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
Saint Helens measures an average high-temperature of a frosty 43.9°F (6.6°C) in January, nearly consistent with the preceding month. In January, Saint Helens experiences an average nighttime temperature of 32.9°F (0.5°C).Humidity
In Saint Helens, the average relative humidity in January is 87%.Rainfall
January is the month with the most rainfall. Rain falls for 14.5 days and accumulates 2.64" (67mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. January is the month with the most snowfall. Snow falls for 2.1 days and accumulates 1.97" (50mm) of snow.Daylight
In Saint Helens, the average length of the day in January is 9h and 9min.On the first day of January, sunrise is at 7:52 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 5:14 pm PST.
Sunshine
January, February and December, with an average of 3.7h of sunshine, are months with the least sunshine.UV index
In January, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.Note: A daily maximum UV index of 2 in January translates into the following instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in January?
What is the average humidity in January?
What is the wettest month?
How much does it rain in January?
When does it snow the most?
How much does it snow in Saint Helens in January?
How many hours of daylight does Saint Helens have in January?
When is the sunrise / sunset in January?
What are the months with the least sunshine?
How many hours of sunshine does Saint Helens have in January?
How high is the UV index in January?
Average temperature in January
Saint Helens, OR
- Average high temperature in January: 43.9°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (41.9°F).
- Average low temperature in January: 32.9°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (31.8°F).
Average pressure in January
Saint Helens, OR
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in January
Saint Helens, OR
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in January
Saint Helens, OR
- Average humidity in January: 87%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are July and August (72%).
Average rainfall in January
Saint Helens, OR
- Average rainfall in January: 2.64"
The wettest month (with the highest rainfall) is January (2.64").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in January
Saint Helens, OR
- Average rainfall days in January: 14.5 days
The month with the highest number of rainy days is March (16 days).
The month with the least rainy days is July (5.9 days).
Average snowfall in January
Saint Helens, OR
- Average snowfall in January: 1.97"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Saint Helens, OR
- Average snowfall days in January: 2.1 days
The month with the highest number of snowfall days is February (3.6 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
Saint Helens, OR
- 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 42min).
Average sunshine days in January
Saint Helens, OR
- Average sunshine days in January: 14.4 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is February (12.1 days).
Average UV index in January
Saint Helens, OR
- Average UV index in January: 2
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in January
Saint Helens, OR
- Average cloud cover in January: 61
The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in January
Saint Helens, OR
- Average visibility in January: 4mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
Saint Helens, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location