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 proves to be the coldest month, recording an average maximum temperature of 36.7°F (2.6°C) and a minimum temperature of 24.6°F (-4.1°C).Humidity
The average relative humidity in January is 75%.Rainfall
In Roslyn, in January, during 6.6 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, there are 122.4 rainfall days, and 12.68" (322mm) of precipitation is accumulated.Snowfall
Months with snowfall in Roslyn are January through April, November and December. In January, it is snowing for 5.1 days. Throughout January, 1.18" (30mm) of snow is accumulated. Throughout the year, there are 16.3 snowfall days, and 4.72" (120mm) of snow is accumulated.Daylight
In Roslyn, Pennsylvania, the average length of the day in January is 9h and 42min.On the first day of the month, sunrise is at 7:22 am and sunset at 4:45 pm. On the last day of January, in Roslyn, sunrise is at 7:10 am and sunset at 5:17 pm EST.
Sunshine
The average sunshine in January is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Roslyn. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 2 during January leads to these advisories:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
What time of the year is the coldest in Roslyn?
How cold is January in Roslyn?
What is the average humidity in January in Roslyn?
How many days does it rain in January in Roslyn?
How many days does it snow in January in Roslyn?
What is the average length of the day in January in Roslyn?
When is the sunrise / sunset in January in Roslyn?
How long on average sun shines in January in Roslyn?
What are the months with the lowest UV index in Roslyn?
What is the UV index intensity in January in Roslyn?
Average temperature in January
Roslyn, PA
- Average high temperature in January: 36.7°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in January: 24.6°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in January
Roslyn, PA
- Average pressure in January: 30.08"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Roslyn, PA
- Average wind speed in January: 8mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in January
Roslyn, PA
- Average humidity in January: 75%
The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April, July and August (72%).
Average rainfall in January
Roslyn, PA
- Average rainfall in January: 0.83"
The wettest month (with the highest rainfall) is August (1.54").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in January
Roslyn, PA
- Average rainfall days in January: 6.6 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is November (6.4 days).
Average snowfall in January
Roslyn, PA
- Average snowfall in January: 1.18"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Roslyn, PA
- Average snowfall days in January: 5.1 days
The month with the highest number of snowfall days is January (5.1 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
Roslyn, PA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in January
Roslyn, PA
- Average sunshine days in January: 21.1 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (14.4 days).
Average UV index in January
Roslyn, PA
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Roslyn, PA
- Average cloud cover in January: 45
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in January
Roslyn, PA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Roslyn, Pennsylvania, USA
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