January Weather in Monmouth, United States

Last updated: June 24, 2025

In January, the average temperature in Monmouth, United States hovers around 5°C (42°F). Expect chilly days, with temperatures dipping to a minimum of -11°C (13°F) and occasionally rising to 15°C (59°F). Precipitation may reach 162 mm (6.4 in) over 17 days, contributing to an average humidity level of 85%. Prepare for a moist and cool atmosphere!

January Temperature in Monmouth

In January in Monmouth, the average temperature is 5°C (42°F). Maximum temperatures can reach 15°C (59°F), while minimums can drop as low as -11°C (13°F). Be prepared for a mix of chilly and mild weather 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 5°C (42°F), with highs reaching up to 15°C (59°F) and lows dropping to around -11°C (13°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 precipitation amount is 162 mm (6.4 in) over the course of 17 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 162 mm (6.4 inches) of precipitation spread over approximately 17 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 85%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

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 85%, 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 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 Monmouth, you can visit Hourly UV Index in Monmouth.

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 2, which falls under the low 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	5°C (42°F)	162 mm (6.4 inches)	85%	low
February Weather	5°C (41°F)	174 mm (6.9 inches)	84%	moderate
March Weather	7°C (45°F)	131 mm (5.2 inches)	85%	high
April Weather	10°C (50°F)	113 mm (4.5 inches)	83%	high
May Weather	13°C (56°F)	57 mm (2.3 inches)	83%	very high
June Weather	17°C (63°F)	44 mm (1.7 inches)	83%	very high
July Weather	20°C (68°F)	4 mm (0.1 inches)	82%	very high
August Weather	20°C (69°F)	6 mm (0.2 inches)	74%	very high
September Weather	17°C (63°F)	61 mm (2.4 inches)	71%	high
October Weather	11°C (53°F)	88 mm (3.5 inches)	81%	moderate
November Weather	8°C (46°F)	145 mm (5.7 inches)	87%	moderate
December Weather	5°C (41°F)	187 mm (7.4 inches)	87%	low