Weather report

Please use the weather information below to better understand fluctuations in your heating and cooling costs.

The following report uses data collected at Sky Harbor International Airport in Phoenix by the National Oceanic and Atmospheric Administration (NOAA).

Summary for January 2010

Average high temperature    67
Average low temperature    45
Average daily temperature    57
Average dew point    32
Cooling degree hours (base 75°)    0
Heating degree hours (base 65°)    6,593
Cooling degree days (base 65°)    0
Heating degree days (base 65°)    258

Historical summary for January

  Cooling
degree
hours
(base 75°)
Heating
degree
hours
(base 65°)
2010 0 6,593
2009 84 5,990
2008 0 7,864
10 year
average
42 7,016

Monthly history

  2010 2009 2008 10 year avg.
Degree hours Heating Cooling Heating Cooling Heating Cooling Heating Cooling
January 6,59305,990847,86407,01642
February 1,34204,7403016,0581124,736108
March   1,9188982,5301,0192,452966
April   1,3342,3717062,6267852,243
May   09,1585535,049806,930
June   2010,121013,710211,494
July   017,244014,735014,173
August   015,153013,367012,567
September   32510,696010,503329,358
October   1,1412,8437604,3523943,459
November   2,4421,0282,2337652,329677
December   8,83807,77957,3838
Year
total
7,935 0 26,748 69,897 28,483 66,243 25,209 62,025

Monthly detail

Jan 2010
Dec 2009
Nov 2009
Oct 2009
Sep 2009
Aug 2009
Jul 2009
Jun 2009
May 2009
Apr 2009
Mar 2009
Feb 2009

Definitions

  • Degree hour: The difference between a base temperature of 65°F (heating), 75°F (cooling), and the average ambient air temperature for the hour. If the average ambient air temperature for the hour falls below 65°F the degree hour is recorded as a heating degree hour. A cooling degree hour is recorded if the average air temperature for the hour rises above 75°F.
  • Degree day: The difference between a base temperature of 65°F (heating and cooling) and the average ambient air temperature for the day. If the average ambient air temperature for the day falls below 65°F, the degree day is recorded as a heating degree day. A cooling degree day is recorded if the average air temperature for the day rises above 65°F.
  • Base 75: Used in calculating the degree hours based on an outside air temperature of 75°F.
  • Base 65: Used in calculating the degree hours based on an outside air temperature of 65°F.
  • Dew point: The temperature to which air must be cooled in order to reach saturation (assuming air pressure and moisture content are constant).

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If you have questions or problems with this service, please click here to contact us or call (602) 236-8858 . Technical Support is available to help you Monday through Friday, 8:30 a.m. to 5 p.m., excluding holidays. If you contact us outside of those hours, we will reply to all messages in the order in which they were received. Thank you.

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