Weather History for Napa County, CA

Change the Weather History Date:

Week of September 23, 2012 through September 29, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 83 °F 76 °F 69 °F
Mean Temperature 65 °F 62 °F 58 °F
Min Temperature 53 °F 48 °F 46 °F
Degree Days  
Heating Degree Days (base 65) 7 3 0 19
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 14 12 8 81
Dew Point  
Dew Point 57 °F 51 °F 44 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 18 mph 6 mph 0 mph
Gust Wind 22 mph 20 mph 20 mph
Sea Level Pressure  
Sea Level Pressure 30.05 in 29.90 in 29.79 in

Weekly Weather History Graph

Weekly Weather History Graph

Search for Another Location

Airport:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Sep. 23, 2012 Rise Set
Actual Time 6:58 AM PDT 7:03 PM PDT
Civil Twilight 6:31 AM PDT 7:29 PM PDT
Nautical Twilight 6:01 AM PDT 8:00 PM PDT
Astronomical Twilight 5:29 AM PDT 8:31 PM PDT
Moon 3:04 PM PDT (9/23) 12:20 AM PDT (9/23)
Length of Visible Light 12h 57m
Length of Day
12h 05m
First Quarter, 61% of the Moon is Illuminated
Sep 23
First Quarter
Sep 29
Full
Oct 8
Last Quarter
Oct 15
New
Oct 21
First Quarter

Daily Weather History & Observations

2012 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  
23 83 65 46 55 51 44 93 65 36 29.94 29.90 29.87 10 10 10 17 7 20 0.00  
24 76 62 48 56 51 46 96 71 46 29.97 29.90 29.84 10 10 7 13 6 15 0.00  
25 73 60 47 55 52 46 100 79 57 29.93 29.87 29.81 10 9 2 18 6 22 0.00  
26 70 62 53 54 52 51 93 75 57 29.91 29.86 29.80 10 8 6 14 6 - 0.00  
27 81 64 46 57 51 45 100 70 39 29.94 29.87 29.79 10 6 0 12 4 20 0.00 Fog
28 69 58 47 55 51 47 100 80 59 29.97 29.90 29.85 10 10 3 17 7 20 0.00  
29 77 65 52 55 52 50 96 71 46 30.05 29.99 29.93 10 9 2 12 5 14 0.00