Weather History for Petaluma, CA

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Week of September 15, 2013 through September 21, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 87 °F 78 °F 69 °F
Mean Temperature 66 °F 63 °F 60 °F
Min Temperature 53 °F 49 °F 44 °F
Degree Days  
Heating Degree Days (base 65) 6 2 0 14
Cooling Degree Days (base 65) 2 0 0 2
Growing Degree Days (base 50) 16 13 10 93
Dew Point  
Dew Point 63 °F 53 °F 41 °F
Precipitation  
Precipitation 0.36 in 0.05 in 0.00 in 0.36 in
Snowdepth - - - -
Wind  
Wind 23 mph 5 mph 0 mph
Gust Wind 32 mph 20 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 29.94 in 29.85 in 29.78 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Sep. 15, 2013 Rise Set
Actual Time 6:52 AM PDT 7:17 PM PDT
Civil Twilight 6:25 AM PDT 7:44 PM PDT
Nautical Twilight 5:54 AM PDT 8:15 PM PDT
Astronomical Twilight 5:22 AM PDT 8:47 PM PDT
Moon 4:47 PM PDT (9/15) 2:39 AM PDT (9/15)
Length of Visible Light 13h 18m
Length of Day
12h 25m
Waxing Gibbous, 83% of the Moon is Illuminated
Sep 15
Waxing Gibbous
Sep 19
Full
Sep 26
Last Quarter
Oct 4
New
Oct 11
First 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  
15 75 64 53 61 56 54 100 82 50 29.88 29.85 29.80 10 10 5 17 6 23 0.00  
16 82 66 51 59 55 52 100 78 39 29.92 29.86 29.80 10 9 0 15 5 20 0.00  
17 75 62 50 55 52 48 100 72 47 29.91 29.86 29.83 10 10 10 23 8 32 0.00  
18 82 65 48 50 47 41 94 62 23 29.94 29.89 29.84 10 10 7 16 4 21 0.00  
19 87 66 44 50 47 41 100 67 22 29.89 29.84 29.78 10 10 9 13 2 18 0.00  
20 75 60 44 61 54 45 100 81 53 29.87 29.83 29.80 10 10 2 21 4 28 0.00  
21 69 60 51 63 57 52 100 89 56 29.92 29.85 29.82 10 9 2 20 5 25 0.36