Climatology 101: September swoon for Monsoon

After a blockbuster start, Monsoon 2017 ended with a thud.

Entering the month, Tucson was 0.08” shy of having Monsoon 2017 becoming one of the 10 wettest. The historical odds of September recording at least 0.08” is 90%, according to the National Weather Service.

This September ended up being in the other 10%.

Tucson only received 0.03” rainfall during the month of September. This marks the 11th driest September on record, matching the rain total in 1899.

Monsoon 2017’s final rainfall amount at Tucson International Airport (TIA) was 8.57”, which is the 11th wettest ever recorded.

In regards to temperature, last month ended up being Tucson’s 14th warmest on record. With an average temperature of 83°, September 2017 ties the mark also set in 2013, 2007 and 1947. Of note, the thermometer at TIA hit 100° or above 10 times. September typically only records 7 days in triple digit territory.

Click here for a complete look at the September climate report, compiled by the staff at National Weather Service Tucson.


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