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Riverton Climate Summary Banner

...Highlights of 2016...

  • Annual: 2nd wettest year on record (1918-2016) with 181 percent of normal precipitation,  4th snowiest year on record with 166 percent of normal snowfall, 11th warmest year on record.
  • Seasonal:  Wettest Spring (March, April, May) on record with 9.11 inches of precipitation, shattering the old record in 1971 by 1.25 inches.
  • Monthly Temperatures: 8th warmest March (tie), 3rd warmest June, 8th warmest November on record.
  • Monthly Precipitation: 8th wettest January (tie), 2nd wettest March, wettest April, 10th wettest September, 2nd wettest December on record.
  • Monthly Snowfall: Snowiest March, 6th snowiest December on record (snowiest Christmas Day on record with 6.5 inches).

Temperature Banner   

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
 Average High  27.4 44.1 51.9 58.0 64.5 86.7 89.5 84.6 73.4 63.5 49.9 25.4 61.0
 Mean High (1981-2010 Normals) 31.0 37.4 49.6 60.3 69.2 79.4 88.2 86.7 74.9 60.0 43.1 29.5 59.1
 Average Low  3.2  16.3 25.8 34.0 39.4 51.1 54.3 50.4 44.4 34.3 21.5  2.3 31.4
 Mean Low (1981-2010 Normals) 6.2 11.0 22.5 30.6 40.1 48.1 54.0 51.4 41.4 30.0 17.6 5.4 29.9
 Average Temperature  15.3 30.2 38.9 46.0 52.0 68.9 71.9 67.5 58.9 48.9 35.7  13.8 45.7
 Mean Average Temperature (1981-2010 Normals) 18.6 24.2 36.1 45.4 54.6 63.8 71.1 69.0 58.2 45.0 30.3 17.4 44.5
 Departure from Normal  -3.3 6.0 2.8 0.6 -2.6 5.1 0.8 -1.5 0.7 3.9 5.4 -3.6 1.2
 Rank: Coldest         to          Warmest
 99 years of record
(P.O.R 12/1918-2016)
46 86 89 67 27 93 71 43 63 84 90 26 84
 Highest Daily Maximum  46 63 67 78 80 97 98 97 90 79 71 46 98
 Date of Occurrence  30 28 21 23 6  22 22 3 2 15 16 5 7/22
 Lowest Daily Minimum -16 -9 3 24 27  38 43 39 34 23 6 -26 -26
 Date of Occurrence 12 3 19 2 11  1  12 20 10,25 20 18 17 12/17
 Number of Days with:                          
    Maximum >= 90° 0 0 0 0 0 13 17 9 1 0 0 0 40
    Maximum <= 32° 22 5 0 0  0  0 0 0 0 0 3 22 52
    Minimum <= 32° 31 28 30 10  4  0  0 0 0 15 29 31 178
    Minimum <= 0°  12 3 0 0  0  0  0 0 0 0 0 13 28
 Record Highs Set or Tied 0 1 0 0  0 0 0 0 0 0 1 0 2
 Record Lows Set or Tied 0 0  0  0  0 0  0 0 0 0 0 0 0
 * Multiple day occurrence

Temperature Ranks and Records:

 Daily Records:

 
Max:

 

February:  63 on the 28th.
November:  71 on the 16th.

Record High So Late in the Season:  71 on November 16th.
 

Min:  

None.
 
 

 

   Warmest Months of March on Record
Rank Year Average Temperature °F
1 2012 43.9
2 1986 43.2
3 2007 42.2
4 1992 40.8
5 1934 40.5
6 1972 39.9
7 1940 39.2
8 2016, 1946 38.9
10 2000 38.7
 
Warmest Months of June on Record
Rank Year Average Temperature °F
1 1988 72.2
2 1977 69.3
3 2016 68.9
4 2006 68.8
5 2012 68.5
6 2015 68.4
7 1933 68.2
8 2013 67.6
9 2007 67.1
10 1961 66.9
 
Warmest Months of November on Record
Rank Year Average Temperature °F
1 1949 40.0
2 1954 38.6
3 1999 37.7
4 1927 37.0
5 2008 36.1
6 1926 36.0
7 1995 35.8
8 2016,1965 35.7
10 2006 35.3
 

 

 

   Warmest Years on Record (99 Years)
Rank Year Average Temperature °F
1 2012 48.5
2 2006, 1999 47.0
4 1934 46.9
5 2007 46.5
6 2005, 1981 46.3
8 1954 46.2
9 2015 46.0
10 1953 45.8
11 2016 45.7
 
   Top Ten Coldest Years on Record
Rank Year Average Temperature °F
1 1993 38.8
2 1924 39.5
3 1984, 1944 39.7
5 1978 40.1
6 1985 40.3
7 1968, 1929 40.5
9 1975 40.8
10 1986, 1932 41.0
84 2016 45.7

 

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 Average Annual Temperature for Period of Record - Click on Graph to Enlarge

  


 

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Precipitation Banner

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
 Total (inches) 0.49 0.19 2.70 3.82 2.59 0.12 0.13 0.22 1.75 1.55 0.75 0.93 15.24
 Mean Precipitation
(1981-2010 Normals)
0.28 0.34 0.56 0.98 1.45 1.21 0.78 0.50 0.83 0.85 0.41 0.24 8.42
 Departure from Normal 0.21 -0.14 2.14 2.84 1.14 -1.09 -0.65 -0.28 0.92 0.70 0.34 0.69 6.82
 Percent of Normal 175 58 482 390 179 10 17 44 211 182 183 388 181

 Rank -
Driest            to           Wettest
 99 years (P.O.R. 1918-2016)

89  48 98 99 78   11 16 36 91 80 78  96
 
99
 
 Greatest 24-HR Total  0.30 0.16  1.06 1.01 1.45  0.12 0.12 0.14 0.75 0.73 0.40 0.55 1.45
 Dates of Occurrence  8  2  30  26  7  14  1 19 23  4 17 26 5/7
 Number of Days with:                          
    Precipitation >= 0.01 4 3 7 10  11 1  2 3 6 6 3 6 91
    Precipitation >= 0.10 2 1  4 6  5  1  1 1 5 2 3 2 39
    Precipitation >= 1.00 0 0  1 1  1 0  0 0 0 0 0 0 2
Daily Precipitation Records Set or Tied 1 0  3 2  1  0 0 0 1 0 0 3 7

 

 

 

 

 

 

 

 

 

 

 

 

 

Precipitation Ranks and Records:

One Day Precipitation Records:

January: 0.30" on the 16.
March: 0.48" on the 8th, 0.61" on the 29th, 1.06" on the 30th.

September: 0.75" on the 23rd.
November: 0.40" on the 17th.
December: 0.55" on the 26th.

 


 

    Wettest Months of January on Record
Rank Year Precipitation (inches)
1 1995 1.44
2 1996 0.96
3 2014 0.63
4 1993 0.60
5 1953 0.56
6 1962 0.53
7 1932 0.51
8 2016 , 1949,
1940
0.49
 
    Wettest Months of March on Record
Rank Year Precipitation (inches)
1 1998 2.95
2 2016 2.70
3 1941 1.52
4 1992 1.21
5 1977 1.20
6 2009 1.15
7 1968 1.05
8 1958, 1924 1.03
10 1938 0.98
 
    Wettest Months of April on Record
Rank Year Precipitation (inches)
1 2016 3.82
2 1999 3.69
3 1944 3.47
4 1971 3.32
5 1941 2.96
6 1957 2.94
7 2004 2.80
8 1934 2.71
9 1945 2.32
10 1920 2.22
 
    Wettest Springs (March, April, May) on Record
Rank Year Precipitation (inches)
1 2016 9.11
2 1971 7.86
3 1957 7.55
4 1921 6.74
5 2010 6.69
6 1944, 1924 6.19
8 1908 6.14
9 2011 5.65
10 1995 5.61
 
    Wettest Months of September on Record
Rank Year Precipitation (inches)
1 1923 5.72
2 1973 4.45
3 1912 3.32
4 1950 3.19
5 2013 3.09
7 1982 2.89
8 1999 2.47
9 1989 2.15
10 2016 1.75
 
    Wettest Months of December on Record
Rank Year Precipitation (inches)
1 1955 0.96
2 2016 0.93
3 1997 0.89
4 1968 0.85
5 1982 0.79
7 1924 0.75
8 1972 0.72
9 1979 0.70
10 1985 0.68
 

 

 

   Top Ten Driest Years on Record
Rank Year Precpitation (inches)
1 1988 3.75
2 2012 3.98
3 1974 4.12
4 1954 4.85
5 2001, 2006 5.07
7 1966 5.66
8 1990 5.71
9 1922 5.91
10 1932 6.05
98 2016 15.24
 
   Top Ten Wettest Years on Record
Rank Year Precipitation (inches)
1 1923 18.43
2 2016 15.24
3 1941 14.74
4 1912 14.73
5 1993 13.49
6 1998, 1995 13.41
8 1971 13.11
9 1947 12.45
10 1944 12.19
 

 

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 Annual Precipitation for Period of Record - Click on Graph to Enlarge

  


 

 

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  Snow Banner

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
 Total (inches) 7.7 2.7 22.1 9.0 T 0.0 0.0 0.0 0.0 T 7.3 12.9 61.7
 Mean Snowfall (1981-2010 Normals) 4.8 6.0 5.9 6.1 1.2 0.0 0.0 0.0 0.3 3.7 4.3 4.8 37.1
 Departure from Normal 2.9 -3.3 16.2 2.9 -1.2 0.0 0.0 0.0 -0.3 -3.7 3.0 8.1 24.6
 Percent of Normal 160 45 375 148 0 0 0 0 0 0 170 269 166
  Rank - Least            to           Most
 99 years (P.O.R 1918-2016)
 80 40 93* 69 2* NA NA NA 1* 41* 71 85* 88*
 Greatest 24-HR Total 4.1 2.5 10.8 4.6  0.0 0.0  0.0 0.0 0.0 T 5.0 6.5 10.8
 Dates of Occurrence 8 2 30 27  NA NA NA NA NA  11 17 26 3/30
 Number of Days with:                          
    Snowfall >= 1.0 inch 2 1 5 3  0 0 0 0 0 0 2 3 20
Daily Snowfall Records Set or Tied 0 0 1 0  0 0 0 0 0 0 1 1 3

93* Months of March on record.
 * 3 months of May with a trace of snowfall.
 * 81 months of September on record with no snowfall.
 * 3 months of October with a trace of snowfall, 40 months of October with no snowfall reported.
 *   90 months of December on record.
 *   91 years with 12 months of snowfall on record (2016 was the 4th snowiest on record).

 

 

 

 

 

 

 

 

 

 

 

 






Snowfall Ranks and Records:

One Day Snowfall Records (inches):

March:  10.8" on the 30th.
November: 5.0" on the 17th.
December: 6.5" on the 26th.

 

   Snowiest Months of March on Record
Rank Year Snowfall (inches)
1 2016 22.1
2 1998 21.7
3 1968 19.5
4 1924 18.5
5 2009 15.2
6 1941 15.0
7 1973 14.0
8 2003, 1938 11.0
10 1996 10.9
 
   Snowiest Months of December on Record
Rank Year Snowfall (inches)
1 1985, 1972 19.0
3 1979, 1967 15.0
5 1968 14.5
6 2016 12.9
7 1955 12.5
8 1987 12.0
9 1982 11.9
10 1924 11.7
 
   Snowiest Christmas Days on Record
Rank Year Snowfall (inches)
1 2016 6.5
2 2014 3.2
3 2003 3.0
4 1951 1.5
5 2008, 1919 1.0
Snowfall for Christmas Day is reported on 12/26.
 

 

   Top Ten Snowiest Years on Record
Rank Year Snowfall (inches)
1 1920 77.0
2 2013 70.6
3 2009 62.5
4 2016 61.7
5 2010 60.1
6 1919 58.0
7 1923 56.2
8 1944 55.4
9 1987 53.5
10 1972 53.4

 

Click to enlarge Click to enlarge
Click to enlarge
 Annual and Seasonal Snowfall for Period of Record - Click on Graph to Enlarge

  

 


 

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