KSFO — SAN FRANCISCO
San Francisco, CA, US · America/Los_Angeles · 37.6190°, -122.3749° · 3m elevation
Daily METAR Observations
| Time | Temperature | Dew Point | Humidity | Wind | Wind Speed | Wind Gust | Pressure | Precip. | Condition |
|---|---|---|---|---|---|---|---|---|---|
| 12:56 AM | 60 °F 60.1 °F 16 °C 15.6 °C | 54 °F 54 °F 12 °C 12.2 °C | 80 % | WNW | 7 mph 6 kt 11 km/h | 0 mph 0 kt 0 km/h | 29.83 in | 0.0 in | Fair |
| METAR KSFO 120756Z 30006KT 10SM CLR 16/12 A2983 RMK AO2 SLP102 T01560122 403280150 | |||||||||
| 1:56 AM | 60 °F 60.1 °F 16 °C 15.6 °C | 57 °F 57 °F 14 °C 13.9 °C | 90 % | N | 5 mph 4 kt 7 km/h | 0 mph 0 kt 0 km/h | 29.83 in | 0.0 in | Fair |
| METAR KSFO 120856Z 35004KT 10SM CLR 16/14 A2983 RMK AO2 SLP101 T01560139 50001 | |||||||||
| 2:56 AM | 58 °F 57.9 °F 14 °C 14.4 °C | 54 °F 54 °F 12 °C 12.2 °C | 87 % | WNW | 6 mph 5 kt 9 km/h | 0 mph 0 kt 0 km/h | 29.82 in | 0.0 in | Fair |
| METAR KSFO 120956Z 29005KT 10SM CLR 14/12 A2982 RMK AO2 SLP099 T01440122 | |||||||||
| 3:56 AM | 58 °F 57.9 °F 14 °C 14.4 °C | 53 °F 53.1 °F 12 °C 11.7 °C | 84 % | WNW | 6 mph 5 kt 9 km/h | 0 mph 0 kt 0 km/h | 29.82 in | 0.0 in | Fair |
| METAR KSFO 121056Z 30005KT 10SM CLR 14/12 A2982 RMK AO2 SLP099 T01440117 | |||||||||
| 4:56 AM | 57 °F 57 °F 14 °C 13.9 °C | 53 °F 53.1 °F 12 °C 11.7 °C | 87 % | W | 6 mph 5 kt 9 km/h | 0 mph 0 kt 0 km/h | 29.83 in | 0.0 in | Fair |
| METAR KSFO 121156Z 28005KT 10SM FEW004 14/12 A2983 RMK AO2 SLP102 T01390117 10161 20139 53001 | |||||||||
| 5:56 AM | 57 °F 57 °F 14 °C 13.9 °C | 54 °F 54 °F 12 °C 12.2 °C | 89 % | WNW | 4 mph 3 kt 6 km/h | 0 mph 0 kt 0 km/h | 29.84 in | 0.0 in | Fair |
| METAR KSFO 121256Z 29003KT 10SM FEW004 14/12 A2984 RMK AO2 SLP104 T01390122 | |||||||||
| 6:56 AM | 60 °F 60.1 °F 16 °C 15.6 °C | 54 °F 54 °F 12 °C 12.2 °C | 80 % | N | 0 mph 0 kt 0 km/h | 0 mph 0 kt 0 km/h | 29.86 in | 0.0 in | Fair |
| METAR KSFO 121356Z 00000KT 10SM FEW004 16/12 A2986 RMK AO2 SLP110 T01560122 | |||||||||
| 7:56 AM | 62 °F 62.1 °F 17 °C 16.7 °C | 56 °F 55.9 °F 13 °C 13.3 °C | 80 % | N | 0 mph 0 kt 0 km/h | 0 mph 0 kt 0 km/h | 29.88 in | 0.0 in | Fair |
| METAR KSFO 121456Z 00000KT 10SM CLR 17/13 A2988 RMK AO2 SLP116 T01670133 53014 CHINO RWY L10 $ | |||||||||
| 8:56 AM | 65 °F 64.9 °F 18 °C 18.3 °C | 57 °F 57 °F 14 °C 13.9 °C | 76 % | NE | 5 mph 4 kt 7 km/h | 0 mph 0 kt 0 km/h | 29.88 in | 0.0 in | Fair |
| METAR KSFO 121556Z 04004KT 10SM CLR 18/14 A2988 RMK AO2 SLP118 T01830139 $ | |||||||||
| 9:56 AM | 66 °F 66 °F 19 °C 18.9 °C | 58 °F 57.9 °F 14 °C 14.4 °C | 75 % | ENE | 6 mph 5 kt 9 km/h | 0 mph 0 kt 0 km/h | 29.87 in | 0.0 in | Fair |
| METAR KSFO 121656Z 06005KT 10SM CLR 19/14 A2987 RMK AO2 SLP116 T01890144 $ | |||||||||
| 10:56 AM | 68 °F 68 °F 20 °C 20 °C | 59 °F 59 °F 15 °C 15 °C | 73 % | NE | 6 mph 5 kt 9 km/h | 0 mph 0 kt 0 km/h | 29.86 in | 0.0 in | Fair |
| METAR KSFO 121756Z 04005KT 10SM CLR 20/15 A2986 RMK AO2 SLP113 T02000150 10200 20139 58003 $ | |||||||||
| 11:56 AM | 71 °F 71.1 °F 22 °C 21.7 °C | 59 °F 59 °F 15 °C 15 °C | 66 % | N | 6 mph 5 kt 9 km/h | 0 mph 0 kt 0 km/h | 29.87 in | 0.0 in | Fair |
| METAR KSFO 121856Z 35005KT 10SM CLR 22/15 A2987 RMK AO2 SLP113 T02170150 $ | |||||||||
| 12:56 PM | 67 °F 66.9 °F 19 °C 19.4 °C | 54 °F 54 °F 12 °C 12.2 °C | 63 % | NW | 21 mph 18 kt 33 km/h | 0 mph 0 kt 0 km/h | 29.87 in | 0.0 in | Fair |
| METAR KSFO 121956Z 31018KT 10SM CLR 19/12 A2987 RMK AO2 SLP113 T01940122 $ | |||||||||
| 1:56 PM | 69 °F 69.1 °F 21 °C 20.6 °C | 54 °F 54 °F 12 °C 12.2 °C | 59 % | WNW | 22 mph 19 kt 35 km/h | 0 mph 0 kt 0 km/h | 29.85 in | 0.0 in | Fair |
| METAR KSFO 122056Z 30019KT 10SM CLR 21/12 A2985 RMK AO2 SLP108 T02060122 58004 $ | |||||||||
| 2:56 PM | 67 °F 66.9 °F 19 °C 19.4 °C | 54 °F 54 °F 12 °C 12.2 °C | 63 % | WNW | 23 mph 20 kt 37 km/h | 32 mph 28 kt 52 km/h | 29.84 in | 0.0 in | Fair |
| METAR KSFO 122156Z 30020G28KT 10SM FEW004 19/12 A2984 RMK AO2 PK WND 30028/2137 SLP106 T01940122 $ | |||||||||
| 3:56 PM | 66 °F 66 °F 19 °C 18.9 °C | 54 °F 54 °F 12 °C 12.2 °C | 65 % | WNW | 25 mph 22 kt 41 km/h | 0 mph 0 kt 0 km/h | 29.84 in | 0.0 in | Fair |
| METAR KSFO 122256Z 30022KT 10SM FEW003 19/12 A2984 RMK AO2 PK WND 31027/2256 SLP104 T01890122 $ | |||||||||
| 4:56 PM | 65 °F 64.9 °F 18 °C 18.3 °C | 55 °F 55 °F 13 °C 12.8 °C | 70 % | WNW | 25 mph 22 kt 41 km/h | 35 mph 30 kt 56 km/h | 29.83 in | 0.0 in | Fair |
| METAR KSFO 122356Z 30022G30KT 10SM FEW003 18/13 A2983 RMK AO2 PK WND 30030/2352 SLP100 T01830128 10233 20183 58009 $ | |||||||||
| 5:56 PM | 64 °F 64 °F 18 °C 17.8 °C | 55 °F 55 °F 13 °C 12.8 °C | 73 % | WNW | 22 mph 19 kt 35 km/h | 33 mph 29 kt 54 km/h | 29.82 in | 0.0 in | Fair |
| METAR KSFO 130056Z 30019G29KT 10SM FEW002 18/13 A2982 RMK AO2 PK WND 30030/0015 SLP099 T01780128 $ | |||||||||
| 6:56 PM | 62 °F 62.1 °F 17 °C 16.7 °C | 55 °F 55 °F 13 °C 12.8 °C | 78 % | NW | 20 mph 17 kt 32 km/h | 0 mph 0 kt 0 km/h | 29.82 in | 0.0 in | Fair |
| METAR KSFO 130156Z 31017KT 10SM FEW002 17/13 A2982 RMK AO2 PK WND 30028/0116 SLP098 T01670128 $ | |||||||||
| 7:56 PM | 60 °F 60.1 °F 16 °C 15.6 °C | 55 °F 55 °F 13 °C 12.8 °C | 83 % | WNW | 20 mph 17 kt 32 km/h | 28 mph 24 kt 44 km/h | 29.83 in | 0.0 in | Fair |
| METAR KSFO 130256Z 30017G24KT 10SM FEW002 16/13 A2983 RMK AO2 SLP100 T01560128 53000 $ | |||||||||
| 8:56 PM | 58 °F 57.9 °F 14 °C 14.4 °C | 55 °F 55 °F 13 °C 12.8 °C | 90 % | WNW | 15 mph 13 kt 24 km/h | 0 mph 0 kt 0 km/h | 29.84 in | 0.0 in | Fair |
| METAR KSFO 130356Z 30013KT 10SM FEW002 14/13 A2984 RMK AO2 SLP103 T01440128 $ | |||||||||
| 9:56 PM | 58 °F 57.9 °F 14 °C 14.4 °C | 55 °F 55 °F 13 °C 12.8 °C | 90 % | NW | 13 mph 11 kt 20 km/h | 0 mph 0 kt 0 km/h | 29.86 in | 0.0 in | Fair |
| METAR KSFO 130456Z 31011KT 10SM FEW002 14/13 A2986 RMK AO2 SLP110 T01440128 $ | |||||||||
| 10:56 PM | 57 °F 57 °F 14 °C 13.9 °C | 55 °F 55 °F 13 °C 12.8 °C | 93 % | NW | 13 mph 11 kt 20 km/h | 0 mph 0 kt 0 km/h | 29.86 in | 0.0 in | Fair |
| METAR KSFO 130556Z 31011KT 10SM FEW002 14/13 A2986 RMK AO2 SLP113 T01390128 10183 20139 51013 $ | |||||||||
| 11:56 PM | 57 °F 57 °F 14 °C 13.9 °C | 55 °F 55 °F 13 °C 12.8 °C | 93 % | NW | 9 mph 8 kt 15 km/h | 0 mph 0 kt 0 km/h | 29.86 in | 0.0 in | Fair |
| METAR KSFO 130656Z 31008KT 10SM FEW002 14/13 A2986 RMK AO2 SLP113 T01390128 $ | |||||||||
Time Series
Summary
| Temperature (°F) Temperature (°C) | Actual | |
| High Temp | ||
| Low Temp | ||
| Day Average Temp | ||
| Precipitation (in) | Actual | |
| Precipitation | ||
| Dew Point (°F) Dew Point (°C) | Actual | |
| High | ||
| Low | ||
| Average | ||
| Humidity (%) | Actual | |
| Average Humidity | ||
| Wind (mph) Wind (kt) Wind (km/h) | Actual | |
| Max Wind Speed | ||
| Max Wind Gust | ||
| Visibility | ||
| Pressure (in) | Actual | |
| Average Pressure | ||
| Astronomy | Day Length | Rise / Set |
| Actual Time | 14h 47m | 5:45 AM / 8:32 PM |
| Civil Twilight | 5:16 AM / 9:02 PM | |
| Nautical Twilight | 4:37 AM / 9:41 PM | |
| Astronomical Twilight | 3:53 AM / 10:25 PM | |
| Moon: Waning Crescent | ||
Methodology
Day Boundaries & Time
A "day" is defined as midnight to midnight (00:00:00 through 23:59:59) in the station's local time, using the IANA timezone assigned to each station (e.g. America/Chicago, Europe/London). Daylight Saving Time transitions are respected automatically — when a station's local clocks spring forward or fall back, the UTC boundaries of the day shift accordingly. This means a "day" in the spring DST transition is 23 hours, and in the fall transition it is 25 hours. All observations are stored internally in UTC and converted to local time for display.
Temperature
The FAA reports temperature in degrees Celsius. Values are stored to one decimal place — if a source value has additional precision, it is rounded on storage. Fahrenheit values are computed as °F = °C × 9/5 + 32. All temperatures are displayed as whole numbers (rounded to the nearest integer) in both Celsius and Fahrenheit. High and low temperatures are the maximum and minimum observed values for the day. The day average is the arithmetic mean of all observed temperatures, rounded to the nearest whole number.
Dew Point & Relative Humidity
Dew point is stored and displayed using the same rounding method as temperature (whole numbers). Relative humidity is not reported directly in METARs — it is calculated from the temperature and dew point using the Magnus formula: RH = 100 × exp[(17.27 × Td)/(237.7 + Td) − (17.27 × T)/(237.7 + T)], where T is temperature and Td is dew point, both in °C. The result is rounded to the nearest whole percent and clamped between 0% and 100%.
Wind
Wind direction is reported in degrees true (0–360). The compass direction shown (N, NNE, NE, etc.) divides the compass into 16 sectors of 22.5° each. Variable winds (reported as "VRB" in the METAR) are displayed as "CALM". Wind speed is reported in knots (integer). Miles per hour is computed as mph = kt × 1.15078 and kilometers per hour as km/h = kt × 1.852, both displayed as whole numbers. Wind gust is shown only when the METAR includes a gust value.
Pressure
The altimeter setting is reported in inches of mercury (inHg) to two decimal places. This is the station pressure corrected to sea level and is the value displayed. When the METAR also includes sea level pressure in millibars, that value is used in daily summary calculations.
Precipitation
Precipitation accumulations (1-hour, 3-hour, 6-hour, and 24-hour) are included when reported by the station. A value of 0.0005 inches represents trace precipitation in the FAA convention. The daily total in the summary is the sum of all 1-hour accumulations that exceed trace. Not all stations report precipitation data.
Sky Condition & Weather
The "Condition" column is derived from two METAR fields. If a weather phenomena code is present (e.g. RA for rain, SN for snow, FG for fog, TSRA for thunderstorms), it takes priority and the intensity prefix (- for light, + for heavy) is included. When no active weather is reported, the condition is derived from the highest sky cover layer: CLR/SKC/FEW = Fair, SCT = Partly Cloudy, BKN = Mostly Cloudy, OVC = Overcast.