Currently: 54 °F. Passing clouds. (Weather station: San Francisco International Airport, USA). See more current weatherJanuary 2018 Weather in San Francisco — Graph
High & Low Weather Summary for January 2018
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 66 °F (Jan 28, 2:56 pm) | 97% (Jan 8, 4:56 pm) | 30.47 "Hg (Jan 8, 4:56 pm) |
| Low | 42 °F (Jan 27, 4:56 am) | 40% (Jan 28, 3:56 pm) | 29.54 "Hg (Jan 9, 2:56 am) |
| Average | 53 °F | 82% | 30.15 "Hg |
| * Reported Jan 1 12:56 am — Jan 31 11:56 pm, San Francisco. Weather by CustomWeather, © 2025 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
San Francisco Weather History for January 1, 2018
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 12:56 am Mon, Jan 1 |  | 52 °F | Passing clouds. | 5 mph | ↑ | 89% | 30.20 "Hg | 7 mi |
| 1:56 am | | 51 °F | Passing clouds. | No wind | ↑ | 86% | 30.20 "Hg | 7 mi |
| 2:56 am | | 48 °F | Passing clouds. | No wind | ↑ | 89% | 30.20 "Hg | 8 mi |
| 3:56 am | | 47 °F | Passing clouds. | 5 mph | ↑ | 90% | 30.20 "Hg | 9 mi |
| 4:56 am | | 47 °F | Passing clouds. | 3 mph | ↑ | 86% | 30.19 "Hg | 9 mi |
| 5:56 am | | 46 °F | Passing clouds. | No wind | ↑ | 93% | 30.21 "Hg | 9 mi |
| 6:56 am | | 45 °F | Fog. | 3 mph | ↑ | 93% | 30.22 "Hg | 6 mi |
| 8:02 am |  | 47 °F | Fog. | No wind | ↑ | 93% | 30.23 "Hg | 6 mi |
| 8:56 am | | 51 °F | Fog. | No wind | ↑ | 92% | 30.24 "Hg | 5 mi |
| 9:56 am |  | 53 °F | Broken clouds. | No wind | ↑ | 83% | 30.25 "Hg | 4 mi |
| 10:56 am | | 53 °F | Partly sunny. | 5 mph | ↑ | 83% | 30.24 "Hg | 4 mi |
| 11:56 am | | 54 °F | Partly sunny. | 3 mph | ↑ | 80% | 30.22 "Hg | 4 mi |
| 12:56 pm | | 55 °F | Partly sunny. | 3 mph | ↑ | 80% | 30.18 "Hg | 4 mi |
| 1:56 pm | | 57 °F | Partly sunny. | 5 mph | ↑ | 78% | 30.16 "Hg | 8 mi |
| 2:56 pm | | 57 °F | Partly sunny. | 5 mph | ↑ | 74% | 30.16 "Hg | 8 mi |
| 3:56 pm | | 57 °F | Partly sunny. | No wind | ↑ | 74% | 30.15 "Hg | 10 mi |
| 4:56 pm | | 55 °F | Partly sunny. | 3 mph | ↑ | 77% | 30.14 "Hg | 10 mi |
| 5:56 pm | | 56 °F | Passing clouds. | No wind | ↑ | 72% | 30.14 "Hg | 10 mi |
| 6:56 pm | | 57 °F | Passing clouds. | No wind | ↑ | 69% | 30.15 "Hg | 10 mi |
| 7:56 pm | | 57 °F | Passing clouds. | No wind | ↑ | 67% | 30.15 "Hg | 10 mi |
| 8:56 pm | | 52 °F | Passing clouds. | No wind | ↑ | 80% | 30.15 "Hg | 10 mi |
| 9:56 pm | | 53 °F | Passing clouds. | No wind | ↑ | 74% | 30.16 "Hg | 10 mi |
| 10:56 pm | | 53 °F | Passing clouds. | No wind | ↑ | 80% | 30.17 "Hg | 10 mi |
| 11:56 pm | | 53 °F | Passing clouds. | 3 mph | ↑ | 86% | 30.17 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||