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 sea temperature 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
Welcoming January, Petersburg notes an average high-temperature of a still cold 32.7°F (0.4°C), nearly consistent with December's 32.4°F (0.2°C). Petersburg registers a small shift from peak daytime temperatures, with a consistent average low-temperature of 27.3°F (-2.6°C) during January.Humidity
The months with the highest humidity are January and August, with an average relative humidity of 86%.Rainfall
In Petersburg, in January, it is raining for 15.8 days, with typically 6.02" (153mm) of accumulated precipitation. In Petersburg, during the entire year, the rain falls for 197.9 days and collects up to 53.03" (1347mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Petersburg, in January, during 8.6 snowfall days, 11.73" (298mm) of snow is typically accumulated. Throughout the year, there are 47.5 snowfall days, and 58.23" (1479mm) of snow is accumulated.Ocean temperature
In Petersburg, the average seawater temperature in January is 41.7°F (5.4°C).Note: It is life-risking to swim in 41.7°F (5.4°C). Briefly staying in 55.4°F (13°C) waters feels unsettling, and temperatures below 50°F (10°C) might result in cold shock and loss of breath control, hinging on personal endurance.
Daylight
The average length of the day in January is 7h and 35min.On the first day of January, sunrise is at 8:28 am and sunset at 3:22 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 4:18 pm AKST.
Sunshine
The months with the least sunshine are January and November, with an average of 3.4h of sunshine.UV index
The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: The daily maximum UV index of 2 in January interprets into the following advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in January?
What is the most humid month?
What is the average humidity in January?
How much does it rain in January?
How many days does it snow in January?
How cold is the water in January?
How many hours of daylight does Petersburg have in January?
What time are sunrise and sunset in January?
What are the months with the least sunshine?
How many hours of sunshine does Petersburg have in January?
How high is the UV index in January?
Average temperature in January
Petersburg, AK
- Average high temperature in January: 32.7°F
The warmest month (with the highest average high temperature) is July (59.7°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in January: 27.3°F
The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).
Average pressure in January
Petersburg, AK
- Average pressure in January: 29.85"Hg
The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
Average wind speed in January
Petersburg, AK
- Average wind speed in January: 8.2mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is July (3.9mph).
Average humidity in January
Petersburg, AK
- Average humidity in January: 86%
The months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).
Average rainfall in January
Petersburg, AK
- Average rainfall in January: 6.02"
The wettest month (with the highest rainfall) is October (6.3").
The driest month (with the least rainfall) is May (2.01").
Average rainfall days in January
Petersburg, AK
- Average rainfall days in January: 15.8 days
The month with the highest number of rainy days is October (20.1 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in January
Petersburg, AK
- Average snowfall in January: 11.73"
The month with the highest snowfall is March (13.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Petersburg, AK
- Average snowfall days in January: 8.6 days
The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in January
Petersburg, AK
- Average sea temperature in January: 41.8°F
The best month for swimming (with the highest average sea temperature) is August (54.2°F).
The coldest month (with the lowest average sea temperature) is March (41°F).
Average daylight in January /
Average sunshine in January
Petersburg, AK
- Average daylight in January: 7h and 4min
The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in January: 3h and 2min
The month with the most sunshine is May (Average sunshine: 7h and 24min).
The months with the least sunshine are January and November (Average sunshine: 3h and 24min).
Average sunshine days in January
Petersburg, AK
- Average sunshine days in January: 10.5 days
The month with the most sunshine days is December (12.5 days).
The month with the least sunshine days is November (8 days).
Average UV index in January
Petersburg, AK
- Average UV index in January: 2
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in January
Petersburg, AK
- 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 February and May (Cloud cover 54).
Average visibility in January
Petersburg, AK
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Petersburg, Alaska, USA
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