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 January unfolds, the average high-temperature reaches a frosty 44.2°F (6.8°C), hinting at a slight fluctuation from the previous month. The average temperature during January nights in Heisson is registered at a wintry 33.8°F (1°C).Humidity
In Heisson, Washington, the average relative humidity in January is 84%.Rainfall
The month with the most rainfall is January, when the rain falls for 18.8 days and typically aggregates up to 6.06" (154mm) of precipitation.Snowfall
Months with snowfall in Heisson, Washington, are January through March, November and December. In Heisson, Washington, in January, snow falls for 1.7 days, with typically accumulated 2.05" (52mm) of snow. In Heisson, during the entire year, snow falls for 9.8 days and aggregates up to 7.4" (188mm) of snow.Daylight
In Heisson, Washington, the average length of the day in January is 9h and 10min.On the first day of January, sunrise is at 7:51 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:13 pm PST.
Sunshine
The months with the least sunshine are January and February, with an average of 3.8h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Heisson. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In January, the average maximum UV index of 2 translates into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
How cold is it in Heisson in January?
What is the average humidity in January in Heisson?
What is the rainiest month in Heisson?
How many days does it rain in January in Heisson?
How many days does it snow in January in Heisson?
What is the average length of the day in January in Heisson?
When is the sunrise / sunset in January in Heisson?
What is the month with the least sunshine in Heisson?
How many hours of sunshine does Heisson have in January?
When is the lowest UV index in Heisson?
What is the UV index reading in January in Heisson?
Average temperature in January
Heisson, WA
- Average high temperature in January: 44.2°F
The warmest month (with the highest average high temperature) is August (79.3°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in January: 33.8°F
The month with the highest average low temperature is August (52°F).
The coldest month (with the lowest average low temperature) is December (32.7°F).
Average pressure in January
Heisson, WA
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in January
Heisson, WA
- Average wind speed in January: 6.1mph
The windiest month (with the highest average wind speed) is January (6.1mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in January
Heisson, WA
- Average humidity in January: 84%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is August (67%).
Average rainfall in January
Heisson, WA
- Average rainfall in January: 6.06"
The wettest month (with the highest rainfall) is January (6.06").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in January
Heisson, WA
- Average rainfall days in January: 18.8 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in January
Heisson, WA
- Average snowfall in January: 2.05"
The month with the highest snowfall is February (2.76").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Heisson, WA
- Average snowfall days in January: 1.7 days
The month with the highest number of snowfall days is February (3.7 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
Heisson, WA
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are January and February (Average sunshine: 3h and 48min).
Average sunshine days in January
Heisson, WA
- Average sunshine days in January: 10.4 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in January
Heisson, WA
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Heisson, WA
- Average cloud cover in January: 60
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in January
Heisson, WA
- Average visibility in January: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Heisson, Washington, USA
Weather forecast for your location
2. Allow the app to use your location
