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      Extreme Heat Warning
      until 8:00 PM PDT
      +1 more alert
      Elev 75 ft, 33.657 °N 117.911 °W

      Costa Mesa, CA

      College Park Station84°
      Updated: 7:43 PM PDT on September 9, 2026 (GMT -7)
      3 minutes ago
      98°
      72°
      84
      Feels Like 88
      Fair
      N
      7
      Lower temperature is expected tomorrow
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Thu 09/10
        Low 75°f
         11% Precip. / 0 in
        Some clouds. Low around 75F. Winds SSE at 5 to 10 mph.
        Tomorrow
        Fri 09/11
        High 83°f
         5% Precip. / 0 in
        A few passing clouds, otherwise generally sunny. High 83F. Winds S at 5 to 10 mph.
        Tomorrow night
        Fri 09/11
        Low 73°f
         6% Precip. / 0 in
        A few clouds from time to time. Low 73F. Winds SSE at 5 to 10 mph.
        Hourly Forecast
        Now
        84°
        8PM
        84°
        9PM
        82°
        10PM
        81°
        11PM
        80°
        12AM
        79°
        1AM
        79°
        2AM
        78°
        3AM
        77°
        4AM
        77°
        5AM
        77°
        6AM
        77°
        6:32AM
        Sunrise
        7AM
        76°
        8AM
        78°
        9AM
        80°
        10AM
        81°
        11AM
        81°
        12PM
        82°
        1PM
        82°
        2PM
        83°
        3PM
        83°
        4PM
        82°
        5PM
        81°
        6PM
        79°
        7PM
        77°
        Precipitation
        11%
        Pollen
        Ragweed Pollen
        Moderate
        Air Quality
        47
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.87 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point62°F
        5. Humidity 48%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KSNA Station History
        Almanac for September 10, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 98°F 74°F 89°F 2015
        4. Low 72°F 65°F 51°F 1933
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.4 in -
        7. Snow 0 in 0 in -
        Almanac for September 11, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 83°F 74°F 92°F
        4. Low 72°F 65°F 51°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:31 AM 7:04 PM
        3. Civil Twilight 6:06 AM 7:29 PM
        4. Nautical Twilight 5:37 AM 7:59PM
        5. Astronomical Twilight 5:07 AM 8:29 PM
        1. Length of Visible Light 13h 23m
        2. Length of Day 12h 32m
        3. Tomorrow will be 2 minutes 3 seconds shorter
        1. Moon 6:00 AM 6:51 PM
        2. New0% of the Moon is Illuminated
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Precipitation
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