LIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
150 PM MDT SUN OCT 2 2011
...................................
...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2011...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2011
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 97 09/04/1995
09/01/1995
09/05/1899
LOW 17 09/29/1985
HIGHEST 96 09/01 97 -1 96 09/19
LOWEST 38 09/21 17 21 40 09/03
AVG. MAXIMUM 78.6 78.5 0.1 84.8
AVG. MINIMUM 49.9 48.3 1.6 49.1
MEAN 64.2 63.4 0.8 67.0
DAYS MAX >= 90 1 3.4 -2.4 8
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.8 -0.8 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 4.67 1961
MINIMUM T 1892
1944
TOTALS 0.89 0.98 -0.09 0.06
DAILY AVG. 0.03 0.03 0.00 0.00
DAYS >= .01 6 6.5 -0.5 3
DAYS >= .10 2 3.3 -1.3 0
DAYS >= .50 1 0.6 0.4 0
DAYS >= 1.00 0 0.1 -0.1 0
GREATEST
24 HR. TOTAL 0.56 09/14 TO 09/14 09/22 TO 09/22 09/22 TO 09/22
09/14 TO 09/15 09/21 TO 09/22
SNOWFALL (INCHES)
RECORDS
TOTAL 17.2 1971
TOTALS 0.0 1.1
DEGREE_DAYS
HEATING TOTAL 95 125 -30 32
SINCE 7/1 95 136 -41 35
COOLING TOTAL 78 76 2 100
SINCE 1/1 941 764 177 862
FREEZE DATES
RECORD
EARLIEST 09/08/1962
LATEST 06/08/2007
EARLIEST 10/07
LATEST 05/05
...................................................
WIND (MPH)
AVERAGE WIND SPEED 8.0
RESULTANT WIND SPEED/DIRECTION 2/206
HIGHEST WIND SPEED/DIRECTION 44/310 DATE 09/02
HIGHEST GUST SPEED/DIRECTION 53/310 DATE 09/02
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.50
NUMBER OF DAYS FAIR 12
NUMBER OF DAYS PC 15
NUMBER OF DAYS CLOUDY 3
AVERAGE RH (PERCENT) 44
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 2
LIGHT RAIN 5 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 7 FOG W/VIS <= 1/4 MILE 1
HAZE 7
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
...SEPTEMBER 2011 NEAR NORMAL FOR TEMPERATURE AND PRECIPITATION...
THE AVERAGE TEMPERATURE FOR SEPTEMBER WAS 62.4 DEGREES WHICH WAS 0.8
DEGREES ABOVE NORMAL. TEMPERATURES RANGED FROM A HIGH OF 96 DEGREES
ON THE FIRST TO A LOW OF 38 DEGREES ON THE 21ST. SEPTEMBER HAD A
WARM START...WITH A HIGH OF 96 DEGREES AND A MILD LOW TEMPERATURE OF
68 DEGREES ON THE FIRST. THE 96 DEGREES ON THE FIRST...WAS THE ONLY
DAY THAT MANAGED TO BREAK THE 90 DEGREE MARK FOR THE MONTH. THE 68
DEGREE MORNING LOW SET A NEW RECORD HIGH MINIMUM FOR THAT DATE.
AFTER THE FIRST...THERE WERE NO MORE 90 DEGREE DAYS. HOWEVER..THERE
WERE THREE DAYS...THE 5TH, 26TH AND 28TH WHERE THE TEMPERATURE
REACHED 89 DEGREES. THE ONE 90 DEGREE DAY IN SEPTEMBER BROUGHT THE
SEASONAL TOTAL UP TO 50 DAYS, WHICH IS 11 DAYS SHY OF THE ALL TIME
HIGH OF 61 DAYS BACK IN 2000. THIS PUTS 2011 IN A TIE FOR 9TH PLACE
FOR 90 DEGREE DAYS.
ONLY 0.89 INCHES OF PRECIPITATION FELL AT THE DENVER INTERNATIONAL
AIRPORT IN SEPTEMBER. THIS IS 0.09 INCHES BELOW THE NORMAL OF 0.98
INCHES. SIX DAYS IN SEPTEMBER HAD MEASURABLE PRECIPITATION...WITH
THE GREATEST TWENTY FOUR HOUR PRECIPITATION OF 0.56 INCHES ON THE
14TH. THERE WAS NO SNOWFALL RECORDED DURING THE MONTH...WHICH IS 1.1
INCHES BELOW THE NORM. THE LAST MEASURABLE SNOW RECORDED IN
SEPTEMBER WAS BACK IN 2000 WHEN 0.2 INCHES OF SNOW FELL.
THERE WERE 3 THUNDERSTORMS OBSERVED AT DENVER INTERNATIONAL
AIRPORT DURING THE MONTH. ONLY ONE DAY RECORDED DENSE FOG WITH A
VISIBILITY AT OR BELOW 1/4 MILE. THE PEAK WIND OF 53 MPH FROM A
NORTHWESTERLY DIRECTION OCCURRED ON THE 2ND.
JK
|
RSS Feeds