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
| 17 September 2026 Thu 16.5 ° C ( 61.7°F )  Sunny |
Feels Like : 14.3 ° C / 57.7°F Humidity : % 49 Pressure : 1012 mb Wind Speed : 6.5 kmph / 4 miles from W 
Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 10 |
15-day weather forecast for Ontario Airport, Ontario, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 17 September 2026 Thu | Sunny |
13.4 ° C | 25.1 ° C | 19.7 ° C | % 47 | 27.4 km/h | 57% |
| 18 September 2026 Fri | Sunny |
13.4 ° C | 23.7 ° C | 19.7 ° C | % 45 | 36 km/h | 4% |
| 19 September 2026 Sat | Sunny |
13 ° C | 25.5 ° C | 19.6 ° C | % 47 | 8.6 km/h | 1% |
| 20 September 2026 Sun | Sunny |
15.9 ° C | 27.5 ° C | 21 ° C | % 37 | 6.8 km/h | 3% |
| 21 September 2026 Mon | Sunny |
17.9 ° C | 27 ° C | 21.9 ° C | % 31 | 19.1 km/h | 3% |
| 22 September 2026 Tue | Sunny |
9.5 ° C | 20 ° C | 16.6 ° C | % 30 | 23 km/h | 3% |
| 23 September 2026 Wed | Sunny |
12.7 ° C | 23.5 ° C | 18.5 ° C | % 24 | 7.9 km/h | 1% |
| 24 September 2026 Thu | Sunny |
16.9 ° C | 28 ° C | 22.1 ° C | % 22 | 9 km/h | 1% |
| 25 September 2026 Fri |  Overcast |
19.5 ° C | 28.9 ° C | 23.8 ° C | % 23 | 16.2 km/h | 17% |
| 26 September 2026 Sat | Overcast |
18.6 ° C | 26.4 ° C | 22.4 ° C | % 40 | 21.6 km/h | 17% |
| 27 September 2026 Sun | Overcast |
12.7 ° C | 21 ° C | 17.9 ° C | % 44 | 13.3 km/h | 5% |
| 28 September 2026 Mon | Overcast |
7.8 ° C | 17.8 ° C | 14.5 ° C | % 28 | 16.2 km/h | 7% |
| 29 September 2026 Tue | Overcast |
9.4 ° C | 19.9 ° C | 15 ° C | % 30 | 13.7 km/h | 8% |
| 30 September 2026 Wed | Sunny |
12.2 ° C | 20.7 ° C | 16.6 ° C | % 30 | 11.2 km/h | 1% |
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