Weather History for KSFO - May, 2019
| Actual | Average | Record | |
|---|---|---|---|
| Temperature | |||
| Mean Temperature | 59 °F | 61 °F | |
| Max Temperature | 66 °F | 69 °F | 92 °F (1984) |
| Min Temperature | 52 °F | 53 °F | 45 °F (1955) |
| Degree Days | |||
| Heating Degree Days | 6 | 5 | |
| Month to date heating degree days | 175 | 166 | |
| Since 1 July heating degree days | 2294 | 2534 | |
| 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 | 50 °F | ||
| Average Humidity | 75 | ||
| Maximum Humidity | 89 | ||
| Minimum Humidity | 60 | ||
| Precipitation | |||
| Precipitation | 0.00 in | 0.01 in | 0.41 in (1998) |
| Month to date precipitation | 2.00 | 0.44 | |
| Year to date precipitation | 18.43 | 12.94 | |
| Sea Level Pressure | |||
| Sea Level Pressure | 30.01 in | ||
| Wind | |||
| Wind Speed | 12 mph (West) | ||
| Max Wind Speed | 25 mph | ||
| Max Gust Speed | 30 mph | ||
| Visibility | 9 miles | ||
| Events | |||
| T = Trace of Precipitation, MM = Missing Value | Source: NWS Daily Summary |
Daily Weather History Graph
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Astronomy
| May. 28, 2019 | Rise | Set |
|---|---|---|
| Actual Time | 5:51 AM PDT | 8:22 PM PDT |
| Civil Twilight | 5:21 AM PDT | 8:52 PM PDT |
| Nautical Twilight | 4:43 AM PDT | 9:30 PM PDT |
| Astronomical Twilight | 4:01 AM PDT | 10:12 PM PDT |
| Moon | 2:57 AM PDT (5/28) | 2:45 PM PDT (5/28) |
| Length of Visible Light | 15h 31m | |
| Length of Day |
14h 31m
|
|
| Waning Crescent, 30% of the Moon is Illuminated | ||||
| May 28 Waning Crescent | Jun 3 New | Jun 9 First Quarter | Jun 17 Full | Jun 25 Last 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% | 30.08 in | 9.0 mi | West | 19.6 mph | - | N/A | Mostly Cloudy | |
| 1:56 AM | 53.1 °F | 48.0 °F | 83% | 30.06 in | 10.0 mi | West | 19.6 mph | - | N/A | Mostly Cloudy | |
| 2:56 AM | 54.0 °F | 48.0 °F | 80% | 30.06 in | 9.0 mi | West | 15.0 mph | - | N/A | Mostly Cloudy | |
| 3:56 AM | 53.1 °F | 48.9 °F | 86% | 30.05 in | 9.0 mi | WNW | 5.8 mph | - | N/A | Mostly Cloudy | |
| 4:56 AM | 52.0 °F | 48.9 °F | 89% | 30.04 in | 9.0 mi | West | 9.2 mph | - | N/A | Mostly Cloudy | |
| 5:03 AM | 54.0 °F | 48.9 °F | 83% | 30.04 in | 9.0 mi | West | 13.8 mph | - | N/A | Mostly Cloudy | |
| 5:56 AM | 54.0 °F | 48.9 °F | 83% | 30.04 in | 9.0 mi | WNW | 8.1 mph | - | N/A | Mostly Cloudy | |
| 6:56 AM | 55.0 °F | 48.9 °F | 80% | 30.04 in | 10.0 mi | Calm | Calm | - | N/A | Mostly Cloudy | |
| 7:56 AM | 55.0 °F | 48.9 °F | 80% | 30.04 in | 10.0 mi | SE | 3.5 mph | - | N/A | Overcast | |
| 8:56 AM | 55.9 °F | 50.0 °F | 80% | 30.04 in | 10.0 mi | SSE | 4.6 mph | - | N/A | Mostly Cloudy | |
| 9:56 AM | 59.0 °F | 51.1 °F | 75% | 30.04 in | 10.0 mi | ENE | 4.6 mph | - | N/A | Mostly Cloudy | |
| 10:48 AM | 63.0 °F | 52.0 °F | 67% | 30.03 in | 10.0 mi | WNW | 11.5 mph | - | N/A | Partly Cloudy | |
| 10:56 AM | 62.1 °F | 52.0 °F | 70% | 30.04 in | 10.0 mi | WNW | 12.7 mph | - | N/A | Partly Cloudy | |
| 11:56 AM | 61.0 °F | 52.0 °F | 72% | 30.02 in | 10.0 mi | NW | 15.0 mph | - | N/A | Partly Cloudy | |
| 12:56 PM | 64.9 °F | 51.1 °F | 61% | 30.02 in | 10.0 mi | West | 16.1 mph | - | N/A | Partly Cloudy | |
| 1:56 PM | 64.0 °F | 51.1 °F | 63% | 30.01 in | 10.0 mi | West | 15.0 mph | - | N/A | Partly Cloudy | |
| 2:56 PM | 63.0 °F | 50.0 °F | 63% | 30.00 in | 10.0 mi | West | 17.3 mph | - | N/A | Partly Cloudy | |
| 3:56 PM | 64.9 °F | 50.0 °F | 58% | 29.98 in | 10.0 mi | WNW | 18.4 mph | - | N/A | Partly Cloudy | |
| 4:56 PM | 62.1 °F | 50.0 °F | 65% | 29.97 in | 10.0 mi | West | 19.6 mph | - | N/A | Partly Cloudy | |
| 5:56 PM | 60.1 °F | 50.0 °F | 69% | 29.96 in | 10.0 mi | West | 17.3 mph | - | N/A | Scattered Clouds | |
| 6:56 PM | 57.9 °F | 48.9 °F | 72% | 29.95 in | 10.0 mi | West | 20.7 mph | - | N/A | Mostly Cloudy | |
| 7:56 PM | 55.0 °F | 48.9 °F | 80% | 29.96 in | 9.0 mi | West | 13.8 mph | - | N/A | Mostly Cloudy | |
| 8:56 PM | 55.9 °F | 48.9 °F | 77% | 29.96 in | 8.0 mi | West | 9.2 mph | - | N/A | Mostly Cloudy | |
| 9:56 PM | 55.9 °F | 48.9 °F | 77% | 29.96 in | 8.0 mi | WSW | 11.5 mph | - | N/A | Mostly Cloudy | |
| 10:26 PM | 55.9 °F | 48.9 °F | 77% | 29.97 in | 6.0 mi | WSW | 12.7 mph | - | N/A | Haze | |
| 10:56 PM | 55.9 °F | 48.9 °F | 77% | 29.96 in | 6.0 mi | WSW | 8.1 mph | - | N/A | Haze | |
| 11:56 PM | 55.0 °F | 48.9 °F | 80% | 29.95 in | 6.0 mi | West | 5.8 mph | - | N/A | Haze |