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
January ushers in an average high-temperature of a still icy 38.1°F (3.4°C), aligning closely with the preceding month. Petersburg records a consistent low-temperature of 28.2°F (-2.1°C) during January nights.Humidity
January and December, with an average relative humidity of 85%, are the most humid months.Rainfall
January is the month with the most rainfall. Rain falls for 16.2 days and accumulates 2.99" (76mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In January, in Petersburg, it is snowing for 3.5 days. Throughout January, 2.68" (68mm) of snow is accumulated. In Petersburg, during the entire year, snow falls for 14.3 days and aggregates up to 11.06" (281mm) of snow.Daylight
In Petersburg, the average length of the day in January is 9h and 11min.On the first day of the month, sunrise is at 7:44 am and sunset at 4:30 pm. On the last day of January, sunrise is at 7:26 am and sunset at 5:08 pm PST.
Sunshine
January has the least sunshine of the year, with an average of 4.8h of sunshine.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 unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 2 during January translates into these guidelines:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Minimize direct exposure to the Sun during midday when its radiation is at its peak. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the most humid month?
What is the average humidity in January?
What is the rainiest month?
How much does it rain in January?
How many days does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Petersburg have in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Petersburg, OR
- Average high temperature in January: 38.1°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (37°F).
- Average low temperature in January: 28.2°F
The month with the highest average low temperature is August (55.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).
Average pressure in January
Petersburg, OR
- 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 (29.96"Hg).
Average wind speed in January
Petersburg, OR
- Average wind speed in January: 4.8mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).
Average humidity in January
Petersburg, OR
- Average humidity in January: 85%
The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall in January
Petersburg, OR
- Average rainfall in January: 2.99"
The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in January
Petersburg, OR
- Average rainfall days in January: 16.2 days
The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (3.2 days).
Average snowfall in January
Petersburg, OR
- Average snowfall in January: 2.68"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Petersburg, OR
- Average snowfall days in January: 3.5 days
The month with the highest number of snowfall days is December (4.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Petersburg, OR
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January: 4h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in January
Petersburg, OR
- Average sunshine days in January: 11.6 days
The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (10.6 days).
Average UV index in January
Petersburg, OR
- 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
Petersburg, OR
- Average cloud cover in January: 52
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in January
Petersburg, OR
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Petersburg, Oregon, USA
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