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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2 Miles WNW Castro Valley CA

7 Day Forecast

Overnight

Patchy Fog

Patchy
Fog

Low: 57 °F

Thursday

Patchy Fog

Patchy
Fog

High: 78 °F

Thursday
Night

Patchy Fog

Patchy
Fog

Low: 57 °F

Friday

Patchy Fog

Patchy
Fog

High: 76 °F

Friday
Night

Mostly Clear

Mostly
Clear

Low: 57 °F

Saturday

Sunny

Sunny

High: 77 °F

Saturday
Night

Mostly Clear

Mostly
Clear

Low: 57 °F

Sunday

Sunny

Sunny

High: 76 °F

Sunday
Night

Mostly Clear

Mostly
Clear

Low: 57 °F

Detailed Forecast

  • Overnight Patchy fog. Otherwise, mostly cloudy, with a low around 57. West wind around 5 mph.
  • Thursday Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 78. Light west northwest wind becoming west 5 to 10 mph in the afternoon.
  • Thursday Night Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 57. West wind 5 to 10 mph.
  • Friday Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 76. West southwest wind 3 to 8 mph.
  • Friday Night Mostly clear, with a low around 57. West southwest wind 6 to 11 mph.
  • Saturday Sunny, with a high near 77.
  • Saturday Night Mostly clear, with a low around 57.
  • Sunday Sunny, with a high near 76.
  • Sunday Night Mostly clear, with a low around 57.
  • Monday Sunny, with a high near 78.
  • Monday Night Mostly clear, with a low around 57.
  • Tuesday Sunny, with a high near 80.
  • Tuesday Night Mostly clear, with a low around 57.
  • Wednesday Sunny, with a high near 81.