Posted by: senorwx | October 4, 2013

Soggy September

September continued its reputation as the rainiest month of the year in San Pancho. Tropical storm Manuel, having passed through politely a few days earlier, gathered up some additional water and came back with more than six inches of rain across September 22, 23, and 24. Leaky roofs and muddy floors abounded in parts of town, while our main street, Av. Tercer Mundo, flowed like the mighty Mississippi for lack of proper drainage. There was also major beach erosion.


September ended with more than 19 inches (49 cm) of precipitation. Impressive, but not a record amount as you can see from the monthly totals for the tenth month of the year (in inches):

September Monthly Rainfall

2008 – 9.26
2009 – 8.15
2010 – 28.26 (the great flood of ’10)
2011 – 2.81
2012 – 9.13
2013 – 19.10

High temperature was 92 F (33 C), and the average temperature for the month was 81 F (27 C). The Heat Index soared: the high was 117 F (47 C), with the average at 86 F (30 C) for the month.

Our annual rain total is now at 38 in (97 cm), well within the normal annual rain in San Pancho (except 2010, of course). So that could be it for the year.

San Francisco days are concluding. The rainy season here on the Riviera Nayarit could also be concluding. Or not. This morning we had 3/4 of an inch (1.8 cm) and the rest of the month could bring more. Look at the October history and make your own prediction about additional rain this year.

October Monthly Rainfall

2008 – 0.22
2009 – 3.79
2010 – 0.25 (did anyone notice this after the flood?)
2011 – 2.71
2012 – 3.37
2013 – 0.73 (thus far)

Just to put the rainy season in perspective, the San Pancho Weather Station historical data shows negligible precipitation (less than an inch) for the months of November through May. Only four exceptions to that: December 2009 with 3 in (8 cm) and February 2010 with 3 in and February 2012 with 4 inches (10 cm). The fourth exception is this past January when we had an inch of rain.

Will it rain more during October? You be the forecaster!

Thanks for your comments on the Heat Index chart that will be on the San Pancho Weather Station home page for the rest of the month. It makes clear the reason for our discomfort on the hottest days of the year. If you have an idea for a chart you’d like to see for the non-rainy season ahead, just pass it along in a comment. I’ll do my best.

The San Pancho Beach on A Sunny Day

The San Pancho Beach on A Sunny Day


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