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Ontario, California weather · now

66°

Fog/Mist

High / Low
91° / 64°
Wind
0 mph N
Humidity
88%
No precipitation expected in the next 1.7 hours.
ModerateAir quality PollenTreeNoneGrassHighWeedLow
Sun 5:47 AM 8:04 PM 14h 17m
Moon Waning Crescent 19% lit

Current weather and 7-day forecast for Ontario, California, sourced directly from the National Weather Service. Expect sunny today. Today's high is 91° with a low near 64°. 1 active weather alert in effect.

What to wear today

Loose, light, and water nearby

91°F — wear breathable fabrics and stay hydrated.

Next 24 hours

55° 80° 100° ↑ 91° ↓ 64° 7 AM 10 AM 1 PM 4 PM 7 PM 10 PM 1 AM 4 AM

  1. 7 AM

    66°

    0%

  2. 9 AM

    74°

    0%

  3. 11 AM

    82°

    0%

  4. 1 PM

    88°

    0%

  5. 3 PM

    91°

    0%

  6. 5 PM

    89°

    0%

  7. 7 PM

    83°

    0%

  8. 9 PM

    75°

    0%

  9. 11 PM

    70°

    0%

  10. 1 AM

    67°

    0%

  11. 3 AM

    65°

    0%

  12. 5 AM

    64°

    0%

Live radar

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See what it actually looks like out there.

Feeds from public state DOT systems. Images may briefly stale, rotate, or go offline during maintenance.

7 days

  1. Today 7/10 Sunny 0% 91° · 64°
    1. 7 AM 66° Sunny
    2. 8 AM 69° Sunny
    3. 9 AM 74° Sunny
    4. 10 AM 78° Sunny
    5. 11 AM 82° Sunny
    6. 12 PM 87° Sunny
    7. 1 PM 88° Sunny
    8. 2 PM 90° Sunny
    9. 3 PM 91° Sunny
    10. 4 PM 90° Sunny
    11. 5 PM 89° Sunny
    12. 6 PM 87° Clear
    13. 7 PM 83° Clear
    14. 8 PM 79° Mostly Clear
    15. 9 PM 75° Mostly Clear
    16. 10 PM 72° Mostly Clear
    17. 11 PM 70° Mostly Clear
  2. Sat 7/11 Mostly Sunny 1% 91° · 64°
    1. 12 AM 69° Mostly Clear
    2. 1 AM 67° Mostly Clear
    3. 2 AM 66° Mostly Clear
    4. 3 AM 65° Mostly Clear
    5. 4 AM 65° Mostly Clear
    6. 5 AM 64° Partly Cloudy
    7. 6 AM 64° Mostly Sunny
    8. 7 AM 66° Mostly Sunny
    9. 8 AM 68° Mostly Sunny
    10. 9 AM 71° Mostly Sunny
    11. 10 AM 78° Mostly Sunny
    12. 11 AM 82° Partly Sunny
    13. 12 PM 86° Partly Sunny
    14. 1 PM 88° Partly Sunny
    15. 2 PM 89° Sunny
    16. 3 PM 90° Sunny
    17. 4 PM 89° Sunny
    18. 5 PM 87° Mostly Sunny
    19. 6 PM 86° Partly Cloudy
    20. 7 PM 82° Partly Cloudy
    21. 8 PM 78° Partly Cloudy
    22. 9 PM 75° Partly Cloudy
    23. 10 PM 73° Partly Cloudy
    24. 11 PM 71° Partly Cloudy 1%
  3. Sun 7/12 Mostly Sunny 7% 92° · 66°
    1. 12 AM 69° Partly Cloudy 1%
    2. 1 AM 68° Partly Cloudy 1%
    3. 2 AM 67° Partly Cloudy 1%
    4. 3 AM 66° Partly Cloudy 1%
    5. 4 AM 65° Partly Cloudy 1%
    6. 5 AM 65° Partly Cloudy 1%
    7. 6 AM 66° Mostly Sunny 1%
    8. 7 AM 67° Mostly Sunny 1%
    9. 8 AM 69° Mostly Sunny 1%
    10. 9 AM 72° Mostly Sunny 1%
    11. 10 AM 77° Mostly Sunny 1%
    12. 11 AM 80° Mostly Sunny 2%
    13. 12 PM 84° Mostly Sunny 2%
    14. 1 PM 87° Mostly Sunny 2%
    15. 2 PM 89° Mostly Sunny 2%
    16. 3 PM 90° Mostly Sunny 2%
    17. 4 PM 90° Mostly Sunny 2%
    18. 5 PM 90° Mostly Sunny 2%
    19. 6 PM 88° Partly Cloudy 2%
    20. 7 PM 84° Partly Cloudy 2%
    21. 8 PM 81° Partly Cloudy 2%
    22. 9 PM 78° Partly Cloudy 2%
    23. 10 PM 76° Partly Cloudy 2%
    24. 11 PM 74° Mostly Clear 2%
  4. Mon 7/13 Mostly Sunny 7% 93° · 67°
    1. 12 AM 72° Mostly Clear 2%
    2. 1 AM 70° Mostly Clear 2%
    3. 2 AM 69° Mostly Clear 2%
    4. 3 AM 68° Mostly Clear 2%
    5. 4 AM 68° Mostly Clear 2%
    6. 5 AM 68° Mostly Clear 7%
    7. 6 AM 68° Sunny 7%
    8. 7 AM 69° Sunny 7%
    9. 8 AM 71° Sunny 7%
    10. 9 AM 74° Sunny 7%
    11. 10 AM 78° Sunny 7%
    12. 11 AM 82° Mostly Sunny 6%
    13. 12 PM 86° Mostly Sunny 6%
    14. 1 PM 89° Mostly Sunny 6%
    15. 2 PM 91° Mostly Sunny 6%
    16. 3 PM 92° Mostly Sunny 6%
    17. 4 PM 92° Mostly Sunny 6%
    18. 5 PM 91° Sunny 2%
    19. 6 PM 88° Mostly Clear 2%
    20. 7 PM 85° Mostly Clear 2%
    21. 8 PM 82° Mostly Clear 2%
    22. 9 PM 79° Mostly Clear 2%
    23. 10 PM 76° Mostly Clear 2%
    24. 11 PM 74° Mostly Clear 1%
  5. Tue 7/14 Sunny 1% 97° · 70°
    1. 12 AM 72° Mostly Clear 1%
    2. 1 AM 70° Mostly Clear 1%
    3. 2 AM 69° Mostly Clear 1%
    4. 3 AM 68° Mostly Clear 1%
    5. 4 AM 68° Mostly Clear 1%
    6. 5 AM 69° Mostly Clear
    7. 6 AM 69° Sunny
    8. 7 AM 71° Sunny
    9. 8 AM 73° Sunny
    10. 9 AM 78° Sunny
    11. 10 AM 83° Sunny
    12. 11 AM 88° Sunny 1%
    13. 12 PM 92° Sunny 1%
    14. 1 PM 94° Sunny 1%
    15. 2 PM 96° Sunny 1%
    16. 3 PM 97° Sunny 1%
    17. 4 PM 96° Sunny 1%
    18. 5 PM 95° Sunny
    19. 6 PM 93° Mostly Clear
    20. 7 PM 90° Mostly Clear
    21. 8 PM 87° Mostly Clear
    22. 9 PM 84° Mostly Clear
    23. 10 PM 81° Mostly Clear
    24. 11 PM 78° Mostly Clear 1%
  6. Wed 7/15 Sunny 3% 102° · 72°
    1. 12 AM 76° Mostly Clear 1%
    2. 1 AM 74° Mostly Clear 1%
    3. 2 AM 73° Mostly Clear 1%
    4. 3 AM 72° Mostly Clear 1%
    5. 4 AM 72° Mostly Clear 1%
    6. 5 AM 72° Mostly Clear
    7. 6 AM 73° Sunny
    8. 7 AM 74° Sunny
    9. 8 AM 77° Sunny
    10. 9 AM 82° Sunny
    11. 10 AM 88° Sunny
    12. 11 AM 93° Sunny 2%
    13. 12 PM 97° Sunny 2%
    14. 1 PM 100° Sunny 2%
    15. 2 PM 101° Sunny 2%
    16. 3 PM 102° Sunny 2%
    17. 4 PM 101° Sunny 2%
    18. 5 PM 99° Sunny 3%
    19. 6 PM 96° Mostly Clear 3%
    20. 7 PM 93° Mostly Clear 3%
    21. 8 PM 89° Mostly Clear 3%
    22. 9 PM 86° Mostly Clear 3%
    23. 10 PM 83° Mostly Clear 3%
    24. 11 PM 80° Mostly Clear 3%
  7. Thu 7/16 Sunny 13% 98° · 69°
    1. 12 AM 78° Mostly Clear 3%
    2. 1 AM 75° Mostly Clear 3%
    3. 2 AM 74° Mostly Clear 3%
    4. 3 AM 73° Mostly Clear 3%
    5. 4 AM 73° Mostly Clear 3%
    6. 5 AM 73° Mostly Clear 1%
    7. 6 AM 73° Sunny 1%
    8. 7 AM 75° Sunny 1%
    9. 8 AM 77° Sunny 1%
    10. 9 AM 81° Sunny 1%
    11. 10 AM 86° Sunny 1%
    12. 11 AM 91° Sunny 12%
    13. 12 PM 94° Sunny 12%
    14. 1 PM 96° Sunny 12%
    15. 2 PM 97° Sunny 12%
    16. 3 PM 97° Sunny 12%
    17. 4 PM 96° Sunny 12%
    18. 5 PM 94° Sunny 13%
    19. 6 PM 91° Mostly Clear 13%
Extended outlook days 8–16
  1. Fri 7/17 Partly Cloudy 11% 95° · 76°
  2. Sat 7/18 Partly Cloudy 11% 98° · 76°
  3. Sun 7/19 Sunny 5% 96° · 77°
  4. Mon 7/20 Sunny 4% 96° · 76°
  5. Tue 7/21 Sunny 10% 100° · 78°
  6. Wed 7/22 Sunny 14% 100° · 83°
  7. Thu 7/23 Cloudy 14% 100° · 80°
  8. Fri 7/24 Cloudy 13% 94° · 80°
  9. Sat 7/25 Cloudy 5% 93° · 77°

Days 8+ from the Open-Meteo multi-model ensemble — treat as a guide; accuracy drops past day 7.

Best day this week

Mild temps, low rain chance, clearer skies.

Saturday, 7/11

Mostly Sunny, 91° / 64°

  1. Tomorrow91°64°
  2. Sun92°66°
  3. Mon93°67°
  4. Tue97°70°
  5. Wed102°72°
  6. Thu98°69°

Best time to head outside

Picks the upcoming daytime hour with the most favorable conditions for each activity. Factors in temperature, wind, precipitation timing, and pollen.

  • RunTomorrow 6 AM

    comfortable at 64°F · calm wind · no rain expected · pollen high today — allergy sufferers, take note

    Excellent100 / 100
  • Bike8 AM

    comfortable at 69°F · calm wind · no rain expected · pollen high today — allergy sufferers, take note

    Excellent100 / 100
  • Golf8 AM

    comfortable at 69°F · calm wind · no rain expected · pollen high today — allergy sufferers, take note

    Excellent100 / 100
  • Picnic8 AM

    comfortable at 69°F · calm wind · no rain expected · pollen high today — allergy sufferers, take note

    Excellent100 / 100
  • Magic ShowAnytime

    Any weather is magic show weather. Indoors or out, magic doesn't care.

    Corporate Magician Scott Henderson

How well did we do?

Average miss by lead time.

Each morning we save the day's predicted high/low. As later days arrive, we grade what we said against what the station actually recorded.

Same day
±4°
2 days graded
1 day out
±2°
3 days graded
3 days out
±2°
3 days graded
7 days out
±3°
4 days graded
Day-by-day, 1 day out3 days
  1. Yesterday±5°
    High95°90°+5°
    Low64°68°-4°
  2. Mon, Jul 6±1°
    High90°90°0°
    Low63°64°-1°
  3. Fri, Jul 3±1°
    High86°86°0°
    Low60°59°+1°

Climate normals

What weather to expect in Ontario

Ontario in July typically averages 92° highs and 63° lows, with about 0 days of rain. The hottest stretch is August (average high 95°); the coldest is January (average low 46°). April is the wettest month on average.

MonthAvg highAvg lowRainy days
Jan66°46°5
Feb68°49°6
Mar75°52°7
Apr75°53°10
May80°56°7
Jun87°59°1
Jul92°63°0
Aug95°66°0
Sep90°65°2
Oct83°59°4
Nov70°51°6
Dec69°49°3

Normals derived from the past two years of observations via Open-Meteo's historical archive.

More for Ontario

Other cities in California

Detailed forecast (NWS)

Today
Sunny, with a high near 91. South wind 0 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny, with a high near 91. Southwest wind 0 to 10 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 92. Southwest wind 0 to 10 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 93.

Forecast details

NWS gridpoint
SGX 49,76
Radar station
KSOX
Time zone
America/Los_Angeles
Coordinates
34.063, -117.651