Weather History for Santa Rosa, CA

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 69 °F 56 °F 46 °F
Mean Temperature 59 °F 47 °F 38 °F
Min Temperature 56 °F 38 °F 26 °F
Degree Days  
Heating Degree Days (base 65) 27 18 6 544
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 10 1 0 30
Dew Point  
Dew Point 59 °F 41 °F 25 °F
Precipitation  
Precipitation 2.55 in 0.39 in 0.00 in 11.73 in
Snowdepth - - - -
Wind  
Wind 33 mph 4 mph 0 mph
Gust Wind 46 mph 23 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.30 in 30.02 in 29.63 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 09, 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 2:58 AM PST (12/9) 1:58 PM PST (12/9)
Length of Visible Light 10h 32m
Length of Day
9h 32m
Waning Crescent, 17% of the Moon is Illuminated
Dec 9
Waning Crescent
Dec 13
New
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Weather History Calendar

Precipitation Actual month total 11.73 Normal Month Total: 7.03
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
62 | 56 1.12
Average:
59 | 38 0.13
Rain
Actual:
63 | 43 1.67
Average:
58 | 38 0.14
Fog
Actual:
60 | 40 0.00
Average:
58 | 38 0.15
Rain
Actual:
56 | 51 0.71
Average:
58 | 37 0.16
Rain
Actual:
61 | 54 0.31
Average:
58 | 37 0.17
Rain
Actual:
61 | 40 0.01
Average:
57 | 37 0.17
Fog
Actual:
62 | 36 0.00
Average:
57 | 37 0.18
Fog
Actual:
60 | 33 0.00
Average:
57 | 37 0.19
Scattered Clouds
Actual:
69 | 38 0.00
Average:
57 | 37 0.19
Fog
Actual:
68 | 37 0.01
Average:
57 | 37 0.20
Rain
Actual:
55 | 36 0.04
Average:
56 | 37 0.20
Fog
Actual:
54 | 34 0.00
Average:
56 | 37 0.21
Clear
Actual:
55 | 31 0.00
Average:
56 | 36 0.22
Rain
Actual:
54 | 32 0.03
Average:
56 | 36 0.23
Rain
Actual:
46 | 30 0.12
Average:
56 | 36 0.24
Rain
Actual:
52 | 43 0.37
Average:
56 | 36 0.24
Rain
Actual:
59 | 43 0.21
Average:
56 | 36 0.25
Scattered Clouds
Actual:
52 | 32 0.00
Average:
56 | 36 0.27
Scattered Clouds
Actual:
52 | 26 0.00
Average:
56 | 36 0.27
Rain
Actual:
54 | 33 0.39
Average:
56 | 36 0.27
Rain
Actual:
55 | 49 2.55
Average:
56 | 36 0.27
Thunderstorm
Actual:
55 | 43 0.59
Average:
56 | 36 0.28
Rain
Actual:
59 | 41 2.37
Average:
56 | 36 0.27
Rain
Actual:
55 | 34 T
Average:
56 | 36 0.26
Rain
Actual:
46 | 38 0.65
Average:
56 | 36 0.27
Rain
Actual:
56 | 37 0.51
Average:
56 | 36 0.28
Scattered Clouds
Actual:
56 | 37 0.00
Average:
56 | 36 0.27
Rain
Actual:
47 | 32 0.06
Average:
56 | 36 0.27
Rain
Actual:
57 | 38 0.01
Average:
56 | 36 0.26
Fog
Actual:
57 | 31 0.00
Average:
56 | 36 0.26
Fog
Actual:
53 | 28 0.00
Average:
56 | 36 0.26
 

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 59 56 59 56 54 100 93 86 29.99 29.91 29.81 10 6 2 20 9 35 1.12 Rain
2 63 53 43 59 51 41 93 73 53 30.09 29.84 29.63 10 7 1 33 9 46 1.67 Rain
3 60 50 40 49 43 39 100 78 55 30.19 30.14 30.09 10 7 1 9 2 10 0.00 Fog
4 56 54 51 54 52 48 100 92 83 30.20 30.15 30.11 10 6 2 7 1 9 0.71 Rain
5 61 58 54 58 55 53 100 95 90 30.16 30.11 30.08 10 3 1 7 1 9 0.31 Rain
6 61 51 40 55 47 39 100 80 60 30.14 30.11 30.06 10 5 0 10 5 13 0.01 Fog , Rain
7 62 49 36 46 40 36 100 75 49 30.14 30.09 30.05 10 5 0 7 2 8 0.00 Fog
8 60 47 33 45 38 32 100 77 53 30.12 30.07 30.02 10 5 0 6 2 7 0.00 Fog
9 69 54 38 47 42 37 100 71 42 30.17 30.12 30.08 10 9 7 14 5 15 0.00  
10 68 53 37 51 43 37 100 76 52 30.22 30.16 30.09 10 3 0 6 1 7 0.01 Fog
11 55 46 36 48 43 36 100 87 74 30.09 29.93 29.82 10 4 0 10 3 13 0.04 Fog , Rain
12 54 44 34 46 40 33 100 80 59 29.90 29.83 29.80 10 4 0 8 2 9 0.00 Fog
13 55 43 31 37 33 30 100 73 45 29.92 29.88 29.84 10 7 1 9 4 12 0.00  
14 54 43 32 41 35 31 100 77 54 30.04 29.92 29.81 10 5 0 12 2 15 0.03 Fog , Rain
15 46 38 30 42 36 28 100 92 83 30.07 30.02 29.97 10 4 0 12 3 18 0.12 Fog , Rain
16 52 48 43 52 46 42 100 95 89 30.09 30.03 29.96 6 3 1 10 3 15 0.37 Rain
17 59 51 43 54 49 33 100 79 57 30.02 29.97 29.94 10 6 1 16 5 23 0.21 Rain
18 52 42 32 35 30 28 82 62 42 30.18 30.06 29.98 10 10 9 21 8 24 0.00  
19 52 39 26 31 28 25 92 67 41 30.30 30.23 30.18 10 9 6 8 2 10 0.00  
20 54 44 33 47 39 30 92 74 56 30.18 30.04 29.92 10 8 4 21 8 26 0.39 Rain
21 55 52 49 52 48 46 96 90 83 29.90 29.85 29.80 10 4 1 22 9 28 2.55 Rain
22 55 49 43 49 44 40 96 78 59 30.04 29.87 29.78 10 8 2 25 6 36 0.59 Rain , Thunderstorm
23 59 50 41 55 47 39 100 89 77 30.01 29.89 29.79 10 5 1 29 7 37 2.37 Rain
24 55 45 34 45 38 33 100 80 59 30.20 30.11 30.01 10 4 0 6 1 9 T Fog , Rain
25 46 42 38 43 41 37 100 95 89 30.14 29.96 29.75 10 4 0 22 3 26 0.65 Fog , Rain
26 56 47 37 45 40 37 100 78 55 30.08 29.91 29.84 10 5 0 20 5 24 0.51 Fog , Rain
27 56 47 37 38 36 34 92 68 43 30.15 30.11 30.07 10 10 7 13 3 16 0.00  
28 47 40 32 41 36 30 100 88 76 30.18 30.12 30.03 10 5 1 7 1 8 0.06 Fog , Rain
29 57 48 38 41 39 35 93 72 50 30.06 30.03 29.99 10 9 6 14 4 17 0.01 Fog , Rain
30 57 44 31 39 34 30 100 74 47 30.17 30.07 30.04 10 6 1 8 3 10 0.00 Fog
31 53 41 28 40 33 26 100 74 48 30.28 30.23 30.18 10 6 1 9 3 9 0.00 Fog