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May Weather in Monticello, United States

Last updated: June 24, 2025

In May, the average temperature in Monticello, United States is a pleasant 23°C (74°F). Expect fluctuations, with minimums dipping to 8°C (47°F) and maximums reaching 34°C (93°F). Rainfall is notable, averaging 125 mm (4.9 in) over 11 days, contributing to a relatively high average humidity of 83%.

May Temperature in Monticello

In May in Monticello, the average temperature is 23°C (74°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 8°C (47°F). This wide range makes it essential for travelers to pack accordingly, ensuring comfort during both warm days and cooler nights.

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 23°C (74°F), with highs reaching up to 34°C (93°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec485261657480838280695552
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 125 mm (4.9 in) over the course of 11 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 125 mm (4.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec125199141176125106107917213191128
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 83%. With an average temperature of 23°C (74°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier, and leaving you constantly in search of a cool breeze or shade while exploring.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%80%82%83%80%80%75%73%76%84%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec478111112121110864
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 Weather9°C (48°F)125 mm (4.9 inches)84%moderate
February Weather11°C (53°F)199 mm (7.8 inches)83%high
March Weather16°C (61°F)141 mm (5.6 inches)80%very high
April Weather18°C (65°F)176 mm (6.9 inches)82%extreme
May Weather23°C (74°F)125 mm (4.9 inches)83%extreme
June Weather27°C (80°F)106 mm (4.2 inches)80%extreme
July Weather28°C (83°F)107 mm (4.2 inches)80%extreme
August Weather28°C (83°F)91 mm (3.6 inches)75%extreme
September Weather27°C (80°F)72 mm (2.8 inches)73%very high
October Weather21°C (69°F)131 mm (5.2 inches)76%very high
November Weather13°C (56°F)91 mm (3.6 inches)84%high
December Weather11°C (52°F)128 mm (5.0 inches)88%moderate

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