January Weather in Trumbull, United States

Last updated: June 24, 2025

In January, the average temperature in Trumbull, United States hovers around 0°C (33°F). Expect the mercury to dip as low as -17°C (1°F) during chilly nights, while daytime highs can reach up to 17°C (63°F). With an average precipitation of 77 mm (3.0 in) over 8 days, and humidity levels around 84%, be prepared for a moist and brisk atmosphere!

January Temperature in Trumbull

In January in Trumbull, the average temperature is 0°C (33°F). Maximum temperatures can reach 17°C (63°F), while minimum temperatures can drop as low as -17°C (1°F). Prepare for a mix of chilly and mild weather when traveling during this time.

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

The chart illustrates January temperature patterns in Trumbull, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trumbull, January typically has an average temperature of 0°C (33°F), with highs reaching up to 17°C (63°F) and lows dropping to around -17°C (1°F).

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

January Precipitation in Trumbull

In Trumbull in January, the precipitation amount is 77 mm (3.0 in) distributed over 8 days.

January Precipitation Trends in Trumbull

The chart displays monthly precipitation patterns in Trumbull, 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 Trumbull, January typically receives around 77 mm (3.0 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 Trumbull

In Trumbull in January humidity is 84%. With average temperature 0°C (33°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures less enjoyable and travel plans challenging.

January Average Humidity in Trumbull

This chart illustrates the average monthly humidity levels in Trumbull, 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 Trumbull 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 Trumbull

In Trumbull 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 Trumbull, you can check the information here.

Maximum UV Index Levels in Trumbull for January

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

Data source: Trumbull 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 Trumbull Compares to Other Months

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

This table compares monthly weather conditions in Trumbull, 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 (33°F)	77 mm (3.0 inches)	84%	moderate
February Weather	1°C (35°F)	114 mm (4.5 inches)	82%	moderate
March Weather	4°C (40°F)	99 mm (3.9 inches)	81%	high
April Weather	9°C (49°F)	135 mm (5.3 inches)	78%	very high
May Weather	15°C (59°F)	119 mm (4.7 inches)	69%	very high
June Weather	20°C (69°F)	95 mm (3.7 inches)	69%	very high
July Weather	24°C (76°F)	132 mm (5.2 inches)	62%	very high
August Weather	23°C (74°F)	102 mm (4.0 inches)	65%	very high
September Weather	20°C (68°F)	105 mm (4.1 inches)	68%	very high
October Weather	15°C (59°F)	152 mm (6.0 inches)	74%	high
November Weather	7°C (46°F)	100 mm (4.0 inches)	82%	moderate
December Weather	3°C (37°F)	135 mm (5.3 inches)	80%	low