January Weather in Saint Johnsville, United States

Last updated: June 24, 2025

In January, the average temperature in Saint Johnsville, United States is a brisk -5°C (23°F). While you may experience a chilling low of -27°C (-16°F), there's also the chance of a surprisingly warm day with highs reaching 17°C (62°F). Be prepared for some wet weather, as 93 mm (3.7 in) of precipitation can be expected over 12 days, coupled with a high average humidity of 89%.

January Temperature in Saint Johnsville

In January in Saint Johnsville, the average temperature is -5°C (23°F). The maximum can reach 17°C (62°F) and the minimum can be as low as -27°C (-16°F). Be prepared for a wide range of temperatures, from chilly to quite mild, when traveling to Saint Johnsville during this time.

January Weather in Saint Johnsville: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Saint Johnsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Johnsville, January typically has an average temperature of -5°C (23°F), with highs reaching up to 17°C (62°F) and lows dropping to around -27°C (-16°F).

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

January Precipitation in Saint Johnsville

In Saint Johnsville in January, the precipitation amount is 93 mm (3.7 in) over the course of 12 days.

January Precipitation Trends in Saint Johnsville

The chart displays monthly precipitation patterns in Saint Johnsville, 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 Saint Johnsville, January typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Saint Johnsville

In Saint Johnsville in January, humidity is 89%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and prompting frequent breaks to warm up indoors.

January Average Humidity in Saint Johnsville

This chart illustrates the average monthly humidity levels in Saint Johnsville, 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 Saint Johnsville is approximately 89%, 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 Saint Johnsville

In Saint Johnsville in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Saint Johnsville, you can check the information here.

Maximum UV Index Levels in Saint Johnsville for January

The chart shows the monthly maximum UV Index (UVI) for Saint Johnsville 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 Saint Johnsville typically reaches 3, which falls under the moderate exposure category.

Data source: Saint Johnsville 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 Saint Johnsville Compares to Other Months

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

This table compares monthly weather conditions in Saint Johnsville, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	93 mm (3.7 inches)	89%	moderate
February Weather	-4°C (26°F)	110 mm (4.3 inches)	88%	moderate
March Weather	0°C (32°F)	94 mm (3.7 inches)	86%	high
April Weather	7°C (44°F)	132 mm (5.2 inches)	84%	very high
May Weather	14°C (57°F)	131 mm (5.2 inches)	76%	very high
June Weather	18°C (65°F)	119 mm (4.7 inches)	72%	very high
July Weather	21°C (70°F)	143 mm (5.6 inches)	66%	very high
August Weather	20°C (68°F)	129 mm (5.1 inches)	64%	very high
September Weather	16°C (62°F)	96 mm (3.8 inches)	72%	very high
October Weather	10°C (51°F)	170 mm (6.7 inches)	81%	high
November Weather	2°C (36°F)	117 mm (4.6 inches)	87%	moderate
December Weather	-2°C (28°F)	114 mm (4.5 inches)	84%	low