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
May, the last month of the spring, in Tucson, is a tropical month, with average temperature fluctuating between 91.6°F (33.1°C) and 60.4°F (15.8°C).

Temperature

In Tucson, the average high-temperature increases, from a warm 82°F (27.8°C) in April, to a hot 91.6°F (33.1°C). The average low-temperature, in Tucson, Arizona, is 60.4°F (15.8°C).

Humidity

In Tucson, the average relative humidity in May is 22%.

Rainfall

In Tucson, during May, the rain falls for 1.8 days and regularly aggregates up to 0.2" (5.8mm) of precipitation. In Tucson, during the entire year, the rain falls for 52.9 days and collects up to 11.6" (294.4mm) of precipitation.

Snowfall

In Tucson snow does not fall in March through November.

Daylight

In Tucson, Arizona, the average length of the day is 13.8h.

Sunshine

In Tucson, the average sunshine in May is 12.9h.

UV index

May through August, with an average maximum UV index of 11, are months with the highest UV index in Tucson. A UV Index of 11, and more, symbolizes an extreme threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 11 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim.

What is the temperature in May in Tucson?

In May, in Tucson, the average high-temperature is 91.6°F (33.1°C), and the average low-temperature is 60.4°F (15.8°C).

What is the average humidity in May in Tucson?

In May, the average relative humidity is 22%.

How many days does it rain in May in Tucson?

In May, in Tucson, Arizona, the rain falls for 1.8 days. Throughout May, 0.2" (5.8mm) of precipitation is accumulated.

When it does not snow in Tucson?

March through November are months without snowfall in Tucson.

What is the average length of the day in May in Tucson?

The average length of the day in May in Tucson, Arizona, is 13.8h.

How many hours of sunshine does Tucson have in May?

In Tucson, the average sunshine in May is 12.9h.

When is the highest UV index in Tucson?

May through August, with an average maximum UV index of 11, are months with the highest UV index in Tucson, Arizona.

What is the UV index intensity in May in Tucson?

In Tucson, Arizona, the average daily maximum UV index in May is 11. A UV Index of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV radiation.
Average temperature in May - Tucson, AZ
  • 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 - Tucson, AZ
  • 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 - Tucson, AZ
  • 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 - Tucson, AZ
  • 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 - Tucson, AZ
  • 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 - Tucson, AZ
  • 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 / Average sunshine in May - Tucson, AZ
  • Average daylight in May: 13.8h

The month with the longest days is June (Average daylight: 14.2h).
The month with shortest days is December (Average daylight: 10.1h).

  • 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 - Tucson, AZ
  • 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).