San Francisco, CA

2:15 PM PDT on September 22, 2019 (GMT -0700)
San Francisco International

Weather History for KSFO - May, 2019

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Saturday, May 18, 2019

  Actual Average Record
Temperature  
Mean Temperature 53 °F 60 °F  
Max Temperature 56 °F 68 °F 85 °F (1978)
Min Temperature 50 °F 52 °F 42 °F (1974)
Degree Days  
Heating Degree Days 12 6  
Month to date heating degree days 112 114  
Since 1 July heating degree days 2231 2482  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 9 6  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 49 °F    
Average Humidity 80    
Maximum Humidity 93    
Minimum Humidity 66    
Precipitation  
Precipitation 0.84 in 0.02 in 1.23 in (1957)
Month to date precipitation 1.60 0.33  
Year to date precipitation 18.03 12.83  
Sea Level Pressure  
Sea Level Pressure 29.88 in    
Wind  
Wind Speed 10 mph (SSE)    
Max Wind Speed 30 mph    
Max Gust Speed 33 mph    
Visibility 8 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Astronomy

May. 18, 2019 Rise Set
Actual Time 5:57 AM PDT 8:14 PM PDT
Civil Twilight 5:28 AM PDT 8:44 PM PDT
Nautical Twilight 4:51 AM PDT 9:20 PM PDT
Astronomical Twilight 4:12 AM PDT 10:00 PM PDT
Moon 8:16 PM PDT (5/18) 6:06 AM PDT (5/18)
Length of Visible Light 15h 16m
Length of Day
14h 16m
Full, 100% of the Moon is Illuminated
May 18
Full
May 18
Full
May 26
Last Quarter
Jun 3
New
Jun 9
First Quarter

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 53.1 °F 46.0 °F 77% 30.05 in 10.0 mi WSW 5.8 mph - N/A   Scattered Clouds
1:56 AM 53.1 °F 46.0 °F 77% 30.02 in 10.0 mi SSW 5.8 mph - N/A   Scattered Clouds
2:56 AM 53.1 °F 46.0 °F 77% 30.00 in 10.0 mi South 4.6 mph - N/A   Scattered Clouds
3:56 AM 52.0 °F 46.0 °F 80% 29.99 in 10.0 mi SW 4.6 mph - N/A   Scattered Clouds
4:56 AM 53.1 °F 46.0 °F 77% 29.97 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy
5:56 AM 51.1 °F 46.9 °F 86% 29.95 in 10.0 mi SSE 6.9 mph - N/A   Mostly Cloudy
6:56 AM 53.1 °F 46.0 °F 77% 29.95 in 10.0 mi South 4.6 mph - N/A   Mostly Cloudy
7:56 AM 54.0 °F 45.0 °F 72% 29.95 in 10.0 mi SE 9.2 mph - N/A   Mostly Cloudy
8:56 AM 55.9 °F 45.0 °F 67% 29.94 in 10.0 mi South 10.4 mph - N/A   Overcast
9:56 AM 55.0 °F 45.0 °F 69% 29.93 in 10.0 mi South 8.1 mph - N/A   Overcast
10:56 AM 55.9 °F 45.0 °F 67% 29.92 in 10.0 mi SSE 9.2 mph - N/A   Overcast
11:56 AM 55.9 °F 46.9 °F 72% 29.94 in 10.0 mi South 10.4 mph - 0.01 in Rain Light Rain
12:56 PM 54.0 °F 48.0 °F 80% 29.94 in 6.0 mi ESE 12.7 mph - 0.07 in Rain Rain
1:56 PM 54.0 °F 48.9 °F 83% 29.92 in 8.0 mi SE 13.8 mph - 0.05 in Rain Light Rain
2:56 PM 55.9 °F 50.0 °F 80% 29.91 in 10.0 mi SE 10.4 mph - 0.00 in   Overcast
3:56 PM 55.0 °F 50.0 °F 83% 29.90 in 7.0 mi SE 9.2 mph - 0.08 in Rain Rain
4:32 PM 55.0 °F 50.0 °F 83% 29.83 in 7.0 mi ESE 25.3 mph - 0.08 in Rain Rain
4:56 PM 53.1 °F 50.0 °F 89% 29.84 in 9.0 mi SE 23.0 mph 33.4 mph 0.09 in   Overcast
5:56 PM 53.1 °F 50.0 °F 89% 29.81 in 9.0 mi SE 18.4 mph - 0.04 in Rain Light Rain
6:56 PM 53.1 °F 51.1 °F 93% 29.79 in 3.0 mi SE 15.0 mph - 0.06 in Rain Light Rain
7:56 PM 55.0 °F 50.0 °F 83% 29.78 in 10.0 mi SE 15.0 mph - 0.04 in   Overcast
8:56 PM 55.0 °F 51.1 °F 86% 29.78 in 5.0 mi SE 13.8 mph 21.9 mph 0.04 in Rain Light Rain
9:56 PM 55.0 °F 51.1 °F 86% 29.76 in 7.0 mi SE 13.8 mph - 0.01 in Rain Light Rain
10:56 PM 55.0 °F 52.0 °F 89% 29.77 in 3.0 mi South 6.9 mph - 0.10 in Rain Rain
11:01 PM 54.0 °F 51.1 °F 90% 29.77 in 2.5 mi SSE 9.2 mph - 0.05 in Rain Heavy Rain
11:15 PM 54.0 °F 51.1 °F 90% 29.77 in 4.0 mi ESE 8.1 mph - 0.14 in Rain Light Rain
11:22 PM 54.0 °F 51.1 °F 90% 29.77 in 4.0 mi ESE 8.1 mph - 0.14 in Rain Light Rain
11:44 PM 55.0 °F 51.1 °F 86% 29.77 in 7.0 mi SE 4.6 mph - 0.15 in Rain Rain
11:56 PM 54.0 °F 52.0 °F 93% 29.77 in 3.0 mi ESE 3.5 mph - 0.21 in Rain Rain