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January Weather in Waterbury, United States

Last updated: June 24, 2025

In January, the average temperature in Waterbury, United States hovers around -8°C (18°F), with the minimum dropping to a chilling -32°C (-26°F) and a maximum climbing to a mild 13°C (55°F). This month sees 87 mm (3.4 in) of precipitation over 12 days, contributing to an average humidity of 93%. Stay cozy and prepared for these wintry conditions!

January Temperature in Waterbury

In January in Waterbury, the average temperature is -8°C (18°F), with maximums reaching 13°C (55°F) and minimums dropping as low as -32°C (-26°F). Travelers should be prepared for extremely cold conditions and plan their activities accordingly.

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 -8°C (18°F), with highs reaching up to 13°C (55°F) and lows dropping to around -32°C (-26°F).
JanFebMarAprMayJunJulAugSepOctNovDec172128415463686659473223
Data source: Temperature data for Waterbury generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Waterbury

In Waterbury in January, the precipitation amount is 87 mm (3.4 in) over the course of 12 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 87 mm (3.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec8789841251101211401057915811792
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Waterbury

In Waterbury in January humidity is 93%. With an average temperature of -8°C (18°F), this humidity feels like a bone-chilling dampness that seeps into your clothes, making even the briefest moments outside feel uncomfortable and heavy, as if you're trudging through a misty, cold cloud that wraps around you.

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 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
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 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Waterbury, you can visit Hourly UV Index in Waterbury.

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 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
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.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)87 mm (3.4 inches)93%low
February Weather-6°C (21°F)89 mm (3.5 inches)92%moderate
March Weather-2°C (28°F)84 mm (3.3 inches)86%moderate
April Weather5°C (41°F)125 mm (4.9 inches)85%very high
May Weather12°C (54°F)110 mm (4.3 inches)80%very high
June Weather17°C (63°F)121 mm (4.8 inches)74%very high
July Weather20°C (68°F)140 mm (5.5 inches)76%very high
August Weather19°C (66°F)104 mm (4.1 inches)75%very high
September Weather15°C (59°F)79 mm (3.1 inches)78%high
October Weather9°C (48°F)158 mm (6.2 inches)86%moderate
November Weather0°C (32°F)117 mm (4.6 inches)88%moderate
December Weather-5°C (23°F)92 mm (3.6 inches)89%low

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