Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
With the onset of January, the average high-temperature stands at a still chilly 44.4°F (6.9°C), closely aligned with December's 42.8°F (6°C). Throughout January, the temperature in Summit, Washington, falls to an average low of 33.8°F (1°C).Humidity
With an average relative humidity of 87%, January is the most humid month in Summit, Washington.Rainfall
In Summit, in January, during 18.6 rainfall days, 4.8" (122mm) of precipitation is typically accumulated. In Summit, during the entire year, the rain falls for 183.4 days and collects up to 32.48" (825mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Summit, during January, snow falls for 1.8 days and regularly aggregates up to 0.98" (25mm) of snow. In Summit, during the entire year, snow falls for 7.4 days and aggregates up to 3.78" (96mm) of snow.Daylight
In Summit, Washington, the average length of the day in January is 9h and 1min.On the first day of January in Summit, sunrise is at 7:55 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 5:09 pm PST.
Sunshine
In Summit, the average sunshine in January is 4.3h.UV index
The months with the lowest UV index in Summit, Washington, are January, February, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: In January, the maximum UV index of 2 translates into these guidelines:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Summit in January?
What is the most humid month in Summit?
What is the average humidity in January in Summit?
How many days does it rain in January in Summit?
How many days does it snow in January in Summit?
What is the average length of the day in January in Summit?
When are sunrise and sunset in January in Summit?
How long on average sun shines in January in Summit?
What is the month with the lowest UV index in Summit?
What is the UV index reading in January in Summit?
Average temperature in January
Summit, WA
- Average high temperature in January: 44.4°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 January: 33.8°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).
Average pressure in January
Summit, WA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in January
Summit, WA
- Average wind speed in January: 4.8mph
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).
Average humidity in January
Summit, WA
- Average humidity in January: 87%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is July (69%).
Average rainfall in January
Summit, WA
- Average rainfall in January: 4.8"
The wettest month (with the highest rainfall) is December (4.92").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in January
Summit, WA
- Average rainfall days in January: 18.6 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).
Average snowfall in January
Summit, WA
- Average snowfall in January: 0.98"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Summit, WA
- Average snowfall days in January: 1.8 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Summit, WA
- Average daylight in January: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in January
Summit, WA
- Average sunshine days in January: 10.7 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).
Average UV index in January
Summit, WA
- Average UV index in January: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in January
Summit, WA
- Average cloud cover in January: 56
The 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).
Average visibility in January
Summit, WA
- Average visibility in January: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (5mi).
Summit, Washington, USA
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