nomadseason

May Weather in Fort Defiance, United States

Last updated: June 24, 2025

In May, the average temperature in Fort Defiance, United States hovers around 15°C (59°F). Expect a range from a chilly -3°C (28°F) at its lowest to a warm 30°C (86°F) at its peak. Visitors should prepare for 21 mm (0.8 in) of precipitation over roughly 3 days, while the average humidity sits comfortably at 48%.

May Temperature in Fort Defiance

In May in Fort Defiance, the average temperature is 15°C (59°F). The maximum can reach 30°C (86°F), while the minimum can drop as low as -3°C (28°F). Pack accordingly to enjoy a variety of weather during your travels!

May Weather in Fort Defiance: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Fort Defiance, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Defiance, May typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec293240515971737265524130
Data source: Temperature data for Fort Defiance generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Fort Defiance

In Fort Defiance in May, the precipitation amount is 21 mm (0.8 in) over a period of 3 days.

May Precipitation Trends in Fort Defiance

The chart displays monthly precipitation patterns in Fort Defiance, 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 Fort Defiance, May typically receives around 21 mm (0.8 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec31364316216482433271929
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Fort Defiance

In Fort Defiance in May humidity is 48%. With an average temperature of 15°C (59°F), this humidity feels like a refreshing breeze, making it comfortable for traveling as you can enjoy outdoor activities without feeling overheated or sticky.

May Average Humidity in Fort Defiance

This chart illustrates the average monthly humidity levels in Fort Defiance, 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 Fort Defiance is approximately 48%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%83%71%61%48%36%37%46%62%74%82%82%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Fort Defiance

In Fort Defiance in May, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Fort Defiance.

Maximum UV Index Levels in Fort Defiance for May

The chart shows the monthly maximum UV Index (UVI) for Fort Defiance 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 Fort Defiance typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111213131211864
Data source: Fort Defiance 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 Fort Defiance Compares to Other Months

Weather in Fort Defiance varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Fort Defiance, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Fort Defiance, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)31 mm (1.2 inches)81%moderate
February Weather0°C (33°F)36 mm (1.4 inches)83%very high
March Weather5°C (40°F)43 mm (1.7 inches)71%very high
April Weather10°C (51°F)16 mm (0.6 inches)61%extreme
May Weather15°C (59°F)21 mm (0.8 inches)48%extreme
June Weather22°C (71°F)6 mm (0.2 inches)36%extreme
July Weather23°C (73°F)48 mm (1.9 inches)37%extreme
August Weather22°C (72°F)24 mm (0.9 inches)46%extreme
September Weather18°C (65°F)33 mm (1.3 inches)62%extreme
October Weather11°C (52°F)26 mm (1.0 inches)74%very high
November Weather5°C (42°F)19 mm (0.7 inches)82%high
December Weather-1°C (31°F)29 mm (1.2 inches)82%moderate

Compare Fort Defiance's Climate with Cities Worldwide