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 month when Ronkonkoma sees the lowest average temperatures, with a high of 3.3°C (37.9°F) and a low of -1°C (30.2°F).Humidity
In January, the average relative humidity is 72%.Rainfall
The month with the least rainfall is January, when the rain falls for 8.3 days and typically collects 55mm (2.17") of precipitation.Snowfall
Months with snowfall are January through March, May, October and December. In Ronkonkoma, in January, snow falls for 4.3 days, with typically accumulated 35mm (1.38") of snow. Throughout the year, there are 14.7 snowfall days, and 156mm (6.14") 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 7:16 am and sunset at 4:35 pm. On the last day of January, in Ronkonkoma, sunrise is at 7:03 am and sunset at 5:08 pm EST.
Sunshine
In January, the average sunshine is 5.2h.UV index
January through March and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 2 in January translates into this advice:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. 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
What is the coldest time of year?
Is January cold?
What is the average humidity in January?
What is the driest month?
How many days does it rain in January?
How many days does it snow in January in Ronkonkoma?
How many hours of daylight does Ronkonkoma have in January?
When are sunrise and sunset in January in Ronkonkoma?
How many hours of sunshine does Ronkonkoma have in January?
What is the month with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Ronkonkoma, NY
- Average high temperature in January: 3.3°C
The warmest month (with the highest average high temperature) is August (25.6°C).
The month with the lowest average high temperature is January (3.3°C).
- Average low temperature in January: -1°C
The month with the highest average low temperature is August (22.1°C).
The coldest month (with the lowest average low temperature) is January (-1°C).
Average pressure in January
Ronkonkoma, NY
- Average pressure in January: 1017.4mbar
The month with the highest atmospheric pressure is November (1019mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).
Average wind speed in January
Ronkonkoma, NY
- Average wind speed in January: 22.2km/h
The windiest month (with the highest average wind speed) is January (22.2km/h).
The calmest months (with the lowest average wind speed) are July and August (14.5km/h).
Average humidity in January
Ronkonkoma, NY
- Average humidity in January: 72%
The months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).
Average rainfall in January
Ronkonkoma, NY
- Average rainfall in January: 55mm
The wettest month (with the highest rainfall) is December (95mm).
The driest month (with the least rainfall) is January (55mm).
Average rainfall days in January
Ronkonkoma, NY
- Average rainfall days in January: 8.3 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in January
Ronkonkoma, NY
- Average snowfall in January: 35mm
The month with the highest snowfall is March (54mm).
The months with the least snowfall are April, June, July, August, September and November (0mm).
Average snowfall days in January
Ronkonkoma, NY
- Average snowfall days in January: 4.3 days
The month with the highest number of snowfall days is February (4.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Ronkonkoma, NY
- Average daylight in January: 9h and 4min
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 1min
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
Ronkonkoma, NY
- Average sunshine days in January: 18.4 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in January
Ronkonkoma, 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
Ronkonkoma, 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 27).
Average visibility in January
Ronkonkoma, NY
- Average visibility in January: 9km
The months with the highest visibility are April, June, July, August, September, October and November (10km).
The months with the lowest visibility are January, February, March, May and December (9km).
Ronkonkoma, New York, USA
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