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
Sumas's average high-temperature in January is a still wintry 41.2°F (5.1°C), indicating a subtle variation from December. In Sumas, January nights maintain a consistent temperature, with an average low of 32.9°F (0.5°C).Humidity
The most humid month in Sumas is January, with an average relative humidity of 87%.Rainfall
In Sumas, in January, it is raining for 18.2 days, with typically 7.01" (178mm) of accumulated precipitation. In Sumas, Washington, during the entire year, the rain falls for 188 days and collects up to 49.88" (1267mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In January, in Sumas, it is snowing for 2.9 days. Throughout January, 2.64" (67mm) of snow is accumulated. Throughout the year, there are 14.7 snowfall days, and 10.2" (259mm) of snow is accumulated.Daylight
In Sumas, Washington, the average length of the day in January is 8h and 47min.On the first day of the month, sunrise is at 8:02 am and sunset at 4:22 pm. On the last day of January, sunrise is at 7:40 am and sunset at 5:04 pm PST.
Sunshine
In Sumas, the average sunshine in January is 3.9h.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Sumas, Washington. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 during January translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
Is January cold in Sumas?
What is the most humid month in Sumas?
What is the average humidity in January in Sumas?
How many days does it rain in January in Sumas?
How many days does it snow in January in Sumas?
What is the average length of the day in January in Sumas?
When is the sunrise / sunset in January in Sumas?
How long on average sun shines in January in Sumas?
What is the month with the lowest UV index in Sumas?
What is the UV index reading in January in Sumas?
Average temperature in January
Sumas, WA
- Average high temperature in January: 41.2°F
The warmest month (with the highest average high temperature) is August (73.6°F).
The month with the lowest average high temperature is December (39.6°F).
- Average low temperature in January: 32.9°F
The month with the highest average low temperature is August (51.4°F).
The coldest months (with the lowest average low temperature) are February and December (31.6°F).
Average pressure in January
Sumas, 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 and August (30"Hg).
Average wind speed in January
Sumas, WA
- Average wind speed in January: 4.7mph
The windiest months (with the highest average wind speed) are January and February (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in January
Sumas, 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 (73%).
Average rainfall in January
Sumas, WA
- Average rainfall in January: 7.01"
The wettest month (with the highest rainfall) is November (7.72").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in January
Sumas, WA
- Average rainfall days in January: 18.2 days
The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (7.8 days).
Average snowfall in January
Sumas, WA
- Average snowfall in January: 2.64"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Sumas, WA
- Average snowfall days in January: 2.9 days
The month with the highest number of snowfall days is February (4.7 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
Sumas, WA
- Average daylight in January: 8h and 5min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in January
Sumas, WA
- Average sunshine days in January: 11 days
The months with the most sunshine days are July and August (21 days).
The month with the least sunshine days is March (8.4 days).
Average UV index in January
Sumas, 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
Sumas, WA
- Average cloud cover in January: 59
The month with the most cloud cover is March (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in January
Sumas, WA
- Average visibility in January: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
Sumas, Washington, USA
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