September 2012 Climatic Summary
 
September temperatures were generally 2 to 4 degrees above average across the area this month. The average monthly temperature was 3.1 degrees above normal across the region. The location with the highest departure in September was Mt. Rushmore, with an average temperature of 5.8 degrees above normal. Wood had the coolest departure, at 1.2 degrees above average.
 
Precipitation in September averaged only 10 percent of normal across the entire area. The only location that had near 50% normal precipitation was Wood, SD. On the dry end of the spectrum, eleven locations recorded zero to only a trace of precipitation for the month.
 
September significant storm summary...
 
With the above average temperatures and lack of moisture, September was extraordinarily quiet.
 
September 1st – A few isolated thunderstorms developed over the Black Hills and moved east across the plains. Wind gusts of 60 t0 70 mph were reported at the Rapid City Regional Airport, and in a few locations in eastern Pennington and southeastern Meade county .
 
 
LOCAL EXTREMES
Rapid City
Lead
Gillette
Temperature
Temperature
Date
Temperature
Date
Temperature
Date
Max. Temp.
100
1st
89
1st
95
1st, 10th
Min. Temp.
39
23rd
37
12th
31
13th
Precipitation
Rapid City
Lead
Gillette
Monthly Data
Amount
Date
Amount
Date
Amount
Date
Precipitation
0.03
 
T
 
0.04
 
Snowfall
0.0
 
0.0
 
0.0
 
Daily Data
Amount
Date
Amount
Date
Amount
Date
Max. Precipitation
0.02
6th
T
27th
0.02
10th, 17th
Max. Snowfall
0.0
 
0.0
 
0.0
 

 Return to Climate Summaries


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.