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National Weather Service Tucson Arizona

HOME > The 2004 summer thunderstorm season began on July 8

Monsoon information

Tucson monsoon data

Monsoon start dates for Tucson
Average start	July 3rd
Earliest start	June 17 2000
Latest start	July 25 1987
Monsoon season rainfall (June 15th to September 30th)
Average monsoon season rainfall	6.06 inches
Driest monsoon season	1.59 inches in 1924
Wettest monsoon season	13.84 inches in 1964

The monsoon starts in Tucson when the daily dewpoint average is 54 degrees or greater for three consecutive days.

Monsoon index:

What is the Mexican Monsoon?

What is a Gulf of California Moisture Surge?

Why do thunderstorms occur during the summer?

Weather patterns associated with severe thunderstorms.

What is a monsoon thunderstorm?

Interesting satellite imagery.

Lightning information.

Monsoon workshop.

Publications list.

Acknowledgements

Webmaster
National Weather Service
Tucson Weather Forecast Office
520 North Park Ave, Suite 304
Tucson, AZ 85719

Tel: (520) 670-6526

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