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Half Moon Bay Weather in 2009

Historical record of Half Moon Bay, California weather for the year 2009 based on NOAA data.
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2009 Half Moon Bay Weather Extremes
Highest temperature 84 °F August 28
Lowest temperature 28 °F December 8
Highest daily low 61 °F January 13
Lowest daily high 49 °F December 10
Most daily precipitation 2.9 inches October 13
Most daily snow none -
Total annual precipitation 21.7 inches -
Total annual snow none -
January 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
January 1
58 44 0.01
January 2
54 46 0.06
January 3
52 32 0.10
January 4
52 28 0.00
January 5
53 36 0.01
January 6
50 43 0.04
January 7
58 43 0.00
January 8
60 45 0.01
January 9
60 34 0.01
January 10
62 43 0.01
January 11
66 41 0.00
January 12
73 47 0.00
January 13
74 61 0.00
January 14
76 60 0.00
January 15
75 48 0.00
January 16
72 41 0.00
January 17
75 43 0.00
January 18
72 46 0.00
January 19
71 58 0.00
January 20
72 55 0.00
January 21
72 50 0.00
January 22
67 52 0.51
January 23
58 52 0.10
January 24
60 51 0.23
January 25
56 48 0.01
January 26
55 33 0.07
January 27
55 33 0.00
January 28
60 33 0.00
January 29
62 37 0.00
January 30
68 43 0.00
January 31
69 39 0.00
February 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
February 1
60 35 0.00
February 2
71 45 0.00
February 3
69 45 0.00
February 4
68 38 0.00
February 5
60 46 0.12
February 6
60 50 0.13
February 7
55 46 0.15
February 8
62 40 0.01
February 9
57 40 0.53
February 10
54 33 0.00
February 11
54 38 0.25
February 12
56 40 0.23
February 13
55 40 0.60
February 14
55 40 0.47
February 15
57 44 0.63
February 16
51 44 2.76
February 17
55 46 0.58
February 18
58 40 0.10
February 19
59 41 0.00
February 20
64 38 0.00
February 21
66 40 0.00
February 22
66 48 0.54
February 23
57 52 1.15
February 24
61 46 0.28
February 25
60 44 0.08
February 26
61 50 0.14
February 27
58 39 0.01
February 28
56 44 0.00
March 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
March 1
71 51 0.15
March 2
64 52 0.44
March 3
61 38 0.75
March 4
62 44 0.19
March 5
60 43 0.47
March 6
56 41 0.13
March 7
56 40 0.00
March 8
58 41 0.00
March 9
56 44 0.00
March 10
54 32 0.00
March 11
58 35 0.00
March 12
58 45 0.00
March 13
58 49 0.00
March 14
57 43 0.00
March 15
56 49 0.12
March 16
61 51 0.13
March 17
64 50 0.05
March 18
60 41 0.00
March 19
65 43 0.00
March 20
60 50 0.00
March 21
56 50 0.00
March 22
60 44 0.22
March 23
54 32 0.01
March 24
55 34 0.00
March 25
58 40 0.00
March 26
58 36 0.00
March 27
58 39 0.00
March 28
61 38 0.00
March 29
58 40 0.00
March 30
58 41 0.00
March 31
65 34 0.00
April 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
April 1
60 42 0.00
April 2
57 33 0.00
April 3
56 38 0.00
April 4
55 32 0.00
April 5
62 34 0.00
April 6
67 40 0.00
April 7
63 42 0.12
April 8
66 49 0.23
April 9
62 48 0.02
April 10
58 47 0.04
April 11
57 49 0.00
April 12
58 47 0.00
April 13
59 50 0.00
April 14
57 47 0.00
April 15
54 38 0.00
April 16
55 45 0.00
April 17
56 40 0.00
April 18
62 41 0.00
April 19
55 39 0.00
April 20
68 45 0.00
April 21
75 49 0.00
April 22
n/a 44 0.00
April 23
65 51 0.00
April 24
60 50 0.00
April 25
57 48 0.00
April 26
56 48 0.00
April 27
57 48 0.00
April 28
58 46 0.00
April 29
59 41 0.00
April 30
59 36 0.00
May 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
May 1
62 45 0.00
May 2
63 51 0.25
May 3
62 54 0.06
May 4
59 51 0.12
May 5
62 54 0.60
May 6
64 52 0.06
May 7
63 50 0.02
May 8
63 40 0.00
May 9
61 41 0.00
May 10
60 43 0.00
May 11
60 47 0.00
May 12
59 49 0.00
May 13
60 40 0.00
May 14
61 45 0.00
May 15
61 50 0.25
May 16
58 42 0.01
May 17
65 44 0.00
May 18
68 49 0.00
May 19
58 49 0.01
May 20
61 38 0.00
May 21
60 46 0.00
May 22
60 49 0.00
May 23
58 49 0.00
May 24
55 49 0.00
May 25
54 49 0.00
May 26
57 41 0.00
May 27
60 41 0.00
May 28
61 51 0.00
May 29
63 52 0.00
May 30
62 53 0.00
May 31
62 52 0.01
June 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
June 1
60 53 0.00
June 2
63 51 0.02
June 3
64 49 0.00
June 4
65 54 0.03
June 5
67 54 0.00
June 6
68 47 0.00
June 7
69 48 0.00
June 8
67 56 0.00
June 9
65 56 0.00
June 10
69 56 0.06
June 11
69 56 0.00
June 12
68 56 0.00
June 13
68 55 0.04
June 14
69 49 0.00
June 15
70 46 0.00
June 16
67 57 0.00
June 17
64 57 0.00
June 18
65 56 0.00
June 19
66 47 0.00
June 21
64 52 0.00
June 22
63 41 0.00
June 24
67 42 0.00
June 25
65 54 0.00
June 26
63 52 0.00
June 28
68 46 0.00
June 29
65 51 0.00
June 30
68 55 0.00
July 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
July 1
70 55 0.00
July 2
68 54 0.00
July 3
68 56 0.00
July 4
69 55 0.00
July 5
68 56 0.00
July 6
67 55 0.00
July 7
66 55 0.00
July 8
65 53 0.00
July 9
64 53 0.00
July 10
64 54 0.00
July 11
65 53 0.00
July 12
65 52 0.00
July 13
75 53 0.01
July 14
73 44 0.01
July 15
65 48 0.00
July 16
63 50 0.01
July 17
63 51 0.00
July 18
62 48 0.00
July 20
64 53 0.00
July 21
61 52 0.00
July 22
60 53 0.01
July 23
60 52 0.01
July 24
65 53 0.04
July 25
62 52 0.02
July 26
61 52 0.02
July 27
61 50 0.00
July 28
65 54 0.00
July 29
68 56 0.05
July 30
67 56 0.02
July 31
65 54 0.01
August 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
August 1
65 54 0.01
August 2
67 55 0.00
August 3
69 55 0.05
August 4
69 57 0.01
August 5
71 49 0.00
August 6
70 58 0.09
August 7
70 56 0.00
August 8
68 56 0.00
August 9
67 48 0.00
August 10
69 47 0.00
August 11
66 55 0.01
August 12
71 56 0.00
August 13
68 53 0.00
August 14
68 47 0.00
August 15
66 55 0.00
August 16
65 50 0.00
August 17
64 50 0.00
August 18
63 54 0.00
August 19
67 55 0.00
August 20
68 57 0.00
August 21
68 55 0.00
August 22
63 49 0.00
August 23
63 55 0.00
August 24
63 54 0.00
August 25
64 53 0.00
August 26
65 52 0.00
August 28
84 49 0.00
August 29
80 51 0.00
August 30
67 54 0.00
August 31
68 54 0.00
September 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
September 1
64 54 0.00
September 2
76 48 0.00
September 3
72 45 0.00
September 4
67 45 0.00
September 5
69 55 0.01
September 6
67 53 0.04
September 7
67 48 0.01
September 8
66 44 0.00
September 9
65 53 0.01
September 10
63 47 0.00
September 11
64 50 0.00
September 12
62 54 0.01
September 13
68 56 0.02
September 14
69 57 0.34
September 15
69 52 0.01
September 16
67 53 0.00
September 17
70 57 0.01
September 18
73 49 0.01
September 19
72 51 0.01
September 20
65 52 0.00
September 21
64 51 0.01
September 22
63 52 0.01
September 23
63 54 0.00
September 24
61 53 0.00
September 25
61 51 0.00
September 26
65 49 0.00
September 27
69 46 0.01
September 28
69 54 0.02
September 29
63 53 0.00
September 30
64 39 0.00
October 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
October 1
80 37 0.00
October 2
71 38 0.00
October 3
64 49 0.00
October 4
59 50 0.00
October 5
63 37 0.00
October 6
63 36 0.00
October 7
63 37 0.00
October 8
63 52 0.00
October 9
63 52 0.00
October 10
61 50 0.00
October 11
62 49 0.00
October 12
65 53 0.00
October 13
65 56 2.86
October 14
69 58 0.02
October 15
71 58 0.00
October 16
79 54 0.00
October 17
69 55 0.01
October 18
66 55 0.00
October 19
68 53 0.03
October 20
64 49 0.10
October 21
63 53 0.00
October 22
64 53 0.00
October 23
65 45 0.01
October 24
65 47 0.00
October 25
65 43 0.01
October 26
64 44 0.01
October 27
62 46 0.00
October 28
62 53 0.00
October 30
61 36 0.00
October 31
64 49 0.00
November 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
November 1
72 45 0.01
November 2
78 48 0.00
November 3
75 44 0.00
November 4
68 44 0.00
November 5
67 48 0.01
November 6
65 54 0.14
November 7
60 40 0.01
November 8
61 40 0.00
November 9
60 35 0.01
November 10
67 45 0.00
November 11
61 48 0.00
November 12
58 47 0.00
November 13
57 36 0.00
November 14
57 44 0.03
November 15
56 34 0.00
November 16
58 34 0.01
November 17
57 33 0.00
November 18
57 39 0.04
November 19
63 35 0.00
November 20
58 35 0.08
November 21
55 36 0.00
November 22
55 35 0.01
November 23
64 41 0.01
November 24
70 45 0.00
November 25
67 41 0.00
November 26
60 39 0.00
November 27
56 47 0.08
November 28
68 48 0.00
November 29
70 52 0.00
November 30
62 36 0.00
December 2009 Half Moon Bay Weather
Day High (°F) Low (°F) Precip. (inches)
December 1
60 41 0.00
December 2
51 42 0.00
December 3
60 37 0.00
December 4
53 39 0.01
December 5
54 34 0.00
December 6
53 31 0.00
December 7
51 38 0.40
December 8
49 28 0.01
December 9
50 32 0.00
December 10
49 31 0.02
December 11
56 40 0.37
December 12
59 51 0.55
December 13
58 51 0.30
December 14
56 42 0.02
December 15
60 41 0.00
December 16
58 48 0.12
December 17
63 50 0.01
December 18
66 47 0.00
December 19
65 48 0.00
December 20
62 47 0.00
December 21
58 49 0.13
December 22
55 46 0.08
December 23
59 37 0.00
December 24
62 34 0.00
December 25
62 38 0.00
December 26
60 36 0.00
December 27
57 46 0.41
December 28
57 47 0.00
December 29
55 34 0.00
December 30
56 46 0.23
December 31
60 46 0.00
Weather Station Details
Years Station Coordinates
1939–2022 Half Moon Bay location