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Posted by Jim Wilkins on February 16, 2012, 11:59 pm
 


That happens as far north as Pennsylvania. For New York and above a little
snow is a minor nuisance. We don't take well to the 100F heat with high
humidity when we are downwind of you, though. Luckily it's rare in NH, and
alternates with beautiful cool dry air from Canada. Canadian weather is less
welcome in winter.

My brother tells me the GA and SC highway departments have at least learned
to recognize pictures of snowplow trucks.

Watch the winter temps in Atlanta and Anchorage. Some years they aren't far
apart.

jsw



Posted by Curbie on February 17, 2012, 4:55 am
 
Here’s climate data for Atlanta, GA. Calculated from NREL’s TMY data
and PvWatts to help with both solar PV and thermal.

Curbie


Climate Data for: Atlanta, GA. Time Zone: -5
Fixed Parameters    Units    Notes    Values
Latitude & Longitude     °     5,11     33.65     -84.43
First & Last Frost Dates     Date     5,9     11/03     04/02
Growing Season     Days     5,9     215
Elevation     Ft.     5,11     1033
e-Rate     $     5,11     0.102

Yearly Parameters    Units    Notes    Values
Average Hours of Full Sun Per Day     Hours     8,11,12     4.7
Temperature, Ave, Max, Min     °F     8,9     61     97     12
Degree Days, Heating, Cooling, Growing     °F     1,2,3,8,9     3073
273     5212
Average Air Pressure     mbar     10     981
Average Wind Direction     °     4,10     199
Average Wind Speed     mph     10     8.8
Average Rainfall (Estimated)     In.     9     72.2
Total AC-kWh     kWh     5,11     1732
Ave. Daily Heat, Tilt, North, South, East, West     btu/ft2-d
7,8     1612     414     1017     849     840

Monthly Parameters    Units    Notes    Jan    Feb    Mar    Apr
May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Average Temperature     °F     8,9     41     44     53     61
70     76     79     77     73     62     51     44
Maximum Temperature     °F     8,9     66     72     77     86
88     93     97     91     86     90     73     70
Minimum Temperature     °F     8,9     16     12     30     30
54     59     57     61     57     37     27     18
Heating Degree Days     °F     1,8     747     582     370     168
16     0     0     0     0     135     406     649
Cooling Degree Days     °F     2,8     0     0     0     0
12     55     123     75     8     0     0     0
Growing Degree Days     °F     3,9     61     118     214     395
609     754     839     821     692     416     191     102
Average Air Pressure     mbar     10     983     981     979     980
978     982     981     981     981     980     982     981
Average Wind Direction     °     4,10     186     202     190     212
203     204     230     197     163     201     178     218
Average Wind Speed     mph     10     7.9     8.7     10.9     10.4
9.5     8.9     6.8     6.3     8.2     9.0     7.8     11.3
Average Rainfall (Estimated)     In.     9     8.5     10.6     6.3
4.0     5.3     1.9     7.1     2.7     6.0     3.9     5.0     10.9
Total AC-Watts     kWh     5,11     116     126     152     171     166
154     156     159     140     158     125     113
Average Daily Heat Tilted     btu/ft2-d     6,8     1203     1451
1621     1917     1848     1802     1806     1813     1623     1717     1382
1163
Average Daily Heat North Vertical Surface     btu/ft2-d     7,8
236     291     381     478     582     649     598     509     425
328     262     223
Average Daily Heat South Vertical Surface     btu/ft2-d     7,8
1123     1210     1113     988     767     685     715     882     999
1339     1257     1127
Average Daily Heat East Vertical Surface     btu/ft2-d     7,8
533     693     833     995     1086     1078     1159     1104     814
788     618     487
Average Daily Heat West Vertical Surface     btu/ft2-d     7,8
523     679     840     1145     1058     1104     947     933     893
855     603     506

Notes

[1] Number of heating degree days, 66°F base.
[2] Number of cooling degree days, 76°F base.
[3] Number of growing degree days, 50°F base, 86°F cap.
[4] No Wind = 0, East = 90°, South = 180°, West = 270°, North 360°
[5] Ac watts generated per kilowatt of photo-voltaic panels. (as
calculated by PvWatts)
[6] Solar heat generated on a surface, through a glazing, tilted at
latitude. (as calculated by PvWatts)
[7] Solar heat generated on vertical surface (no glazing) per day. (as
calculated by PvWatts)
[8] Helpful for evaluating solar-thermal energy (and domestic heating
and cooling).
[9] Helpful for evaluating bio-energy.
[10] Helpful for evaluating wind energy.
[11] Helpful for evaluating photo-voltaic energy.
[12] Helpful for evaluating solar energy.




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