January weather forecast
Ronkonkoma, NY

Share

Weather in January

January, like December, in Ronkonkoma, New York, is another cold winter month, with temperature in the range of an average high of 37.9°F (3.3°C) and an average low of 30.2°F (-1°C).

Temperature

The month of January sees the lowest average temperatures, reaching 37.9°F (3.3°C) at the peak and 30.2°F (-1°C) at the low.

Humidity

The average relative humidity in January in Ronkonkoma is 72%.

Rainfall

The month with the least rainfall is January, when the rain falls for 8.3 days and typically collects 2.17" (55mm) of precipitation.

Snowfall

Months with snowfall in Ronkonkoma, New York, are January through March, May, October and December. In January, it is snowing for 4.3 days. Throughout January, 1.38" (35mm) of snow is accumulated. In Ronkonkoma, during the entire year, snow falls for 14.7 days and aggregates up to 6.14" (156mm) of snow.

Daylight

In Ronkonkoma, New York, 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, sunrise is at 7:03 am and sunset at 5:08 pm EST.

Sunshine

The average sunshine in January 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 of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In January, a regular UV index of 2 translates into these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest in Ronkonkoma?

January, with its average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 30.2°F (-1°C), holds the record as the coldest month in Ronkonkoma, New York.

How cold is it in Ronkonkoma in January?

The average high-temperature, in January, in Ronkonkoma, is 37.9°F (3.3°C), while the average low-temperature is 30.2°F (-1°C).

What is the average humidity in January in Ronkonkoma?

In Ronkonkoma, New York, the average relative humidity in January is 72%.

What is the driest month in Ronkonkoma?

January is the month with the least rainfall in Ronkonkoma, New York. Rain falls for 8.3 days and accumulates 2.17" (55mm) of precipitation.

How much does it rain in Ronkonkoma in January?

In Ronkonkoma, New York, during January, the rain falls for 8.3 days and regularly aggregates up to 2.17" (55mm) of precipitation.

How many days does it snow in January in Ronkonkoma?

In Ronkonkoma, New York, during January, snow falls for 4.3 days and regularly aggregates up to 1.38" (35mm) of snow.

What is the average length of the day in January in Ronkonkoma?

The average day length in January in Ronkonkoma is 9h and 38min.

When are sunrise and sunset in January in Ronkonkoma?

In January, on the first day of the month, sunrise is at 7:16 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 5:08 pm EST.

How many hours of sunshine does Ronkonkoma have in January?

In January, the average sunshine duration is 5.2h.

What are the months with the lowest UV index in Ronkonkoma?

The months with the lowest UV index in Ronkonkoma are January through March and December, with an average maximum UV index of 2.

What is the UV index reading in January in Ronkonkoma?

In January, the average daily maximum UV index in Ronkonkoma, New York, is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Ronkonkoma, NY

Average temperature in January - Ronkonkoma, NY
  • Average high temperature in January: 37.9°F

The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in January: 30.2°F

The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

Average pressure in January
Ronkonkoma, NY

Average pressure in January - Ronkonkoma, NY
  • Average pressure in January: 30.04"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
Ronkonkoma, NY

Average wind speed in January - Ronkonkoma, NY
  • Average wind speed in January: 13.8mph

The windiest month (with the highest average wind speed) is January (13.8mph).
The calmest months (with the lowest average wind speed) are July and August (9mph).

Average humidity in January
Ronkonkoma, NY

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 - Ronkonkoma, NY
  • Average rainfall in January: 2.17"

The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is January (2.17").

Average rainfall days in January
Ronkonkoma, NY

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 - Ronkonkoma, NY
  • Average snowfall in January: 1.38"

The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, June, July, August, September and November (0").

Average snowfall days in January
Ronkonkoma, NY

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 / 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 - 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 - 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 - 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 - Ronkonkoma, 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).

Ronkonkoma, New York, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location