San Diego County Weather Forecast
San Diego County weather: 74°F, partly cloudy. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
14-day forecast for San Diego County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Sun, Aug 23 | 🌥️ Fog | 90° / 70° | 1% | 9 mph | 8 |
| Mon, Aug 24 | 🌥️ Fog | 80° / 68° | 6% | 8 mph | 8 |
| Tue, Aug 25 | 🌦️ Light drizzle | 86° / 66° | 2% · 0,0 in | 8 mph | 8 |
| Wed, Aug 26 | ☁️ Overcast | 79° / 74° | 2% | 11 mph | 8 |
| Thu, Aug 27 | ☁️ Overcast | 79° / 73° | 2% | 10 mph | 8 |
| Fri, Aug 28 | ☁️ Overcast | 87° / 76° | 1% | 9 mph | 8 |
| Sat, Aug 29 | 🌤️ Mainly clear | 89° / 76° | 2% | 9 mph | 8 |
| Sun, Aug 30 | ☁️ Overcast | 77° / 73° | 1% | 14 mph | 8 |
| Mon, Aug 31 | ☁️ Overcast | 79° / 73° | 2% | 11 mph | 8 |
| Tue, Sep 1 | 🌤️ Mainly clear | 85° / 75° | 2% | 9 mph | 8 |
| Wed, Sep 2 | ☀️ Clear sky | 85° / 76° | 3% | 9 mph | 8 |
| Thu, Sep 3 | ☀️ Clear sky | 91° / 78° | 6% | 9 mph | 8 |
| Fri, Sep 4 | 🌦️ Light drizzle | 80° / 74° | 3% · 0,1 in | 11 mph | 8 |
| Sat, Sep 5 | 🌦️ Light drizzle | 90° / 76° | 3% · 0,1 in | 10 mph | 8 |
The two-week trend
Steady. The second week averages within a degree of the first, so no big change is signalled.
The window averages 84°F against a August normal of 78°F - 38°F above.
The next 7 days look unusually dry - roughly 9% of a normal August week (0,0 in against 0,1 in).
What this means for San Diego County
Today is warmer than average for August. The forecast high of 90°F is 12.1°F above the 78°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 47°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and March - historically the least comfortable months here.
See the San Diego County forecast by time range
San Diego County weather - more answers
Explore San Diego County
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is San Diego County?
San Diego County is a county in California. Its coordinates are 32.7157, -117.1611. It lies in North America.
What is the weather like in San Diego County right now?
It is currently 74°F (23°C) with partly cloudy. Humidity is 89% and wind is 2 mph.
When is the best time to visit San Diego County?
April, May, June, July, August, September and October offer the most comfortable conditions in San Diego County, which has a Mediterranean climate. January, February and March are usually the hardest months for outdoor plans.
What time zone is San Diego County in?
San Diego County observes America/Los_Angeles (UTC-07:00). The local time is 11:47 PM.
How many people live in San Diego County?
San Diego County has a population of approximately 3.3 million.
What is the nearest airport to San Diego County?
The closest airports are San Diego International Airport (SAN), 2 mi away, Los Angeles International Airport (LAX), 111 mi away and Harry Reid International Airport (LAS), 259 mi away.
What are the top things to do in San Diego County?
Popular options include Coronado Beach, Anza-Borrego Desert State Park, Disneyland Resort, Joshua Tree National Park, Santa Monica State Beach and Hollywood Sign.
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| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 23, 2026 at 11:47 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
