5-day weather forecast San Francisco 21-03-2026
Weather forecast San Francisco Saturday 21 March 21.03.2026: overcast, temperature from 12 °C to 18 °C.
No precipitation expected. Wind up to 4.39 m/s (gusts 6.67 m/s). Air humidity 60–84%, atmospheric pressure 760–761 mm Hg, UV index up to 5.
Sunrise 07:19
Sunset 19:19
Sunset 19:19
Chart
Table
Type of temperature:
°C
°F| Temperature | Precipitation | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Clear | 14 °C | 0% | 14% | 78% | 761 mm Hg | WSW 257° 1.89 (3.64) m/s | 0 |
| 01:00 |  Overcast | 14 °C | 0% | 100% | 80% | 761 mm Hg | WSW 242° 1.39 (2.72) m/s | 0 |
| 02:00 | Overcast | 14 °C | 0% | 96% | 80% | 761 mm Hg | WSW 253° 1.31 (2.47) m/s | 0 |
| 03:00 | Clear | 14 °C | 0% | 17% | 81% | 761 mm Hg | WSW 255° 1.81 (3.36) m/s | 0 |
| 04:00 | Overcast | 14 °C | 0% | 96% | 84% | 760 mm Hg | W 267° 2 (3.75) m/s | 0 |
| 05:00 | Overcast | 14 °C | 0% | 99% | 83% | 760 mm Hg | W 273° 1.89 (3.39) m/s | 0 |
| 06:00 |  Cloudy | 14 °C | 0% | 64% | 84% | 761 mm Hg | W 270° 1.89 (3.33) m/s | 0 |
| 07:00 |  Partly cloudy | 14 °C | 0% | 33% | 84% | 761 mm Hg | W 261° 1.31 (2.33) m/s | 0 |
| 08:00 |  Overcast | 14 °C | 0% | 100% | 83% | 761 mm Hg | W 260° 1.11 (1.89) m/s | 3 |
| 09:00 |  Partly cloudy | 15 °C | 0% | 54% | 79% | 761 mm Hg | W 262° 1.19 (1.89) m/s | 4 |
| 10:00 | Overcast | 16 °C | 0% | 100% | 74% | 761 mm Hg | W 270° 1.61 (2.31) m/s | 4 |
| 11:00 |  Cloudy | 16 °C | 0% | 75% | 69% | 761 mm Hg | W 261° 1.39 (2.03) m/s | 4 |
| 12:00 | Overcast | 17 °C | 0% | 100% | 67% | 761 mm Hg | W 269° 2.61 (3.92) m/s | 4 |
| 13:00 | Partly cloudy | 17 °C | 0% | 38% | 65% | 761 mm Hg | W 271° 3.11 (4.61) m/s | 5 |
| 14:00 | Partly cloudy | 18 °C | 0% | 32% | 64% | 761 mm Hg | W 268° 4.31 (6.28) m/s | 5 |
| 15:00 | Partly cloudy | 18 °C | 0% | 36% | 62% | 760 mm Hg | W 272° 4.31 (6.58) m/s | 5 |
| 16:00 | Partly cloudy | 17 °C | 0% | 33% | 60% | 760 mm Hg | W 271° 4.31 (6.67) m/s | 5 |
| 17:00 | Partly cloudy | 17 °C | 0% | 33% | 61% | 760 mm Hg | W 268° 4.39 (6.64) m/s | 5 |
| 18:00 | Overcast | 16 °C | 0% | 99% | 63% | 760 mm Hg | W 274° 4.31 (6.47) m/s | 4 |
| 19:00 | Overcast | 15 °C | 0% | 97% | 67% | 760 mm Hg | W 273° 3.61 (5.58) m/s | 3 |
| 20:00 | Cloudy | 14 °C | 0% | 74% | 70% | 761 mm Hg | W 270° 2.89 (4.53) m/s | 0 |
| 21:00 | Clear | 13 °C | 0% | 15% | 72% | 761 mm Hg | W 275° 2.69 (4.19) m/s | 0 |
| 22:00 | Clear | 13 °C | 0% | 9% | 75% | 761 mm Hg | W 267° 2.61 (4.03) m/s | 0 |
| 23:00 | Clear | 12 °C | 0% | 0% | 76% | 761 mm Hg | WSW 246° 1.61 (2.44) m/s | 0 |
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.