Posted by: senorwx | September 1, 2014

The Long Hot Summer in San Pancho

August 2014 had the least rainfall on record at the San Pancho Weather station, but it was only a half an inch less than a year ago. How fickle our weather-memory is! The amount was low, but not unique.

Precipitation (in)
    Jan   Feb  Mar  Apr  May  June  July Aug Sept Oct Nov Dec Annual Tot.
2014 0.28 0.04 0.00 0.00 0.50 11.84 4.05  7.13  -  -   -  -       23.84
2013 0.92 0.06 0.00 0.00 0.00  2.41 8.29  7.65 19.10 1.97 0.70 3.09   44.1
2012 0.00 3.98 0.00 0.00 0.72  3.12 6.73  11.69 9.13 3.37 0.00 0.05   38.79
2011 0.00 0.00 0.00 0.00 0.00  4.51 13.59 12.34 2.81 2.71 0.08 0.07   36.11
2010 0.04 3.34 0.00 0.00 0.01  1.75 7.43  14.41 28.26 0.25 0.08 0.14    55.70
2009 0.07 0.06 0.00 0.00 0.74  7.20 7.64   8.20 8.15 3.79 0.37 3.03      39.24

What is more interesting is that the total rainfall for the year through August is about average. Conventional wisdom (i.e. walking and talking to others around town) is that we are way behind previous years for rain. The average of all six years since 2009 is 25.16 inches. August was only two inches off that mark. So let’s look at each year:

August Precipitation (in)
2014 23.84
2013 19.33
2012 26.24
2011 30.44
2010 26.99
2009 23.91

Remember that in 2010 we had no idea of the impending September downpours and record rains. Check it above. Rainfall for September 2010: 28.26 inches! Now there’s a weather event that created real memories. if you find someone who was in town then, just ask. They’ll remember!

The more interesting story from San Francisco, Nayarit for August was the heat and heat index temperatures this year. it all started in June when we had August-like temperatures.

The average temperature for June 2014 was 83.4 F (all hourly readings divided by 24…not the high temperature). The June average is usually between 80 and 81.

July averaged 84 where the average in past years is around 81.

And for August? The average was 83.4, just slightly above all previous years on record. And exactly the same as June of this year!

The Heat Index was up there in August, but it didn’t beat the high for July. Here are the high Heat Index records for this summer:

June 114.0 F
July 119.6
August 117.1

My take on it for those of us who have sweltered through the past 90 days is that we just got started on our warmest weather a month early this year. You can expect September’s average to be a couple of degrees cooler if that’s any comfort. And let’s hope we don’t have a repeat of September 2010’s rains!

 

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