San Diego County Weather Forecast
San Diego County weather: 76°F, clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
San Diego County is a county in California. San Diego County is a county in the United States. It has a population of about 3.3 million.
Right now it is 76°F (25°C) in San Diego County with clear. It feels like 82°F. Today runs from 69°F to 84°F. Chance of precipitation is 0%. Sightseeing conditions score 9.8/10 - excellent - go now.
The best time to visit San Diego County is April, May, June, July, August, September and October. The climate is Mediterranean. January, February and March tend to be the least comfortable months. August is the warmest month with average highs near 78°F, while January is the coldest with lows near 48°F.
The closest major airport is San Diego International Airport (SAN), about 2 mi away. Nearby highlights include Coronado Beach, Anza-Borrego Desert State Park, Disneyland Resort and Joshua Tree National Park.
In plain terms. Today is slightly warmer than average for August. The forecast high of 84°F is 6.1°F above the 78°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in San Diego County today at 9.8/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Active alerts for San Diego County
Extreme Heat Watch issued August 22 at 9:43PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA
Issued by NWS San Diego CA
Weather in San Diego County right now
Source: Open-Meteo. Updated 12:37 AM, Aug 23 local time.
See the San Diego County forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for San Diego County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Sat, Aug 22 | 🌥️ Fog | 84° / 69° | 0% | 8 mph | 7 |
| Sun, Aug 23 | 🌥️ Fog | 86° / 67° | 2% | 10 mph | 8 |
| Mon, Aug 24 | 🌥️ Fog | 85° / 67° | 1% | 8 mph | 8 |
| Tue, Aug 25 | ☀️ Clear sky | 86° / 76° | 1% | 9 mph | 8 |
| Wed, Aug 26 | ☀️ Clear sky | 79° / 73° | 1% | 13 mph | 8 |
| Thu, Aug 27 | 🌦️ Light drizzle | 79° / 72° | 1% · 0,0 in | 9 mph | 8 |
| Fri, Aug 28 | ☁️ Overcast | 83° / 75° | 3% | 8 mph | 8 |
| Sat, Aug 29 | ☁️ Overcast | 79° / 75° | 1% | 8 mph | 8 |
| Sun, Aug 30 | ☁️ Overcast | 82° / 74° | 1% | 8 mph | 8 |
| Mon, Aug 31 | ☁️ Overcast | 77° / 73° | 2% | 11 mph | 8 |
| Tue, Sep 1 | ☀️ Clear sky | 77° / 73° | 1% | 10 mph | 8 |
| Wed, Sep 2 | ☀️ Clear sky | 81° / 72° | 10% | 8 mph | 8 |
| Thu, Sep 3 | ☀️ Clear sky | 84° / 74° | 19% | 9 mph | 8 |
| Fri, Sep 4 | ☀️ Clear sky | 80° / 74° | 23% | 9 mph | 8 |
| Sat, Sep 5 | 🌤️ Mainly clear | 81° / 73° | 17% | 11 mph | 8 |
| Sun, Sep 6 | 🌤️ Mainly clear | 80° / 73° | 12% | 9 mph | 8 |
Climate in San Diego County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 65° | 48° | 2,4 in | ★★★★☆ |
| February | 65° | 50° | 3,1 in | ★★★★☆ |
| March | 67° | 52° | 2,7 in | ★★★★☆ |
| April | 67° | 54° | 0,5 in | ★★★★★ |
| May | 69° | 58° | 0,3 in | ★★★★★ |
| June | 72° | 61° | 0,1 in | ★★★★★ |
| July | 76° | 64° | 0,0 in | ★★★★★ |
| August | 78° | 65° | 0,6 in | ★★★★★ |
| September | 76° | 64° | 0,8 in | ★★★★★ |
| October | 75° | 58° | 0,8 in | ★★★★★ |
| November | 69° | 52° | 2,1 in | ★★★★☆ |
| December | 66° | 49° | 1,3 in | ★★★★☆ |
Climate type: Mediterranean. Source: Open-Meteo archive (ERA5).
Weather map for San Diego County
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in San Diego County
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit San Diego County
Go in April, May, June, July, August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and March - expect the least comfortable mix of heat, cold or rain.
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 76°F (25°C) with clear. Humidity is 74% and wind is 4 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 12:37 AM.
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 12:37 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
