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
As December transitions into January, Ahtanum records an average high-temperature of a still wintry 37.6°F (3.1°C), showing a gentle shift from the preceding month. The nighttime temperature, during January, averages of 26.6°F (-3°C).Humidity
The most humid month is January, with an average relative humidity of 81%.Rainfall
January is the month with the most rainfall. Rain falls for 10.3 days and accumulates 0.87" (22mm) of precipitation.Snowfall
January through March, September, November and December are months with snowfall. In Ahtanum, in January, snow falls for 4.5 days, with typically accumulated 2.05" (52mm) of snow. In Ahtanum, during the entire year, snow falls for 18.5 days and aggregates up to 7.8" (198mm) of snow.Daylight
The average length of the day in January is 9h and 5min.On the first day of January, sunrise is at 7:46 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 5:04 pm PST.
Sunshine
The month with the least sunshine is January, with an average of 5.6h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 2 in January leads to these recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Boost your sun resistance with garments that are densely woven yet spacious. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the most humid month?
What is the average humidity in January?
What is the wettest month?
How many days does it rain in January?
How many days does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Ahtanum have in January?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Ahtanum, WA
- Average high temperature in January: 37.6°F
The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (36.9°F).
- Average low temperature in January: 26.6°F
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is December (25.5°F).
Average pressure in January
Ahtanum, WA
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in January
Ahtanum, WA
- Average wind speed in January: 4.5mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is December (4.4mph).
Average humidity in January
Ahtanum, WA
- Average humidity in January: 81%
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (39%).
Average rainfall in January
Ahtanum, WA
- Average rainfall in January: 0.87"
The wettest month (with the highest rainfall) is January (0.87").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in January
Ahtanum, WA
- Average rainfall days in January: 10.3 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is August (2 days).
Average snowfall in January
Ahtanum, WA
- Average snowfall in January: 2.05"
The month with the highest snowfall is December (2.76").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in January
Ahtanum, WA
- Average snowfall days in January: 4.5 days
The month with the highest number of snowfall days is December (5.4 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in January /
Average sunshine in January
Ahtanum, WA
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in January: 5h and 4min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in January
Ahtanum, WA
- Average sunshine days in January: 17 days
The month with the most sunshine days is July (27.5 days).
The month with the least sunshine days is February (15.8 days).
Average UV index in January
Ahtanum, WA
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Ahtanum, WA
- Average cloud cover in January: 40
The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in January
Ahtanum, WA
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Ahtanum, Washington, USA
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