit, WA

Average snowfall in October - Summit, WA
  • Average snowfall in October: 0"

The month with the highest snowfall is February (1.42").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in October
Summit, WA

Average snowfall days in October - Summit, WA
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is February (2.7 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in October /
Average sunshine in October
Summit, WA

Average daylight in October / Average sunshine in October - Summit, WA
  • Average daylight in October: 10.8h

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in October: 5.5h

The month with the most sunshine is August (Average sunshine: 10.9h).
The month with the least sunshine is December (Average sunshine: 4.2h).

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Average sunshine days in October
Summit, WA

Average sunshine days in October - Summit, WA
  • Average sunshine days in October: 13.4 days

The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is February (8.2 days).

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Average UV index in October
Summit, WA

Average UV index in October - Summit, WA
  • Average UV index in October: 2

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average cloud cover in October
Summit, WA

Average cloud cover in October - Summit, WA
  • Average cloud cover in October: 44

Months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).

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Average visibility in October
Summit, WA

Average visibility in October - Summit, WA
  • Average visibility in October: 5mi

Months with the highest visibility are July and August (6mi).
Months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (5mi).

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