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Phoenix Weather History

 

Month

 

Historical Average Temperature

2007

2008

Average Temperature

Cooling Degree Days*

Heating Degree Days*

Average Temperature

Cooling Degree Days*

Heating Degree Days*

Jan

56

53

0

363

55

0

313

Feb

58

60

11

151

58

11

201

Mar

62

69

177

53

67

108

84

Apr

70

74

277

7

74

227

0

May

79

85

615

0

79

429

3

Jun

88

93

839

0

93

852

0

Jul

93

96

963

0

95

935

0

Aug

91

96

973

0

93

873

0

Sep

86

90

768

0

90

752

0

Oct

75

78

419

0

67

104

34

Nov

76

70

189

48

 

 

 

Dec

54

53

0

360

 

 

 

Avg Temp

74

76

 

 

77

 

 


* A cooling degree day is a standard index established by the federal government and is the number of degrees the average temperature for the day is above 65 degrees. For example, if the daily high is 87 and the low is 47, the average temperature for the day is 67 and counts as 2 cooling degree days. Likewise a average temperature of 63 would count as 2 heating degree days. The more degree days there are the more energy is required for heating and cooling.