OK17 Coop Summary

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Cooperative Observer Station Summary

CHICKASHA EXP STN (341750)
*

GRADY County

Climate Division: 5
*

Latitude: 3503N;     Longitude: 09755W

Elevation: 1084 ft
*

Precipitation Period of Record:

1953/06-2010/10 ( 98%)
*

Temperature Period of Record:

1953/06-2010/10 ( 99%)

 

Monthly Averages (1971-2000)

 

Temperature (deg Fahrenheit)

Precipitation (inches)

Snowfall and Sleet (inches)

 

Daily Max

Daily Min

Daily Avg

Monthly Average

Monthly Average

January

50.1
25.8
37.8
1.32
1.5

February

57.1
30.6
43.6
1.80
1.4

March

65.9
39.3
52.3
2.83
.2

April

75.3
48.3
61.5
3.62
.0

May

82.5
58.5
70.3
5.24
.0

June

90.3
67.1
78.4
4.11
.0

July

95.5
70.8
82.9
2.11
.0

August

94.2
69.1
81.4
2.73
.0

September
87.1
61.2
73.9
3.60
.0

October

76.7
49.7
62.9
3.88
.0

November

62.7
37.8
50.0
2.13
.1

December

52.7
28.9
40.6
1.96
.7

Annual

74.5
49.2
61.6
35.06
3.7

Average Number of Days Per Month (1971-2000)

 

Temperature

Precipitation

Snowfall and Sleet

 

Max>100

Max>90

Max<32

Min<32

Min<0

any

meas

0.10"+

0.25"+

0.50"+

1.00"+

any

meas

0.50"+

1.00"+

Glazing

Jan
0
0
3
24
*
5
4
3
2
1
*
1
1
1
1
1

Feb
0
*
2
16
*
6
5
3
2
1
*
1
*
*
*
1

Mar
0
*
*
8
0
7
6
5
3
2
1
*
*
*
*
*

Apr
*
1
0
1
0
8
7
5
4
2
1
0
0
0
0
0

May
*
6
0
0
0
9
9
7
5
4
2
0
0
0
0
0

Jun
2
18
0
0
0
8
7
6
4
3
1
0
0
0
0
0

Jul
8
26
0
0
0
5
5
3
2
1
1
0
0
0
0
0

Aug
5
25
0
0
0
6
6
5
3
2
1
0
0
0
0
0

Sep
2
13
0
0
0
7
7
5
4
3
1
0
0
0
0
0

Oct
*
2
0
1
0
6
6
5
3
2
1
*
*
*
*
*

Nov
0
0
*
10
0
6
6
4
3
2
1
*
*
*
*
*

Dec
0
0
2
20
*
6
5
3
2
1
1
1
*
*
*
1

Ann
17
91
7
79
*
80
71
53
36
24
11
3
2
2
1
3

Exceedence Values (2 in 10 years)

Month

Maximum Temperature Higher Than:

Minimum Temperature Lower Than:

Precipitation Less Than:

Precipitation Greater Than:

January

74
3
.23
2.11

February

81
9
.64
2.55

March

90
15
1.09
3.42

April

93
27
1.68
4.68

May

98
39
2.28
7.78

June

102
52
2.00
6.08

July

107
58
.55
3.74

August

106
54
1.36
4.60

September
101
40
1.59
5.65

October

94
30
1.39
5.12

November

83
17
.52
3.47

December

75
5
.47
2.49

Annual

108
0
25.78
40.22

Monthly Extremes

 

Temperature (F) (1953-2010)

Precipitation (inches) (1953-2010)

Snowfall (1953-2010)

 

Record High

Record Low

Monthly Max

Daily Max

Monthly Max

Daily Max

Greatest Depth

Jan
85
(24th, 1967)
-11
( 8th, 1988)
4.65" (1998)
3.06" ( 4th, 1998)
9.0" (1995)
6.0" ( 7th, 1973)
6.0" ( 7th, 1973)

Feb
90
(22nd, 1996)
-3
( 4th, 1996)
4.93" (1990)
2.30" (17th, 2008)
18.5" (1978)
9.0" ( 7th, 1979)
4.0" (14th, 1968)

Mar
95
(11th, 1967)
6
( 2nd, 1980)
7.75" (1985)
3.34" (31st, 2007)
6.0" (1995)
5.5" (13th, 1958)
2.0" (23rd, 2006)

Apr
102
(12th, 1972)
19
( 7th, 1971)
9.30" (1992)
6.29" (17th, 1992)
.0" (1955)
.0" ( 6th, 1955)
.0" -

May
107
(30th, 1985)
29
( 1st, 1960)
11.45" (1982)
6.62" (27th, 1987)
.0" -
.0" -
.0" -

Jun
112
(27th, 1980)
46
( 4th, 1954)
16.44" (2007)
3.06" ( 9th, 1979)
.0" -
.0" -
.0" -

Jul
111
( 2nd, 1980)
52
(23rd, 1970)
9.85" (1975)
3.00" (22nd, 1961)
.0" -
.0" -
.0" -

Aug
107
(15th, 1956)
48
(26th, 1962)
8.25" (1966)
6.08" (19th, 2007)
.0" -
.0" -
.0" -

Sep
110
( 3rd, 2000)
33
(30th, 1984)
9.88" (1991)
5.21" (25th, 1959)
.0" -
.0" -
.0" -

Oct
103
( 1st, 1977)
14
(31st, 1993)
13.27" (1983)
7.30" (20th, 1983)
1.0" (1993)
1.0" (30th, 1993)
.0" -

Nov
89
( 9th, 1980)
5
(29th, 1976)
6.68" (2004)
2.24" ( 3rd, 1964)
8.0" (2001)
4.0" (28th, 2001)
.0" -

Dec
85
(24th, 1955)
-12
(23rd, 1989)
8.09" (1984)
3.18" (31st, 1984)
8.0" (2009)
7.0" (25th, 1975)
7.0" (25th, 2009)

Annual
112
(Jun 27, 1980)
-12
(Dec 23, 1989)
16.44" (Jun 2007)
7.30" (Oct 20, 1983)
18.5" (Feb 1978)
9.0" (Feb 7, 1979)
7.0" (Dec 25, 2009)

First Freezing Temperature in Fall

Probability

24 F or Lower

28 F or Lower

32 F or Lower

1 Year in 10

November   3
October  28
October  17

2 Years in 10
November   9
November   2
October  20

5 Years in 10
November  21
November  10
October  28

Last Freezing Temperature in Spring

Probability

24 F or Lower

28 F or Lower

32 F or Lower

1 Year in 10

April   2
April  13
April  18

2 Years in 10
March  26
April   7
April  14

5 Years in 10
March  14
March  25
April   5

Number of Days in Growing Season

Probability

Higher Than 24 F

Higher Than 28 F

Higher Than 32 F

9 Years in 10
224
210
192

8 Years in 10
237
217
195

5 Years in 10
250
233
209

2 Years in 10
272
247
221

1 Year in 10

284
263
231

Precipitation Quantiles (Inches)

PERCENT

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

ANNUAL

MEAN
1.32
1.80
2.83
3.62
5.24
4.11
2.11
2.73
3.60
3.88
2.13
1.96
35.06

10%
.11
.37
.64
.70
1.52
1.41
.40
.75
.86
.80
.14
.26
24.47

20%
.23
.64
1.09
1.68
2.28
2.00
.55
1.36
1.59
1.39
.52
.47
25.78

30%
.44
.76
1.43
2.23
2.51
2.25
.99
1.72
2.54
1.70
.89
.74
27.91

40%
.77
1.02
1.95
2.44
3.17
2.63
1.49
2.30
2.76
2.10
.98
.98
29.83

50%
1.17
1.33
2.18
3.28
4.49
3.71
1.63
2.79
3.31
2.44
1.41
1.21
33.22

60%
1.49
1.60
2.65
3.69
5.59
3.99
2.46
3.44
3.87
2.99
1.83
1.67
34.15

70%
1.91
1.93
2.85
4.45
6.80
5.74
3.11
3.75
5.01
4.70
2.50
2.08
37.59

80%
2.11
2.55
3.42
4.68
7.78
6.08
3.74
4.60
5.65
5.12
3.47
2.49
40.22

90%
2.66
3.65
6.25
5.90
9.62
7.30
6.01
6.40
7.09
7.85
4.73
3.57
43.52