May Weather in Monticello, United States

Last updated: June 24, 2025

In May, the average temperature in Monticello, United States hovers around 20°C (68°F), with a minimum drop to 1°C (35°F) and a maximum rise to 33°C (91°F). Expect 128 mm (5.0 in) of precipitation over 13 days, contributing to a notably high average humidity of 84%. This combination of warmth and moisture creates a lush and vibrant atmosphere, perfect for outdoor enthusiasts!

May Temperature in Monticello

In May in Monticello, the average temperature is 20°C (68°F). The maximum can reach 33°C (91°F) and the minimum can be as low as 1°C (35°F). This range of temperatures makes Monticello an ideal destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates May 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, May typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (91°F) and lows dropping to around 1°C (35°F).

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

May Precipitation in Monticello

In Monticello in May, the precipitation amount is 128 mm (5.0 in) spread over 13 days.

May Precipitation Trends in Monticello

The chart displays monthly precipitation patterns in Monticello, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Monticello, May typically receives around 128 mm (5.0 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Monticello

In Monticello in May humidity is 84%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket, making travel a challenge as the air clings to your skin, and every step feels heavier in the mugginess.

May Average Humidity in Monticello

This chart illustrates the average monthly humidity levels in Monticello, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Monticello is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Monticello

In Monticello in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Monticello.

Maximum UV Index Levels in Monticello for May

The chart shows the monthly maximum UV Index (UVI) for Monticello in May, 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 May, the maximum UV index in Monticello typically reaches 11, which falls under the extreme exposure category.

Data source: Monticello May 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 May 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 May’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 May’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