Weather History for Half Moon Bay, CA

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Week of December 23, 2012 through December 29, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 55 °F 54 °F 53 °F
Mean Temperature 52 °F 48 °F 46 °F
Min Temperature 50 °F 42 °F 39 °F
Degree Days  
Heating Degree Days (base 65) 19 17 12 118
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 2 0 0 2
Dew Point  
Dew Point 55 °F 43 °F 36 °F
Precipitation  
Precipitation 1.19 in 0.31 in 0.00 in 2.19 in
Snowdepth - - - -
Wind  
Wind 31 mph 10 mph 0 mph
Gust Wind 45 mph 25 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.22 in 30.06 in 29.81 in

Weekly Weather History Graph

Weekly Weather History Graph

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Date:

Astronomy

Dec. 29, 2012 Rise Set
Actual Time 7:24 AM PST 5:00 PM PST
Civil Twilight 6:55 AM PST 5:29 PM PST
Nautical Twilight 6:22 AM PST 6:02 PM PST
Astronomical Twilight 5:50 AM PST 6:34 PM PST
Moon 6:36 PM PST (12/29) 8:02 AM PST (12/29)
Length of Visible Light 10h 34m
Length of Day
9h 36m
Full, 98% of the Moon is Illuminated
Dec 29
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

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  
23 55 52 50 55 51 46 100 92 82 30.09 29.98 29.89 10 4 0 31 15 40 1.19 Rain
24 55 48 41 48 44 37 100 80 54 30.22 30.16 30.05 10 9 2 14 7 20 0.02 Rain
25 53 47 41 50 43 37 94 83 71 30.16 29.99 29.81 10 8 2 26 6 45 0.35 Rain
26 53 50 48 48 45 41 88 80 71 30.12 30.01 29.90 10 7 2 28 16 33 0.04 Rain
27 53 46 39 41 40 37 100 73 54 30.19 30.14 30.11 10 10 8 21 13 30 0.00  
28 53 46 39 45 40 36 93 79 54 30.19 30.11 30.03 10 9 2 9 3 - 0.37 Rain
29 53 46 39 45 40 37 93 80 58 30.10 30.04 29.99 10 9 2 21 8 29 0.22 Rain