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
The shift into January records an average high-temperature of a still cold 37.6°F (3.1°C), subtly varied from December's 36.9°F (2.7°C). An average low-temperature of 26.6°F (-3°C) is recorded in the month of January in Terrace Heights.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
Months with snowfall are January through March, September, November and December. In January, it is snowing for 4.5 days. Throughout January, 2.05" (52mm) of snow is accumulated. Throughout the year, there are 18.5 snowfall days, and 7.8" (198mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 4min.On the first day of January, sunrise is at 7:45 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 5:03 pm PST.
Sunshine
January has the least sunshine of the year in Terrace Heights, with an average of 5.6h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In January, a regular UV index of 2 translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is January cold?
What is the most humid month?
What is the average humidity in January?
What is the wettest month in Terrace Heights?
How much does it rain in January?
How much does it snow in January?
How many hours of daylight does Terrace Heights have in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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
Terrace Heights, 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).
Terrace Heights, Washington, USA
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