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.

Sunrise 06:16
Sunset 19:27
First Quarter69% illuminated
Moonrise 15:36 · Moonset 00:23
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Table
Fri, Aug 21, 2026

Forecast from 15 °C to 17 °C and precipitation

Temperature & Precipitation
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Temperature (°C)151515151515151615161615151616161616171717171717
Precipitation (mm/hr)0.080.100.140.520.10.731.221.172.11.582.03221.9634.15.144.53.93.312.82.31.73

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Cloud cover (%)100100100100100100100100100100100100100100100100100100100100100100100100
Rain chance (%)252718355632647372807880808081858890898887858380

Wind speed and direction

Wind & Wind gust
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Wind (m/s)11.8110.510.8113.1113.3112.8113.6114.1914.1915.6115.515.3115.8116.3116.8116.6116.3916.1915.8115.391512.6910.58.19
Wind gust (m/s)13.3113.3112.8116.2216.1414.9218.1918.9217.8120.3120.2219.3919.8920.521222323.9223.3122.612219.3116.513.83
Wind direction (°)N 349°N 357°N 7°N 6°N 356°N 7°N 1°N 1°N 2°N 353°N 352°N 5°N 8°N 11°NNE 14°SE 127°WSW 239°N 352°NNW 348°NNW 345°NNW 341°NW 321°WNW 302°WNW 282°

Air humidity

Humidity
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidity (%)687070798278868886909191919292939393939393939394

Atmospheric pressure

Pressure
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pressure (mm Hg)764764764761761762760759761759759760759758757756755755755754754754755755

Ultraviolet index

UV Index
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
UV Index000000044444444444440000
Fri, Aug 21, 2026

San Diego 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.