January Weather in Monticello, United States

Last updated: June 24, 2025

In January, the average temperature in Monticello, United States hovers around -2°C (29°F), but be prepared for extremes, as temperatures can plummet to a chilly -27°C (-17°F) or peak at a pleasant 18°C (64°F). Expect about 77 mm (3.0 in) of precipitation spread across 9 days, and stay cozy with an average humidity of 84%.

January Temperature in Monticello

In January in Monticello, the average temperature is -2°C (29°F). Maximum temperatures can reach 18°C (64°F), while the minimum can drop as low as -27°C (-17°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates January temperature patterns in Monticello, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monticello, January typically has an average temperature of -2°C (29°F), with highs reaching up to 18°C (64°F) and lows dropping to around -27°C (-17°F).

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

January Precipitation in Monticello

In Monticello in January, the precipitation amount is 77 mm (3.0 in) over the course of 9 days.

January Precipitation Trends in Monticello

The chart displays monthly precipitation patterns in Monticello, 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 Monticello, January typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 9 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 Monticello

In Monticello in January, humidity is 84%. With an average temperature of -2°C (29°F), this humidity feels like an icy blanket that clings to your skin, making it difficult to stay warm and comfortable while traveling.

January Average Humidity in Monticello

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

In Monticello 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 Monticello, you can check the information here.

Maximum UV Index Levels in Monticello for January

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

Data source: Monticello 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 Monticello Compares to Other Months

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

This table compares monthly weather conditions in Monticello, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	77 mm (3.0 inches)	84%	moderate
February Weather	0°C (32°F)	76 mm (3.0 inches)	82%	moderate
March Weather	6°C (43°F)	118 mm (4.7 inches)	84%	high
April Weather	11°C (52°F)	124 mm (4.9 inches)	83%	very high
May Weather	18°C (65°F)	144 mm (5.7 inches)	80%	very high
June Weather	24°C (75°F)	105 mm (4.1 inches)	83%	extreme
July Weather	25°C (78°F)	92 mm (3.6 inches)	82%	very high
August Weather	23°C (74°F)	101 mm (4.0 inches)	82%	very high
September Weather	21°C (70°F)	79 mm (3.1 inches)	79%	very high
October Weather	14°C (57°F)	118 mm (4.7 inches)	79%	high
November Weather	5°C (42°F)	74 mm (2.9 inches)	88%	moderate
December Weather	2°C (36°F)	54 mm (2.1 inches)	87%	moderate