Casper 2007 Climate Summary

2007 Climate Summary for Casper-Natrona County International Airport

Month

Avg

High

Avg

Low

Average

Temp

Departure

From

Normal

Total

Pcpn

Departure

From

Normal

Snowfall

Avg Snow

Departure

January

27.6

10.6

19.1

-3.2

0.52

-0.06

13.9

11.1

2.8

February

40.9

14.7

27.8

1.1

0.26

-0.38

4.3

10.7

-6.4

March

55.2

25.9

40.6

5.6

1.36

0.46

14.1

12.3

1.8

April

56.6

29.3

43.0

0.3

0.37

-1.15

3.7

13.8

-10.1

May

69.9

38.5

54.2

2.1

2.86

0.48

11.3

4.9

6.4

June

83.3

44.6

64.0

1.3

0.72

-0.71

T

0.1

-0.1

July

92.5

57.1

74.8

4.8

3.54

2.25

0

0

0.0

August

86.9

54.3

70.6

2.0

2.57

1.84

0

0

0.0

September

75.2

43.1

59.2

1.6

0.71

-0.27

0

2.0

-2.0

October

62.0

32.9

47.5

1.8

1.08

-0.06

3.0

7.1

-4.1

November

50.0

21.2

35.6

3.6

0.05

-0.77

0.8

12

-11.2

December

29.5

12.3

20.9

-2.9

0.74

0.12

16.1

11.9

4.2

Total/Ave

60.8

32.2

46.5

1.6

14.78

1.75

67.2

85.9

-18.7

 

 

Yearly Extremes:

Highest Temperature: 100 degrees on June 24th and July 7th.
Lowest Temperature: -20 degree on February 1st.
Most Precipitation in One Day: 2.21 on August 2nd.
Most Snowfall in One Day: 11.2 on May 5th.
Highest Wind Gust:
63 mph on November 13th.

  
Records set during 2007:

 Temperatures (degrees F):

Maximum

          March:  68 on the 12th; 71 on the 13th, 17th, 18th, and 25th; 73 on the 20th.

April: 80 on the 28th (tie).

May: 82 on the 11th.

June: 99 on the 29th.

July:  99 on the 17th.

August: 94 degrees on the 31st (tie).

September: 87 on the 22nd (tie).

October: 72 on the 25th (tie).

November: 68 on the 9th,  67 on the 19th.

December: 54 degrees on the 14th.

 

Monthly: 4th Warmest March

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 

Minimums:

June: 34 on the 7th ,  38 on the 19th.

 

Precipitation:

One day Precipitation:

                  January: 0.15 on the 11th.

March: 0.37 on the 27th, 0.50 on the 28th.

May: 2.20 on the 5th.

July: 1.62 on the 25th, 1.32 on the 27th.

August: 2.21 on the 2nd (also broke daily precipitation record for August).

One day Snowfall:

                January:  5.1 inches on the 11th.

    March: 9.4 on the 29th, 2.5 on the 30th.

    May: 11.2 on the 5th.

    October: 2.0 on the 21st.

 

Monthly Precipitation: 6th driest April, 3rd wettest August.

Monthly Snowfall: 7th snowiest December.

Seasonal Snowfall: None set

Yearly: None set

 

Monthly Reviews:

 

JANUARY 2007 – Slightly Colder and Drier than Normal

     A snowstorm on the 11th and 12th dumped up to a foot of snow in the Casper area when an Arctic cold front moved through the area.  This snowfall was followed by very cold temperatures with the airport recording a low of 15 below zero on the 12th. Casper’s average monthly temperature was 19.1 degrees, 3.2 degrees colder than normal.

    The total precipitation for January was 0.52 inches which was 0.06 inches below normal.  Snowfall for the month was 13.9 inches; 2.8 inches above normal.
 

FEBRUARY 2007 – Drier and Slightly Warmer than Normal

     Casper’s average monthly temperature was 27.8 degrees, 1.1 degrees above normal. The lowest minimum temperature for the month was 20 below zero on the first.  The total precipitation for February was 0.26 inches which was 0.38 inches below normal.  Snowfall for the month was 4.3 inches which was 6.4 inches below normal.

MARCH 2007 – Fourth Warmest March on Record, But Went Out Like a Lion

    A strong early Spring snowstorm dumped 12-15 inches of snow in the Casper area with 54 inches recorded on Casper Mountain.  Casper’s average monthly temperature was 40.6 degrees which was 5.6 degrees above normal and resulted in the fourth warmest March on record.    Six daily high temperature records were broken this month:  68 degrees on the 12th,  71 degrees on the 13th, 17th, 18th and 25th, and 73 degrees set on the 20th.  No daily record low temperatures were set during the month.  Precipitation totaled 1.36 inches which was 151 percent of normal.  14.1 inches of snowfall accumulated which was 115 percent of normal.

APRIL 2007 – Sixth Driest April on Record

     Casper’s average monthly temperature was 43.1 degrees which was 0.4 degrees above normal.  A high of 80 degrees on the 28th tied the daily record set back in 2000. The monthly precipitation total of 0.37 inches was 1.15 inches below normal, making it the sixth driest April on record.  Snowfall for the month was 3.7 inches which was 10.1 inches below normal.

May 2007 - Major Snowstorm on the 5th Pushes Month to 14th Wettest on Record

     Casper’s average monthly temperature was 54.5 degrees which was 2.4 degrees above normal for May.   A record high of 82 was set on the 11th.  The total precipitation was 2.86 which is 0.48 inches above normal.   The greatest 24 hour amount was 2.23 inches

which occurred on the 5th and 6th. Total snowfall for the month was 11.3 inches which was 231 percent of normal.   11.2 inches of this snow along with 2.20 inches of precipitation fell during a powerful Spring storm on the 5th, setting both a daily snowfall and precipitation record.  Up to 20 inches of snow was measured on the south side of Casper from this storm.

 

JUNE 2007 – Warmer and Drier than Normal

    Casper’s average monthly temperature was 64.0 degrees which was 1.3 degrees above normal.  A record high of 99 degrees was set on the 29th.  The only two record lows for the entire year occurred in June: 34 degrees on the 7th and 38 degrees on the 19th. The total precipitation for June was 0.72 inches which was only 50 percent of normal.  The greatest 24 hour amount was 0.71 of an inch which occurred on the 6th and 7th.
 

JULY 2007 – Flash Flooding, Wettest on Record, and Fourth Warmest on Record

 

     Slow-moving storms in a very moist environment produced copious amounts of rain in a short amount of time just west and southwest of  Casper on July 19th.  Although the airport only recorded a trace of precipitation on the 19th, one foot of water was reported in several locations on Poison Spider Road with additional flooding in the Goose Egg and Jackson Canyon area. 


    Monsoonal moisture resulted in another round of moisture-laden storms hitting the Casper area July 25-27th when a total of 3.02 inches of rainfall was recorded at the airport during this three day span.   Total precipitation for the month was 3.54 inches which was 2.25 inches or 275 percent above normal and resulted in the wettest July on record.  

    Casper’s average temperature for the month was 74.8 degrees which was 4.8 degrees above normal and resulted in the fourth warmest July on record.  A record high of 99 degrees was set on the 17th, but the warmest reading for the month was 100 degrees on the 7th.

AUGUST 2007 – Third Wettest on Record, Flash Flooding on the 2nd.

    Casper’s average temperature for the month was 70.6 degrees which was 2.0 degrees above normal.  The highest temperature for the month was 97 degrees on the 13th, and the lowest temperature was 43 on the 25th.  Highs of 93 degrees on the 30th and 94 degrees on the 31st tied previous record highs.

   Total precipitation for the month was 2.57 inches which was 352 percent or 1.84 inches above normal.  2.21 inches of this precipitation fell during intense thunderstorms on the 2nd that resulted in a daily precipitation record for the date and a daily precipitation record for August.   These storms also produced extensive flash flooding around Casper.

 

SEPTEMBER 2007 – Slightly Warmer and Drier than Normal, No Snow.

    Casper’s average monthly temperature was 59.1 degrees, which was 1.5 degrees above normal.  Casper tied one record high temperature of 87 degrees on the 22nd.   The highest temperature for the month was 92 degrees on the 2nd and 3rd, and the lowest temperature was 31 degrees on the 14th and 27th.  Total precipitation was 0.71 inches which was 0.27 inches below normal.  No snowfall was recorded during the month. 

 

OCTOBER 2007 – Slightly Warmer and Drier than Normal, Only 3 Inches of Snow.

    Casper’s average monthly temperature was 47.5 degrees which was 1.8 degrees above normal.  A record high of 72 was tied on the 25th; the warmest reading for the month was 78 degrees on the 4th, 5th and 10th.  The coolest reading for the month was 23 degrees on the 15th, 16th and 31st.  The total precipitation was 1.08 inches which was 0.06 inches below normal.  Casper received 3.0 inches of snowfall which was only 42 percent of normal.  2.0 inches of snow fell on the 21st.

NOVEMBER 2007 – Second Driest on Record, Fourth Least Snowiest, Peak Wind Gust for 2007.

     Casper’s average monthly temperature was 35.6 degrees which was 3.6 degrees above normal.   New record highs were set of 68 degrees on the 9th and 67 degrees on the 19th.  The total precipitation was only 0.05 inches which was 0.77 inches below normal or only 6 percent of normal.  Total snowfall for the month of 0.8 inches was 11.2 inches below normal.  

     A peak wind gust of 63 mph was recorded on the 13th which was also the peak wind gust for 2007 at the airport.  These strong winds were part of a larger scale wind storm that swept across the state.
 

DECEMBER 2007 – Seventh Snowiest on Record

        Casper’s average monthly temperature was 20.9 degrees which was 2.9 degrees below normal. The highest temperature for the month was 55 degrees on the 4th and the coldest temperature was 2 below zero on the 14th.   The total precipitation was 0.74 inches which was  0.12 inches above normal.  16.1 inches of snowfall accumulated which was 135 percent of normal.    Two major snowstorms on December 7-8 and  December 23-25 brought most of this snowfall to the area.



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