Weather History for Napa County, CA

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Month of August, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 92 °F 79 °F 69 °F
Mean Temperature 70 °F 66 °F 60 °F
Min Temperature 57 °F 52 °F 45 °F
Degree Days  
Heating Degree Days (base 65) 5 1 0 29
Cooling Degree Days (base 65) 5 2 0 48
Growing Degree Days (base 50) 20 15 10 474
Dew Point  
Dew Point 59 °F 53 °F 43 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 28 mph 8 mph 0 mph
Gust Wind 93 mph 28 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.12 in 29.88 in 29.69 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Aug. 21, 2012 Rise Set
Actual Time 6:29 AM PDT 7:53 PM PDT
Civil Twilight 6:01 AM PDT 8:21 PM PDT
Nautical Twilight 5:28 AM PDT 8:54 PM PDT
Astronomical Twilight 4:53 AM PDT 9:29 PM PDT
Moon 11:01 AM PDT (8/21) 10:03 PM PDT (8/21)
Length of Visible Light 14h 19m
Length of Day
13h 24m
Waxing Crescent, 20% of the Moon is Illuminated
Aug 21
Waxing Crescent
Aug 24
First Quarter
Aug 31
Full
Sep 8
Last Quarter
Sep 15
New

Weather History Calendar

Precipitation Actual month total 0.00 Average Month Total: 0.08
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Scattered Clouds
Actual:
79 | 55 0.00
Average:
85 | 54 0.00
Partly Cloudy
Actual:
80 | 56 0.00
Average:
83 | 54 0.00
Partly Cloudy
Actual:
72 | 54 0.00
Average:
82 | 54 0.00
Partly Cloudy
Actual:
74 | 53 0.00
Average:
81 | 54 0.00
Partly Cloudy
Actual:
78 | 57 0.00
Average:
82 | 53 0.00
Partly Cloudy
Actual:
83 | 54 0.00
Average:
85 | 55 0.00
Clear
Actual:
84 | 47 0.00
Average:
85 | 55 0.00
Clear
Actual:
87 | 47 0.00
Average:
84 | 55 0.00
Clear
Actual:
88 | 50 0.00
Average:
83 | 54 0.00
Clear
Actual:
85 | 51 0.00
Average:
81 | 54 0.00
Fog
Actual:
87 | 48 0.00
Average:
80 | 54 0.00
Scattered Clouds
Actual:
80 | 48 0.00
Average:
80 | 53 0.00
Clear
Actual:
84 | 53 0.00
Average:
80 | 53 0.00
Clear
Actual:
77 | 54 0.00
Average:
80 | 54 0.00
Scattered Clouds
Actual:
76 | 56 0.00
Average:
81 | 53 0.01
Scattered Clouds
Actual:
79 | 53 0.00
Average:
81 | 53 0.00
Scattered Clouds
Actual:
81 | 52 0.00
Average:
82 | 53 0.00
Clear
Actual:
80 | 56 T
Average:
80 | 53 0.01
Partly Cloudy
Actual:
76 | 50 0.00
Average:
79 | 54 0.01
Partly Cloudy
Actual:
73 | 54 0.00
Average:
80 | 53 0.04
Partly Cloudy
Actual:
72 | 51 0.00
Average:
81 | 54 0.00
Partly Cloudy
Actual:
72 | 52 0.00
Average:
82 | 53 0.00
Partly Cloudy
Actual:
73 | 53 0.00
Average:
83 | 52 0.00
Partly Cloudy
Actual:
73 | 50 0.00
Average:
83 | 53 0.00
Partly Cloudy
Actual:
69 | 51 0.00
Average:
81 | 53 0.00
Partly Cloudy
Actual:
75 | 53 0.00
Average:
82 | 53 0.00
Fog
Actual:
86 | 45 0.00
Average:
82 | 54 0.00
Clear
Actual:
90 | 50 0.00
Average:
84 | 53 0.00
Clear
Actual:
92 | 47 0.00
Average:
84 | 54 0.00
Scattered Clouds
Actual:
72 | 51 0.00
Average:
82 | 55 0.00
Partly Cloudy
Actual:
71 | 54 0.00
Average:
82 | 53 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
Aug high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 79 67 55 57 54 53 93 69 45 30.06 29.99 29.93 10 10 8 15 8 24 0.00  
2 80 68 56 57 55 53 93 69 45 30.00 29.93 29.84 10 9 8 16 9 21 0.00  
3 72 63 54 55 53 51 93 75 57 29.90 29.84 29.78 10 10 10 18 11 23 0.00  
4 74 64 53 57 53 50 93 73 53 29.97 29.88 29.82 10 10 10 21 11 25 0.00  
5 78 68 57 58 56 53 90 70 49 30.05 29.99 29.94 10 10 10 18 12 26 0.00  
6 83 69 54 57 54 52 86 63 40 30.12 30.05 29.99 10 10 10 15 8 29 0.00  
7 84 66 47 57 53 47 93 64 35 30.03 29.98 29.92 10 10 5 18 7 23 0.00  
8 87 67 47 56 53 46 93 64 34 29.99 29.93 29.86 10 10 9 15 5 22 0.00  
9 88 69 50 57 55 50 96 64 31 29.93 29.86 29.78 10 10 9 13 5 16 0.00  
10 85 68 51 58 54 49 93 65 37 29.82 29.78 29.70 10 9 7 14 5 16 0.00  
11 87 68 48 58 53 48 96 67 37 29.81 29.75 29.69 10 8 0 13 5 16 0.00 Fog
12 80 64 48 57 52 46 93 69 45 29.87 29.81 29.74 10 10 7 12 7 16 0.00  
13 84 69 53 56 53 49 89 63 37 29.83 29.78 29.73 10 10 10 13 6 21 0.00  
14 77 66 54 57 55 51 86 70 53 29.80 29.77 29.73 10 10 10 20 9 - 0.00  
15 76 66 56 56 54 51 86 68 50 29.87 29.82 29.77 10 10 10 20 11 23 0.00  
16 79 66 53 58 53 50 93 69 44 29.96 29.89 29.83 10 10 9 17 9 20 0.00  
17 81 67 52 57 53 51 93 66 39 30.00 29.92 29.86 10 10 10 20 10 32 0.00  
18 80 68 56 56 54 50 84 62 39 29.94 29.89 29.84 10 10 10 23 11 28 T  
19 76 63 50 56 53 48 89 70 50 29.97 29.91 29.85 10 10 10 16 8 26 0.00  
20 73 64 54 55 53 51 93 71 49 29.94 29.87 29.81 10 10 10 16 9 20 0.00  
21 72 62 51 56 53 48 93 75 57 29.93 29.86 29.81 10 10 10 17 9 28 0.00  
22 72 62 52 56 54 50 93 75 57 29.93 29.88 29.85 10 10 8 20 11 24 0.00  
23 73 63 53 57 53 50 93 75 57 29.96 29.88 29.81 10 9 1 15 8 21 0.00  
24 73 62 50 54 53 49 93 71 49 29.91 29.85 29.80 10 10 8 17 8 20 0.00  
25 69 60 51 54 51 48 96 77 57 29.88 29.83 29.76 10 10 7 21 10 26 0.00  
26 75 64 53 52 50 47 89 64 38 29.96 29.90 29.82 10 10 10 20 12 25 0.00  
27 86 66 45 59 51 43 93 65 37 30.03 29.97 29.91 10 8 0 16 5 29 0.00 Fog
28 90 70 50 56 53 46 96 60 23 30.02 29.94 29.89 10 10 10 28 6 93 0.00  
29 92 70 47 57 51 46 100 62 23 29.91 29.84 29.75 10 10 10 12 5 15 0.00  
30 72 62 51 56 53 48 93 73 53 29.83 29.78 29.73 10 10 8 20 8 31 0.00  
31 71 63 54 52 51 49 89 71 53 29.94 29.88 29.82 10 10 10 21 10 26 0.00