Weather History for Half Moon Bay, CA

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Sunday, December 9, 2012

  Actual Average Record
Temperature  
Mean Temperature 54 °F -  
Max Temperature 66 °F 59 °F 66 °F (2012)
Min Temperature 41 °F 45 °F 32 °F (2013)
Degree Days  
Heating Degree Days 12    
Growing Degree Days 4 (Base 50)    
Moisture  
Dew Point 41 °F    
Average Humidity 64    
Maximum Humidity 93    
Minimum Humidity 32    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.13 in    
Wind  
Wind Speed 6 mph (NNE)    
Max Wind Speed 17 mph    
Max Gust Speed 24 mph    
Visibility 10 miles    
Events      
Averages and records for this station are not official NWS values.
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 09, 2012 Rise Set
Actual Time 7:13 AM PST 4:51 PM PST
Civil Twilight 6:44 AM PST 5:20 PM PST
Nautical Twilight 6:11 AM PST 5:53 PM PST
Astronomical Twilight 5:39 AM PST 6:25 PM PST
Moon 2:56 AM PST (12/9) 1:59 PM PST (12/9)
Length of Visible Light 10h 36m
Length of Day
9h 38m
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

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 42.8 °F 41.1 °F 39.2 °F 87% 30.10 in 10.0 mi NE 3.5 mph - N/A   Partly Cloudy
12:35 AM 41.0 °F - 39.2 °F 93% 30.10 in 10.0 mi Calm Calm - N/A   Clear
12:55 AM 41.0 °F - 39.2 °F 93% 30.10 in 10.0 mi Calm Calm - N/A   Clear
1:15 AM 42.8 °F - 39.2 °F 87% 30.10 in 10.0 mi Calm Calm - N/A   Clear
1:35 AM 44.6 °F 40.7 °F 39.2 °F 81% 30.10 in 10.0 mi East 6.9 mph - N/A   Clear
1:55 AM 55.4 °F - 39.2 °F 54% 30.11 in 10.0 mi ESE 5.8 mph - N/A   Clear
2:15 AM 55.4 °F - 35.6 °F 47% 30.11 in 10.0 mi East 4.6 mph - N/A   Clear
2:35 AM 57.2 °F - 37.4 °F 48% 30.10 in 10.0 mi East 10.4 mph - N/A   Clear
2:55 AM 55.4 °F - 37.4 °F 51% 30.10 in 10.0 mi East 8.1 mph - N/A   Clear
3:15 AM 50.0 °F - 39.2 °F 66% 30.11 in 10.0 mi NE 4.6 mph - N/A   Clear
3:35 AM 46.4 °F - 39.2 °F 76% 30.11 in 10.0 mi Calm Calm - N/A   Clear
4:15 AM 46.4 °F 44.3 °F 39.2 °F 76% 30.11 in 10.0 mi North 4.6 mph - N/A   Clear
4:35 AM 48.2 °F - 37.4 °F 66% 30.11 in 10.0 mi Calm Calm - N/A   Clear
4:55 AM 46.4 °F 44.3 °F 39.2 °F 76% 30.11 in 10.0 mi NNE 4.6 mph - N/A   Clear
5:15 AM 48.2 °F - 37.4 °F 66% 30.12 in 10.0 mi Calm Calm - N/A   Clear
5:35 AM 51.8 °F - 35.6 °F 54% 30.12 in 10.0 mi NE 3.5 mph - N/A   Clear
5:55 AM 57.2 °F - 32.0 °F 38% 30.12 in 10.0 mi WNW 5.8 mph - N/A   Clear
6:15 AM 57.2 °F - 35.6 °F 44% 30.12 in 10.0 mi NNW 6.9 mph - N/A   Clear
6:35 AM 50.0 °F - 41.0 °F 71% 30.13 in 9.0 mi NNE 3.5 mph - N/A   Clear
6:55 AM 53.6 °F - 35.6 °F 51% 30.13 in 10.0 mi Calm Calm - N/A   Clear
7:15 AM 55.4 °F - 33.8 °F 44% 30.14 in 10.0 mi North 6.9 mph - N/A   Clear
7:35 AM 55.4 °F - 33.8 °F 44% 30.14 in 10.0 mi NNE 5.8 mph - N/A   Clear
7:55 AM 57.2 °F - 32.0 °F 38% 30.14 in 10.0 mi North 4.6 mph - N/A   Clear
8:15 AM 55.4 °F - 35.6 °F 47% 30.15 in 10.0 mi NNW 6.9 mph - N/A   Clear
8:35 AM 59.0 °F - 33.8 °F 39% 30.15 in 10.0 mi NE 4.6 mph - N/A   Clear
8:55 AM 57.2 °F - 41.0 °F 55% 30.15 in 10.0 mi North 6.9 mph - N/A   Clear
9:15 AM 62.6 °F - 32.0 °F 32% 30.15 in 10.0 mi ENE 8.1 mph - N/A   Clear
9:35 AM 62.6 °F - 32.0 °F 32% 30.16 in 10.0 mi NE 8.1 mph 16.1 mph N/A   Clear
9:55 AM 64.4 °F - 35.6 °F 34% 30.17 in 10.0 mi NE 10.4 mph - N/A   Clear
10:15 AM 64.4 °F - 35.6 °F 34% 30.17 in 10.0 mi NE 12.7 mph 24.2 mph N/A   Clear
10:35 AM 64.4 °F - 35.6 °F 34% 30.17 in 10.0 mi NE 12.7 mph 21.9 mph N/A   Clear
10:55 AM 66.2 °F - 35.6 °F 32% 30.17 in 10.0 mi NE 12.7 mph 18.4 mph N/A   Clear
11:15 AM 66.2 °F - 35.6 °F 32% 30.16 in 10.0 mi NNE 15.0 mph 24.2 mph N/A   Clear
11:35 AM 66.2 °F - 39.2 °F 37% 30.15 in 10.0 mi NE 12.7 mph 23.0 mph N/A   Clear
11:55 AM 66.2 °F - 39.2 °F 37% 30.14 in 9.0 mi NNE 12.7 mph 20.7 mph N/A   Clear
12:15 PM 66.2 °F - 37.4 °F 35% 30.13 in 10.0 mi North 9.2 mph 21.9 mph N/A   Clear
12:35 PM 64.4 °F - 46.4 °F 52% 30.12 in 10.0 mi NW 12.7 mph 19.6 mph N/A   Clear
12:55 PM 60.8 °F - 50.0 °F 68% 30.12 in 10.0 mi NNW 16.1 mph 21.9 mph N/A   Clear
1:15 PM 59.0 °F - 50.0 °F 72% 30.11 in 10.0 mi NNW 15.0 mph - N/A   Clear
1:35 PM 59.0 °F - 50.0 °F 72% 30.10 in 10.0 mi NNW 16.1 mph - N/A   Clear
1:55 PM 59.0 °F - 48.2 °F 67% 30.10 in 10.0 mi NNW 17.3 mph - N/A   Clear
2:15 PM 59.0 °F - 46.4 °F 63% 30.10 in 10.0 mi NNW 16.1 mph - N/A   Clear
2:35 PM 59.0 °F - 48.2 °F 67% 30.10 in 9.0 mi NNW 13.8 mph - N/A   Clear
2:55 PM 60.8 °F - 48.2 °F 63% 30.11 in 9.0 mi NNW 12.7 mph 16.1 mph N/A   Clear
3:15 PM 59.0 °F - 48.2 °F 67% 30.11 in 9.0 mi NNW 12.7 mph - N/A   Clear
3:35 PM 59.0 °F - 50.0 °F 72% 30.11 in 9.0 mi North 11.5 mph - N/A   Clear
3:55 PM 59.0 °F - 50.0 °F 72% 30.12 in 10.0 mi North 8.1 mph - N/A   Clear
4:15 PM 57.2 °F - 50.0 °F 77% 30.12 in 10.0 mi NNW 10.4 mph - N/A   Clear
4:35 PM 57.2 °F - 50.0 °F 77% 30.12 in 9.0 mi North 6.9 mph - N/A   Clear
4:55 PM 55.4 °F - 50.0 °F 82% 30.12 in 10.0 mi NNE 4.6 mph - N/A   Clear
5:15 PM 55.4 °F - 50.0 °F 82% 30.13 in 9.0 mi NNE 10.4 mph - N/A   Clear
5:35 PM 53.6 °F - 50.0 °F 88% 30.13 in 10.0 mi NE 6.9 mph - N/A   Clear
5:55 PM 53.6 °F - 48.2 °F 82% 30.13 in 10.0 mi NNW 3.5 mph - N/A   Clear
6:15 PM 51.8 °F - 48.2 °F 88% 30.14 in 10.0 mi Calm Calm - N/A   Clear
6:35 PM 51.8 °F - 46.4 °F 82% 30.15 in 10.0 mi NE 4.6 mph - N/A   Clear
6:55 PM 50.0 °F - 46.4 °F 87% 30.15 in 10.0 mi NNE 3.5 mph - N/A   Clear
7:15 PM 50.0 °F - 46.4 °F 87% 30.15 in 10.0 mi Calm Calm - N/A   Clear
7:35 PM 50.0 °F - 44.6 °F 82% 30.15 in 10.0 mi Calm Calm - N/A   Clear
7:55 PM 50.0 °F - 44.6 °F 82% 30.14 in 10.0 mi NNE 6.9 mph - N/A   Clear
8:15 PM 57.2 °F - 42.8 °F 59% 30.14 in 10.0 mi North 8.1 mph - N/A   Clear
8:35 PM 53.6 °F - 44.6 °F 72% 30.15 in 10.0 mi NNE 8.1 mph - N/A   Clear
8:55 PM 51.8 °F - 46.4 °F 82% 30.15 in 10.0 mi NE 3.5 mph - N/A   Clear
9:15 PM 50.0 °F - 42.8 °F 76% 30.16 in 10.0 mi Calm Calm - N/A   Clear
9:35 PM 48.2 °F - 42.8 °F 82% 30.17 in 10.0 mi Calm Calm - N/A   Clear
9:55 PM 48.2 °F - 42.8 °F 82% 30.16 in 10.0 mi Calm Calm - N/A   Clear
10:15 PM 50.0 °F - 41.0 °F 71% 30.16 in 10.0 mi Calm Calm - N/A   Clear
10:35 PM 48.2 °F - 41.0 °F 76% 30.17 in 10.0 mi Calm Calm - N/A   Clear
10:55 PM 48.2 °F - 41.0 °F 76% 30.17 in 10.0 mi Calm Calm - N/A   Clear
11:15 PM 46.4 °F 45.2 °F 41.0 °F 81% 30.18 in 10.0 mi ENE 3.5 mph - N/A   Clear
11:35 PM 57.2 °F - 39.2 °F 51% 30.18 in 10.0 mi ENE 8.1 mph - N/A   Clear
11:55 PM 53.6 °F - 41.0 °F 62% 30.18 in 10.0 mi SE 3.5 mph - N/A   Clear