January Weather in Monticello, United States

Last updated: June 24, 2025

In January, the average temperature in Monticello, United States hovers around 4°C (39°F). While you might experience chilly lows of -16°C (4°F), the mercury can rise to a pleasant 22°C (72°F). Expect about 97 mm (3.8 in) of precipitation over 11 days, paired with an average humidity of 88%, ensuring a unique mix of cool, damp weather. 🌧️

January Temperature in Monticello

In January in Monticello, the average temperature is 4°C (39°F), with a maximum that can reach 22°C (72°F) and a minimum that can drop as low as -16°C (4°F). Travelers should be prepared for a wide range of temperatures, from chilly days to unexpectedly warm afternoons.

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 4°C (39°F), with highs reaching up to 22°C (72°F) and lows dropping to around -16°C (4°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 total precipitation amount is 97 mm (3.8 in) over the course of 11 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 97 mm (3.8 inches) of precipitation spread over approximately 11 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 88%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm.

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 88%, 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	4°C (39°F)	97 mm (3.8 inches)	88%	moderate
February Weather	7°C (44°F)	180 mm (7.1 inches)	88%	high
March Weather	10°C (51°F)	147 mm (5.8 inches)	87%	high
April Weather	14°C (58°F)	145 mm (5.7 inches)	84%	very high
May Weather	20°C (68°F)	128 mm (5.0 inches)	84%	extreme
June Weather	23°C (74°F)	140 mm (5.5 inches)	83%	extreme
July Weather	26°C (78°F)	104 mm (4.1 inches)	79%	extreme
August Weather	24°C (76°F)	129 mm (5.1 inches)	66%	very high
September Weather	22°C (72°F)	114 mm (4.5 inches)	67%	very high
October Weather	17°C (62°F)	127 mm (5.0 inches)	76%	high
November Weather	9°C (48°F)	74 mm (2.9 inches)	89%	moderate
December Weather	7°C (44°F)	136 mm (5.4 inches)	88%	moderate