January weather forecastSmithtown, NY
January
Weather in January
January, like December, in Smithtown, New York, is an icy winter month, with an average temperature varying between 37.6°F (3.1°C) and 28.9°F (-1.7°C).Temperature
Smithtown's temperature records reveal January as the coldest month, marked by average highs of 37.6°F (3.1°C) and lows of 28.9°F (-1.7°C).Humidity
In Smithtown, the average relative humidity in January is 72%.Rainfall
January is the month with the least rainfall. Rain falls for 7.8 days and accumulates 2.2" (56mm) of precipitation.Snowfall
Months with snowfall in Smithtown are January through March, November and December. In Smithtown, in January, snow falls for 4.2 days, with typically accumulated 1.14" (29mm) of snow. Throughout the year, there are 15.4 snowfall days, and 5.71" (145mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 38min.On the first day of the month, sunrise is at 7:17 am and sunset at 4:35 pm. On the last day of January, sunrise is at 7:04 am and sunset at 5:08 pm EST.
Sunshine
In January, the average sunshine is 5.2h.UV index
The months with the lowest UV index are January through March and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In January, a daily maximum UV index of 2 leads to the following instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Smithtown, NY
- Average high temperature in January: 37.6°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in January: 28.9°F
The month with the highest average low temperature is August (71.6°F).
The coldest month (with the lowest average low temperature) is January (28.9°F).
Average pressure in January
Smithtown, NY
- Average pressure in January: 30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Smithtown, NY
- Average wind speed in January: 12.8mph
The windiest month (with the highest average wind speed) is January (12.8mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in January
Smithtown, NY
- Average humidity in January: 72%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall in January
Smithtown, NY
- Average rainfall in January: 2.2"
The wettest month (with the highest rainfall) is July (3.94").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days in January
Smithtown, NY
- Average rainfall days in January: 7.8 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in January
Smithtown, NY
- Average snowfall in January: 1.14"
The month with the highest snowfall is March (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Smithtown, NY
- Average snowfall days in January: 4.2 days
The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Smithtown, NY
- Average daylight in January: 9h and 36min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 5h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in January
Smithtown, NY
- Average sunshine days in January: 18.5 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in January
Smithtown, NY
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in January
Smithtown, NY
- Average cloud cover in January: 44
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in January
Smithtown, NY
- 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).
