Ontario Weather Forecast 15 Days, Weather in Ontario Today
Current weather conditions and 15 day weather forecast for Ontario, Illinois, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Ontario
| 11 August 2025 Monday 27.1 ° C / 80.8°F  Partly cloudy |
Feels Like : 31.5 ° C / 88.6°F Humidity : % 73 Pressure : 1019 mb Wind Speed : 9 kmph / 5.6 miles from SW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 75 |
15 day weather forecast for Ontario, IL, USA
Weather Forecast for next 15 Days for Ontario including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Ontario, Illinois state, US. To see the daily forecast, scroll to the table below.
| Date | |
|---|---|
| 11 August 2025 Monday | |
| Weather forecast |  Fog |
| Low temperature | 20.2 ° C (68.4°F) |
| High temperature | 27.6 ° C (81.7°F) |
| Avg. temperature | 23.4 ° C (74.2°F) |
| Humidity | % 90 |
| Chance of rain | 0% |
| UV Index | 1.6 |
| Sun Position | Sunrise:06:08 AM Sunset: 08:05 PM |
| Moon Position | Moonrise:09:25 PM Moonset: 08:37 AM Moon Phase ( Waning Gibbous ) |
| 12 August 2025 Tuesday | |
| Weather forecast |  Moderate rain |
| Low temperature | 21.5 ° C (70.7°F) |
| High temperature | 29.8 ° C (85.6°F) |
| Avg. temperature | 24.5 ° C (76°F) |
| Humidity | % 90 |
| Chance of rain | 88% |
| UV Index | 1.5 |
| Sun Position | Sunrise:06:09 AM Sunset: 08:03 PM |
| Moon Position | Moonrise:09:48 PM Moonset: 09:50 AM Moon Phase ( Waning Gibbous ) |
| 13 August 2025 Wednesday | |
| Weather forecast | Fog |
| Low temperature | 19.7 ° C (67.5°F) |
| High temperature | 28.6 ° C (83.5°F) |
| Avg. temperature | 24.2 ° C (75.5°F) |
| Humidity | % 86 |
| Chance of rain | 0% |
| UV Index | 2.2 |
| Sun Position | Sunrise:06:10 AM Sunset: 08:02 PM |
| Moon Position | Moonrise:10:12 PM Moonset: 11:04 AM Moon Phase ( Waning Gibbous ) |
| 14 August 2025 Thursday | |
| Weather forecast | Partly Cloudy |
| Low temperature | 19.7 ° C (67.5°F) |
| High temperature | 28.4 ° C (83.1°F) |
| Avg. temperature | 23.2 ° C (73.7°F) |
| Humidity | % 83 |
| Chance of rain | 0% |
| UV Index | 2.2 |
| Sun Position | Sunrise:06:11 AM Sunset: 08:01 PM |
| Moon Position | Moonrise:10:40 PM Moonset: 12:19 PM Moon Phase ( Waning Gibbous ) |
| 15 August 2025 Friday | |
| Weather forecast |  Sunny |
| Low temperature | 19.4 ° C (67°F) |
| High temperature | 31.6 ° C (88.8°F) |
| Avg. temperature | 25.3 ° C (77.6°F) |
| Humidity | % 81 |
| Chance of rain | 0% |
| UV Index | 0 |
| Sun Position | Sunrise:06:12 AM Sunset: 07:59 PM |
| Moon Position | Moonrise:11:14 PM Moonset: 01:36 PM Moon Phase ( Waning Gibbous ) |
| 16 August 2025 Saturday | |
| Weather forecast | Sunny |
| Low temperature | 22.3 ° C (72.2°F) |
| High temperature | 32.5 ° C (90.4°F) |
| Avg. temperature | 26.9 ° C (80.3°F) |
| Humidity | % 78 |
| Chance of rain | 0% |
| UV Index | 7 |
| Sun Position | Sunrise:06:13 AM Sunset: 07:58 PM |
| Moon Position | Moonrise:11:55 PM Moonset: 02:53 PM Moon Phase ( Last Quarter ) |
| 17 August 2025 Sunday | |
| Weather forecast | Sunny |
| Low temperature | 23.9 ° C (75°F) |
| High temperature | 28 ° C (82.4°F) |
| Avg. temperature | 25.9 ° C (78.6°F) |
| Humidity | % 82 |
| Chance of rain | 0% |
| UV Index | 7 |
| Sun Position | Sunrise:06:14 AM Sunset: 07:57 PM |
| Moon Position | Moonrise:No moonrise Moonset: 04:06 PM Moon Phase ( Waning Crescent ) |
| 18 August 2025 Monday | |
| Weather forecast |  Patchy rain nearby |
| Low temperature | 19.2 ° C (66.6°F) |
| High temperature | 32 ° C (89.7°F) |
| Avg. temperature | 25.5 ° C (77.9°F) |
| Humidity | % 81 |
| Chance of rain | 83% |
| UV Index | 6 |
| Sun Position | Sunrise:06:15 AM Sunset: 07:55 PM |
| Moon Position | Moonrise:12:47 AM Moonset: 05:11 PM Moon Phase ( Waning Crescent ) |
| 19 August 2025 Tuesday | |
| Weather forecast | Sunny |
| Low temperature | 23.3 ° C (73.9°F) |
| High temperature | 32.6 ° C (90.6°F) |
| Avg. temperature | 27.3 ° C (81.1°F) |
| Humidity | % 79 |
| Chance of rain | 0% |
| UV Index | 7 |
| Sun Position | Sunrise:06:16 AM Sunset: 07:54 PM |
| Moon Position | Moonrise:01:51 AM Moonset: 06:04 PM Moon Phase ( Waning Crescent ) |
| 20 August 2025 Wednesday | |
| Weather forecast | Patchy rain nearby |
| Low temperature | 20.4 ° C (68.7°F) |
| High temperature | 28.1 ° C (82.6°F) |
| Avg. temperature | 23.6 ° C (74.4°F) |
| Humidity | % 84 |
| Chance of rain | 74% |
| UV Index | 5 |
| Sun Position | Sunrise:06:16 AM Sunset: 07:52 PM |
| Moon Position | Moonrise:03:01 AM Moonset: 06:46 PM Moon Phase ( Waning Crescent ) |
| 21 August 2025 Thursday | |
| Weather forecast | Partly Cloudy |
| Low temperature | 14.7 ° C (58.5°F) |
| High temperature | 22 ° C (71.6°F) |
| Avg. temperature | 18.5 ° C (65.2°F) |
| Humidity | % 79 |
| Chance of rain | 0% |
| UV Index | 5 |
| Sun Position | Sunrise:06:17 AM Sunset: 07:51 PM |
| Moon Position | Moonrise:04:14 AM Moonset: 07:20 PM Moon Phase ( Waning Crescent ) |
| 22 August 2025 Friday | |
| Weather forecast | Sunny |
| Low temperature | 11.8 ° C (53.3°F) |
| High temperature | 24.3 ° C (75.7°F) |
| Avg. temperature | 17.8 ° C (64.1°F) |
| Humidity | % 71 |
| Chance of rain | 0% |
| UV Index | 5 |
| Sun Position | Sunrise:06:18 AM Sunset: 07:49 PM |
| Moon Position | Moonrise:05:27 AM Moonset: 07:46 PM Moon Phase ( Waning Crescent ) |
| 23 August 2025 Saturday | |
| Weather forecast | Patchy rain nearby |
| Low temperature | 15.9 ° C (60.7°F) |
| High temperature | 24.2 ° C (75.5°F) |
| Avg. temperature | 18.9 ° C (66.1°F) |
| Humidity | % 84 |
| Chance of rain | 73% |
| UV Index | 4 |
| Sun Position | Sunrise:06:19 AM Sunset: 07:48 PM |
| Moon Position | Moonrise:06:36 AM Moonset: 08:09 PM Moon Phase ( New Moon ) |
| 24 August 2025 Sunday | |
| Weather forecast | Sunny |
| Low temperature | 11.9 ° C (53.5°F) |
| High temperature | 23.4 ° C (74.1°F) |
| Avg. temperature | 17.3 ° C (63.2°F) |
| Humidity | % 76 |
| Chance of rain | 0% |
| UV Index | 5 |
| Sun Position | Sunrise:06:20 AM Sunset: 07:46 PM |
| Moon Position | Moonrise:07:43 AM Moonset: 08:29 PM Moon Phase ( Waxing Crescent ) |
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 11 August 2025 Monday | Fog |
20.2 ° C (68.4°F) |
27.6 ° C (81.7°F) |
23.4 ° C (74.2°F) |
% 90 | 0% | 1.6 | Sunrise:06:08 AM Sunset: 08:05 PM |
Moonrise:09:25 PM Moonset: 08:37 AM Moon Phase ( Waning Gibbous ) |
|
| 12 August 2025 Tuesday | Moderate rain |
21.5 ° C (70.7°F) |
29.8 ° C (85.6°F) |
24.5 ° C (76°F) |
% 90 | 88% | 1.5 | Sunrise:06:09 AM Sunset: 08:03 PM |
Moonrise:09:48 PM Moonset: 09:50 AM Moon Phase ( Waning Gibbous ) |
|
| 13 August 2025 Wednesday | Fog |
19.7 ° C (67.5°F) |
28.6 ° C (83.5°F) |
24.2 ° C (75.5°F) |
% 86 | 0% | 2.2 | Sunrise:06:10 AM Sunset: 08:02 PM |
Moonrise:10:12 PM Moonset: 11:04 AM Moon Phase ( Waning Gibbous ) |
|
| 14 August 2025 Thursday | Partly Cloudy |
19.7 ° C (67.5°F) |
28.4 ° C (83.1°F) |
23.2 ° C (73.7°F) |
% 83 | 0% | 2.2 | Sunrise:06:11 AM Sunset: 08:01 PM |
Moonrise:10:40 PM Moonset: 12:19 PM Moon Phase ( Waning Gibbous ) |
|
| 15 August 2025 Friday | Sunny |
19.4 ° C (67°F) |
31.6 ° C (88.8°F) |
25.3 ° C (77.6°F) |
% 81 | 0% | 0 | Sunrise:06:12 AM Sunset: 07:59 PM |
Moonrise:11:14 PM Moonset: 01:36 PM Moon Phase ( Waning Gibbous ) |
|
| 16 August 2025 Saturday | Sunny |
22.3 ° C (72.2°F) |
32.5 ° C (90.4°F) |
26.9 ° C (80.3°F) |
% 78 | 0% | 7 | Sunrise:06:13 AM Sunset: 07:58 PM |
Moonrise:11:55 PM Moonset: 02:53 PM Moon Phase ( Last Quarter ) |
|
| 17 August 2025 Sunday | Sunny |
23.9 ° C (75°F) |
28 ° C (82.4°F) |
25.9 ° C (78.6°F) |
% 82 | 0% | 7 | Sunrise:06:14 AM Sunset: 07:57 PM |
Moonrise:No moonrise Moonset: 04:06 PM Moon Phase ( Waning Crescent ) |
|
| 18 August 2025 Monday | Patchy rain nearby |
19.2 ° C (66.6°F) |
32 ° C (89.7°F) |
25.5 ° C (77.9°F) |
% 81 | 83% | 6 | Sunrise:06:15 AM Sunset: 07:55 PM |
Moonrise:12:47 AM Moonset: 05:11 PM Moon Phase ( Waning Crescent ) |
|
| 19 August 2025 Tuesday | Sunny |
23.3 ° C (73.9°F) |
32.6 ° C (90.6°F) |
27.3 ° C (81.1°F) |
% 79 | 0% | 7 | Sunrise:06:16 AM Sunset: 07:54 PM |
Moonrise:01:51 AM Moonset: 06:04 PM Moon Phase ( Waning Crescent ) |
|
| 20 August 2025 Wednesday | Patchy rain nearby |
20.4 ° C (68.7°F) |
28.1 ° C (82.6°F) |
23.6 ° C (74.4°F) |
% 84 | 74% | 5 | Sunrise:06:16 AM Sunset: 07:52 PM |
Moonrise:03:01 AM Moonset: 06:46 PM Moon Phase ( Waning Crescent ) |
|
| 21 August 2025 Thursday | Partly Cloudy |
14.7 ° C (58.5°F) |
22 ° C (71.6°F) |
18.5 ° C (65.2°F) |
% 79 | 0% | 5 | Sunrise:06:17 AM Sunset: 07:51 PM |
Moonrise:04:14 AM Moonset: 07:20 PM Moon Phase ( Waning Crescent ) |
|
| 22 August 2025 Friday | Sunny |
11.8 ° C (53.3°F) |
24.3 ° C (75.7°F) |
17.8 ° C (64.1°F) |
% 71 | 0% | 5 | Sunrise:06:18 AM Sunset: 07:49 PM |
Moonrise:05:27 AM Moonset: 07:46 PM Moon Phase ( Waning Crescent ) |
|
| 23 August 2025 Saturday | Patchy rain nearby |
15.9 ° C (60.7°F) |
24.2 ° C (75.5°F) |
18.9 ° C (66.1°F) |
% 84 | 73% | 4 | Sunrise:06:19 AM Sunset: 07:48 PM |
Moonrise:06:36 AM Moonset: 08:09 PM Moon Phase ( New Moon ) |
|
| 24 August 2025 Sunday | Sunny |
11.9 ° C (53.5°F) |
23.4 ° C (74.1°F) |
17.3 ° C (63.2°F) |
% 76 | 0% | 5 | Sunrise:06:20 AM Sunset: 07:46 PM |
Moonrise:07:43 AM Moonset: 08:29 PM Moon Phase ( Waxing Crescent ) |
|
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