5-day weather forecast San Francisco 21-05-2026
Weather forecast San Francisco Thursday, May 21 21.05.2026: sunny, temperature from 12 °C to 20 °C.
No precipitation expected. Wind up to 5 m/s (gusts 8.44 m/s). Air humidity 52–85%, atmospheric pressure 758–759 mm Hg, UV index up to 6.
Sunrise 05:55
Sunset 20:18
Sunset 20:18
Waxing Crescent24% illuminated
Moonrise 10:54 · Moonset 00:50
Moonrise 10:54 · Moonset 00:50
Chart
Table
Thu, May 21, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Clear | 13 °C | 0% | 7% | 82% | 758 mm Hg | SW 227° 2.11 (3.58) m/s | 0 |
| 01:00 | Clear | 13 °C | 0% | 7% | 83% | 758 mm Hg | SW 231° 2.19 (3.78) m/s | 0 |
| 02:00 | Clear | 13 °C | 0% | 0% | 75% | 759 mm Hg | WSW 248° 1.61 (3.28) m/s | 0 |
| 03:00 | Clear | 12 °C | 0% | 0% | 85% | 758 mm Hg | SW 232° 2.31 (3.92) m/s | 0 |
| 04:00 | Clear | 13 °C | 0% | 0% | 85% | 758 mm Hg | SW 229° 1.89 (3.28) m/s | 0 |
| 05:00 | Clear | 12 °C | 0% | 0% | 76% | 759 mm Hg | WSW 245° 1.81 (3.69) m/s | 0 |
| 06:00 |  Sunny | 13 °C | 0% | 0% | 84% | 758 mm Hg | SW 223° 1.31 (2.31) m/s | 4 |
| 07:00 | Sunny | 14 °C | 0% | 0% | 79% | 758 mm Hg | SSW 210° 1.31 (2.14) m/s | 4 |
| 08:00 | Sunny | 15 °C | 0% | 0% | 65% | 759 mm Hg | NW 318° 0.39 (0.69) m/s | 5 |
| 09:00 | Sunny | 16 °C | 0% | 0% | 66% | 758 mm Hg | SW 220° 1.5 (2.03) m/s | 5 |
| 10:00 | Sunny | 18 °C | 0% | 0% | 62% | 758 mm Hg | SW 233° 2.19 (2.94) m/s | 5 |
| 11:00 | Sunny | 19 °C | 0% | 0% | 53% | 759 mm Hg | WSW 252° 2.31 (3.81) m/s | 5 |
| 12:00 | Sunny | 19 °C | 0% | 0% | 53% | 759 mm Hg | WSW 253° 3.19 (5.39) m/s | 5 |
| 13:00 | Sunny | 20 °C | 0% | 0% | 52% | 759 mm Hg | WSW 254° 4.11 (6.89) m/s | 5 |
| 14:00 | Sunny | 20 °C | 0% | 0% | 52% | 759 mm Hg | WSW 255° 5 (8.44) m/s | 6 |
| 15:00 | Sunny | 19 °C | 0% | 0% | 54% | 758 mm Hg | WSW 257° 5 (8.39) m/s | 5 |
| 16:00 | Sunny | 19 °C | 0% | 0% | 56% | 758 mm Hg | WSW 258° 4.89 (8.39) m/s | 5 |
| 17:00 | Sunny | 18 °C | 0% | 0% | 58% | 758 mm Hg | W 259° 4.89 (8.33) m/s | 5 |
| 18:00 | Sunny | 17 °C | 0% | 0% | 61% | 758 mm Hg | WSW 258° 4.31 (7.39) m/s | 5 |
| 19:00 | Sunny | 17 °C | 0% | 0% | 65% | 758 mm Hg | WSW 256° 3.69 (6.5) m/s | 5 |
| 20:00 | Sunny | 16 °C | 0% | 0% | 68% | 758 mm Hg | WSW 255° 3.11 (5.56) m/s | 5 |
| 21:00 | Clear | 16 °C | 0% | 0% | 70% | 758 mm Hg | WSW 249° 2.89 (5.31) m/s | 0 |
| 22:00 | Clear | 15 °C | 0% | 0% | 72% | 758 mm Hg | WSW 244° 2.69 (5) m/s | 0 |
| 23:00 | Clear | 15 °C | 0% | 0% | 74% | 758 mm Hg | WSW 238° 2.5 (4.72) m/s | 0 |
Thu, May 21, 2026
San Francisco on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.