January Weather in Monmouth, United States

Last updated: June 24, 2025

In January, the average temperature in Monmouth, United States hovers around -4°C (26°F). Expect a wide range, with minimum temperatures plunging to -30°C (-23°F) and daytime highs reaching up to 14°C (57°F). During this chilly month, precipitation measures 56 mm (2.2 in) over about 7 days, contributing to an average humidity of 81%.

January Temperature in Monmouth

In January in Monmouth, the average temperature is -4°C (26°F). The maximum can reach 14°C (57°F), while the minimum can drop as low as -30°C (-23°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates January temperature patterns in Monmouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monmouth, January typically has an average temperature of -4°C (26°F), with highs reaching up to 14°C (57°F) and lows dropping to around -30°C (-23°F).

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

January Precipitation in Monmouth

In Monmouth in January, the total precipitation amount is 56 mm (2.2 in) over a period of 7 days.

January Precipitation Trends in Monmouth

The chart displays monthly precipitation patterns in Monmouth, 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 Monmouth, January typically receives around 56 mm (2.2 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 Monmouth

In Monmouth in January, humidity is 81%. With an average temperature of -4°C (26°F), this humidity feels like a biting chill that seeps into your bones, making traveling quite uncomfortable and necessitating extra layers to stay warm and dry.

January Average Humidity in Monmouth

This chart illustrates the average monthly humidity levels in Monmouth, 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 Monmouth is approximately 81%, 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 Monmouth

In Monmouth 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 Monmouth, you can check the information here.

Maximum UV Index Levels in Monmouth for January

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

Data source: Monmouth 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 Monmouth Compares to Other Months

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

This table compares monthly weather conditions in Monmouth, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (26°F)	56 mm (2.2 inches)	81%	moderate
February Weather	-2°C (28°F)	63 mm (2.5 inches)	81%	moderate
March Weather	5°C (41°F)	102 mm (4.0 inches)	81%	high
April Weather	10°C (51°F)	99 mm (3.9 inches)	82%	very high
May Weather	17°C (64°F)	166 mm (6.6 inches)	78%	very high
June Weather	23°C (75°F)	138 mm (5.4 inches)	81%	extreme
July Weather	25°C (78°F)	93 mm (3.7 inches)	79%	very high
August Weather	23°C (75°F)	64 mm (2.5 inches)	77%	very high
September Weather	21°C (69°F)	99 mm (3.9 inches)	78%	very high
October Weather	13°C (55°F)	126 mm (5.0 inches)	78%	high
November Weather	4°C (40°F)	51 mm (2.0 inches)	87%	moderate
December Weather	1°C (33°F)	49 mm (1.9 inches)	84%	low