January Weather in Suffolk, United States

Last updated: June 24, 2025

In January, the average temperature in Suffolk, United States hovers around 6°C (42°F), with a minimum dipping to -16°C (3°F) and a maximum reaching up to 24°C (75°F). Expect 91 mm (3.6 in) of precipitation spread over about 8 days, contributing to a cozy average humidity of 84%.

January Temperature in Suffolk

In January in Suffolk, the average temperature is 6°C (42°F). The maximum can reach 24°C (75°F), while the minimum can drop as low as -16°C (3°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates January temperature patterns in Suffolk, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Suffolk, January typically has an average temperature of 6°C (42°F), with highs reaching up to 24°C (75°F) and lows dropping to around -16°C (3°F).

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

January Precipitation in Suffolk

In Suffolk in January, the total precipitation amount is 91 mm (3.6 in) over the course of 8 days.

January Precipitation Trends in Suffolk

The chart displays monthly precipitation patterns in Suffolk, 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 Suffolk, January typically receives around 91 mm (3.6 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 Suffolk

In Suffolk in January humidity is 84%. With an average temperature of 6°C (42°F), this humidity feels like an uncomfortable chill that seeps into your bones, making travel less enjoyable as you find yourself bundled up yet still damp, longing for warmth and comfort.

January Average Humidity in Suffolk

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

In Suffolk in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Suffolk for better planning.

Maximum UV Index Levels in Suffolk for January

The chart shows the monthly maximum UV Index (UVI) for Suffolk 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 Suffolk typically reaches 4, which falls under the moderate exposure category.

Data source: Suffolk 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 Suffolk Compares to Other Months

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

This table compares monthly weather conditions in Suffolk, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (42°F)	91 mm (3.6 inches)	84%	moderate
February Weather	8°C (47°F)	102 mm (4.0 inches)	83%	high
March Weather	11°C (51°F)	84 mm (3.3 inches)	82%	very high
April Weather	16°C (61°F)	101 mm (4.0 inches)	81%	very high
May Weather	20°C (69°F)	120 mm (4.7 inches)	80%	very high
June Weather	24°C (76°F)	118 mm (4.6 inches)	82%	very high
July Weather	27°C (81°F)	140 mm (5.5 inches)	81%	extreme
August Weather	26°C (79°F)	168 mm (6.6 inches)	81%	very high
September Weather	23°C (75°F)	130 mm (5.1 inches)	78%	very high
October Weather	19°C (66°F)	84 mm (3.3 inches)	80%	very high
November Weather	11°C (52°F)	76 mm (3.0 inches)	84%	moderate
December Weather	8°C (47°F)	89 mm (3.5 inches)	84%	moderate