2012 Climate Summary for Casper
Natrona County International Airport
  • Second Warmest Year on Record (1940-2012)
    • Tied Record for Consecutive Days with Maximum >= 90°
    • Second Highest Number of Days with Maximum >= 90°
    • Warmest March on Record
    • Five Months in the Top Seven Warmest on Record
  • Sixth Driest Year on Record
  • Fifth Least Snowiest Year on Record
Temperature °F   Wind   Precipitation   Snowfall
 
Temperature °F
Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
 Average High
 37.8 34.9 58.7 63.6 70.4 87.2 92.9 88.9 79.4 58.4 52.1 37.2 63.5
 Mean High (1981-2010 Normals) 35.2 37.8 47.9 56.8 67.1 78.8 88.1 86.4 74.3 59.4 44.7 34.2 59.3
 Average Low  18.2  15.4 29.4 30.6 37.4 48.6  57.5 52.4 42.9 31.1 26.6 15.6 33.8
 Mean Low 14.3 15.7 22.4 28.6 37.2 45.7 53.0 51.5 41.4 31.0 21.6 13.5 31.4
 Average Temperature  28.0 25.2 44.1 47.1 53.9 67.9  75.2 70.7 61.2 44.8 39.4 26.4  48.6
 Mean Average Temperature 24.7 26.7 35.2 42.7 52.2 62.2 70.5 69.0 57.9 45.2 33.2 23.8 45.4
 Departure from Normal  3.3 -1.5 8.9 4.4 1.7 5.7  4.7 1.7 3.3 -0.4 6.2 2.6 2.8
 Rank - Warmest to Coldest
 73 years of record
(P.O.R 12/1939-2012)
14 45  1   7 
27  5   5  42 15 53  6  34  2 
 Highest Daily Maximum  51 49 77 83 88 100  100 97 90 83 69 57 100
 Date of Occurrence  5 22 31 24 16 24, 25  1 29 10 2 7 5 6/24,25
7/1
 Lowest Daily Minimum -2 4 9 16 24 37  48 40 31 17 -8  -11  -11
 Date of Occurrence 16 20 2 8 12 21  8 25 14 25 11 31 12/31
 Number of Days with:                          
    Maximum >= 90° 0 0 0 0 0 14  25 16 1 0 0 0 56
    Maximum <= 32° 6 9 2 0 0 0  0 0 0  0 3 11 31
    Minimum <= 32° 28 29 16 19 7 0  0 0 18  19 28 165
    Minimum <= 0°  2 0 0 0 0 0  0 0 0 2 3 7
 Record Highs Set or Tied 0 0 3 4 1 2 3 3 0 0 1 0 17
 Record Lows Set or Tied 0 0  0  0 0 1 0 0 0 1 0 0 2
 

Records set during 2012:

Temperatures (degrees F):

Top 5 Warmest Years in Casper
Rank Year Average Temperature °F
1 1994 49.1
2 2012 48.7
3 1954 48.3
4 1981 48.1
5 1992 48.0
 
    Consecutive Days with Maximum >= 90°
Rank Year
Dates Number of Days
1 2012 July 9 - 24 16
1 2002 June 23 - July 8 16
 
    Number of Days with Maximum >= 90°
Rank Year Number of Days
1 1988 57
2 2012 56
3 2000 53
4 2007 52
5 1994 51

 
Max

March: 71 on the 17th (tie), 76 on the 23rd (also record high so early in the season), 77 on the 31st (All-time record high for March and record high so early in the season).
April: 75 on the 1st (tie), 78 on the 11th, 82 on the 23rd (tie)83 on the 24th.
May: 88 on the 16th.
June: 100 on the 25th, 97 on the 28th (tie).
July: 100 on the 1st, 99 on the 3rd99 on the 20th (tie).
August: 96 on the 27th (tie), 95 on the 28th (tie), 97 on the 29th .
November: 61 on the 21st (tie).

Min:  

June:  37 on the 21st (tie).
October: 19 on the 17th (tie).
 
Casper 2012 Annual Summary - Temperature
 
Casper 2012 Annual Summary - Temperature (line graph)
              
 
Wind
Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
 Average Speed (MPH) 16.8 12.6 15.8 11.4 10.2 10.4  8.9 8.4 8.3 11.1 13.3 14.7 11.8
 Maximum 3-sec Gust 63 63 73 60 52 54  68 44 53 53 53 62 73
 Direction (tens of degrees) 23 24 23 21 24 23 37 36 25 25 21 21 23
 Date of Occurrence 21 25 26 12 1 18  11 15 10 16 21 2 3/26
              
 
Precipitation
Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
 Total (inches) 0.67 0.88 0.33 1.01 1.75 0.28 1.01 0.20 0.31 0.56 0.49 0.39 7.88
 Mean Precip (1981-2010 Normals) 0.51 0.57 0.82 1.29 2.02 1.61 1.41 0.85 1.08 1.11 0.76 0.49 12.52
 Departure from Normal 0.16 0.31 -0.49 -0.28 -0.27 -1.33 -0.40 -0.65 -0.77 -0.55 -0.27 -0.10 -4.64
 Percent of Normal 131 154 40 78 87 17 72 24 29 50 64 80 63

 Rank - Driest to Wettest
 73 years (P.O.R 12/1939-2012)

53  65
    6 
 24 35      9  
36 13 19 24 26 30   6 
 Greatest 24-HR Total 0.32 0.33 0.19 0.43 0.50 0.15 0.62 0.20 0.12 0.29 0.33 0.21 0.62
 Dates of Occurrence 21-22 22-23 7 14 23-24 9-10 22 10 6 23-24 9-10 26-27 7/22
 Number of Days with:                          
    Precipitation >= 0.01 6 7 3 9 8 6 7 1 7 7 4 7 72
    Precipitation >= 0.10 3 3  1 3 6 1 3 1 1 1 1 2 26
    Precipitation >= 1.00 0 0  0 0 0 0 0 0 0 0 0 0 0
 Days with Thunderstorms 0 0 0 1 3 3 10 2 3 0 0 0 22
Daily Precipitaton Records Set or Tied 1 1  1 1 0 0 0 0 0 0 0 0 4
             
Records set during 2012:

Precipitation:

Driest Years on Record
Rank Year Precipitation (inches)
1 1988 6.56
2 2001 6.76
3 2002 7.05
4 1960 7.34
5 1954 7.70
6 2012 7.88

One day Precipitation:

January:  0.28 on the 22nd.
February:  0.30 on the 19th.
March  0.19 on the 12th.
April  0.43 on the 12th.
November:  0.50  on the 1st.
December:  0.38  on the 31st.
 
Casper 2012 Annual Summary - Precipitation (bar graph)
 
Casper 2012 Annual Summary - Precipitation (line graph)
 
 
Snowfall
Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
 Total (inches) 9.1 10.8 3.1 2.7 0.0 0.0 0.0 0.0 0.0 5.2 7.5 6.0 44.4
 Mean Snowfall (1981-2010 Normals) 9.1 9.8 10.9 11.6 2.9 0.1 0.0 0.0 1.8 7.4 10.3 11.0 74.9
 Departure from Normal 0.0 1.0 -7.8 -8.9 -2.9 -0.1 0.0 0.0 -1.8 -2.2 -2.8 -5.0 -30.5
 Rank - Least Snowiest to Snowiest
 73 Years (P.O.R 12/1939-2012)
32 46  4    1* NA NA NA NA 38 30 25  5 
 Greatest 24-HR Total 2.3 3.5 2.5 1.2 0.0 0.0 0.0 0.0 0.0 2.4 4.0 2.1 4.0
 Dates of Occurrence 24 19 7 2 NA NA NA NA NA 6 10 27 11/10
 Number of Days with:                          
    Snowfall >= 1.0 inch 5 5 1 1 0 0 0 0 0 2  3 2 19
Daily Snowfall Records Set or Tied 0 1 1 0 0 0 0 0 0 0 0 0 2
              * ties 23 Mays with no snow
Records set during 2012:
 
Snowfall:

 

Least Snowiest Years
Rank Year Snowfall (inches)
1 1943 38.0
2 1963 39.0
3 2001 41.9
4 1962 42.9
5 2012 44.4
6 1942 47.3

One day Snowfall (inches):


February:  3.5  on the 19th.
March:  2.5  on the 12th.
 
Casper 2012 Annual Summary Snowfall - Seasonal (bar graph)
 
Casper 2012 Annual Summary - Seasonal Snowfall (line graph)
 
Casper 2012 Annual Summary - Annual Total (bar graph)
 
 
 


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