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
Rosslyn Farms's January weather, with an average high temperature of 33.4°F (0.8°C) and an average low temperature of 21°F (-6.1°C), tends to be the coldest of the year.Humidity
The average relative humidity in January is 84%.Rainfall
In Rosslyn Farms, during January, the rain falls for 7.3 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 132.6 rainfall days, and 11.5" (292mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Rosslyn Farms. In January, it is snowing for 9.3 days. Throughout January, 0.83" (21mm) of snow is accumulated. Throughout the year, there are 32.5 snowfall days, and 3.66" (93mm) of snow is accumulated.Daylight
The average length of the day in January in Rosslyn Farms is 9h and 41min.On the first day of the month, sunrise is at 7:43 am and sunset at 5:04 pm. On the last day of January, sunrise is at 7:30 am and sunset at 5:36 pm EST.
Sunshine
January has the least sunshine of the year, with an average of 3h of sunshine.UV index
In January, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What time of the year is the coldest in Rosslyn Farms?
How cold is it in Rosslyn Farms in January?
What is the average humidity in January in Rosslyn Farms?
How many days does it rain in January in Rosslyn Farms?
How many days does it snow in January in Rosslyn Farms?
How many hours of daylight does Rosslyn Farms have in January?
What time are sunrise and sunset in January in Rosslyn Farms?
What is the month with the least sunshine in Rosslyn Farms?
How long on average sun shines in January in Rosslyn Farms?
What is the UV index reading in January in Rosslyn Farms?
Average temperature in January
Rosslyn Farms, PA
- Average high temperature in January: 33.4°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in January: 21°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in January
Rosslyn Farms, PA
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in January
Rosslyn Farms, PA
- Average wind speed in January: 7.9mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in January
Rosslyn Farms, PA
- Average humidity in January: 84%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are July and August (75%).
Average rainfall in January
Rosslyn Farms, PA
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is November (0.67").
Average rainfall days in January
Rosslyn Farms, PA
- Average rainfall days in January: 7.3 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in January
Rosslyn Farms, PA
- Average snowfall in January: 0.83"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Rosslyn Farms, PA
- Average snowfall days in January: 9.3 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Rosslyn Farms, 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 18min).
- Average sunshine in January: 3h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in January
Rosslyn Farms, PA
- Average sunshine days in January: 17.6 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.2 days).
Average UV index in January
Rosslyn Farms, PA
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Rosslyn Farms, PA
- Average cloud cover in January: 68
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in January
Rosslyn Farms, PA
- Average visibility in January: 5mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Rosslyn Farms, Pennsylvania, USA
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