History for San Francisco, CA

Month of December, 2011 — View Current Conditions
Month of December, 2011
« Previous Month
Next Month »
Daily Weekly Monthly Custom
  Max Avg Min Sum
Temperature
Max Temperature 71 °F 57 °F 51 °F
Mean Temperature 63 °F 49 °F 44 °F
Min Temperature 56 °F 42 °F 36 °F
Degree Days
Heating Degree Days (base 65) 21 16 2 482
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 13 1 0 32
Dew Point
Dew Point 52 °F 38 °F 13 °F
Precipitation
Precipitation 0.06 in 0.00 in 0.00 in 0.13 in
Snowdepth - - - -
Wind
Wind 30 mph 5 mph 0 mph
Gust Wind 36 mph 28 mph 18 mph
Sea Level Pressure
Sea Level Pressure 30.58 in 30.20 in 29.75 in
Monthly Graph
Certify This Report
History Location
Airport:
 
Trip Planner
Search our historical database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it will be!
Date:
Astronomy
May. 20, 2013 Rise Set
Actual Time 7:21 AM PST 4:54 PM PST
Civil Twilight 6:51 AM PST 5:24 PM PST
Nautical Twilight 6:18 AM PST 5:57 PM PST
Astronomical Twilight 5:47 AM PST 6:29 PM PST
Moon 5:11 AM PST (12/22) 3:10 PM PST (12/22)
Length Of Visible Light 10h 32m
Length of Day
9h 33m
Waning Crescent, 5% of the Moon is Illuminated
Dec 22
Waning Crescent
Dec 24
New
Dec 31
First Quarter
Jan 8
Full
Jan 16
Last Quarter
Visit Astronomy
Monthly Calendar Overview
Print This Calendar Precipitation: Actual month total 0.13 Normal month total 4.03
« Previous Month « 2010 December 2011 2012 » Next Month »
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
1 Clear
Actual: 63 | 56
Precip: 0.00
Average: 59 | 46
Precip: 0.11
2 Scattered Clouds
Actual: 71 | 54
Precip: 0.00
Average: 59 | 46
Precip: 0.10
3 Clear
Actual: 61 | 47
Precip: 0.00
Average: 58 | 46
Precip: 0.11
4 Scattered Clouds
Actual: 58 | 42
Precip: 0.00
Average: 58 | 46
Precip: 0.11
5 Scattered Clouds
Actual: 57 | 41
Precip: 0.00
Average: 58 | 46
Precip: 0.11
6 Partly Cloudy
Actual: 54 | 39
Precip: 0.00
Average: 58 | 46
Precip: 0.11
7 Scattered Clouds
Actual: 55 | 39
Precip: 0.00
Average: 58 | 45
Precip: 0.13
8 Partly Cloudy
Actual: 57 | 39
Precip: 0.00
Average: 57 | 45
Precip: 0.12
9 Clear
Actual: 58 | 39
Precip: 0.00
Average: 57 | 45
Precip: 0.12
10 Scattered Clouds
Actual: 57 | 40
Precip: 0.00
Average: 57 | 45
Precip: 0.11
11 Rain
Actual: 53 | 43
Precip: 0.01
Average: 57 | 45
Precip: 0.12
12 Rain
Actual: 51 | 43
Precip: 0.06
Average: 57 | 45
Precip: 0.12
13 Scattered Clouds
Actual: 56 | 39
Precip: 0.00
Average: 57 | 45
Precip: 0.12
14 Partly Cloudy
Actual: 52 | 40
Precip: 0.00
Average: 57 | 45
Precip: 0.13
15 Rain
Actual: 53 | 43
Precip: 0.06
Average: 56 | 45
Precip: 0.13
16 Scattered Clouds
Actual: 62 | 38
Precip: 0.00
Average: 56 | 44
Precip: 0.13
17 Clear
Actual: 55 | 39
Precip: 0.00
Average: 56 | 44
Precip: 0.13
18 Fog
Actual: 53 | 40
Precip: 0.00
Average: 56 | 44
Precip: 0.14
19 Rain
Actual: 59 | 45
Precip: T
Average: 56 | 44
Precip: 0.14
20 Scattered Clouds
Actual: 60 | 40
Precip: 0.00
Average: 56 | 44
Precip: 0.15
21 Clear
Actual: 60 | 39
Precip: 0.00
Average: 56 | 44
Precip: 0.15
22 Scattered Clouds
Actual: 57 | 39
Precip: 0.00
Average: 56 | 44
Precip: 0.15
23 Scattered Clouds
Actual: 52 | 36
Precip: 0.00
Average: 56 | 44
Precip: 0.15
24 Scattered Clouds
Actual: 57 | 36
Precip: 0.00
Average: 56 | 44
Precip: 0.15
25 Scattered Clouds
Actual: 52 | 36
Precip: 0.00
Average: 56 | 44
Precip: 0.15
26 Partly Cloudy
Actual: 52 | 39
Precip: 0.00
Average: 56 | 44
Precip: 0.14
27 Partly Cloudy
Actual: 57 | 45
Precip: 0.00
Average: 56 | 44
Precip: 0.14
28 Partly Cloudy
Actual: 59 | 43
Precip: 0.00
Average: 56 | 44
Precip: 0.14
29 Fog
Actual: 56 | 46
Precip: 0.00
Average: 56 | 44
Precip: 0.14
30 Partly Cloudy
Actual: 54 | 49
Precip: 0.00
Average: 56 | 44
Precip: 0.14
31 Partly Cloudy
Actual: 57 | 43
Precip: 0.00
Average: 56 | 44
Precip: 0.14
 
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 Observations
2011 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 63 60 56 37 33 30 44 38 32 30.24 30.15 30.06 10 10 10 30 18 36 0.00  
2 71 63 54 45 32 21 66 41 16 30.05 30.01 29.96 10 10 9 30 10 33 0.00  
3 61 54 47 39 30 18 55 40 24 30.28 30.16 30.05 10 10 10 25 12 31 0.00  
4 58 50 42 45 35 18 86 56 26 30.30 30.22 30.15 10 10 10 15 5 17 0.00  
5 57 49 41 41 34 26 76 54 32 30.32 30.23 30.17 10 10 10 24 8 28 0.00  
6 54 47 39 41 36 31 82 66 50 30.42 30.36 30.33 10 10 8 12 4 15 0.00  
7 55 47 39 45 38 30 86 67 47 30.35 30.25 30.16 10 9 8 18 5 21 0.00  
8 57 48 39 45 40 36 89 68 47 30.18 30.15 30.11 10 9 6 8 2 12 0.00  
9 58 49 39 44 37 34 92 68 43 30.23 30.18 30.15 10 8 6 6 2 8 0.00  
10 57 49 40 45 41 34 89 78 66 30.17 30.11 30.04 8 6 5 16 4 18 0.00  
11 53 48 43 43 41 38 86 70 54 30.04 29.93 29.84 10 9 6 13 4 16 0.01 Rain
12 51 47 43 43 41 38 86 75 63 29.89 29.80 29.75 10 10 9 14 4 15 0.06 Rain
13 56 48 39 44 40 36 89 78 66 30.15 30.03 29.91 10 8 4 17 5 21 0.00  
14 52 46 40 45 41 37 92 82 71 30.31 30.25 30.17 10 10 8 13 4 15 0.00  
15 53 48 43 45 42 39 93 81 68 30.27 30.23 30.19 10 9 6 18 7 21 0.06 Rain
16 62 50 38 41 37 32 92 64 35 30.27 30.20 30.14 10 10 10 16 4 18 0.00  
17 55 47 39 46 39 34 86 70 54 30.19 30.14 30.10 10 10 9 9 4 12 0.00  
18 53 47 40 45 41 33 89 80 70 30.22 30.16 30.12 10 10 9 15 5 17 0.00 Fog
19 59 52 45 45 42 38 86 67 47 30.12 30.08 30.03 10 10 8 15 4 17 T Rain
20 60 50 40 42 34 28 83 56 29 30.12 30.07 30.04 10 10 10 9 3 12 0.00  
21 60 50 39 41 35 32 82 59 36 30.17 30.10 30.06 10 10 9 9 2 10 0.00  
22 57 48 39 36 24 13 65 41 17 30.49 30.33 30.18 10 10 10 23 8 28 0.00  
23 52 44 36 40 31 25 82 64 46 30.58 30.52 30.48 10 10 10 12 2 13 0.00  
24 57 47 36 41 32 27 85 62 38 30.50 30.44 30.38 10 10 7 10 2 12 0.00  
25 52 44 36 41 35 28 85 73 61 30.45 30.38 30.32 9 7 5 8 2 9 0.00  
26 52 46 39 45 41 34 89 80 71 30.38 30.32 30.30 10 7 3 15 4 18 0.00  
27 57 51 45 46 41 37 86 71 55 30.37 30.34 30.30 10 9 4 14 4 16 0.00  
28 59 51 43 52 45 38 96 77 57 30.39 30.33 30.30 10 10 7 17 4 21 0.00  
29 56 51 46 52 49 45 100 92 83 30.29 30.22 30.14 10 4 0 16 4 18 0.00 Fog
30 54 52 49 52 50 46 96 91 86 30.24 30.19 30.15 10 9 3 18 5 21 0.00  
31 57 50 43 45 39 33 96 68 40 30.24 30.20 30.15 10 10 10 10 5 - 0.00  
Comma Delimited File