Weather History for Half Moon Bay, CA

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Month of December, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 73 °F 59 °F 46 °F
Mean Temperature 60 °F 48 °F 39 °F
Min Temperature 48 °F 37 °F 32 °F
Degree Days  
Heating Degree Days (base 65) 26 17 6 522
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 10 1 0 43
Dew Point  
Dew Point 55 °F 35 °F 9 °F
Precipitation  
Precipitation 0.16 in 0.01 in 0.00 in 0.20 in
Snowdepth - - - -
Wind  
Wind 29 mph 5 mph 0 mph
Gust Wind 40 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.40 in 30.16 in 29.74 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 27, 2013 Rise Set
Actual Time 7:23 AM PST 4:59 PM PST
Civil Twilight 6:54 AM PST 5:28 PM PST
Nautical Twilight 6:21 AM PST 6:01 PM PST
Astronomical Twilight 5:49 AM PST 6:32 PM PST
Moon 2:04 AM PST (12/27) 1:09 PM PST (12/27)
Length of Visible Light 10h 34m
Length of Day
9h 35m
Waning Crescent, 27% of the Moon is Illuminated
Dec 27
Waning Crescent
Jan 1
New
Jan 7
First Quarter
Jan 15
Full
Jan 23
Last Quarter

Weather History Calendar

Precipitation Actual month total 0.20 Average Month Total: 3.94
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Rain
Actual:
66 | 39 0.00
Average:
61 | 43 0.10
Rain
Actual:
59 | 46 0.00
Average:
60 | 45 0.20
Rain
Actual:
55 | 35 0.00
Average:
60 | 44 0.15
Clear
Actual:
50 | 32 0.00
Average:
60 | 44 0.18
Scattered Clouds
Actual:
50 | 32 0.00
Average:
61 | 44 0.10
Rain
Actual:
51 | 32 0.16
Average:
59 | 44 0.13
Rain
Actual:
50 | 32 0.02
Average:
60 | 45 0.10
Clear
Actual:
46 | 32 0.00
Average:
60 | 44 0.09
Clear
Actual:
51 | 32 0.00
Average:
59 | 45 0.09
Clear
Actual:
55 | 37 0.00
Average:
58 | 43 0.11
Clear
Actual:
59 | 37 0.02
Average:
58 | 43 0.09
Clear
Actual:
57 | 32 0.00
Average:
58 | 43 0.08
Partly Cloudy
Actual:
62 | 37 0.00
Average:
58 | 42 0.07
Fog
Actual:
64 | 33 0.00
Average:
58 | 43 0.13
Clear
Actual:
64 | 37 0.00
Average:
58 | 43 0.16
Scattered Clouds
Actual:
73 | 46 0.00
Average:
59 | 43 0.08
Partly Cloudy
Actual:
68 | 41 0.00
Average:
60 | 44 0.12
Mostly Cloudy
Actual:
53 | 39 0.00
Average:
58 | 42 0.06
Scattered Clouds
Actual:
55 | 41 0.00
Average:
57 | 41 0.11
Scattered Clouds
Actual:
55 | 32 0.00
Average:
57 | 41 0.18
Partly Cloudy
Actual:
55 | 37 0.00
Average:
56 | 41 0.20
Rain
Actual:
66 | 37 0.00
Average:
55 | 41 0.30
Scattered Clouds
Actual:
59 | 37 0.00
Average:
56 | 40 0.09
Clear
Actual:
71 | 48 0.00
Average:
57 | 41 0.09
Clear
Actual:
69 | 41 0.00
Average:
59 | 41 0.11
Clear
Actual:
68 | 41 0.00
Average:
58 | 42 0.07
Scattered Clouds
Actual:
59 | 41 0.00
Average:
58 | 43 0.24
Partly Cloudy
Actual:
60 | 35 0.00
Average:
57 | 43 0.16
Clear
Actual:
69 | 39 0.00
Average:
58 | 42 0.16
Partly Cloudy
Actual:
62 | 35 0.00
Average:
58 | 42 0.13
Partly Cloudy
Actual:
55 | 35 0.00
Average:
57 | 42 0.06
 

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

2013 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  
1 66 52 39 54 46 39 100 84 49 30.34 30.27 30.24 10 7 1 14 3 - 0.00 Rain
2 59 52 46 55 51 46 100 94 77 30.25 30.13 30.00 9 4 0 21 8 28 0.00 Fog , Rain
3 55 45 35 55 40 32 100 71 51 29.99 29.93 29.88 10 8 2 24 15 32 0.00 Rain
4 50 41 32 32 27 21 87 63 34 30.09 30.03 29.96 10 10 10 12 4 - 0.00  
5 50 41 32 32 24 14 87 55 25 30.18 30.14 30.09 10 10 9 10 6 - 0.00  
6 51 42 32 48 37 28 94 78 54 30.21 30.12 29.96 10 9 1 23 6 33 0.16 Rain
7 50 41 32 48 32 27 94 62 46 30.26 30.12 29.95 10 10 3 21 15 31 0.02 Rain
8 46 39 32 32 23 12 87 55 33 30.32 30.27 30.23 10 10 9 20 7 25 0.00  
9 51 42 32 21 16 9 60 38 20 30.40 30.36 30.32 10 10 9 18 6 29 0.00  
10 55 46 37 32 25 19 57 42 29 30.38 30.27 30.20 10 10 8 15 6 20 0.00  
11 59 48 37 32 25 18 65 41 28 30.21 30.18 30.16 10 10 7 15 5 18 0.02  
12 57 44 32 45 34 25 87 69 44 30.26 30.21 30.18 10 9 5 9 2 - 0.00  
13 62 50 37 46 40 27 100 79 26 30.33 30.28 30.25 10 9 6 10 3 - 0.00  
14 64 48 33 46 35 25 100 64 30 30.38 30.33 30.30 10 8 0 12 3 16 0.00 Fog
15 64 50 37 41 33 25 76 49 30 30.33 30.26 30.20 10 9 5 15 2 22 0.00  
16 73 60 46 45 30 23 58 34 17 30.20 30.13 30.08 10 9 4 15 5 18 0.00  
17 68 54 41 48 36 30 77 55 26 30.14 30.08 30.02 10 9 5 7 1 - 0.00  
18 53 46 39 48 44 32 100 87 61 30.03 29.93 29.82 10 6 1 28 5 38 0.00  
19 55 48 41 45 38 19 82 65 32 29.95 29.83 29.74 10 7 5 29 18 40 0.00  
20 55 44 32 45 32 19 93 65 42 30.02 29.98 29.94 10 8 3 15 4 - 0.00  
21 55 46 37 50 47 37 100 92 82 30.09 30.03 29.98 9 5 2 21 11 26 0.00  
22 66 52 37 50 41 36 100 85 32 30.30 30.20 30.09 10 6 0 8 1 - 0.00 Fog , Rain
23 59 48 37 48 42 36 100 83 45 30.39 30.34 30.30 10 6 2 10 2 - 0.00  
24 71 60 48 45 39 36 71 46 29 30.33 30.27 30.20 10 9 6 14 5 21 0.00  
25 69 55 41 41 35 28 81 41 29 30.25 30.21 30.18 10 10 6 13 5 20 0.00  
26 68 54 41 43 34 28 70 48 28 30.22 30.18 30.14 10 10 5 7 2 - 0.00  
27 59 50 41 48 35 27 76 58 41 30.20 30.16 30.12 10 8 4 14 2 - 0.00  
28 60 48 35 46 39 28 100 75 29 30.13 30.09 30.04 10 7 2 18 6 20 0.00  
29 69 54 39 46 27 10 100 46 13 30.17 30.11 30.07 10 10 2 14 3 23 0.00  
30 62 48 35 48 37 25 100 68 32 30.27 30.21 30.16 10 8 1 9 2 - 0.00  
31 55 45 35 46 41 32 93 84 72 30.27 30.21 30.17 10 7 1 15 4 - 0.00