Ontario International Airport (ONT) 15 Day Weather Forecast, Ontario United States
Current weather conditions and 15 day weather forecast for Ontario International 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 ONT
| 18 March 2026 Wed 21.7 ° C ( 71.1°F )  Clear |
Feels Like : 21.7 ° C / 71.1°F Humidity : % 39 Pressure : 1016 mb Wind Speed : 3.6 kmph / 2.2 miles from NNE 
Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15-day weather forecast for Ontario International Airport, Ontario, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 18 March 2026 Wed | Sunny |
20 ° C | 39.8 ° C | 27.2 ° C | % 33 | 15.5 km/h | 0% |
| 19 March 2026 Thu | Sunny |
20.2 ° C | 37.1 ° C | 26.8 ° C | % 34 | 14 km/h | 0% |
| 20 March 2026 Fri | Sunny |
21.4 ° C | 36.6 ° C | 27 ° C | % 33 | 16.9 km/h | 0% |
| 21 March 2026 Sat | Sunny |
20.4 ° C | 32.5 ° C | 25.8 ° C | % 28 | 16.2 km/h | 0% |
| 22 March 2026 Sun | Sunny |
18.3 ° C | 29.2 ° C | 22 ° C | % 43 | 16.6 km/h | 0% |
| 23 March 2026 Mon | Sunny |
17.6 ° C | 27.1 ° C | 21.7 ° C | % 46 | 16.6 km/h | 0% |
| 24 March 2026 Tue | Sunny |
17.2 ° C | 27 ° C | 21.2 ° C | % 48 | 18.4 km/h | 0% |
| 25 March 2026 Wed | Sunny |
15.6 ° C | 23.5 ° C | 18.6 ° C | % 50 | 16.9 km/h | 0% |
| 26 March 2026 Thu | Sunny |
12.9 ° C | 28 ° C | 20.5 ° C | % 18 | 10.4 km/h | 0% |
| 27 March 2026 Fri | Sunny |
17.1 ° C | 30.6 ° C | 23.4 ° C | % 11 | 13.3 km/h | 0% |
| 28 March 2026 Sat | Sunny |
17.7 ° C | 30 ° C | 23.5 ° C | % 19 | 14.4 km/h | 0% |
| 29 March 2026 Sun | Sunny |
17.9 ° C | 30.8 ° C | 24.2 ° C | % 28 | 14 km/h | 0% |
| 30 March 2026 Mon | Sunny |
19.1 ° C | 32.4 ° C | 25.3 ° C | % 28 | 13 km/h | 0% |
| 31 March 2026 Tue |  Cloudy |
19.6 ° C | 28.8 ° C | 23.5 ° C | % 39 | 18.4 km/h | 0% |
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