Temperature
84 F at 2 PM; 84 F at its warmest, 2 PM, and 58 F at its coolest, 4 AM.
- Now
- 84F
- 2 PM
- Highest
- 84F
- 2 PM
- Lowest
- 58F
- 4 AM
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Airports/California/San Francisco International Airport
San Francisco International Airport, California
Large airport in San Mateo County, California82°
88°/59°
Clear·
Feels like 80°·Light air 2 mph WNW
Now. San Francisco International Airport is 82° and clear at 3 PM. The dew point is 45°, so the air feels dry and comfortable. Light air from the west-northwest at 2 mph.
Today and tonight. It warms to about 88° by 3 PM. Tonight falls to about 59° by 7 AM, under a mostly clear sky. No rain is expected for the rest of the day.
The week. The warmest day ahead is tomorrow, near 83°, and the coolest Monday, near 64°. Rain is possible Tuesday (38%). The windiest day is Monday, with wind to 23 mph.
The sky tonight. The sun sets at 6:31 PM. The Moon is a waxing crescent, 34% lit, and sets at 10:39 PM. The next full Moon is Sunday, Oct 25. After dark, look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 13 minutes long, 3 minutes shorter than yesterday.
4UV Moderate
36Air quality
25%Humidity
0%Cloud
Now
3:00 PM
82feels80
now, clear
Today
Oct 16
8859
UV 6
Sat
Oct 17
8359
14mph
UV 6
Sun
Oct 18
6856
21mph
Mon
Oct 19
6455
28%
23mph
Tue
Oct 20
6754
38%
Wed
Oct 21
6954
25%
15mph
Thu
Oct 22
6755
11%
20mph
82°
88°59°
83°59°
68°56°
64°55°
67°54°
69°54°
67°55°
As of 3:00 PM in San Francisco International Airport, California.
Air quality
The air at San Francisco International Airport
Index 36, good, led by fine particles. Read at 2 PM from its reporting area, San Francisco (CA), 10 miles off.
36Good
- Fine particles (PM2.5)36Good10.2 mi
- Ozone31Good45 ppb10.2 mi
- Nitrogen dioxide6Good6.8 ppb10.2 mi
- Sulfur dioxide0Good0.7 ppb14.3 mi
- Carbon monoxide-0.5 ppm10.2 mi
The days ahead
Highest 55, moderate, today, led by fine particles. Yesterday measured 46, good.
GoodModerate
- 46YesterdayOct 15
- 55TodayOct 16
- 55SatOct 17
- 50SunOct 18
- 44MonOct 19
- GoodTueOct 20
- GoodWedOct 21
Smoke, the next 45 hours
Little smoke near the ground through Sun 11 AM: the index from smoke stays at 6 or under.
Precipitation
What has fallen at San Francisco International Airport
None in the last 3 days, to Fri 2 PM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.00in
- Last 3 days
- 0.00in
Visibility
How far you can see at San Francisco International Airport, the next 45 hours
Visibility stays 10 miles or more through Sun 11 AM.
F
Now, today, and the week
Weather instrument stations by state
Airfield
- Code
- SFO
- ICAO
- KSFO
- IATA
- SFO
- Field elevation
- 13 ft
- Serves
- San Francisco
- Kind
- Large airport
- Scheduled service
- Yes
- Its own instrument
- SFO
- Wind now
- From 20° at 3 mph, read 16 Oct, 13:56
Runways
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 10L / 28R | 11,870 ft | 200 ft | Asphalt | 118° / 298° | 0 mph head, on 10L | 3 mph from the left |
| 10R / 28L | 11,381 ft | 200 ft | Asphalt | 118° / 298° | 0 mph head, on 10R | 3 mph from the left |
| 1L / 19R | 7,650 ft | 200 ft | Asphalt | 28° / 208° | 3 mph head, on 1L | None |
| 1R / 19L | 8,660 ft | 200 ft | Asphalt | 28° / 208° | 3 mph head, on 1R | None |
Measured here
What the airfield's own instrument measured, the last 24 hours
Every hour from San Francisco INTL (SFO), San Francisco International Airport's own instrument, measure by measure, on the field's own clock.
Humidity and dew point
A dew point of 45 F, the air 26% saturated; the humidity ran from 24% at 4 PM Thursday to 84% at 6 AM.
- Dew point now
- 45F
- 2 PM
- Humidity now
- 26%
- Humidity, range
- 24 to 84%
How it is measured: Humidity variables, Field Book FB-WAT-002
Wind
8 mph from the northwest at 2 PM; at its strongest 17 mph, 6 PM Thursday, and no gust reported.
- Now
- 8mph
- from the northwest
- Strongest
- 17mph
- 6 PM Thursday
- Highest gust
- -
- none reported
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
Pressure
30.03 inHg at 2 PM, falling 0.04 inHg over 3 hours; 0.01 inHg lower than a day before.
- Now
- 30.03inHg
- 2 PM
- 3 hours
- -0.04inHg
- falling
- 24 hours
- -0.01inHg
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Visibility
Down to 5 miles at 9 AM; 6 miles now.
- Now
- 6mi
- Lowest
- 5mi
- 9 AM
- Hours under a mile
- 0
How it is measured: Fog types, Field Book FB-WAT-020
Precipitation
None measured in the gauge in the last 24 hours.
- Last 24 hours
- 0.00in
- Wettest hour
- -
- Hours with some
- 0
How it is measured: ASOS, Field Book FB-INS-002
San Francisco INTL: every reading, the last 7 days, 30 days and the year, and how well it reports
What is measuring near here
The 4 instruments nearest San Francisco International Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.
measured now2 instruments
At an airfield/0.1 mi away/16 ft/3 ft above here
temp, wind, gust, visibility, precip, pressure
Spring Vly RAWSHSPC1
A remote fire weather station/5.2 mi away/1,030 ft/1,017 ft above here
temp, wind, gust, humidity, pressure
measured daily2 instruments
Millbrae 0.9 ENECA-SM-21
In a volunteer observer's own ground/1.3 mi away/5 ft/8 ft below here
precip, snowfall, snow depth
At a cooperative observer's station/10.3 mi away/67 ft/54 ft above here
snowfall, snow depth, precip, high, low
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in California
33 places, each with its own forecast and its own instruments.
Big Bear Mountainski areaBishopcityBridgeporttownChina Peakski areaDodge Ridgeski areaDonner PassfeatureFresnocityHeavenlysurveyed ski areaHomewoodski areaJune Mountainski areaKirkwoodsurveyed ski areaLos AngelescityMammoth LakestownMammoth Mountainsurveyed ski areaMount ShastafeatureMount Shasta CitycityMount Shasta Ski Parkski areaMount WhitneyfeatureMountain Highski areaNorthstarsurveyed ski areaPalisades Tahoesurveyed ski areaReddingcitySacramentocitySan DiegocitySan FranciscocitySierra NevadafeatureSierra-at-Tahoeski areaSnow Valleyski areaSouth Lake TahoecitySugar Bowlski areaSusanvillecityTruckeetownYosemitefeature
Near San Francisco International Airport
The nearest places, each with its own forecast and the instruments nearest it.
- Millbraecity, 2 mi
- Burlingamecity, 3 mi
- San Brunocity, 3 mi
- South San Franciscocity, 4 mi
- Hillsboroughtown, 4 mi
- Brisbanecity, 5 mi
- San Mateocity, 6 mi
- Pacificacity, 6 mi
- Colmatown, 7 mi
- Baywood Parkcommunity, 7 mi
- Highlandscommunity, 7 mi
- Daly Citycity, 7 mi
Airports near San Francisco International Airport
- San Carlos AirportSQL, 10 mi
- Half Moon Bay AirportHAF, 10 mi
- Oakland San Francisco Bay AirportOAK, 11 mi
- Hayward Executive AirportHWD, 14 mi
- Palo Alto AirportPAO, 18 mi
- Moffett Federal AirfieldNUQ, 23 mi
- Mineta San Jose International AirportSJC, 30 mi
- Livermore Municipal AirportLVK, 31 mi