Template:San Francisco weatherbox
| Climate data for San Francisco (downtown),[a] 1981–2010 normals,[b] extremes 1849–present | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 79 (26) |
81 (27) |
87 (31) |
94 (34) |
97 (36) |
103 (39) |
98 (37) |
98 (37) |
106 (41) |
102 (39) |
86 (30) |
76 (24) |
106 (41) |
| Mean maximum °F (°C) | 67.3 (19.6) |
72.5 (22.5) |
75.7 (24.3) |
82.3 (27.9) |
82.7 (28.2) |
86.0 (30.0) |
83.1 (28.4) |
85.5 (29.7) |
89.6 (32.0) |
88.1 (31.2) |
76.1 (24.5) |
66.4 (19.1) |
94.3 (34.6) |
| Mean daily maximum °F (°C) | 56.9 (13.8) |
60.2 (15.7) |
61.8 (16.6) |
63.1 (17.3) |
64.3 (17.9) |
66.4 (19.1) |
66.5 (19.2) |
68.1 (20.1) |
70.2 (21.2) |
69.2 (20.7) |
63.1 (17.3) |
57.1 (13.9) |
63.9 (17.7) |
| Daily mean °F (°C) | 51.3 (10.7) |
53.9 (12.2) |
55.1 (12.8) |
56.2 (13.4) |
57.6 (14.2) |
59.6 (15.3) |
60.3 (15.7) |
61.6 (16.4) |
62.7 (17.1) |
61.5 (16.4) |
56.6 (13.7) |
51.6 (10.9) |
57.3 (14.1) |
| Mean daily minimum °F (°C) | 45.7 (7.6) |
47.5 (8.6) |
48.5 (9.2) |
49.2 (9.6) |
51.0 (10.6) |
52.8 (11.6) |
54.1 (12.3) |
55.1 (12.8) |
55.1 (12.8) |
53.7 (12.1) |
50.1 (10.1) |
46.1 (7.8) |
50.7 (10.4) |
| Mean minimum °F (°C) | 40.3 (4.6) |
41.8 (5.4) |
43.6 (6.4) |
45.1 (7.3) |
47.7 (8.7) |
50.2 (10.1) |
51.5 (10.8) |
52.6 (11.4) |
52.0 (11.1) |
49.6 (9.8) |
44.2 (6.8) |
40.1 (4.5) |
38.2 (3.4) |
| Record low °F (°C) | 29 (−2) |
31 (−1) |
33 (1) |
40 (4) |
42 (6) |
46 (8) |
47 (8) |
46 (8) |
47 (8) |
43 (6) |
38 (3) |
27 (−3) |
27 (−3) |
| Average rainfall inches (mm) | 4.50 (114) |
4.46 (113) |
3.26 (83) |
1.46 (37) |
0.70 (18) |
0.16 (4.1) |
0.00 (0.00) |
0.06 (1.5) |
0.21 (5.3) |
1.12 (28) |
3.16 (80) |
4.56 (116) |
23.65 (601) |
| Average rainy days (≥ 0.01 in) | 11.7 | 11.1 | 11.0 | 6.5 | 3.8 | 1.5 | 0.3 | 1.0 | 1.7 | 3.9 | 8.9 | 11.6 | 73.0 |
| Average relative humidity (%) | 80 | 77 | 75 | 72 | 72 | 71 | 75 | 75 | 73 | 71 | 75 | 78 | 75 |
| Mean monthly sunshine hours | 185.9 | 207.7 | 269.1 | 309.3 | 325.1 | 311.4 | 313.3 | 287.4 | 271.4 | 247.1 | 173.4 | 160.6 | 3,061.7 |
| Percent possible sunshine | 61 | 69 | 73 | 78 | 74 | 70 | 70 | 68 | 73 | 71 | 57 | 54 | 69 |
| Source 1: NOAA (sun 1961–1974)[1][2][3] | |||||||||||||
| Source 2: Met Office for humidity[4] | |||||||||||||
- ^ The coordinates of the station are 37°46′14″N 122°25′37″W / 37.7706°N 122.4269°W. Precipitation, high temperature, low temperature, snow, and snow depth records date from 1 October 1849, 1 June 1874, 1 January 1875, 1 January 1876, and 1 January 1922, respectively.
- ^ Mean monthly maxima and minima (i.e. the expected highest and lowest temperature readings at any point during the year or given month) calculated based on data at said location from 1981 to 2010.
- ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved 2016-04-17.
- ^ "Station Name: CA SAN FRANCISCO DWTN". National Oceanic and Atmospheric Administration. Retrieved 2014-03-18.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ "San Francisco/Mission Dolores, CA Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved April 23, 2013.
- ^ "San Francisco holiday weather". Met Office. Retrieved September 18, 2017.