Ontario Airport (ONO) 15 Day Weather Forecast, Ontario United States
Current weather conditions and 15 day weather forecast for Ontario Airport in Ontario, United States including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at ONO
| 13 September 2026 Sun 14.8 ° C ( 58.6°F )  Clear |
Feels Like : 12.6 ° C / 54.7°F Humidity : % 61 Pressure : 1013 mb Wind Speed : 8.3 kmph / 5.1 miles from SSW 
Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15-day weather forecast for Ontario Airport, Ontario, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 13 September 2026 Sun | Sunny |
11.5 ° C | 25.2 ° C | 16.7 ° C | % 36 | 31.7 km/h | 1% |
| 14 September 2026 Mon | Sunny |
9.2 ° C | 19.6 ° C | 15.3 ° C | % 46 | 15.5 km/h | 1% |
| 15 September 2026 Tue | Sunny |
11.4 ° C | 22.5 ° C | 17.6 ° C | % 32 | 12.2 km/h | 3% |
| 16 September 2026 Wed | Sunny |
11 ° C | 27.4 ° C | 19.2 ° C | % 36 | 15.8 km/h | 1% |
| 17 September 2026 Thu | Sunny |
13.3 ° C | 26.2 ° C | 20.6 ° C | % 30 | 14.4 km/h | 1% |
| 18 September 2026 Fri | Sunny |
15.8 ° C | 27.4 ° C | 22 ° C | % 31 | 5.4 km/h | 0% |
| 19 September 2026 Sat | Sunny |
18.3 ° C | 28.9 ° C | 23.4 ° C | % 24 | 7.6 km/h | 0% |
| 20 September 2026 Sun | Sunny |
19.2 ° C | 29.5 ° C | 24.3 ° C | % 20 | 12.2 km/h | 0% |
| 21 September 2026 Mon | Sunny |
17 ° C | 26.1 ° C | 21.8 ° C | % 29 | 26.3 km/h | 5% |
| 22 September 2026 Tue | Sunny |
13 ° C | 25.3 ° C | 20.2 ° C | % 34 | 12.6 km/h | 2% |
| 23 September 2026 Wed | Sunny |
15.8 ° C | 25.8 ° C | 21 ° C | % 29 | 24.1 km/h | 3% |
| 24 September 2026 Thu | Sunny |
8.5 ° C | 16.5 ° C | 13.7 ° C | % 35 | 25.2 km/h | 1% |
| 25 September 2026 Fri |  Overcast |
6.6 ° C | 16.9 ° C | 13.1 ° C | % 33 | 12.2 km/h | 6% |
| 26 September 2026 Sat | Overcast |
8.3 ° C | 16.3 ° C | 12.6 ° C | % 30 | 33.1 km/h | 7% |
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