• Today

    Jul 26

    89°Lo 56°

    Patchy fog, then sun and warm

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      1%
    • Hi
      RealFeel
      93°
  • Wed

    Jul 27

    86°Lo 57°

    Clouds breaking for sun; warm

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      1%
    • Hi
      RealFeel
      91°
    more
  • Thu

    Jul 28

    85°Lo 59°

    Mostly sunny and very warm

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      1%
    • Hi
      RealFeel
      89°
    more
  • Fri

    Jul 29

    85°Lo 59°

    Remaining warm with sunshine

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      2%
    • Hi
      RealFeel
      89°
    more
  • Sat

    Jul 30

    82°Lo 59°

    Mostly sunny

    Excellent for lawn mowing
    • Hours of Precip
      0
    • Precip
      1%
    • Hi
      RealFeel
      86°
    more
Next Previous
Hi 89° RealFeel® 93° Precipitation 1%

Day

N

E

S

W

  • W 7 mph
  • Gusts: 13 mph

Patchy low clouds and fog early on, then mostly sunny and very warm

  • Max UV Index: 8 (Very High)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 56° RealFeel® 57° Precipitation 2%

Night

N

E

S

W

  • WSW 4 mph
  • Gusts: 9 mph

Mainly clear early on, then patchy low clouds and fog

  • Max UV Index: N/A
  • Thunderstorms: 12%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Jul 26

more Historical Weather Data >
  Today Normal Record 7/26/2015
High 89° 77° N/A 74°
Low 56° 57° N/A 60°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:08 AM with 14:13 of sunlight, then sets at 8:21 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:09 AM with 13:14 of moolight, then sets at 1:23 PM

Castro Valley Weather Report

90-degree heat to build across northwestern US this week

July 26, 2016; 7:48 AM ET

Dangerous heat will surge northward and send temperatures rising across the northwestern United States this week. more >

Current Drought Status

Current Soil Conditions

Tue. Overnight Freeze

Tue. Degree Days

Tue. Evapotranspiration