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May Weather in Monticello, United States

Last updated: June 24, 2025

In May, the average temperature in Monticello, United States hovers around 14°C (58°F). However, be prepared for a range: temperatures can dip as low as -2°C (28°F) or soar to a warm 31°C (89°F). Expect precipitation of approximately 139 mm (5.5 in) over 14 days, contributing to an average humidity of 69%.

May Temperature in Monticello

In May in Monticello, the average temperature is 14°C (58°F), with maximums reaching 31°C (89°F) and minimums dropping as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures during this time.

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 14°C (58°F), with highs reaching up to 31°C (89°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec272935465766727063533931
Data source: Temperature data for Monticello generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Monticello

In Monticello, in May, the precipitation amount is 139 mm (5.5 in) over the course of 14 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 139 mm (5.5 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec821089712713911512112798153105113
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Monticello

In Monticello in May, humidity is 69%. With an average temperature of 14°C (58°F), this humidity feels like a warm embrace, making it comfortable for traveling, though the air might feel a bit heavy and sticky as you explore.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
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 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)82 mm (3.2 inches)84%moderate
February Weather-2°C (30°F)108 mm (4.2 inches)82%moderate
March Weather2°C (35°F)97 mm (3.8 inches)81%high
April Weather8°C (47°F)127 mm (5.0 inches)78%very high
May Weather14°C (58°F)139 mm (5.5 inches)69%very high
June Weather19°C (66°F)115 mm (4.5 inches)69%very high
July Weather22°C (72°F)121 mm (4.8 inches)62%very high
August Weather21°C (70°F)127 mm (5.0 inches)65%very high
September Weather17°C (64°F)98 mm (3.8 inches)68%very high
October Weather12°C (53°F)153 mm (6.0 inches)74%high
November Weather4°C (39°F)105 mm (4.1 inches)82%moderate
December Weather0°C (32°F)113 mm (4.4 inches)80%low

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