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

July 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
July, like June, in Tucson, Arizona, is a very hot summer month, with average temperature varying between 74.5°F (23.6°C) and 99.7°F (37.6°C).

Temperature

In July, the average high-temperature is relatively the same as in June - a still very hot 99.7°F (37.6°C). In July, in Tucson, the average low-temperature is 74.5°F (23.6°C).

Heat index

The average heat index in July is calculated to a scorching 109.8°F (43.2°C). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, wind, metabolic differences). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

In Tucson, the average relative humidity is 41.6%.

Rainfall

In Tucson, during 9.8 rainfall days, 2.3" (57.2mm) of precipitation is typically accumulated. Throughout the year, in Tucson, Arizona, there are 52.9 rainfall days, and 11.6" (294.4mm) of precipitation is accumulated.

Snowfall

In Tucson snow does not fall in March through November.

Daylight

In Tucson, the average length of the day is 14h.

Sunshine

In Tucson, the average sunshine in July is 11.1h.

UV index

Months with the highest UV index in Tucson, Arizona, are May through August, with an average maximum UV index of 11. A UV Index value of 11, and more, symbolizes an extreme health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: In July, 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. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 July in Tucson?

In July, in Tucson, Arizona, the average high-temperature is 99.7°F (37.6°C), and the average low-temperature is 74.5°F (23.6°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that factores the actual air temperature with the relative humidity, in July is evaluated at 109.8°F (43.2°C).

What is the average humidity in July in Tucson?

In Tucson, Arizona, the average relative humidity in July is 41.6%.

How much does it rain in Tucson in July?

In Tucson, in July, during 9.8 rainfall days, 2.3" (57.2mm) of precipitation is typically accumulated.

When it does not snow in Tucson?

March through November are months without snowfall in Tucson, Arizona.

How many hours of daylight does Tucson have in July?

In July, the average length of the day is 14h.

How many hours of sunshine does Tucson have in July?

In Tucson, the average sunshine in July is 11.1h.

What are the months with the highest UV index in Tucson?

Months with the highest UV index are May through August, with an average maximum UV index of 11.

How high is the UV index in July in Tucson?

In July, the average daily maximum UV index in Tucson is 11. A UV Index of 11, and more, symbolizes an ultimate hazard to health from the exposure to the Sun's UV rays.
Average temperature in July - Tucson, AZ
  • Average high temperature in July: 99.7°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 July: 74.4°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 July - Tucson, AZ
  • Average humidity in July: 41.6%

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

Average rainfall in July - Tucson, AZ
  • Average rainfall in July: 2.3"

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 July - Tucson, AZ
  • Average rainfall days in July: 9.8 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 July - Tucson, AZ
  • Average snowfall in July: 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 July - Tucson, AZ
  • Average snowfall days in July: 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 July / Average sunshine in July - Tucson, AZ
  • Average daylight in July: 14h

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 July: 11.1h

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 July - Tucson, AZ
  • Average UV index in July: 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).