September 2011 was a month of transition for the First Coast. There were periods of extreme drought, followed by heavy rainfall. Temperatures reflected this variability, with overnight lows averaging much below, while daily highs finished above normal.
All in all, the majority of the area finished September with below average rainfall. Officially, the month will go down in the books with a deficit of 1.62 inches. This brings the yearly deficit to about 3.5 inches of precipitation.
September's average monthly temperature actually came in slightly below normal, thanks to overnight lows. Still, 15 of the 30 days Jacksonville reached 90 degrees or above. So far, 117 days have been above 90 degrees this year.
Forecast For Next Month:
As for October, look for temperatures to be around average or slightly below for the first third of the month. Followed by more average to slightly above average readings to finish the month out. Temperatures, on a normal day, start out around 60 degree and finish around 80. Precipitation should be much below normal. The CPC suggests at least a departure from average of more than 40%. The First Coast usually sees around 3.86 inches of rainfall an average October. (It is important to note no rainfall fell at JIA during the month October 2010.) The only hope of seeing above normal precipitation would be from the influence of a tropical disturbance.
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| September 2011: Percentage of Normal Rainfall |
September's average monthly temperature actually came in slightly below normal, thanks to overnight lows. Still, 15 of the 30 days Jacksonville reached 90 degrees or above. So far, 117 days have been above 90 degrees this year.
Forecast For Next Month:
As for October, look for temperatures to be around average or slightly below for the first third of the month. Followed by more average to slightly above average readings to finish the month out. Temperatures, on a normal day, start out around 60 degree and finish around 80. Precipitation should be much below normal. The CPC suggests at least a departure from average of more than 40%. The First Coast usually sees around 3.86 inches of rainfall an average October. (It is important to note no rainfall fell at JIA during the month October 2010.) The only hope of seeing above normal precipitation would be from the influence of a tropical disturbance.
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