Weather History for Napa County, CA

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Month of August, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 92 °F 75 °F 68 °F
Mean Temperature 71 °F 65 °F 62 °F
Min Temperature 57 °F 54 °F 47 °F
Degree Days  
Heating Degree Days (base 65) 3 1 0 28
Cooling Degree Days (base 65) 6 0 0 13
Growing Degree Days (base 50) 20 14 10 426
Dew Point  
Dew Point 60 °F 54 °F 47 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 23 mph 9 mph 0 mph
Gust Wind 72 mph 30 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.06 in 29.89 in 29.69 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Aug. 11, 2011 Rise Set
Actual Time 6:20 AM PDT 8:07 PM PDT
Civil Twilight 5:51 AM PDT 8:36 PM PDT
Nautical Twilight 5:17 AM PDT 9:10 PM PDT
Astronomical Twilight 4:40 AM PDT 9:47 PM PDT
Moon 6:48 PM PDT (8/11) 4:15 AM PDT (8/11)
Length of Visible Light 14h 44m
Length of Day
13h 47m
Waxing Gibbous, 96% of the Moon is Illuminated
Aug 11
Waxing Gibbous
Aug 13
Full
Aug 21
Last Quarter
Aug 28
New
Sep 4
First Quarter

Weather History Calendar

Precipitation Actual month total 0.00 Average Month Total: 0.08
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
76 | 52 0.00
Average:
85 | 54 0.00
Scattered Clouds
Actual:
77 | 49 0.00
Average:
83 | 54 0.00
Partly Cloudy
Actual:
73 | 55 0.00
Average:
82 | 54 0.00
Partly Cloudy
Actual:
73 | 57 0.00
Average:
81 | 54 0.00
Partly Cloudy
Actual:
75 | 56 0.00
Average:
82 | 53 0.00
Partly Cloudy
Actual:
72 | 55 0.00
Average:
85 | 55 0.00
Partly Cloudy
Actual:
72 | 54 0.00
Average:
85 | 55 0.00
Partly Cloudy
Actual:
74 | 55 0.00
Average:
84 | 55 0.00
Partly Cloudy
Actual:
76 | 55 0.00
Average:
83 | 54 0.00
Scattered Clouds
Actual:
72 | 56 0.00
Average:
81 | 54 0.00
Partly Cloudy
Actual:
70 | 54 0.00
Average:
80 | 54 0.00
Partly Cloudy
Actual:
74 | 56 0.00
Average:
80 | 53 0.00
Scattered Clouds
Actual:
76 | 53 0.00
Average:
80 | 53 0.00
Scattered Clouds
Actual:
77 | 51 0.00
Average:
80 | 54 0.00
Scattered Clouds
Actual:
76 | 47 0.00
Average:
81 | 53 0.01
Partly Cloudy
Actual:
76 | 53 0.00
Average:
81 | 53 0.00
Partly Cloudy
Actual:
74 | 54 0.00
Average:
82 | 53 0.00
Partly Cloudy
Actual:
73 | 54 0.00
Average:
80 | 53 0.01
Partly Cloudy
Actual:
68 | 55 0.00
Average:
79 | 54 0.01
Partly Cloudy
Actual:
70 | 55 0.00
Average:
80 | 53 0.04
Partly Cloudy
Actual:
71 | 56 0.00
Average:
81 | 54 0.00
Partly Cloudy
Actual:
76 | 55 0.00
Average:
82 | 53 0.00
Scattered Clouds
Actual:
92 | 49 0.00
Average:
83 | 52 0.00
Clear
Actual:
80 | 52 0.00
Average:
83 | 53 0.00
Partly Cloudy
Actual:
76 | 57 0.00
Average:
81 | 53 0.00
Partly Cloudy
Actual:
77 | 52 0.00
Average:
82 | 53 0.00
Fog
Actual:
76 | 52 0.00
Average:
82 | 54 0.00
Fog
Actual:
78 | 52 0.00
Average:
84 | 53 0.00
Partly Cloudy
Actual:
75 | 57 0.00
Average:
84 | 54 0.00
Partly Cloudy
Actual:
71 | 55 0.00
Average:
82 | 55 0.00
Partly Cloudy
Actual:
73 | 52 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

2011 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 76 64 52 57 54 51 93 73 53 30.03 29.97 29.91 10 10 10 17 9 21 0.00  
2 77 63 49 57 53 48 100 75 50 29.98 29.92 29.84 10 10 10 15 8 26 0.00  
3 73 64 55 57 54 52 93 77 61 29.91 29.86 29.79 10 10 7 21 9 24 0.00  
4 73 65 57 58 55 53 93 75 57 29.95 29.90 29.86 10 10 10 20 11 24 0.00  
5 75 66 56 59 56 54 93 75 57 29.97 29.91 29.86 10 10 10 16 9 38 0.00  
6 72 64 55 58 55 54 93 77 61 29.98 29.92 29.89 10 10 10 20 11 23 0.00  
7 72 63 54 57 54 52 93 77 61 30.00 29.94 29.89 10 10 10 17 9 25 0.00  
8 74 65 55 58 55 53 93 77 61 29.99 29.93 29.87 10 9 4 19 9 26 0.00  
9 76 66 55 57 55 53 93 73 53 29.93 29.86 29.80 10 9 6 16 9 38 0.00  
10 72 64 56 56 54 53 93 75 57 29.89 29.84 29.81 10 9 7 20 10 63 0.00  
11 70 62 54 56 54 52 93 77 61 29.93 29.89 29.86 10 10 9 22 11 45 0.00  
12 74 65 56 58 55 53 93 75 57 29.97 29.90 29.86 10 10 8 15 9 17 0.00  
13 76 65 53 57 54 52 100 77 53 29.91 29.86 29.81 10 9 6 16 8 39 0.00  
14 77 64 51 56 53 48 93 71 49 29.94 29.90 29.84 10 10 10 15 10 19 0.00  
15 76 62 47 57 53 47 100 75 50 29.93 29.89 29.85 10 10 6 23 8 - 0.00  
16 76 65 53 57 55 53 100 77 53 29.96 29.91 29.88 10 10 8 15 7 18 0.00  
17 74 64 54 57 55 52 93 75 57 30.06 29.98 29.92 10 10 9 16 8 26 0.00  
18 73 64 54 57 54 51 100 79 57 30.01 29.94 29.86 10 8 2 18 8 26 0.00  
19 68 62 55 54 53 52 93 78 63 29.92 29.86 29.80 10 10 10 21 12 31 0.00  
20 70 63 55 55 53 51 86 72 57 29.93 29.87 29.82 10 10 10 23 10 72 0.00  
21 71 64 56 57 54 52 93 77 61 30.00 29.95 29.90 10 10 10 18 8 22 0.00  
22 76 66 55 58 56 54 93 74 54 30.05 29.97 29.91 10 10 9 15 7 50 0.00  
23 92 71 49 60 55 48 100 63 26 29.95 29.88 29.81 10 9 2 14 5 16 0.00  
24 80 66 52 59 56 51 93 69 45 29.92 29.88 29.84 10 10 9 17 6 21 0.00  
25 76 67 57 60 57 54 100 80 60 29.93 29.88 29.81 10 10 10 14 7 28 0.00  
26 77 65 52 58 56 53 93 74 54 29.93 29.88 29.84 10 10 8 20 7 22 0.00  
27 76 64 52 58 54 52 100 77 54 29.99 29.92 29.86 10 6 0 20 6 22 0.00 Fog
28 78 65 52 59 54 52 100 75 50 29.95 29.89 29.81 10 6 0 14 7 15 0.00 Fog
29 75 66 57 58 55 54 93 74 54 29.89 29.84 29.76 10 9 8 17 10 21 0.00  
30 71 63 55 56 54 53 93 77 61 29.82 29.77 29.69 10 10 8 16 12 21 0.00  
31 73 63 52 56 54 52 93 73 53 29.80 29.75 29.72 10 9 8 20 8 23 0.00