Weather History for KSFO - May, 2019
| Actual | Average | Record | |
|---|---|---|---|
| Temperature | |||
| Mean Temperature | 59 °F | 59 °F | |
| Max Temperature | 64 °F | 67 °F | 96 °F (1976) |
| Min Temperature | 54 °F | 51 °F | 42 °F (1953) |
| Degree Days | |||
| Heating Degree Days | 6 | 6 | |
| Month to date heating degree days | 69 | 78 | |
| Since 1 July heating degree days | 2188 | 2446 | |
| Cooling Degree Days | 0 | 0 | |
| Month to date cooling degree days | 0 | 0 | |
| Year to date cooling degree days | 9 | 6 | |
| Growing Degree Days | 9 (Base 50) | ||
| Moisture | |||
| Dew Point | 48 °F | ||
| Average Humidity | 70 | ||
| Maximum Humidity | 83 | ||
| Minimum Humidity | 56 | ||
| Precipitation | |||
| Precipitation | 0.00 in | 0.02 in | 0.40 in (1998) |
| Month to date precipitation | T | 0.24 | |
| Year to date precipitation | 16.43 | 12.74 | |
| Sea Level Pressure | |||
| Sea Level Pressure | 29.99 in | ||
| Wind | |||
| Wind Speed | 14 mph (West) | ||
| Max Wind Speed | 24 mph | ||
| Max Gust Speed | 32 mph | ||
| Visibility | 10 miles | ||
| Events | |||
| T = Trace of Precipitation, MM = Missing Value | Source: NWS Daily Summary |
Daily Weather History Graph
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Astronomy
| May. 12, 2019 | Rise | Set |
|---|---|---|
| Actual Time | 6:02 AM PDT | 8:09 PM PDT |
| Civil Twilight | 5:33 AM PDT | 8:38 PM PDT |
| Nautical Twilight | 4:58 AM PDT | 9:14 PM PDT |
| Astronomical Twilight | 4:19 AM PDT | 9:52 PM PDT |
| Moon | 1:27 PM PDT (5/12) | 2:36 AM PDT (5/12) |
| Length of Visible Light | 15h 04m | |
| Length of Day |
14h 06m
|
|
| First Quarter, 59% of the Moon is Illuminated | ||||
| May 12 First Quarter | 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 | 54.0 °F | 48.0 °F | 80% | 29.99 in | 10.0 mi | West | 11.5 mph | - | N/A | Partly Cloudy | |
| 1:51 AM | 55.4 °F | 48.2 °F | 77% | 29.98 in | 10.0 mi | West | 8.1 mph | - | N/A | Overcast | |
| 1:56 AM | 55.0 °F | 48.0 °F | 77% | 29.98 in | 10.0 mi | West | 9.2 mph | - | N/A | Overcast | |
| 2:56 AM | 54.0 °F | 48.0 °F | 80% | 29.98 in | 10.0 mi | West | 10.4 mph | - | N/A | Overcast | |
| 3:56 AM | 55.0 °F | 48.0 °F | 77% | 29.97 in | 10.0 mi | West | 6.9 mph | - | N/A | Overcast | |
| 4:56 AM | 55.0 °F | 48.0 °F | 77% | 29.97 in | 10.0 mi | West | 8.1 mph | - | N/A | Overcast | |
| 5:30 AM | 55.0 °F | 48.0 °F | 77% | 29.97 in | 10.0 mi | West | 8.1 mph | - | N/A | Overcast | |
| 5:56 AM | 54.0 °F | 48.0 °F | 80% | 29.97 in | 10.0 mi | SSW | 4.6 mph | - | N/A | Mostly Cloudy | |
| 6:56 AM | 55.0 °F | 48.0 °F | 77% | 29.98 in | 10.0 mi | WSW | 8.1 mph | - | N/A | Mostly Cloudy | |
| 7:56 AM | 55.0 °F | 48.0 °F | 77% | 29.99 in | 10.0 mi | WSW | 4.6 mph | - | N/A | Mostly Cloudy | |
| 8:56 AM | 55.0 °F | 48.0 °F | 77% | 30.01 in | 10.0 mi | West | 10.4 mph | - | N/A | Overcast | |
| 9:56 AM | 55.9 °F | 48.9 °F | 77% | 30.01 in | 10.0 mi | West | 13.8 mph | - | N/A | Mostly Cloudy | |
| 10:41 AM | 57.9 °F | 48.9 °F | 72% | 30.01 in | 10.0 mi | West | 10.4 mph | - | N/A | Scattered Clouds | |
| 10:56 AM | 61.0 °F | 48.9 °F | 64% | 30.01 in | 10.0 mi | West | 13.8 mph | - | N/A | Scattered Clouds | |
| 11:56 AM | 61.0 °F | 48.9 °F | 64% | 30.01 in | 10.0 mi | West | 16.1 mph | - | N/A | Scattered Clouds | |
| 12:56 PM | 62.1 °F | 48.9 °F | 62% | 30.00 in | 10.0 mi | West | 19.6 mph | - | N/A | Scattered Clouds | |
| 1:56 PM | 63.0 °F | 48.9 °F | 60% | 30.00 in | 10.0 mi | WSW | 20.7 mph | - | N/A | Scattered Clouds | |
| 2:56 PM | 63.0 °F | 50.0 °F | 63% | 29.99 in | 10.0 mi | West | 17.3 mph | - | N/A | Partly Cloudy | |
| 3:56 PM | 64.0 °F | 48.9 °F | 58% | 29.98 in | 10.0 mi | West | 17.3 mph | - | N/A | Partly Cloudy | |
| 4:56 PM | 61.0 °F | 48.9 °F | 64% | 29.97 in | 10.0 mi | WSW | 17.3 mph | - | N/A | Partly Cloudy | |
| 5:56 PM | 59.0 °F | 48.9 °F | 69% | 29.96 in | 10.0 mi | West | 16.1 mph | - | N/A | Partly Cloudy | |
| 6:56 PM | 57.0 °F | 48.9 °F | 74% | 29.96 in | 10.0 mi | West | 19.6 mph | 28.8 mph | N/A | Scattered Clouds | |
| 7:20 PM | 55.9 °F | 48.9 °F | 77% | 29.97 in | 10.0 mi | West | 18.4 mph | 24.2 mph | N/A | Mostly Cloudy | |
| 7:56 PM | 55.9 °F | 48.0 °F | 75% | 29.97 in | 10.0 mi | West | 17.3 mph | - | N/A | Mostly Cloudy | |
| 8:56 PM | 55.9 °F | 48.9 °F | 77% | 29.99 in | 10.0 mi | West | 16.1 mph | - | N/A | Mostly Cloudy | |
| 9:56 PM | 55.0 °F | 48.0 °F | 77% | 30.01 in | 10.0 mi | West | 16.1 mph | - | N/A | Mostly Cloudy | |
| 10:56 PM | 55.0 °F | 48.0 °F | 77% | 30.02 in | 10.0 mi | West | 18.4 mph | - | N/A | Mostly Cloudy | |
| 11:56 PM | 55.0 °F | 48.0 °F | 77% | 30.02 in | 10.0 mi | WSW | 15.0 mph | - | N/A | Mostly Cloudy |