Weather History for Petaluma, CA

Month of December, 2012 — View Current Weather Conditions
Month of December, 2012
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Daily Weekly Monthly Custom
  Max Avg Min Sum
Temperature
Max Temperature 66 °F 55 °F 46 °F
Mean Temperature 58 °F 46 °F 37 °F
Min Temperature 55 °F 37 °F 26 °F
Degree Days
Heating Degree Days (base 65) 28 19 6 589
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 8 1 0 25
Dew Point
Dew Point 61 °F 42 °F 25 °F
Precipitation
Precipitation 1.11 in 0.18 in 0.00 in 5.72 in
Snowdepth - - - -
Wind
Wind 29 mph 4 mph 0 mph
Gust Wind 41 mph 20 mph 16 mph
Sea Level Pressure
Sea Level Pressure 30.34 in 30.06 in 29.72 in
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Date:
Astronomy
Dec. 11, 2012 Rise Set
Actual Time 7:17 AM PST 4:50 PM PST
Civil Twilight 6:47 AM PST 5:19 PM PST
Nautical Twilight 6:14 AM PST 5:53 PM PST
Astronomical Twilight 5:42 AM PST 6:25 PM PST
Moon 5:19 AM PST (12/11) 3:33 PM PST (12/11)
Length Of Visible Light 10h 32m
Length of Day
9h 32m
Waning Crescent, 4% of the Moon is Illuminated
Dec 11
Waning Crescent
Dec 13
New
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter
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Monthly Calendar Weather History Overview
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Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
1 Overcast
Actual: 62 | 55
Precip: 0.33
Average: - | -
Precip: -
2 Partly Cloudy
Actual: 62 | 42
Precip: 1.11
Average: - | -
Precip: -
3 Partly Cloudy
Actual: 59 | 37
Precip: 0.00
Average: - | -
Precip: -
4 Mostly Cloudy
Actual: 57 | 48
Precip: 0.16
Average: - | -
Precip: -
5 Overcast
Actual: 59 | 55
Precip: 0.27
Average: - | -
Precip: -
6 Partly Cloudy
Actual: 59 | 41
Precip: 0.00
Average: - | -
Precip: -
7 Partly Cloudy
Actual: 59 | 35
Precip: 0.00
Average: - | -
Precip: -
8 Partly Cloudy
Actual: 57 | 32
Precip: 0.00
Average: - | -
Precip: -
9 Clear
Actual: 66 | 37
Precip: 0.00
Average: - | -
Precip: -
10 Clear
Actual: 64 | 37
Precip: 0.00
Average: - | -
Precip: -
11 Mostly Cloudy
Actual: 51 | 35
Precip: 0.07
Average: - | -
Precip: -
12 Partly Cloudy
Actual: 53 | 33
Precip: 0.00
Average: - | -
Precip: -
13 Scattered Clouds
Actual: 53 | 30
Precip: 0.00
Average: - | -
Precip: -
14 Partly Cloudy
Actual: 51 | 30
Precip: 0.00
Average: - | -
Precip: -
15 Mostly Cloudy
Actual: 46 | 28
Precip: 0.05
Average: - | -
Precip: -
16 Overcast
Actual: 53 | 42
Precip: 0.01
Average: - | -
Precip: -
17 Partly Cloudy
Actual: 57 | 39
Precip: 0.09
Average: - | -
Precip: -
18 Clear
Actual: 50 | 32
Precip: 0.00
Average: - | -
Precip: -
19 Scattered Clouds
Actual: 50 | 26
Precip: 0.00
Average: - | -
Precip: -
20 Mostly Cloudy
Actual: 55 | 35
Precip: 0.00
Average: - | -
Precip: -
21 Overcast
Actual: 55 | 48
Precip: 0.69
Average: - | -
Precip: -
22 Mostly Cloudy
Actual: 57 | 46
Precip: 0.66
Average: - | -
Precip: -
23 Mostly Cloudy
Actual: 57 | 41
Precip: 1.09
Average: - | -
Precip: -
24 Scattered Clouds
Actual: 53 | 33
Precip: 0.00
Average: - | -
Precip: -
25 Partly Cloudy
Actual: 46 | 37
Precip: 1.09
Average: - | -
Precip: -
26 Partly Cloudy
Actual: 55 | 39
Precip: 0.08
Average: - | -
Precip: -
27 Scattered Clouds
Actual: 53 | 33
Precip: 0.00
Average: - | -
Precip: -
28 Partly Cloudy
Actual: 46 | 32
Precip: 0.01
Average: - | -
Precip: -
29 Partly Cloudy
Actual: 55 | 35
Precip: 0.01
Average: - | -
Precip: -
30 Partly Cloudy
Actual: 53 | 30
Precip: 0.00
Average: - | -
Precip: -
31 Scattered Clouds
Actual: 51 | 26
Precip: 0.00
Average: - | -
Precip: -
 
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
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 62 58 55 61 57 54 100 95 77 30.04 29.97 29.87 10 6 1 13 6 25 0.33  
2 62 52 42 59 51 41 100 87 59 30.12 29.92 29.72 10 8 2 29 11 41 1.11  
3 59 48 37 48 44 37 100 88 59 30.23 30.18 30.12 10 8 0 8 2 - 0.00  
4 57 52 48 54 51 48 100 90 77 30.25 30.19 30.15 10 9 2 9 3 - 0.16  
5 59 57 55 59 57 55 100 100 100 30.18 30.14 30.11 9 3 1 8 5 - 0.27  
6 59 50 41 55 49 41 100 92 67 30.16 30.13 30.09 10 8 1 10 2 - 0.00  
7 59 47 35 48 42 36 100 92 59 30.17 30.12 30.08 10 6 0 7 3 - 0.00  
8 57 44 32 48 40 32 100 93 59 30.15 30.09 30.06 10 6 0 8 1 - 0.00  
9 66 52 37 50 43 37 100 84 49 30.21 30.15 30.11 10 10 9 9 2 - 0.00  
10 64 50 37 52 44 37 100 86 56 30.26 30.19 30.12 10 9 1 6 2 - 0.00  
11 51 43 35 50 44 36 100 97 82 30.12 29.99 29.86 10 6 0 12 3 16 0.07  
12 53 43 33 46 40 34 100 88 58 29.92 29.88 29.84 10 10 0 15 4 21 0.00  
13 53 42 30 39 35 30 100 90 47 29.96 29.91 29.87 10 9 3 13 1 - 0.00  
14 51 40 30 41 36 30 100 91 54 30.06 29.93 29.84 10 10 9 9 1 - 0.00  
15 46 37 28 43 38 28 100 95 81 30.09 30.05 30.01 10 5 0 15 4 23 0.05  
16 53 48 42 52 46 41 100 96 81 30.12 30.07 30.02 10 6 2 9 6 - 0.01  
17 57 48 39 55 48 37 100 94 77 30.06 30.01 29.98 10 8 2 13 5 21 0.09  
18 50 41 32 37 31 28 100 73 43 30.21 30.09 30.02 10 10 10 15 6 24 0.00  
19 50 38 26 30 28 25 93 69 40 30.34 30.26 30.21 10 10 6 10 4 - 0.00  
20 55 45 35 45 35 27 76 63 54 30.23 30.10 29.99 10 10 9 16 8 25 0.00  
21 55 52 48 54 48 43 100 94 76 29.98 29.91 29.85 10 7 1 15 9 22 0.69  
22 57 52 46 50 45 39 100 82 51 30.08 29.94 29.84 10 9 2 21 7 30 0.66  
23 57 50 41 55 49 41 100 98 88 30.07 29.95 29.85 10 6 2 22 7 31 1.09  
24 53 43 33 46 40 34 100 90 62 30.23 30.16 30.03 10 7 0 6 2 - 0.00  
25 46 42 37 45 41 37 100 96 81 30.17 29.99 29.80 10 7 1 15 4 24 1.09  
26 55 47 39 46 42 39 100 85 58 30.11 29.98 29.87 10 8 0 16 4 24 0.08  
27 53 43 33 41 38 34 100 82 51 30.19 30.15 30.11 10 10 9 7 3 - 0.00  
28 46 39 32 41 37 32 100 88 76 30.20 30.13 30.05 10 9 1 9 3 - 0.01  
29 55 45 35 43 40 36 100 87 58 30.10 30.06 30.03 10 8 4 9 3 - 0.01  
30 53 42 30 45 36 30 100 89 58 30.20 30.11 30.07 10 7 0 12 1 - 0.00  
31 51 38 26 45 34 27 100 86 47 30.32 30.26 30.20 10 10 1 7 2 - 0.00  
Comma Delimited File