Cooler Weather And Fog Arrive: San Diego County's Updated Forecast Including Potential Rain

Henrik Larsen

4 min read

Post on May 30, 2025

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Cooler Temperatures Sweep Across San Diego County

Get ready for a noticeable drop in temperatures across San Diego County! This change marks a departure from the recent milder weather and signals the arrival of more typical autumnal conditions. This shift in the San Diego weather forecast means you'll need to adjust your wardrobe and outdoor plans.

Temperature Drop Details

The expected temperature decrease will be significant, particularly when compared to recent averages. We anticipate a drop of 10-15 degrees Fahrenheit in many areas. Here's a breakdown by region:

• Coastal San Diego: Expect daytime highs in the low 60s (°F) and overnight lows in the upper 50s (°F).
• Inland Valleys: Prepare for daytime highs in the mid-60s (°F) to low 70s (°F), with overnight lows dipping into the 40s (°F) in some areas.
• Mountain Regions: Temperatures will be considerably cooler, with daytime highs in the 50s (°F) and overnight lows potentially dropping into the 30s (°F).

This cooler weather pattern is predicted to last for approximately 5-7 days, offering a welcome change for those who prefer cooler temperatures but a reminder to check the San Diego weather report before stepping out. This is slightly below the average temperatures for this time of year in San Diego.

Dense Fog Advisory: Visibility Concerns

Along with cooler temperatures, a dense fog advisory is in effect for portions of San Diego County. Reduced visibility will impact travel and daily routines, necessitating caution and preparedness. Checking the updated San Diego weather forecast is crucial for planning.

Areas Most Affected

The densest fog is expected to impact the following areas:

• Coastal areas: Expect significant fog along the coast, particularly near the ocean and bays.
• Low-lying valleys: Fog will settle in low-lying areas, reducing visibility considerably.
• Interstate 5 corridor: Drivers should be extra cautious due to potential fog along this major thoroughfare.

Reduced visibility due to fog can significantly impact driving conditions and could cause delays or cancellations for flights at San Diego International Airport (SAN). Safe driving practices are paramount during foggy conditions:

• Reduce your speed.
• Increase your following distance.
• Use your low beams.
• Avoid sudden braking or lane changes.

Duration and Timing

The fog is expected to be most dense during the overnight and early morning hours, generally between midnight and 10:00 AM. It's anticipated to gradually dissipate as the day progresses, with some lingering fog possible in low-lying areas even into the afternoon. Keep an eye on the updated San Diego weather forecast for precise timing changes.

Potential for Rain: Chance of Precipitation

While not a certainty, there's a chance of rainfall in some parts of San Diego County. Staying informed through regular checks of the San Diego weather forecast is advised.

Probability and Timing

The probability of rain varies across the county. Current predictions suggest:

• Coastal areas: A 20-30% chance of light showers.
• Inland valleys: A 10-20% chance of light showers.
• Mountain regions: A slightly higher chance of precipitation, potentially up to 40%.

Should any rain occur, it's most likely to fall in the afternoon or evening hours. Accumulations are expected to be minimal, likely less than a quarter of an inch.

Impact and Preparation

While the potential rainfall is not expected to be significant, it's wise to take some precautions:

• Secure any loose outdoor items that could be blown around by potential wind accompanying the rain.
• Bring in any sensitive plants or garden ornaments.
• Check the latest San Diego weather forecast before heading out for planned events. Some outdoor activities could potentially be affected.

Conclusion

This updated San Diego weather forecast indicates a significant change in weather conditions. Cooler temperatures, dense fog, and a slight chance of rain are expected. These changes will impact daily life for San Diego County residents, so it's crucial to remain informed and prepared.

Remember to stay updated on the latest San Diego weather forecast by checking reputable sources like the National Weather Service regularly. Be prepared for cooler temperatures, dense fog, and the potential for rain. Check the San Diego weather report before heading out to ensure a safe and informed day!