December 2009 Climatological Report
 

Temperature
Highest Maximum: 85°F - December 9 and 13
Lowest Minimum: 39°F - December 29
Average Maximum: 72°F - Normal 72°F
Average Minimum: 57°F - Normal 55°F
Mean: 64°F - Normal 64°F

Relative Humidity
Highest Observed: 100% - December 15, 16, 22, 23, 30 & 31
Lowest Observed: 39% - December 28
Average High Humidity: 95%
Average Low Humidity: 64%
Mean Relative Humidity: 82% - Normal 80%

Winds
Peak Wind Speed/Direction: 35 mph/WSW, W - December 18 and 19
Observed Monthly Average: 8 mph
Normal Monthly Average: 7 mph

Visibility/Cloud Ceiling
Lowest Visibility: 1/16 mile - December 14
Lowest Ceiling: 100 feet - December 14 and 15

Precipitation
Total for the Month: 4.24 inches
Normal for the Month: 2.38 inches
Precipitation Days Observed: 8
Precipitation Days Normally Expected: 8

Thunderstorms
Thunderstorm Days Observed: 1
Thunderstorm Days Normally Expected: 1

Fog
Fog Days Observed: 4
Fog Days Normally Expected: 12


› Return to Climatological Reports Table of Contents