Utility Check

SDG&E Summer Bill Spike: Why Bills Increase

Last updated: January 2026

Summer bills in SDG&E territory can increase significantly, especially for customers in inland areas like El Cajon, Escondido, and the mountain communities. While coastal San Diego has mild summers, inland areas experience substantial heat.

San Diego Climate Zones

SDG&E serves diverse climate zones:

  • Coastal: Mild year-round, minimal AC needed
  • Inland Valleys: Hot summers (90-100°F+), significant AC usage
  • Mountains: Hot summers, cold winters
  • Desert (Borrego Springs): Extreme heat, high AC usage

Your location dramatically affects summer bill increases.

TOU Peak Pricing Impact

Summer peak rates are highest when you need AC most:

  • Peak hours (4-9 PM) coincide with afternoon heat
  • Peak rates can exceed $0.60 per kWh
  • Running AC during peak hours dramatically increases costs

Pre-cooling your home before 4 PM can help reduce peak usage.

Summer Bill Management Tips

  • Pre-cool your home before 4 PM when rates are lower
  • Set thermostat to 78°F or higher during peak hours
  • Use ceiling fans to feel cooler without lowering AC
  • Close blinds on south and west-facing windows
  • Consider solar panels - SDG&E's high rates make solar very attractive

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Frequently Asked Questions

How much higher are SDG&E summer bills?

Coastal areas may see minimal increases, while inland areas can see bills 50-100% higher in summer. Desert areas like Borrego Springs can see bills 2-3x higher.

What's the best thermostat setting to save money in summer?

SDG&E recommends 78°F when you're home and 85°F when away. Each degree below 78°F can increase cooling costs by 2-3%.

Should I get solar to avoid summer bill spikes?

Yes, SDG&E's high rates make solar particularly attractive. Solar can eliminate most or all of your summer bill spikes while providing year-round savings.