January Weather in Monticello, United States

Last updated: June 24, 2025

In Monticello, United States, the average temperature in January hovers around -2°C (29°F). However, be prepared for a wide range; temperatures can dip as low as -27°C (-16°F) and soar to a maximum of 16°C (61°F). Expect precipitation of about 59 mm (2.3 in) spread over 7 days, and a notable average humidity of 82%.

January Temperature in Monticello

In January in Monticello, the average temperature is -2°C (29°F), with a maximum that can reach 16°C (61°F) and a minimum that can drop as low as -27°C (-16°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable.

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 16°C (61°F) and lows dropping to around -27°C (-16°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 59 mm (2.3 in) over a span of 7 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 59 mm (2.3 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 Monticello

In Monticello in January, humidity is 82%. With an average temperature of -2°C (29°F), this humidity feels like a frigid chill that seeps into your bones, making travel quite uncomfortable and forcing you to bundle up tightly to ward off the damp cold that lingers in the air.

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 82%, 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)	59 mm (2.3 inches)	82%	moderate
February Weather	-1°C (31°F)	57 mm (2.2 inches)	80%	moderate
March Weather	7°C (44°F)	115 mm (4.5 inches)	80%	high
April Weather	11°C (53°F)	100 mm (4.0 inches)	80%	very high
May Weather	18°C (66°F)	177 mm (7.0 inches)	82%	very high
June Weather	24°C (76°F)	105 mm (4.1 inches)	83%	extreme
July Weather	26°C (79°F)	91 mm (3.6 inches)	81%	very high
August Weather	24°C (76°F)	93 mm (3.7 inches)	80%	very high
September Weather	21°C (71°F)	81 mm (3.2 inches)	76%	very high
October Weather	14°C (57°F)	114 mm (4.5 inches)	76%	high
November Weather	5°C (42°F)	52 mm (2.1 inches)	85%	moderate
December Weather	2°C (36°F)	41 mm (1.6 inches)	86%	moderate