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 registers at a chilly 44.8°F (7.1°C), subtly different from December's 42.6°F (5.9°C). Grand Mound records a consistent low-temperature of 34.2°F (1.2°C) during January nights.Humidity
In January, the average relative humidity is 89%.Rainfall
January is the month with the most rainfall. Rain falls for 17.8 days and accumulates 3.86" (98mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Grand Mound, during January, snow falls for 1.8 days and regularly aggregates up to 1.22" (31mm) of snow. Throughout the year, there are 7.9 snowfall days, and 4.02" (102mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 3min.On the first day of the month, sunrise is at 7:56 am and sunset at 4:34 pm. On the last day of January, sunrise is at 7:37 am and sunset at 5:13 pm PST.
Sunshine
In Grand Mound, the average sunshine in January is 3.6h.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 reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In January, the maximum UV index of 2 translates into these guidelines:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in January?
What is the average humidity in January?
What is the wettest month?
How many days does it rain in January?
How much does it snow in January?
How many hours of daylight does Grand Mound have in January?
What time are sunrise and sunset in January in Grand Mound?
How long on average sun shines in January?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Grand Mound, WA
- Average high temperature in January: 44.8°F
The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in January: 34.2°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure in January
Grand Mound, WA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.02"Hg).
Average wind speed in January
Grand Mound, WA
- Average wind speed in January: 4.5mph
The windiest months (with the highest average wind speed) are January, March and November (4.5mph).
The calmest month (with the lowest average wind speed) is September (3.6mph).
Average humidity in January
Grand Mound, WA
- Average humidity in January: 89%
The month with the highest relative humidity is November (90%).
The month with the lowest relative humidity is July (73%).
Average rainfall in January
Grand Mound, WA
- Average rainfall in January: 3.86"
The wettest month (with the highest rainfall) is January (3.86").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in January
Grand Mound, WA
- Average rainfall days in January: 17.8 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (5.6 days).
Average snowfall in January
Grand Mound, WA
- Average snowfall in January: 1.22"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Grand Mound, 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
Grand Mound, WA
- Average daylight in January: 9h and 0min
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: 3h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in January
Grand Mound, WA
- Average sunshine days in January: 10.7 days
The month with the most sunshine days is August (20.9 days).
The months with the least sunshine days are February and March (9.3 days).
Average UV index in January
Grand Mound, WA
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Grand Mound, WA
- Average cloud cover in January: 66
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in January
Grand Mound, WA
- Average visibility in January: 4mi
The month with the highest visibility is July (5mi).
The months with the lowest visibility are January, February, March, April, May, June, August, September, October, November and December (4mi).
Grand Mound, Washington, USA
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