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
The month of January, characterized by an average high of 39.2°F (4°C) and a low of 27.9°F (-2.3°C), is recognized as the coldest.Humidity
The average relative humidity in January is 74%.Rainfall
The month with the least rainfall is January, when the rain falls for 9.7 days and typically collects 2.13" (54mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Hartly, in January, during 4.5 snowfall days, 2.09" (53mm) of snow is typically accumulated. In Hartly, during the entire year, snow falls for 14.4 days and aggregates up to 7.44" (189mm) of snow.Daylight
In Hartly, the average length of the day in January is 9h and 47min.On the first day of January in Hartly, sunrise is at 7:22 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:21 pm EST.
Sunshine
In Hartly, Delaware, the average sunshine in January is 5.3h.UV index
The months with the lowest UV index in Hartly are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 2 during January morphs into the following directions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Avoiding the Sun during its peak radiation time around midday is a healthy practice. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What is the coldest time of year in Hartly?
How cold does it get in Hartly in January?
What is the average humidity in January in Hartly?
What is the driest month in Hartly?
How many days does it rain in January in Hartly?
How much does it snow in Hartly in January?
How many hours of daylight does Hartly have in January?
What time are sunrise and sunset in January in Hartly?
How long on average sun shines in January in Hartly?
When is the lowest UV index in Hartly?
What is the UV index intensity in January in Hartly?
Average temperature in January
Hartly, DE
- Average high temperature in January: 39.2°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 (39.2°F).
- Average low temperature in January: 27.9°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure in January
Hartly, DE
- 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
Hartly, DE
- Average wind speed in January: 9.4mph
The windiest months (with the highest average wind speed) are February and March (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in January
Hartly, DE
- Average humidity in January: 74%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in January
Hartly, DE
- Average rainfall in January: 2.13"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (2.13").
Average rainfall days in January
Hartly, DE
- Average rainfall days in January: 9.7 days
The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in January
Hartly, DE
- Average snowfall in January: 2.09"
The month with the highest snowfall is March (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Hartly, DE
- Average snowfall days in January: 4.5 days
The month with the highest number of snowfall days is January (4.5 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
Hartly, DE
- 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 42min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in January
Hartly, DE
- Average sunshine days in January: 17.2 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in January
Hartly, DE
- 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 and December (UV index 2).
Average cloud cover in January
Hartly, DE
- 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 29).
Average visibility in January
Hartly, DE
- 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).
Hartly, Delaware, USA
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