Tucson
Arizona, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Tucson, AZ

Sunset in downtown Tucson, Arizona with a skyline and a sentinel peak in the distance
Sunset in downtown Tucson, Arizona with a skyline and a sentinel peak in the distance
  • Average high temperature in May: 91.6°F

The warmest month (with the highest average high temperature) is June (100.3°F).
The month with the lowest average high temperature is December (64.8°F).

  • Average low temperature in May: 60.5°F

The month with the highest average low temperature is July (74.4°F).
The coldest month (with the lowest average low temperature) is December (39.1°F).

  • Average humidity in May: 22%

The month with the highest relative humidity is December (50%).
The month with the lowest relative humidity is June (21.1%).

  • Average rainfall in May: 0.2"

The wettest month (with the highest rainfall) is August (2.4").
Driest months (with the lowest rainfall) are May and June (0.2").

  • Average rainfall days in May: 1.8 days

The month with the highest number of rainy days is July (9.8 days).
The month with the lowest number of rainy days is June (1.7 days).

  • Average snowfall in May: 0"

The month with the highest snowfall is January (0.3").
Months with the lowest snowfall are March, April, May, June, July, August, September, October and November (0").

  • Average snowfall days in May: 0 days

Months with the highest number of snowfall days are January and February (0.2 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September, October and November (0 days).

  • Average daylight in May: 14h

Months with the longest days are May, June and July (Average daylight: 14h).
Months with shortest days are January and December (Average daylight: 10h).

  • Average sunshine in May: 12.9h

The month with most sunshine is June (Average sunshine: 13.2h).
The month with least sunshine is December (Average sunshine: 7.9h).

  • Average UV index in May: 11

Months with the highest UV index are May, June, July and August (UV index 11).
The month with the lowest UV index is December (UV index 3).

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