Weather History for KSFO - September, 2013

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Month of September, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 88 °F 74 °F 66 °F
Mean Temperature 73 °F 66 °F 62 °F
Min Temperature 62 °F 57 °F 53 °F
Degree Days  
Heating Degree Days (base 65) 3 1 0 18
Cooling Degree Days (base 65) 8 1 0 41
Growing Degree Days (base 50) 22 15 10 461
Dew Point  
Dew Point 64 °F 53 °F 34 °F
Precipitation  
Precipitation 0.23 in 0.01 in 0.00 in 0.23 in
Snowdepth - - - -
Wind  
Wind 39 mph 12 mph 0 mph
Gust Wind 51 mph 26 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.11 in 29.92 in 29.72 in

Monthly Weather History Graph

Monthly Weather History Graph

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Astronomy

Sep. 30, 2013 Rise Set
Actual Time 7:04 AM PDT 6:53 PM PDT
Civil Twilight 6:38 AM PDT 7:19 PM PDT
Nautical Twilight 6:07 AM PDT 7:49 PM PDT
Astronomical Twilight 5:37 AM PDT 8:20 PM PDT
Moon 2:50 AM PDT (9/30) 4:23 PM PDT (9/30)
Length of Visible Light 12h 41m
Length of Day
11h 49m
Waning Crescent, 18% of the Moon is Illuminated
Sep 30
Waning Crescent
Oct 4
New
Oct 11
First Quarter
Oct 18
Full
Oct 26
Last Quarter

Daily Weather History & Observations

2013 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 74 66 58 60 56 53 87 68 49 29.96 29.93 29.91 10 10 10 25 13 29 0.00  
2 75 69 62 61 60 58 93 77 61 29.97 29.94 29.90 10 10 6 23 12 30 0.00  
3 73 67 60 59 56 51 84 65 46 30.02 29.98 29.95 10 10 10 24 15 31 0.00  
4 74 68 61 59 57 56 90 72 53 30.05 30.01 29.97 10 10 10 29 19 35 0.00  
5 72 66 60 57 56 54 90 74 57 30.04 30.00 29.97 10 10 10 31 21 37 0.00  
6 85 71 56 57 51 45 86 58 29 30.00 29.92 29.83 10 10 10 24 8 28 0.00  
7 88 73 58 64 54 46 86 59 31 29.88 29.85 29.81 10 10 10 21 8 25 0.00  
8 74 65 56 58 54 52 86 70 53 29.88 29.83 29.76 10 10 10 26 11 31 0.00  
9 76 66 55 58 55 52 90 70 50 29.82 29.77 29.72 10 10 10 26 11 30 0.00  
10 74 66 57 59 56 54 93 73 53 29.91 29.82 29.76 10 10 10 17 8 21 0.00  
11 74 68 62 57 55 54 78 68 57 30.00 29.97 29.91 10 10 10 18 9 23 0.00  
12 71 65 59 58 57 55 84 73 61 29.99 29.95 29.91 10 10 9 25 11 30 0.00 Fog
13 66 62 57 55 54 54 93 80 67 29.92 29.87 29.80 10 10 7 30 15 37 0.00  
14 66 62 57 55 54 53 87 77 67 29.86 29.81 29.77 10 10 9 25 16 33 0.00  
15 73 66 58 59 55 52 90 72 53 29.88 29.85 29.81 10 10 6 23 13 26 0.00  
16 71 65 59 58 55 53 90 74 57 29.91 29.87 29.81 10 10 6 31 16 39 0.00  
17 68 63 57 55 53 50 86 72 58 29.91 29.87 29.84 10 10 10 39 22 51 0.00  
18 78 66 54 55 49 47 78 60 41 29.92 29.88 29.85 10 10 10 25 10 30 0.00  
19 80 67 54 56 50 46 77 58 38 29.87 29.82 29.76 10 10 10 26 10 33 0.00  
20 73 65 56 59 56 50 87 70 53 29.88 29.84 29.79 10 10 9 17 10 23 0.00  
21 68 63 58 59 56 53 90 75 59 29.91 29.85 29.82 10 9 2 24 12 28 0.23 Rain
22 70 63 55 55 53 49 93 70 47 30.02 29.97 29.92 10 10 10 29 10 35 0.00  
23 78 68 57 58 54 50 78 64 50 30.03 29.99 29.95 10 10 10 24 9 30 0.00  
24 71 65 58 54 52 50 78 66 53 30.01 29.97 29.93 10 10 10 36 19 43 0.00  
25 67 62 56 51 47 45 83 64 45 29.95 29.91 29.84 10 10 10 35 20 45 0.00  
26 71 62 53 46 43 38 72 53 33 29.99 29.92 29.85 10 10 10 24 11 29 0.00  
27 78 66 54 47 41 34 67 46 25 30.11 30.06 30.00 10 10 10 23 7 28 0.00  
28 78 66 53 55 48 38 84 60 35 30.10 30.06 30.02 10 10 10 28 9 32 0.00  
29 75 66 57 59 56 53 87 70 53 30.11 30.09 30.06 10 10 10 16 7 21 0.00  
30 73 66 59 60 57 43 87 69 51 30.07 30.03 29.98 10 10 10 22 10 26 T Fog