Reporting Station : San Francisco International Airport, CA

There are alert 2 Weather Alerts for your area.
15°C

Partly sunny. Cool.

  • 84%
  • 22 km/hW
  • 84%
    Humidity
  • 12°C
    Dew Point
  • 14°C
    Comfort Level
  • 16 km
    Visibility
  • 1015.30 mb

    Barometric Pressure
  • Air Quality
Current Time : 12:17 PM PDT  Refresh Nearest / Estimated
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JULY 21ST, 1975-Six inches of rain fell across Mercer County NJ in just ten hours causing the worst flooding in twenty years. Assunpink Creek crested eleven feet above flood stage at Hamilton and Trenton, the highest level of record. Traffic was brought to a standstill, and railway service between New York City and Washington D.C. was cut off for two days. Flooding left 1000 persons homeless, and caused an estimated 25 million dollars damage.

Previously
JULY 21ST, 1975 Six inches of rain fell across Mercer County NJ in just ten hours causing the worst flooding in twenty years. Assunpink Creek crested eleven feet above flood stage at Hamilton and Trenton, the highest level of record. Traffic was brought to a standstill, and railway service between New York City and Washington D.C. was cut off for two days. Flooding left 1000 persons homeless, and caused an estimated 25 million dollars damage.
 
JULY 21ST, 1983 A record breaking low -128.6 F is recorded at the Soviet Union's Vostok Station, at Antartica.
 
JULY 20TH, 1977 At Johnstown, PA, where over 2,000 perished in a flood on May 31, 1889, another resulting from 8.5 in (216 mm) of rain falling in seven hours, drowns 76 and destroys property valued at $424 million.
 
JULY 20TH, 1930 The temperature at Washington D.C. soared to an all-time record of 106 degrees. The next day Millsboro reached 110 degrees to set a record for the state of Delaware. July 1930 was one of the hottest and driest summers in the U.S., particularly in the Missouri Valley where severe drought conditions developed. Toward the end of the month state records were set for Kentucky with 114 degrees, and Mississippi with 115 degrees.
 
JULY 19TH, 1886 Along the Florida peninsula, between Cedar Keys and Jacksonville, the third hurricane within a month causes extensive damages.
 
JULY 19TH, 1974 A severe thunderstorm with winds to 80 mph and up to two inches of rain washed out four to five foot deep sections of roadway in Lake Havasu City AZ. Three persons in a station wagon died as it was carried 3000 feet down a wash by a ten foot wall of water.
 
JULY 18TH, 1889 A cloudburst in West Virginia along the small creeks in Wirt County, Jackson County and Wood County claimed twenty lives. Rockport WV reported nineteen inches of rain in two hours and ten minutes that Thursday evening. Tygart Creek rose 22 feet in one hour, and villages were swept away on Tygart, Slate, Tucker, and Sandy Creeks.
 
JULY 18TH, 1942 A record deluge occurred at Smethport in northern Pennsylvania, with 30.7 inches in just six hours. The downpours and resultant flooding in Pennsylvania were devastating.
 
JULY 17TH, 1974 After striking a tree and passing through a chain, lightning kills Norma Jean, a 6500 lb. performing elephant tethered to a tree in the town square at Oquawka, IL where a circus had pitched a big top.
 
JULY 17TH, 1941 A prolonged heat wave over Washington State finally came to an end. Lightning from untimely thunderstorms was responsible for 598 forest fires.
 
JULY 16TH, 1946 The temperature at Medford OR soared to an all-time high of 115 degrees to begin a two week heat wave. During that Oregon heat wave the mercury hit 100 degrees at Sexton Summit for the only time in forty years of records.
 
Wind Advisory
Issued By NWS Field Office Broadcast Time Mon, 29 Dec 2014 03:43:00 PST
Issuing Time Mon, 29 Dec 2014 03:43:00 PST Valid Until Mon, 29 Dec 2014 03:43:00 PST

Strong northerly winds are forecast to develop across the San Francisco Bay Area by midday Tuesday and continue through midday Wednesday. A strong..cold and dry storm system will sweep into northern and central California late Monday night and Tuesday morning. This system will generate strong and gusty north to northest winds across the region from midday Tuesday through midday Wednesday.

History
Weather Station: San Francisco , CA , US
July Data Choose another month
Averages
Average High Temperature
13.30 °C
Average Low Temperature
7.80 °C
Average Mean Temp
10.60 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
10.41
Average Snowfall (US Only)
*
Daily Counts
Days With Precipitation
11
Days With Thunderstorms
*
Days With Fog
*
Days With Snow
0
Days With Lows Below Freezing
15
Days above 90° F (32.2° C)
0
Records
Record High
26.10 °C
Record Low
-1.10 °C
Record Wind Speed
-183.30 km/h
Record Monthly Snowfall
* cm
Record 24-hour Snowfall
* cm
Record Monthly Rainfall
272 mm
Record 24-hour Rainfall
81 mm
Record Minimum Monthly Precipitation
1.27 mm
Averages
Average High Temperature
15.60 °C
Average Low Temperature
8.90 °C
Average Mean Temp
12.20 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
8.88
Average Snowfall (US Only)
*
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
1
Days With Fog
1
Days With Snow
0
Days With Lows Below Freezing
7
Days above 90° F (32.2° C)
0
Records
Record High
27.20 °C
Record Low
-0.60 °C
Record Wind Speed
-183.30 km/h
Record Monthly Snowfall
* cm
Record 24-hour Snowfall
* cm
Record Monthly Rainfall
256 mm
Record 24-hour Rainfall
53 mm
Record Minimum Monthly Precipitation
* mm
Averages
Average High Temperature
16.10 °C
Average Low Temperature
9.40 °C
Average Mean Temp
12.80 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
7.36
Average Snowfall (US Only)
*
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
*
Days With Fog
0
Days With Snow
0
Days With Lows Below Freezing
4
Days above 90° F (32.2° C)
0
Records
Record High
28.90 °C
Record Low
1.70 °C
Record Wind Speed
-183.30 km/h
Record Monthly Snowfall
* cm
Record 24-hour Snowfall
* cm
Record Monthly Rainfall
228 mm
Record 24-hour Rainfall
63 mm
Record Minimum Monthly Precipitation
* mm
Averages
Average High Temperature
17.20 °C
Average Low Temperature
10.00 °C
Average Mean Temp
13.30 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
3.81
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
6
Days With Thunderstorms
1
Days With Fog
0
Days With Snow
0
Days With Lows Below Freezing
2
Days above 90° F (32.2° C)
*
Records
Record High
34.40 °C
Record Low
4.40 °C
Record Wind Speed
16.70 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
140 mm
Record 24-hour Rainfall
51 mm
Record Minimum Monthly Precipitation
* mm
Averages
Average High Temperature
17.80 °C
Average Low Temperature
10.60 °C
Average Mean Temp
14.40 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
1.27
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
3
Days With Thunderstorms
0
Days With Fog
0
Days With Snow
0
Days With Lows Below Freezing
*
Days above 90° F (32.2° C)
*
Records
Record High
35.60 °C
Record Low
6.70 °C
Record Wind Speed
-183.30 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
102 mm
Record 24-hour Rainfall
36 mm
Record Minimum Monthly Precipitation
0.00 mm
Averages
Average High Temperature
18.90 °C
Average Low Temperature
11.70 °C
Average Mean Temp
15.60 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
0.51
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
1
Days With Thunderstorms
*
Days With Fog
0
Days With Snow
0
Days With Lows Below Freezing
0
Days above 90° F (32.2° C)
*
Records
Record High
38.30 °C
Record Low
8.30 °C
Record Wind Speed
-183.30 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
36 mm
Record 24-hour Rainfall
33 mm
Record Minimum Monthly Precipitation
0.00 mm
Averages
Average High Temperature
18.90 °C
Average Low Temperature
12.20 °C
Average Mean Temp
15.60 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
*
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
1
Days With Thunderstorms
1
Days With Fog
0
Days With Snow
0
Days With Lows Below Freezing
0
Days above 90° F (32.2° C)
*
Records
Record High
39.40 °C
Record Low
8.30 °C
Record Wind Speed
-183.30 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
5 mm
Record 24-hour Rainfall
3 mm
Record Minimum Monthly Precipitation
0.00 mm
Averages
Average High Temperature
18.90 °C
Average Low Temperature
12.20 °C
Average Mean Temp
16.10 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
*
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
1
Days With Thunderstorms
1
Days With Fog
0
Days With Snow
0
Days With Lows Below Freezing
0
Days above 90° F (32.2° C)
*
Records
Record High
35.60 °C
Record Low
8.90 °C
Record Wind Speed
-183.30 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
13 mm
Record 24-hour Rainfall
13 mm
Record Minimum Monthly Precipitation
0.00 mm
Averages
Average High Temperature
21.10 °C
Average Low Temperature
13.30 °C
Average Mean Temp
17.20 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
0.51
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
1
Days With Thunderstorms
*
Days With Fog
0
Days With Snow
0
Days With Lows Below Freezing
0
Days above 90° F (32.2° C)
1
Records
Record High
38.30 °C
Record Low
8.90 °C
Record Wind Speed
-183.30 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
53 mm
Record 24-hour Rainfall
51 mm
Record Minimum Monthly Precipitation
0.00 mm
Averages
Average High Temperature
20.60 °C
Average Low Temperature
12.80 °C
Average Mean Temp
16.70 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
2.79
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
4
Days With Thunderstorms
1
Days With Fog
0
Days With Snow
0
Days With Lows Below Freezing
*
Days above 90° F (32.2° C)
*
Records
Record High
38.90 °C
Record Low
6.10 °C
Record Wind Speed
16.70 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
140 mm
Record 24-hour Rainfall
58 mm
Record Minimum Monthly Precipitation
* mm
Averages
Average High Temperature
17.80 °C
Average Low Temperature
10.60 °C
Average Mean Temp
14.40 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
6.60
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
8
Days With Thunderstorms
*
Days With Fog
0
Days With Snow
0
Days With Lows Below Freezing
1
Days above 90° F (32.2° C)
0
Records
Record High
30.00 °C
Record Low
3.90 °C
Record Wind Speed
-183.30 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
208 mm
Record 24-hour Rainfall
63 mm
Record Minimum Monthly Precipitation
0.00 mm
Averages
Average High Temperature
13.90 °C
Average Low Temperature
8.30 °C
Average Mean Temp
11.10 °C
Average Dew Point
* °C
Average Windspeed
* km/h
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
9.90
Average Snowfall (US Only)
*
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
0
Days With Fog
0
Days With Snow
*
Days With Lows Below Freezing
11
Days above 90° F (32.2° C)
0
Records
Record High
24.40 °C
Record Low
-2.80 °C
Record Wind Speed
16.70 km/h
Record Monthly Snowfall
2.5 cm
Record 24-hour Snowfall
2.50 cm
Record Monthly Rainfall
292 mm
Record 24-hour Rainfall
79 mm
Record Minimum Monthly Precipitation
0.00 mm
Day   Reason Upper Soil Moisture Lower Soil Moisture
Sunday cw_fire_moderate
Fire danger moderate 21% 24%
Monday cw_fire_low
Fire danger low 21% 24%
Tuesday cw_fire_low
Fire danger low 21% 24%
Wednesday cw_fire_moderate
Fire danger moderate 21% 24%
Thursday cw_fire_moderate
Fire danger moderate 21% 24%
Friday cw_fire_moderate
Fire danger moderate 21% 24%
Snow conditions provided by SnoCountry Mountain Reports™

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