National Weather Service United States Department of Commerce

Oppressive heat and humidity building into the central and southeast U.S.

A heat wave is building into parts of the central and southeast U.S. this week. The combination of heat and humidity will lead to dangerous heat indices, especially in parts of the central Mississippi River Valley where an Excessive Heat Warning is in effect. Heat Advisories are in effect elsewhere across the region. Relief is not expected for several days.
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Current Conditions

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Fountain Valley CA

7 Day Forecast

For More Weather Information:

San Diego, CA Local Forecast Office

Tonight

Mostly Cloudy

Mostly
Cloudy

Low: 66 °F

Thursday

Mostly Sunny

Mostly
Sunny

High: 78 °F

Thursday
Night

Partly Cloudy

Partly
Cloudy

Low: 66 °F

Friday

Becoming Sunny

Becoming
Sunny

High: 81 °F

Friday
Night

Increasing Clouds

Increasing
Clouds

Low: 66 °F

Saturday

Mostly Sunny

Mostly
Sunny

High: 80 °F

Saturday
Night

Partly Cloudy

Partly
Cloudy

Low: 65 °F

Sunday

Mostly Sunny

Mostly
Sunny

High: 80 °F

Sunday
Night

Partly Cloudy

Partly
Cloudy

Low: 65 °F

Detailed Forecast

  • Tonight Mostly cloudy, with a low around 66. Southwest wind around 5 mph.
  • Thursday Mostly sunny, with a high near 78. Light southwest wind increasing to 5 to 10 mph in the afternoon.
  • Thursday Night Partly cloudy, with a low around 66. Southwest wind 5 to 10 mph becoming light in the evening.
  • Friday Partly sunny, then gradually becoming sunny, with a high near 81. Light southwest wind increasing to 5 to 10 mph in the afternoon.
  • Friday Night Increasing clouds, with a low around 66. Southwest wind 5 to 10 mph becoming light west in the evening.
  • Saturday Mostly sunny, with a high near 80.
  • Saturday Night Partly cloudy, with a low around 65.
  • Sunday Mostly sunny, with a high near 80.
  • Sunday Night Partly cloudy, with a low around 65.
  • Monday Mostly sunny, with a high near 80.
  • Monday Night Partly cloudy, with a low around 66.
  • Tuesday Mostly sunny, with a high near 81.
  • Tuesday Night Mostly clear, with a low around 67.
  • Wednesday Sunny, with a high near 82.