Annual Soil Swing, and Phase Constants for U.S. Cities*
Note: The 'Phase Constant' represents the coldest day of the year.
|
State
|
City |
Tm (oF) |
As(oF) |
To(Days) |
|
|
|
|
|
AL |
Birmingham |
65 |
19 |
31 |
|
Montgomery |
67 |
18 |
31 |
|
|
|
|
|
AZ |
Phoenix |
73 |
23 |
33 |
|
Tucson |
70 |
18 |
34 |
|
|
|
|
|
AR |
Little
Rock |
64 |
21 |
32 |
|
|
|
|
|
CA |
Los
Angeles |
64 |
7 |
54 |
|
Merced |
68 |
25 |
33 |
|
San Diego |
64 |
7 |
54 |
|
|
|
|
|
CO |
Colorado
Springs |
51 |
21 |
36 |
|
Denver |
52 |
22 |
37 |
|
Grand
Junction |
55 |
25 |
32 |
|
|
|
|
|
DC |
Washington |
57 |
22 |
36 |
|
|
|
|
|
FL |
Appalachico. |
70 |
15 |
36 |
|
Jacksonville |
71 |
14 |
32 |
|
|
|
|
|
GA |
Atlanta |
62 |
19 |
32 |
|
Augusta |
65 |
18 |
30 |
|
Macon |
67 |
17 |
33 |
|
|
|
|
|
ID |
Boise |
53 |
21 |
34 |
|
Idaho
Falls |
46 |
23 |
34 |
|
|
|
|
|
IL |
Chicago |
51 |
25 |
37 |
|
E. St.
Louis |
57 |
24 |
34 |
|
Urbana |
53 |
26 |
35 |
|
|
|
|
|
State |
City |
Tm (oF) |
As(oF) |
To(Days) |
|
|
|
|
|
IN |
Fort
Wayne |
53 |
24 |
35 |
|
Indianapolis |
55 |
24 |
34 |
|
South
Bend |
52 |
25 |
37 |
|
|
|
|
|
IA |
Des
Moines |
52 |
28 |
35 |
|
Sioux
City |
51 |
29 |
34 |
|
|
|
|
|
KS |
Dodge
City |
57 |
25 |
35 |
|
Topeka |
56 |
26 |
35 |
|
|
|
|
|
KY |
Louisville |
60 |
22 |
33 |
|
|
|
|
|
LA |
Lake
Charles |
70 |
16 |
32 |
|
New
Orleans |
70 |
15 |
32 |
|
Shreveport |
66 |
19 |
32 |
|
|
|
|
|
MA |
Portland |
48 |
22 |
39 |
|
|
|
|
|
MS |
Plymouth |
51 |
21 |
43 |
|
|
|
|
|
MI |
Battle
Creek |
50 |
24 |
35 |
|
Detroit |
50 |
25 |
39 |
|
Sau St.
Marie |
42 |
26 |
40 |
|
|
|
|
|
MN |
Duluth |
41 |
28 |
37 |
|
Int.
Falls |
39 |
31 |
34 |
|
Minneapolis |
47 |
29 |
35 |
|
|
|
|
|
MS |
Biloxi |
70 |
17 |
32 |
|
Columbus |
65 |
19 |
32 |
|
Jackson |
67 |
18 |
31 |
|
|
|
|
|
MO |
Columbia |
57 |
24 |
35 |
|
Kansas
City |
58 |
26 |
35 |
|
Springfield |
58 |
23 |
34 |
|
|
|
|
|
State |
City |
Tm (oF) |
As(oF) |
To(Days) |
|
|
|
|
|
MT |
Billings |
49 |
23 |
37 |
|
Great
Falls |
48 |
23 |
36 |
|
Missoula |
46 |
21 |
32 |
|
|
|
|
|
NB |
Grand
Junction |
52 |
27 |
35 |
|
Lincoln |
53 |
28 |
34 |
|
N. Platte |
51 |
26 |
35 |
|
|
|
|
|
NV |
Ely |
47 |
22 |
35 |
|
Las Vegas |
69 |
23 |
32 |
|
Winnemucca |
52 |
22 |
33 |
|
|
|
|
|
NJ |
Trenton |
55 |
22 |
38 |
|
|
|
|
|
NM |
Albuquerque |
59 |
22 |
31 |
|
Roswell |
63 |
22 |
30 |
|
|
|
|
|
NY |
Albany |
50 |
25 |
38 |
|
Binghamton |
48 |
24 |
38 |
|
Niagara
Falls |
50 |
24 |
24 |
|
Syracuse |
50 |
24 |
38 |
|
|
|
|
|
NC |
New Bern |
65 |
17 |
35 |
|
Greensboro |
60 |
20 |
31 |
|
|
|
|
|
ND |
Bismark |
44 |
31 |
33 |
|
Grand
Forks |
42 |
33 |
35 |
|
Williston |
45 |
29 |
34 |
|
|
|
|
|
OH |
Akron |
52 |
23 |
37 |
|
Columbus |
55 |
22 |
34 |
|
Dayton |
56 |
24 |
35 |
|
Toledo |
51 |
25 |
36 |
|
|
|
|
|
State |
City |
Tm (oF) |
As(oF) |
To(Days) |
|
|
|
|
|
OK |
Altus |
65 |
24 |
33 |
|
Oklahoma
City |
62 |
23 |
34 |
|
Tulsa |
62 |
23 |
34 |
|
|
|
|
|
OR |
Astoria |
53 |
9 |
45 |
|
Medford |
55 |
17 |
34 |
|
Portland |
54 |
13 |
37 |
|
|
|
|
|
PA |
Middletown |
55 |
23 |
35 |
|
Philadelphia |
55 |
22 |
34 |
|
Pittsburg |
52 |
23 |
36 |
|
Wilkes-Barre |
52 |
23 |
36 |
|
|
|
|
|
SC |
Charleston |
66 |
16 |
32 |
|
Greenville |
62 |
19 |
33 |
|
Sumpter |
65 |
18 |
32 |
|
|
|
|
|
SD |
Huron |
47 |
30 |
35 |
|
Rapid
City |
50 |
25 |
38 |
|
|
|
|
|
TN |
Bristol |
59 |
20 |
32 |
|
Knoxville |
61 |
21 |
31 |
|
Memphis |
63 |
21 |
32 |
|
Nashville |
60 |
21 |
32 |
|
|
|
|
|
TX |
El Paso |
66 |
20 |
28 |
|
Ft. Worth |
68 |
21 |
34 |
|
Houston |
71 |
16 |
33 |
|
San
Antonio |
72 |
16 |
32 |
|
|
|
|
|
UT |
Salt Lake
City |
53 |
24 |
35 |
|
|
|
|
|
VT |
Burlington |
46 |
26 |
37 |
|
|
|
|
|
State |
City |
Tm (oF) |
As(oF) |
To(Days) |
|
|
|
|
|
VA |
Norfolk |
61 |
20 |
37 |
|
Richmond |
60 |
19 |
33 |
|
Roanoke |
59 |
20 |
33 |
|
|
|
|
|
WA |
Moses
Lake |
53 |
23 |
29 |
|
Seattle |
53 |
12 |
36 |
|
Spokane |
49 |
21 |
32 |
|
|
|
|
|
WV |
Charleston |
58 |
20 |
33 |
|
Elkins |
52 |
20 |
32 |
|
|
|
|
|
WI |
Green Bay |
46 |
26 |
37 |
|
Madison |
49 |
27 |
36 |
|
|
|
|
|
WY |
Casper |
49 |
24 |
37 |
|
Cheyenne |
48 |
21 |
39 |
|
Lander |
46 |
24 |
38 |
|
Sheridan |
48 |
24 |
35 |
*Adapted from Closed-Loop/Ground-Source Heat Pump Systems Installation Guide. NRECA Research Project 86-1. Oklahoma State University. 1988. and Perry, Robert H. and Chilton, Cecil H. Chemical Engineer's Handbook. 5th Ed. New York, McGraw Hill Book Company, 1973. |