September 1999 Climatological Report
 

Temperature
Highest Maximum: 92°F - September 3, 4, 5
Lowest Minimum: 66°F - September 17
Average Maximum: 86°F
Average Minimum: 72°F
Mean: 79°F

Relative Humidity
Highest Observed: 99%
Lowest Observed: 39% - September 3
Average High Humidity: 96%
Average Low Humidity: 65%
Average Relative Humidity: 80%

Winds
Peak Wind Speed/Direction: 91 mph/NNW - September 15 (Hurricane Floyd)

Visibility/Cloud Ceiling
Lowest Visibility: 1 mile - September 18, 19, 20
Lowest Ceiling: 100 feet - September 12

Precipitation
Total for the Month: 12.78 inches
Precipitation Days Normally Expected: 16
Precipitation Days Observed: 15

Thunderstorms
Thunderstorm Days Normally Expected: 11
Thunderstorm Days Observed: 11


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