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 is the coldest month, exhibiting average temperatures of 39.6°F (4.2°C) at the peak and 28.4°F (-2°C) at the base.Humidity
The months with the lowest humidity in Chartwood are January, March, April and November, with an average relative humidity of 72%.Rainfall
In Chartwood, Maryland, in January, during 9.9 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the year, there are 155.7 rainfall days, and 31.22" (793mm) of precipitation is accumulated.Snowfall
Months with snowfall in Chartwood are January through April, November and December. The month with the most snowfall is January, when snow falls for 4.4 days and typically aggregates up to 2.05" (52mm) of snow.Daylight
The average length of the day in January is 9h and 47min.On the first day of the month, sunrise is at 7:25 am and sunset at 4:54 pm. On the last day of January, in Chartwood, Maryland, sunrise is at 7:13 am and sunset at 5:25 pm EST.
Sunshine
In Chartwood, the average sunshine in January is 5.3h.UV index
The months with the lowest UV index in Chartwood are January, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 2 in January translates into this advice:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Enhance your sun protection with tightly woven, yet airy clothing. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
Is January cold?
What are the least humid months?
What is the average humidity in January?
How much does it rain in January?
What is the snowiest month in Chartwood?
How much does it snow in January?
How many hours of daylight does Chartwood have in January?
When is the sunrise / sunset in January in Chartwood?
How many hours of sunshine does Chartwood have in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Chartwood, MD
- Average high temperature in January: 39.6°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 (39.6°F).
- Average low temperature in January: 28.4°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in January
Chartwood, MD
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Chartwood, MD
- Average wind speed in January: 9.3mph
The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in January
Chartwood, MD
- Average humidity in January: 72%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).
Average rainfall in January
Chartwood, MD
- Average rainfall in January: 2.01"
The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in January
Chartwood, MD
- Average rainfall days in January: 9.9 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in January
Chartwood, MD
- Average snowfall in January: 2.05"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Chartwood, MD
- Average snowfall days in January: 4.4 days
The month with the highest number of snowfall days is January (4.4 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
Chartwood, MD
- Average daylight in January: 9h and 5min
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 30min).
- Average sunshine in January: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in January
Chartwood, MD
- Average sunshine days in January: 17.5 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in January
Chartwood, MD
- 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, November and December (UV index 2).
Average cloud cover in January
Chartwood, MD
- Average cloud cover in January: 43
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in January
Chartwood, MD
- 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).
Chartwood, Maryland, USA
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