January weather forecastMarcus Hook, PA
January
Weather in January
January, the same as December, is an icy winter month in Marcus Hook, Pennsylvania, with an average temperature varying between 25.7°F (-3.5°C) and 37.4°F (3°C).Temperature
January is the month when Marcus Hook sees the lowest average temperatures, with a high of 37.4°F (3°C) and a low of 25.7°F (-3.5°C).Humidity
In Marcus Hook, the average relative humidity in January is 74%.Rainfall
January is the month with the least rainfall. Rain falls for 7.1 days and accumulates 1.61" (41mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. In Marcus Hook, in January, snow falls for 3.5 days, with typically accumulated 1.73" (44mm) of snow. In Marcus Hook, during the entire year, snow falls for 12.6 days and aggregates up to 7.28" (185mm) of snow.Ocean temperature
In January, the average ocean temperature is 41.9°F (5.5°C).Note: Swimming at temperatures less than 50°F (10°C) in 41.9°F (5.5°C) is feasible with the right swimsuit; if not, expect cold shock and breathlessness. A quick swim at 55.4°F (13°C) without adequate warmth can be discomforting.
Daylight
In Marcus Hook, the average length of the day in January is 9h and 44min.On the first day of January, sunrise is at 7:22 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:19 pm EST.
Sunshine
The average sunshine in January is 5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Marcus Hook. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 2 in January transforms into the following instructions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Marcus Hook, PA
- Average high temperature in January: 37.4°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in January: 25.7°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in January
Marcus Hook, PA
- Average pressure in January: 30.09"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
Marcus Hook, PA
- Average wind speed in January: 8.4mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in January
Marcus Hook, PA
- Average humidity in January: 74%
The months with the highest relative humidity are February, October and December (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall in January
Marcus Hook, PA
- Average rainfall in January: 1.61"
The wettest month (with the highest rainfall) is August (3.11").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days in January
Marcus Hook, PA
- Average rainfall days in January: 7.1 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in January
Marcus Hook, PA
- Average snowfall in January: 1.73"
The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Marcus Hook, PA
- Average snowfall days in January: 3.5 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in January
Marcus Hook, PA
- Average sea temperature in January: 41.8°F
The best month for swimming (with the highest average sea temperature) is August (75.9°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).
Average daylight in January /
Average sunshine in January
Marcus Hook, PA
- Average daylight in January: 9h and 42min
The month with the longest days is June (Average daylight: 14h and 54min).
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 54min).
Average sunshine days in January
Marcus Hook, PA
- Average sunshine days in January: 20.8 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in January
Marcus Hook, 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, November and December (UV index 2).
Average cloud cover in January
Marcus Hook, PA
- Average cloud cover in January: 44
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in January
Marcus Hook, PA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
