January Weather in Sullivan City, United States

Last updated: June 24, 2025

In January, the average temperature in Sullivan City, United States hovers around 16°C (62°F), offering a pleasant climate for outdoor activities. Expect temperatures to range from a chilly -1°C (31°F) to a warm 35°C (95°F). During this month, anticipate about 18 mm (0.7 in) of precipitation over 4 days, with an average humidity of 83%, adding to the overall atmosphere.

January Temperature in Sullivan City

In January in Sullivan City, the average temperature is 16°C (62°F), with maximums reaching 35°C (95°F) and minimums dropping to as low as -1°C (31°F). It's important to pack accordingly to enjoy a comfortable and pleasant trip to Sullivan City.

January Weather in Sullivan City: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Sullivan City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sullivan City, January typically has an average temperature of 16°C (62°F), with highs reaching up to 35°C (95°F) and lows dropping to around -1°C (31°F).

Data source: Temperature data for Sullivan City generated using information from the Copernicus Climate Change Service.

January Precipitation in Sullivan City

In Sullivan City in January, the total precipitation amount is 18 mm (0.7 in) spread over a duration of 4 days.

January Precipitation Trends in Sullivan City

The chart displays monthly precipitation patterns in Sullivan City, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Sullivan City, January typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Sullivan City

In Sullivan City in January humidity is 83%. With an average temperature of 16°C (62°F), this humidity feels like a warm, sticky embrace that can make traveling feel a bit heavy, leaving you longing for refreshing breezes and shaded spots to relax in.

January Average Humidity in Sullivan City

This chart illustrates the average monthly humidity levels in Sullivan City, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Sullivan City is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Sullivan City

In Sullivan City in January, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Sullivan City, you can refer to this Hourly UV Index in Sullivan City.

Maximum UV Index Levels in Sullivan City for January

The chart shows the monthly maximum UV Index (UVI) for Sullivan City in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Sullivan City typically reaches 6, which falls under the high exposure category.

Data source: Sullivan City January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Sullivan City Compares to Other Months

Weather in Sullivan City varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Sullivan City, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Sullivan City, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (62°F)	18 mm (0.7 inches)	83%	high
February Weather	18°C (65°F)	18 mm (0.7 inches)	79%	very high
March Weather	22°C (73°F)	28 mm (1.1 inches)	76%	very high
April Weather	25°C (78°F)	32 mm (1.2 inches)	77%	extreme
May Weather	28°C (83°F)	84 mm (3.3 inches)	80%	extreme
June Weather	30°C (86°F)	72 mm (2.8 inches)	73%	extreme
July Weather	31°C (87°F)	93 mm (3.7 inches)	66%	extreme
August Weather	31°C (88°F)	17 mm (0.7 inches)	65%	extreme
September Weather	29°C (84°F)	96 mm (3.8 inches)	73%	extreme
October Weather	25°C (78°F)	42 mm (1.6 inches)	76%	very high
November Weather	21°C (69°F)	30 mm (1.2 inches)	80%	high
December Weather	18°C (64°F)	20 mm (0.8 inches)	86%	high