Weather History for Half Moon Bay, CA

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Month of January, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 68 °F 57 °F 50 °F
Mean Temperature 57 °F 49 °F 42 °F
Min Temperature 50 °F 40 °F 32 °F
Degree Days  
Heating Degree Days (base 65) 22 16 8 504
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 7 1 0 33
Dew Point  
Dew Point 55 °F 38 °F 10 °F
Precipitation  
Precipitation 0.12 in 0.01 in 0.00 in 0.28 in
Snowdepth - - - -
Wind  
Wind 26 mph 6 mph 0 mph
Gust Wind 36 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.48 in 30.19 in 29.96 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Jan. 11, 2013 Rise Set
Actual Time 7:24 AM PST 5:12 PM PST
Civil Twilight 6:55 AM PST 5:40 PM PST
Nautical Twilight 6:23 AM PST 6:13 PM PST
Astronomical Twilight 5:51 AM PST 6:44 PM PST
Moon 7:02 AM PST (1/11) 5:35 PM PST (1/11)
Length of Visible Light 10h 45m
Length of Day
9h 47m
New Moon, 0% of the Moon is Illuminated
Jan 11
New Moon
Jan 18
First Quarter
Jan 26
Full
Feb 3
Last Quarter
Feb 9
New

Weather History Calendar

Precipitation Actual month total 0.28 Average Month Total: 5.51
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
51 | 37 0.02
Average:
58 | 41 0.11
Clear
Actual:
59 | 37 0.00
Average:
58 | 42 0.20
Scattered Clouds
Actual:
57 | 33 0.00
Average:
57 | 42 0.16
Scattered Clouds
Actual:
55 | 37 0.00
Average:
57 | 42 0.30
Rain
Actual:
55 | 39 0.08
Average:
56 | 42 0.24
Rain
Actual:
53 | 42 0.01
Average:
56 | 41 0.08
Partly Cloudy
Actual:
55 | 41 0.00
Average:
56 | 41 0.10
Fog
Actual:
60 | 41 0.00
Average:
56 | 42 0.17
Rain
Actual:
53 | 41 0.04
Average:
57 | 43 0.13
Rain
Actual:
50 | 44 0.00
Average:
57 | 43 0.11
Partly Cloudy
Actual:
50 | 42 0.00
Average:
57 | 42 0.24
Rain
Actual:
50 | 35 0.00
Average:
57 | 44 0.18
Clear
Actual:
50 | 35 0.00
Average:
58 | 43 0.20
Clear
Actual:
50 | 35 0.00
Average:
59 | 45 0.15
Clear
Actual:
57 | 32 0.00
Average:
59 | 44 0.27
Clear
Actual:
57 | 37 0.00
Average:
60 | 45 0.26
Clear
Actual:
66 | 41 0.00
Average:
60 | 44 0.10
Clear
Actual:
64 | 37 0.00
Average:
59 | 44 0.27
Clear
Actual:
68 | 39 0.00
Average:
60 | 44 0.11
Clear
Actual:
68 | 41 0.00
Average:
59 | 43 0.10
Clear
Actual:
66 | 41 0.00
Average:
59 | 44 0.28
Clear
Actual:
62 | 37 0.00
Average:
59 | 43 0.25
Rain
Actual:
60 | 50 0.12
Average:
58 | 42 0.10
Mostly Cloudy
Actual:
60 | 50 0.01
Average:
58 | 43 0.24
Partly Cloudy
Actual:
64 | 50 0.00
Average:
59 | 42 0.13
Rain
Actual:
53 | 48 0.00
Average:
59 | 43 0.11
Scattered Clouds
Actual:
53 | 46 0.00
Average:
59 | 42 0.24
Partly Cloudy
Actual:
53 | 48 0.00
Average:
59 | 42 0.11
Partly Cloudy
Actual:
53 | 39 0.00
Average:
59 | 42 0.26
Partly Cloudy
Actual:
55 | 37 0.00
Average:
59 | 42 0.18
Scattered Clouds
Actual:
62 | 37 0.00
Average:
58 | 41 0.13
 

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
Jan high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 51 44 37 43 35 27 93 68 38 30.26 30.23 30.21 10 10 2 20 6 25 0.02 Rain
2 59 48 37 37 31 25 81 52 31 30.22 30.18 30.13 10 10 9 9 3 - 0.00  
3 57 45 33 43 35 27 87 70 51 30.26 30.21 30.15 10 9 3 10 3 - 0.00  
4 55 46 37 43 37 32 93 72 47 30.27 30.23 30.19 10 9 5 8 2 - 0.00  
5 55 47 39 50 45 36 100 85 67 30.26 30.18 30.08 10 8 1 20 8 28 0.08 Rain
6 53 48 42 46 44 41 93 84 62 30.21 30.15 30.04 10 8 3 17 7 25 0.01 Rain
7 55 48 41 52 46 39 100 89 77 30.27 30.21 30.18 10 7 2 14 6 18 0.00  
8 60 50 41 50 47 41 100 89 63 30.23 30.18 30.13 10 5 0 16 3 21 0.00 Fog
9 53 47 41 50 43 37 100 86 66 30.14 30.10 30.04 10 7 1 24 7 36 0.04 Rain
10 50 47 44 37 37 32 76 67 57 30.22 30.14 30.10 10 10 6 26 17 36 0.00 Rain
11 50 46 42 41 37 32 81 68 57 30.27 30.20 30.15 10 10 8 24 16 32 0.00  
12 50 42 35 36 31 23 87 65 37 30.26 30.20 30.16 10 10 9 13 4 - 0.00 Rain
13 50 42 35 32 25 14 87 52 31 30.28 30.22 30.19 10 10 10 13 6 18 0.00  
14 50 42 35 32 19 10 87 44 24 30.41 30.36 30.23 10 10 10 15 5 26 0.00  
15 57 44 32 39 30 25 100 65 31 30.48 30.43 30.41 10 10 10 13 3 - 0.00  
16 57 47 37 36 31 27 76 54 36 30.43 30.34 30.24 10 10 8 14 6 17 0.00  
17 66 54 41 41 32 25 70 45 28 30.24 30.17 30.13 10 10 9 15 5 21 0.00  
18 64 50 37 48 36 30 81 61 37 30.19 30.15 30.13 10 10 5 10 2 - 0.00  
19 68 54 39 46 32 19 77 46 20 30.21 30.16 30.14 10 9 2 14 3 21 0.00  
20 68 54 41 34 29 23 70 35 23 30.19 30.15 30.11 10 10 8 13 4 17 0.00  
21 66 54 41 45 31 18 70 41 18 30.14 30.10 30.05 10 9 4 10 3 - 0.00  
22 62 50 37 45 36 28 75 58 37 30.09 30.05 30.00 10 9 2 10 2 - 0.00  
23 60 55 50 52 41 27 100 64 29 30.09 30.03 29.96 10 8 1 12 4 - 0.12 Rain
24 60 55 50 52 50 50 100 86 68 30.20 30.13 30.07 10 5 1 8 2 - 0.01  
25 64 57 50 55 51 48 100 85 72 30.20 30.12 30.06 10 7 1 20 4 28 0.00  
26 53 50 48 50 46 41 100 81 71 30.11 30.07 30.04 10 8 0 22 13 26 0.00 Fog , Rain
27 53 50 46 41 40 36 76 70 54 30.20 30.15 30.10 10 9 6 23 17 34 0.00  
28 53 50 48 45 43 39 87 78 62 30.32 30.25 30.19 10 9 5 24 18 34 0.00  
29 53 46 39 46 44 39 100 83 67 30.38 30.33 30.31 10 7 4 21 14 36 0.00  
30 55 47 37 48 45 37 100 89 72 30.36 30.31 30.28 10 6 2 12 4 - 0.00  
31 62 50 37 48 41 36 100 79 45 30.29 30.24 30.18 10 8 5 16 3 22 0.00