| San Francisco C.O. Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature |
10.6 |
12.4 |
12.7 |
13.3 |
13.7 |
14.7 |
15.1 |
15.6 |
16.8 |
16.7 |
14.0 |
10.9 |
13.9 |
| Avg. Max Temperature |
13.5 |
15.6 |
16.0 |
16.7 |
17.1 |
17.8 |
18.1 |
18.7 |
20.4 |
20.4 |
17.1 |
13.6 |
17.1 |
| Avg. Min Temperature |
7.7 |
9.3 |
9.4 |
9.9 |
10.3 |
11.4 |
11.9 |
12.6 |
13.3 |
12.9 |
10.9 |
8.3 |
10.7 |
| Days with Max Temp of 32 C or Higher |
0.0 |
0.0 |
0.0 |
< 0.5 |
< 0.5 |
< 0.5 |
< 0.5 |
< 0.5 |
1.0 |
< 0.5 |
0.0 |
0.0 |
1.0 |
| Days with Min Temp Below Freezing |
< 0.5 |
< 0.5 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
< 0.5 |
0.0 |
| | |
| San Francisco C.O. Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days |
431 |
297 |
313 |
275 |
260 |
198 |
187 |
156 |
116 |
123 |
237 |
412 |
3005 |
| Cooling Degree Days |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
35.0 |
30.0 |
0.0 |
0.0 |
65.0 |
| | |
| San Francisco C.O. Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) |
4.1 |
3.0 |
3.1 |
1.3 |
0.2 |
0.1 |
0.0 |
0.1 |
0.3 |
1.3 |
3.2 |
3.1 |
19.7 |
| Days with Precipitation 0.01 inch or More |
11.0 |
10.0 |
11.0 |
6.0 |
3.0 |
1.0 |
< 0.5 |
1.0 |
2.0 |
4.0 |
8.0 |
10.0 |
68.0 |
| Monthly Snowfall (inches) |
< 0.05 |
< 0.05 |
< 0.05 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
< 0.05 |
0.0 |
| | |
| Other San Francisco C.O. Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed |
6.7 |
7.5 |
8.5 |
9.5 |
10.4 |
10.9 |
11.2 |
10.5 |
9.1 |
7.6 |
6.3 |
6.5 |
8.7 |
| Percent of Possible Sunshine |
56.0 |
62.0 |
69.0 |
73.0 |
72.0 |
73.0 |
66.0 |
65.0 |
72.0 |
70.0 |
62.0 |
53.0 |
66.0 |
| Avg. Relative Humidity |
44.5 |
73.0 |
71.5 |
71.5 |
74.5 |
73.0 |
71.5 |
72.5 |
69.5 |
64.0 |
61.5 |
62.0 |
66.5 |
United States
