Highlands

1971-2000 Climate Normals

Station: 090219 - Alpharetta 4 Ssw
Station type: COOP - TP what is this?
City, State: Roswell, GA       County: Fulton County
Latitude: 34.101° N      Longitude: 84.351° W
Elevation: 1138 feet above sea level
Climate division: GA02 - North Central
River basin: Upper Chattahoochee
Supported by: NOAA National Weather Service

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Monthly Normals
090219 - Alpharetta 4 Ssw (COOP)
Roswell, GA       Fulton County
34.101N    -84.351W

Jan Feb Mar Apr May June Jul Aug Sept Oct Nov Dec Ann.
What is This? Normal Monthly Maximum Temperature49.9 °F 55.2 °F 63.3 °F 71.3 °F 77.9 °F 84.3 °F 87.5 °F 86.3 °F 81.1 °F 71.8 °F 62.4 °F 53.4 °F 70.4 °F
What is This? Normal Monthly Minimum Temperature29.1 °F 31.9 °F 38.3 °F 45.3 °F 54.4 °F 62 °F 66.8 °F 66.1 °F 60 °F 47.2 °F 38.6 °F 31.6 °F 47.6 °F
What is This? Normal Monthly Mean Temperatures39.5 °F 43.6 °F 50.8 °F 58.3 °F 66.2 °F 73.2 °F 77.2 °F 76.2 °F 70.6 °F 59.5 °F 50.5 °F 42.5 °F 59 °F
What is This? Normal Monthly Precipitation5.34 in. 4.78 in. 5.52 in. 4.04 in. 4.63 in. 3.66 in. 4.17 in. 4.32 in. 3.87 in. 3.58 in. 3.73 in. 4.18 in. 51.8 in.
What is This? Normal Cooling Degree Days0 0 6 17 109 251 377 348 183 30 6 0 1327
What is This? Normal Heating Degree Days790 600 446 218 73 7 0 0 17 201 440 698 3490
What is This? Highest Mean Temperature49.9 °F 53.4 °F 57.1 °F 63.7 °F 70.4 °F 76.6 °F 81.4 °F 80 °F 74.8 °F 64.9 °F 58.7 °F 49.6 °F 81.4 °F
What is This? Median Monthly Mean Temperature38.6 °F 43.6 °F 50.7 °F 58 °F 65.8 °F 73.5 °F 77.5 °F 75.7 °F 70.7 °F 59.7 °F 50.2 °F 41.6 °F 58.7 °F
What is This? Lowest Mean Temperature27.2 °F 34.6 °F 43.6 °F 52.9 °F 61.7 °F 68.5 °F 74 °F 73.3 °F 67.7 °F 54 °F 42.8 °F 35.2 °F 27.2 °F
What is This? Year of Highest Mean Temperature1974 1990 1997 1981 1998 1981 1986 1990 1998 1984 1985 1984 1986
What is This? Year of Lowest Mean Temperature1977 1978 1971 1983 1973 1974 1988 1992 1982 1987 1976 2000 1977



Official daily normals are calculated by the National Climatic Data Center using a linear interpolation of the monthly normals. Since the daily normals do not account for daily climate variability, the State Climate Office of North Carolina provides a daily normal 'range' that incorporates the historical variations in climate for any given day. More details on this technique are available in:

Holder, C., R. Boyles, P. Robinson, S. Raman, and G. Fishel (2006). Calculating a Daily Normal Temperature Range that Reflects Daily Temperature Variability. Bulletin of the American Meteorological Society, Vol. 87, pp 769-774.

Normal Daily Maximum Temperature
The 30-year normal value for maximum temperatures each day.
090219 - Alpharetta 4 Ssw (COOP)
Roswell, GA       Fulton County
34.101N    -84.351W

show/hide Normal Daily Maximum Temperature Table



Normal Daily Minimum Temperature
The 30-year normal value for minimum temperatures each day.
090219 - Alpharetta 4 Ssw (COOP)
Roswell, GA       Fulton County
34.101N    -84.351W

show/hide Normal Daily Minimum Temperature Table



Normal Daily Mean Temperature
The 30-year normal value for mean temperatures for each day.
090219 - Alpharetta 4 Ssw (COOP)
Roswell, GA       Fulton County
34.101N    -84.351W

show/hide Normal Daily Mean Temperature Table



Normal Precipitation by Day

090219 - Alpharetta 4 Ssw (COOP)
Roswell, GA       Fulton County
34.101N    -84.351W

show/hide Normal Daily Precipitation Table

Normal Cooling Degree Days (CDD) by Day
The 30-year normal value for cooling degree days for each day. Base 65 F
090219 - Alpharetta 4 Ssw (COOP)
Roswell, GA       Fulton County
34.101N    -84.351W

show/hide Normal Daily Cooling Degree Days Table

Normal Heating Degree Days (HDD) by Day
The 30-year normal value for heating degree days for each day. Base 65 F
090219 - Alpharetta 4 Ssw (COOP)
Roswell, GA       Fulton County
34.101N    -84.351W

show/hide Normal Daily Heating Degree Days Table