A Statistical Preview of Denver's February Weather

       ...A STATISTICAL PREVIEW OF DENVER'S FEBRUARY WEATHER...
 
FEBRUARY IN DENVER IS TYPICALLY THE FINAL MONTH OF THE ANNUAL DRY PERIOD WHICH BEGINS IN NOVEMBER. FEBRUARY IS SIMILAR TO DECEMBER AND JANUARY WITH ALL THREE MONTHS AVERAGING LESS THAN A HALF INCH OF PRECIPITATION. TEMPERATURES BEGIN TO RISE OFF THE ANNUAL LOWS TOWARD THE END OF THE FEBRUARY AS THE NORTHERN HEMISPHERE TRENDS TOWARD SPRING. WINDY EPISODES ARE VERY COMMON DURING FEBRUARY AS THE STREAM OF STRONG WINDS ALOFT FREQUENTLY WAVERS OVER THE STATE DURING THE LATE WINTER PERIOD.
 
DENVER'S MONTHLY MEAN TEMPERATURE FOR FEBRUARY IS 32.5 DEGREES (1981-2010 AVERAGES) AND IS DENVER'S 3RD COLDEST MONTH OF THE YEAR BEHIND DECEMBER AND JANUARY RESPECTIVELY. FEBRUARY STARTS THE MONTH WITH A NORMAL HIGH OF 44 DEGREES. THE DAILY NORMAL HIGH TEMPERATURES BEGIN TO RAMP UP TOWARD THE END OF THE MONTH WHILE ENDING WITH A NORMAL HIGH OF 50 DEGREES. FOR LOW TEMPERATURES, THE MONTH BEGINS WITH A NORMAL LOW OF 17 DEGREES AND FINISHES WITH A LOW OF 22 DEGREES.
 
THE WARMEST TEMPERATURE EVER RECORDED DURING THE MONTH OF FEBRUARY, SINCE RECORDS BEGAN IN 1872, WAS 77 DEGREES ON BOTH THE 4TH DAY OF 1890 AND ALSO THE 28TH OF 2006. FEBRUARY'S COLDEST TEMPERATURE EVER IN DENVER WAS -25 DEGREES AND OCCURED ON BOTH THE 1ST OF 1951 AND ALSO ON 8TH OF 1936.
 
DENVER'S TOP 5 COLDEST FEBRUARYS (MEAN TEMPERATURES):
 
17.6 DEGREES 1899
21.8         1913
22.2         1883
22.4         1989
22.7         1903
 
DENVER'S TOP 5 WARMEST FEBRUARYS (MEAN TEMPERATURES):
 
43.7 DEGREES 1954
42.3         1930
41.0         1925
40.7         1957
40.5         1943
 
FOR DENVER'S NINE MONTH SNOW PERIOD OF SEPTEMBER THROUGH MAY, FEBRUARY RANKS 6TH BEHIND MARCH, NOVEMBER, DECEMBER, JANUARY AND APRIL. DENVER NORMALLY COLLECTS 5.7 INCHES OF SNOW IN FEBRUARY BASED ON AVERAGES FROM OLD STAPLETON INTL AIRPORT (1981-2010 AVERAGES). SIMILAR TO JANUARY, THE SNOWSTORMS ARE TYPICALLY LESS POTENT COMPARED TO THOSE OF DECEMBER AND MARCH AND ARE AFTEN DRIVEN BY CANADIAN AND ARCTIC SURFACE COLD FRONTS WITH LOWER MOISTURE CAPACITY.
 
DENVER'S SNOWIEST FEBRUARYS:
 
22.1 INCHES 1912
20.2        2012
19.5        1942
18.3        1909 AND 1960
18.0        1931
 
THE WINTER PERIOD OF DECEMBER THROUGH MARCH OVER THE HIGH PLAINS STATES OCCASIONALLY RECEIVES EXTENDED DROUGHT-LIKE CONDITIONS. THESE DRY PERIODS ARE OFTEN ASSOCIATED WITH LA NINA PHASES OF THE PACIFIC OCEANIC REGION AND CAN TAKE MONTHLY TEMPERATURES TO ABOVE SEASONAL NORMALS MAINLY DUE TO WARMER NIGHT-TIME LOW TEMPERATURES FROM LACK OF SNOW COVER. LA NINA PATTERNS ARE ALSO ASSOCIATED WITH CONTINUOUS WINDY DOWNSLOPE PERIODS ALONG THE EASTERN PLAINS REGION, INCLUDING THE FRONT RANGE FOOTHILLS AND THE ENTIRE I-25 CORRIDOR, INCLUDING DENVER. THIS DOWNSLOPE WEATHER FEATURE ALSO PROVIDES A WARM BIAS TO TEMPERATURES EAST OF THE CONTINENTAL DIVIDE.
 
DENVER'S LEAST SNOWIEST FEBRUARYS:
 
 T   INCHES 2009
0.3         1970 AND 1992
0.5         2005
0.6         1925 AND 1954
0.8         1983 AND 1991
 
 
                    ...THE OUTLOOK FOR FEBRUARY 2013...
 
JANUARY 2013 ENDED WITH NEAR NORMAL TEMPERATURES, PRECIPITATION AND SNOWFALL AS TWO WARM PERIODS WERE FOLLOWED BY TWO COLD PERIODS INCLUDING AN ARCTIC SURFACE COLD FRONT ON THE 11TH THROUGH THE 15TH. NO RECORDS WERE SET DURING THE MONTH OF JANUARY. FOR FEBRUARY 2013, THE FIRST 5 DAYS OF THE MONTH ARE EXPECTED TO BE UNSETTLED AND COLDER THAN NORMAL ACROSS NORTHERN COLORADO. THE SHORT TO MEDIUM RANGE MODELS INDICATE A PROGRESSIVE PATTERN OVER THE STATE FOR THE FIRST HALF OF THE MONTH. FOR THE REAMINDER OF FEBRUARY 2013, THE CLIMATE PREDICTION CENTER INDICATES TEMPERATURES AND PRECIPITATION TO HAVE EQUAL CHANCES OF FINISHING BELOW OR ABOVE AS A LACK OF STRONG BIAS TOWARD WARM OR COLD.
 
 
                       ...FEBRUARY STATISTICS...
 
...TEMPERATURES (1981-2010 NORMALS)...
 
AVERAGE HIGH........................... 46.2
AVERAGE LOW............................ 18.9
MONTHLY MEAN........................... 32.5
DAYS WITH HIGH 90 OR ABOVE.............   0
DAYS WITH HIGH 32 OR BELOW.............   4 (3.9)
DAYS WITH LOW 32 OR BELOW.............. 27 (26.9)
DAYS WITH LOWS ZERO OR BELOW...........   1 (1.3)
 
...PRECIPITATION...
 
MONTHLY MEAN...........................   0.32 INCH
DAYS WITH MEASURABLE PRECIPITATION.....   5 (5.3)
AVERAGE SNOWFALL........................ 5.7 INCHES (6TH SNOWIEST
                                                      MONTH)
 
...MISCELLANEOUS FEBRUARY AVERAGES...
 
HEATING DEGREE DAYS.................... 908
COOLING DEGREE DAYS....................    0
WIND SPEED (MPH).......................    8.8*
WIND DIRECTION......................... SOUTH*
DAYS WITH THUNDERSTORMS................    0* (0.1)
DAYS WITH DENSE FOG....................    2* (1.6)
PERCENT OF SUNSHINE....................   70*
(NOTE: SUNSHINE DATA ARE NO LONGER REPORTED AS OF OCTOBER 1, 2009)
 
* = 1971-2002 NORMALS
 
...FEBRUARY EXTREMES...
 
RECORD HIGH............................ 77 DEGREES ON 2/4/1890
                                                       2/28/2006
RECORD LOW............................. -25 DEGREES ON 2/1/1951
                                                       2/8/1936
WARMEST................................ 43.7 DEGREES IN 1954
MAXIMUM/MINIMUM COOLING DEGREES DAYS... NONE EVER RECORDED
COLDEST................................ 17.6 DEGREES IN 1899
MAXIMUM HEATING DEGREE DAYS............ 1210 IN 1913
MINIMUM HEATING DEGREE DAYS............   589 IN 1954
WETTEST................................   2.01 INCHES IN 1934
DRIEST.................................   0.01 INCHES IN 1970
 
FREDIN


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