5-day weather forecast San Diego 21-08-2026
Weather forecast San Diego Friday, August 21 21.08.2026: light rain shower, temperature from 15 °C to 17 °C.
Precipitation probability 90%. Wind up to 16.81 m/s (gusts 23.92 m/s). Air humidity 68–94%, atmospheric pressure 754–764 mm Hg, UV index up to 4.
5 days at a glance — tap a day to open it
Sunrise 06:16
Sunset 19:27
Sunset 19:27
First Quarter69% illuminated
Moonrise 15:36 · Moonset 00:23
Moonrise 15:36 · Moonset 00:23
Chart
Table
Fri, Aug 21, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Patchy rain possible | 15 °C | 25% (0.08 mm/hr) | 100% | 68% | 764 mm Hg | N 349° 11.81 (13.31) m/s | 0 |
| 01:00 | Patchy rain possible | 15 °C | 27% (0.1 mm/hr) | 100% | 70% | 764 mm Hg | N 357° 10.5 (13.31) m/s | 0 |
| 02:00 |  Overcast | 15 °C | 18% | 100% | 70% | 764 mm Hg | N 7° 10.81 (12.81) m/s | 0 |
| 03:00 | Patchy rain possible | 15 °C | 35% (0.14 mm/hr) | 100% | 79% | 761 mm Hg | N 6° 13.11 (16.22) m/s | 0 |
| 04:00 |  Light rain shower | 15 °C | 56% (0.52 mm/hr) | 100% | 82% | 761 mm Hg | N 356° 13.31 (16.14) m/s | 0 |
| 05:00 | Patchy rain possible | 15 °C | 32% (0.1 mm/hr) | 100% | 78% | 762 mm Hg | N 7° 12.81 (14.92) m/s | 0 |
| 06:00 | Light rain shower | 15 °C | 64% (0.73 mm/hr) | 100% | 86% | 760 mm Hg | N 1° 13.61 (18.19) m/s | 0 |
| 07:00 |  Light rain shower | 16 °C | 73% (1.22 mm/hr) | 100% | 88% | 759 mm Hg | N 1° 14.19 (18.92) m/s | 4 |
| 08:00 | Light rain shower | 15 °C | 72% (1.17 mm/hr) | 100% | 86% | 761 mm Hg | N 2° 14.19 (17.81) m/s | 4 |
| 09:00 | Light rain shower | 16 °C | 80% (2.1 mm/hr) | 100% | 90% | 759 mm Hg | N 353° 15.61 (20.31) m/s | 4 |
| 10:00 | Light rain shower | 16 °C | 78% (1.58 mm/hr) | 100% | 91% | 759 mm Hg | N 352° 15.5 (20.22) m/s | 4 |
| 11:00 | Light rain shower | 15 °C | 80% (2.03 mm/hr) | 100% | 91% | 760 mm Hg | N 5° 15.31 (19.39) m/s | 4 |
| 12:00 | Light rain shower | 15 °C | 80% (2 mm/hr) | 100% | 91% | 759 mm Hg | N 8° 15.81 (19.89) m/s | 4 |
| 13:00 | Light rain shower | 16 °C | 80% (2 mm/hr) | 100% | 92% | 758 mm Hg | N 11° 16.31 (20.5) m/s | 4 |
| 14:00 | Light rain shower | 16 °C | 81% (1.96 mm/hr) | 100% | 92% | 757 mm Hg | NNE 14° 16.81 (21) m/s | 4 |
| 15:00 |  Moderate or heavy rain shower | 16 °C | 85% (3 mm/hr) | 100% | 93% | 756 mm Hg | SE 127° 16.61 (22) m/s | 4 |
| 16:00 | Light rain shower | 16 °C | 88% (4.1 mm/hr) | 100% | 93% | 755 mm Hg | WSW 239° 16.39 (23) m/s | 4 |
| 17:00 | Moderate or heavy rain shower | 16 °C | 90% (5.14 mm/hr) | 100% | 93% | 755 mm Hg | N 352° 16.19 (23.92) m/s | 4 |
| 18:00 | Moderate or heavy rain shower | 17 °C | 89% (4.5 mm/hr) | 100% | 93% | 755 mm Hg | NNW 348° 15.81 (23.31) m/s | 4 |
| 19:00 | Moderate or heavy rain shower | 17 °C | 88% (3.9 mm/hr) | 100% | 93% | 754 mm Hg | NNW 345° 15.39 (22.61) m/s | 4 |
| 20:00 |  Moderate or heavy rain shower | 17 °C | 87% (3.31 mm/hr) | 100% | 93% | 754 mm Hg | NNW 341° 15 (22) m/s | 0 |
| 21:00 | Light rain shower | 17 °C | 85% (2.8 mm/hr) | 100% | 93% | 754 mm Hg | NW 321° 12.69 (19.31) m/s | 0 |
| 22:00 | Moderate or heavy rain shower | 17 °C | 83% (2.3 mm/hr) | 100% | 93% | 755 mm Hg | WNW 302° 10.5 (16.5) m/s | 0 |
| 23:00 | Light rain shower | 17 °C | 80% (1.73 mm/hr) | 100% | 94% | 755 mm Hg | WNW 282° 8.19 (13.83) m/s | 0 |
Fri, Aug 21, 2026
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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.