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PALATKA – December’s weather defied the usual dry trend of this time of year with the districtwide average rainfall more than doubling the typical total. Ten of the 18 counties within the St. Johns River Water Management District region received twice their average, while Duval, Nassau and Baker counties experienced rainfall levels nearing or even tripling their usual December amounts.
Monthly rainfall December 2023
A map illustrates rainfall conditions in December across the St. Johns River Water Management District.
With all the recent rain, it’s worth noting that during the cooler months, grass doesn’t require frequent watering. Providing one-half to three-quarters of an inch of water every 10–14 days suffices. If your lawn has received substantial rainfall, consider turning off your irrigation system and managing it manually when necessary.
You can evaluate when your grass needs watering by observing specific signs such as folded grass blades, a blue-gray appearance, or slow recovery from footprints.
A full report outlining December’s hydrologic conditions was presented at the District’s Governing Board meeting Jan. 8. Highlights include:
Rainfall
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Districtwide, December’s rainfall averaged 5.56 inches, which is 3 inches above monthly average.
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County-wide monthly rainfall totals ranged from a high of 8.74 inches in Baker County, to a low of 2.69 inches in Okeechobee County.
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Over the past 12 months, rainfall is near or slightly above average in most of the District.
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Districtwide, the cumulative rainfall total for the past 12 months is 54.41 inches, 3.40 inches above the long-term average. County-wide totals varied between 48.5 inches in Osceola County to 59.1 inches in Volusia County.
Groundwater
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Upper Floridan aquifer conditions were a mix of mostly high or normal range at the end of December.
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Districtwide groundwater levels, expressed as a single index, fall within th
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