January Weather in Waterbury, United States

Last updated: June 24, 2025

In January, the average temperature in Waterbury, United States hovers around 0°C (32°F), with extremes ranging from a brisk -19°C (-3°F) to a comfortable 19°C (67°F). Expect about 69 mm (2.7 in) of precipitation over 8 days, contributing to a relatively high average humidity of 84%.

January Temperature in Waterbury

In January in Waterbury, the average temperature is 0°C (32°F). The maximum can reach 19°C (67°F), while the minimum can drop as low as -19°C (-3°F). Be sure to pack both warm clothing and lighter layers to accommodate the range of temperatures during your travels.

January Weather in Waterbury: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Waterbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterbury, January typically has an average temperature of 0°C (32°F), with highs reaching up to 19°C (67°F) and lows dropping to around -19°C (-3°F).

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

January Precipitation in Waterbury

In Waterbury in January, the precipitation amount is 69 mm (2.7 in) that falls over a period of 8 days.

January Precipitation Trends in Waterbury

The chart displays monthly precipitation patterns in Waterbury, 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 Waterbury, January typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 8 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 Waterbury

In Waterbury in January, humidity is 84%. With an average temperature of 0°C (32°F), this humidity feels like a cold, damp chill that seeps into your clothes, making traveling uncomfortable and necessitating extra layers to stay warm despite the moisture-laden air.

January Average Humidity in Waterbury

This chart illustrates the average monthly humidity levels in Waterbury, 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 Waterbury is approximately 84%, 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 Waterbury

In Waterbury 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 Waterbury, you can check the information here.

Maximum UV Index Levels in Waterbury for January

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

Data source: Waterbury 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 Waterbury Compares to Other Months

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

This table compares monthly weather conditions in Waterbury, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	69 mm (2.7 inches)	84%	moderate
February Weather	1°C (34°F)	93 mm (3.7 inches)	82%	moderate
March Weather	4°C (39°F)	91 mm (3.6 inches)	81%	high
April Weather	9°C (49°F)	130 mm (5.1 inches)	78%	very high
May Weather	15°C (60°F)	110 mm (4.3 inches)	69%	very high
June Weather	20°C (69°F)	99 mm (3.9 inches)	69%	very high
July Weather	24°C (75°F)	143 mm (5.6 inches)	62%	very high
August Weather	23°C (74°F)	94 mm (3.7 inches)	65%	very high
September Weather	19°C (67°F)	105 mm (4.1 inches)	68%	very high
October Weather	14°C (57°F)	138 mm (5.4 inches)	74%	high
November Weather	6°C (44°F)	93 mm (3.7 inches)	82%	moderate
December Weather	2°C (36°F)	124 mm (4.9 inches)	80%	low