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 sea temperature 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 high-temperature average of 41.2°F (5.1°C) and a low-temperature average of 32°F (0°C), is the coldest month.Humidity
In January, the average relative humidity is 74%.Rainfall
The month with the least rainfall is January, when the rain falls for 9.6 days and typically collects 2.2" (56mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. January is the month with the most snowfall in Lewes. Snow falls for 3.7 days and accumulates 0.98" (25mm) of snow.Ocean temperature
In Lewes, the average seawater temperature in January is 42.4°F (5.8°C).Note: It is risky to swim in 42.4°F (5.8°C). Temperatures beneath 50°F (10°C) induce rapid cold shock and hyperventilation.
Daylight
The average length of the day in January is 9h and 49min.On the first day of January, sunrise is at 7:18 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:20 pm EST.
Sunshine
In January, the average sunshine is 5.5h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 2 in January translates into this advice:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is it in January?
What is the average humidity in January?
What is the driest month?
How much does it rain in January?
When does it snow the most?
How many days does it snow in January?
What is the water temperature in January?
What is the average length of the day in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Lewes have in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Lewes, DE
- Average high temperature in January: 41.2°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in January: 32°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (32°F).
Average pressure in January
Lewes, 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
Lewes, DE
- Average wind speed in January: 12.5mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in January
Lewes, DE
- Average humidity in January: 74%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is November (73%).
Average rainfall in January
Lewes, DE
- Average rainfall in January: 2.2"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days in January
Lewes, DE
- Average rainfall days in January: 9.6 days
The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is January (9.6 days).
Average snowfall in January
Lewes, DE
- Average snowfall in January: 0.98"
The month with the highest snowfall is January (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Lewes, DE
- Average snowfall days in January: 3.7 days
The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in January
Lewes, DE
- Average sea temperature in January: 42.4°F
The best month for swimming (with the highest average sea temperature) is August (76.9°F).
The coldest month (with the lowest average sea temperature) is February (40.7°F).
Average daylight in January /
Average sunshine in January
Lewes, DE
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 5h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in January
Lewes, DE
- Average sunshine days in January: 17.1 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in January
Lewes, 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
Lewes, DE
- Average cloud cover in January: 41
The months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in January
Lewes, 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).
Lewes, Delaware, USA
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