Weather History for San Francisco, CA

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 82 °F 68 °F 64 °F
Mean Temperature 67 °F 61 °F 58 °F
Min Temperature 56 °F 53 °F 50 °F
Degree Days  
Heating Degree Days (base 65) 7 4 0 126
Cooling Degree Days (base 65) 2 0 0 2
Growing Degree Days (base 50) 17 10 7 309
Dew Point  
Dew Point 59 °F 50 °F 43 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 30 mph 12 mph 0 mph
Gust Wind 37 mph 25 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.14 in 29.99 in 29.83 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 04, 2012 Rise Set
Actual Time 6:42 AM PDT 7:33 PM PDT
Civil Twilight 6:16 AM PDT 7:59 PM PDT
Nautical Twilight 5:44 AM PDT 8:31 PM PDT
Astronomical Twilight 5:11 AM PDT 9:03 PM PDT
Moon 9:36 PM PDT (9/4) 10:48 AM PDT (9/4)
Length of Visible Light 13h 43m
Length of Day
12h 50m
Waning Gibbous, 83% of the Moon is Illuminated
Sep 4
Waning Gibbous
Sep 8
Last Quarter
Sep 15
New
Sep 22
First Quarter
Sep 29
Full

Weather History Calendar

Precipitation Actual month total 0.00 Normal Month Total: 0.17
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
68 | 53 0.00
Average:
74 | 56 0.00
Fog
Actual:
74 | 52 0.00
Average:
74 | 56 0.00
Scattered Clouds
Actual:
74 | 52 0.00
Average:
74 | 56 0.01
Scattered Clouds
Actual:
64 | 51 0.00
Average:
74 | 56 0.00
Partly Cloudy
Actual:
65 | 54 0.00
Average:
74 | 56 0.00
Partly Cloudy
Actual:
67 | 55 0.00
Average:
74 | 56 0.01
Scattered Clouds
Actual:
68 | 54 0.00
Average:
74 | 56 0.00
Scattered Clouds
Actual:
64 | 56 0.00
Average:
74 | 56 0.00
Partly Cloudy
Actual:
68 | 55 0.00
Average:
74 | 56 0.01
Scattered Clouds
Actual:
75 | 53 0.00
Average:
74 | 56 0.00
Scattered Clouds
Actual:
71 | 54 0.00
Average:
74 | 56 0.00
Partly Cloudy
Actual:
67 | 54 0.00
Average:
74 | 56 0.01
Partly Cloudy
Actual:
66 | 53 0.00
Average:
74 | 56 0.00
Partly Cloudy
Actual:
65 | 54 0.00
Average:
74 | 56 0.01
Partly Cloudy
Actual:
65 | 53 0.00
Average:
74 | 56 0.00
Partly Cloudy
Actual:
66 | 51 0.00
Average:
74 | 56 0.01
Partly Cloudy
Actual:
66 | 54 0.00
Average:
74 | 56 0.01
Partly Cloudy
Actual:
65 | 53 0.00
Average:
74 | 56 0.00
Partly Cloudy
Actual:
64 | 55 0.00
Average:
74 | 56 0.01
Partly Cloudy
Actual:
64 | 54 0.00
Average:
74 | 56 0.00
Partly Cloudy
Actual:
70 | 54 0.00
Average:
74 | 56 0.01
Scattered Clouds
Actual:
73 | 51 0.00
Average:
74 | 56 0.01
Fog
Actual:
71 | 50 0.00
Average:
74 | 55 0.00
Scattered Clouds
Actual:
68 | 51 0.00
Average:
73 | 55 0.01
Partly Cloudy
Actual:
68 | 52 0.00
Average:
73 | 55 0.01
Fog
Actual:
65 | 52 0.00
Average:
73 | 55 0.01
Partly Cloudy
Actual:
70 | 51 0.00
Average:
73 | 55 0.00
Fog
Actual:
69 | 52 0.00
Average:
73 | 55 0.01
Partly Cloudy
Actual:
67 | 53 0.00
Average:
73 | 55 0.02
Clear
Actual:
82 | 52 0.00
Average:
73 | 55 0.01
 

Calendar Legend

Sunny
Clear
Mostly Cloudy
Partly Sunny
Partly Cloudy
Mostly Sunny
Cloudy Rain Snow
Hail
Flurries
Thunderstorms Hazy
Fog
Sleet '?' denotes
'chance of'
Unknown

Daily Weather History & Observations

2012 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 68 61 53 52 49 48 89 69 49 30.06 30.01 29.98 10 10 10 22 11 25 0.00  
2 74 63 52 56 50 46 93 70 46 30.00 29.96 29.90 10 8 1 22 9 25 0.00 Fog
3 74 63 52 54 50 48 89 68 46 29.98 29.95 29.90 10 10 10 24 11 28 0.00  
4 64 58 51 52 50 48 89 75 60 30.04 30.00 29.97 10 10 10 26 14 31 0.00  
5 65 60 54 52 51 49 89 78 67 30.01 29.98 29.94 10 10 8 23 10 29 0.00  
6 67 61 55 52 50 48 86 69 52 30.04 29.99 29.96 10 10 10 28 12 33 0.00  
7 68 61 54 51 49 48 83 66 49 30.10 30.06 30.02 10 10 10 25 13 29 0.00  
8 64 60 56 50 49 48 83 70 56 30.09 30.04 29.99 10 10 10 28 17 32 0.00  
9 68 62 55 52 50 48 80 68 56 30.02 29.98 29.91 10 10 10 30 16 37 0.00  
10 75 64 53 54 51 48 89 68 47 29.95 29.90 29.83 10 10 9 23 9 26 0.00  
11 71 63 54 55 51 49 86 70 53 29.97 29.91 29.86 10 10 9 21 9 28 0.00  
12 67 61 54 54 53 50 93 78 63 30.08 30.03 29.97 10 10 8 22 10 28 0.00  
13 66 60 53 53 52 51 93 76 58 30.11 30.07 30.02 10 9 6 28 14 33 0.00  
14 65 60 54 52 51 50 93 77 60 30.12 30.08 30.03 10 10 9 26 16 31 0.00  
15 65 59 53 50 49 48 89 73 56 30.12 30.07 30.01 10 10 10 25 15 31 0.00  
16 66 59 51 51 49 48 89 75 60 30.06 30.02 29.98 10 10 10 25 12 29 0.00  
17 66 60 54 50 48 48 83 70 56 30.07 30.04 30.00 10 10 10 24 10 26 0.00  
18 65 59 53 52 48 46 80 68 56 30.13 30.09 30.05 10 10 10 24 15 30 0.00  
19 64 60 55 50 49 48 77 67 56 30.14 30.10 30.06 10 10 10 25 16 31 0.00  
20 64 59 54 49 48 47 83 70 56 30.09 30.05 30.00 10 10 10 28 17 33 0.00  
21 70 62 54 50 48 47 83 64 44 30.01 29.96 29.91 10 10 10 25 14 30 0.00  
22 73 62 51 54 49 46 83 64 44 29.94 29.91 29.86 10 10 9 25 9 30 0.00  
23 71 61 50 55 50 46 89 71 53 29.96 29.93 29.91 10 10 2 26 10 32 0.00 Fog
24 68 60 51 54 50 47 89 72 55 29.98 29.93 29.88 10 10 10 21 9 23 0.00  
25 68 60 52 54 51 47 89 74 59 29.94 29.90 29.86 10 9 6 23 9 28 0.00  
26 65 59 52 52 50 48 83 73 63 29.92 29.89 29.84 10 9 7 21 8 26 0.00 Fog
27 70 61 51 55 50 48 93 73 53 29.94 29.89 29.83 10 8 2 23 9 26 0.00  
28 69 61 52 53 51 49 93 78 63 29.98 29.93 29.88 10 10 8 20 10 24 0.00 Fog
29 67 60 53 55 51 48 86 72 58 30.05 30.01 29.98 10 8 2 22 8 26 0.00  
30 82 67 52 59 50 43 89 62 35 30.07 30.02 29.95 10 10 10 22 8 26 0.00