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, with its average high-temperature of 37.6°F (3.1°C) and an average low-temperature of 25°F (-3.9°C), holds the record as the coldest month.Humidity
January, April, July and November, with an average relative humidity of 75%, are the least humid months.Rainfall
In Johnsville, in January, during 6.8 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. In Johnsville, during the entire year, the rain falls for 130.3 days and collects up to 15.47" (393mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. January is the month with the most snowfall. Snow falls for 4.4 days and accumulates 1.34" (34mm) of snow.Daylight
The average length of the day in January is 9h and 46min.On the first day of January in Johnsville, sunrise is at 7:29 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 5:27 pm EST.
Sunshine
In Johnsville, the average sunshine in January is 4.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In January, the maximum UV index of 2 translates into these guidelines:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
How cold is January?
What are the least humid months?
What is the average humidity in January in Johnsville?
How many days does it rain in January?
When does it snow the most?
How many days does it snow in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How long on average sun shines in January?
What is the month with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Johnsville, MD
- Average high temperature in January: 37.6°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in January: 25°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in January
Johnsville, 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
Johnsville, MD
- Average wind speed in January: 8.6mph
The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in January
Johnsville, MD
- Average humidity in January: 75%
The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January, April, July and November (75%).
Average rainfall in January
Johnsville, MD
- Average rainfall in January: 0.83"
The wettest month (with the highest rainfall) is August (2.48").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in January
Johnsville, MD
- Average rainfall days in January: 6.8 days
The month with the highest number of rainy days is August (15.1 days).
The months with the least rainy days are January and February (6.8 days).
Average snowfall in January
Johnsville, MD
- Average snowfall in January: 1.34"
The month with the highest snowfall is January (1.34").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Johnsville, MD
- Average snowfall days in January: 4.4 days
The month with the highest number of snowfall days is February (4.9 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
Johnsville, 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 24min).
- Average sunshine in January: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in January
Johnsville, MD
- Average sunshine days in January: 19.3 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in January
Johnsville, 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, February, November and December (UV index 2).
Average cloud cover in January
Johnsville, MD
- Average cloud cover in January: 47
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in January
Johnsville, MD
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Johnsville, Maryland, USA
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