January Weather in Seymour, United States

Last updated: August 27, 2025

In January, the average temperature in Seymour, United States hovers around -7°C (20°F), with extremes reaching a chilling -32°C (-25°F) at the low end and a milder 9°C (48°F) at the high. Expect 39 mm (1.5 in) of precipitation over 7 days, contributing to a notably high average humidity of 89%. Stay warm and prepared for the fluctuating weather!

January Temperature in Seymour

In January in Seymour, the average temperature is -7°C (20°F), with a maximum reaching 9°C (48°F) and a minimum dropping as low as -32°C (-25°F). Travelers should be prepared for very cold conditions and dress warmly to enjoy their visit.

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

The chart illustrates January temperature patterns in Seymour, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seymour, January typically has an average temperature of -7°C (20°F), with highs reaching up to 9°C (48°F) and lows dropping to around -32°C (-25°F).

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

January Precipitation in Seymour

In Seymour in January, the precipitation amount is 39 mm (1.5 in) over the course of 7 days.

January Precipitation Trends in Seymour

The chart displays monthly precipitation patterns in Seymour, 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 Seymour, January typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 7 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 Seymour

In Seymour in January humidity is 89%. With an average temperature of -7°C (20°F), this humidity feels like a biting chill that seeps into your bones, making travel quite uncomfortable as you navigate the frosty air that clings to every breath.

January Average Humidity in Seymour

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

In Seymour 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 Seymour, you can check the information here.

Maximum UV Index Levels in Seymour for January

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

Data source: Seymour 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 Seymour Compares to Other Months

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

This table compares monthly weather conditions in Seymour, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	39 mm (1.5 inches)	89%	moderate
February Weather	-7°C (20°F)	48 mm (1.9 inches)	90%	moderate
March Weather	1°C (33°F)	60 mm (2.4 inches)	87%	moderate
April Weather	6°C (43°F)	100 mm (3.9 inches)	84%	high
May Weather	14°C (57°F)	107 mm (4.2 inches)	77%	very high
June Weather	20°C (69°F)	106 mm (4.2 inches)	75%	very high
July Weather	23°C (73°F)	111 mm (4.4 inches)	74%	very high
August Weather	21°C (70°F)	111 mm (4.4 inches)	73%	very high
September Weather	17°C (63°F)	67 mm (2.6 inches)	78%	high
October Weather	10°C (50°F)	96 mm (3.8 inches)	84%	moderate
November Weather	1°C (35°F)	49 mm (1.9 inches)	89%	moderate
December Weather	-3°C (26°F)	54 mm (2.1 inches)	87%	low