South Ottawa Weather Forecast 15 Days, Weather in South Ottawa Today
Current weather conditions and 15 day weather forecast for South Ottawa, 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 South Ottawa
| 17 August 2025 Sunday 31.2 ° C / 88.2°F  Sunny |
Feels Like : 37.6 ° C / 99.7°F Humidity : % 78 Pressure : 1016 mb Wind Speed : 5.4 kmph / 3.4 miles from SSW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for South Ottawa, IL, USA
Weather Forecast for next 15 Days for South Ottawa 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 South Ottawa, Illinois state, US. To see the daily forecast, scroll to the table below.
| Date | |
|---|---|
| 16 August 2025 Saturday | |
| Weather forecast | Sunny |
| Low temperature | 21.4 ° C (70.5°F) |
| High temperature | 36.6 ° C (97.9°F) |
| Avg. temperature | 28.5 ° C (83.4°F) |
| Humidity | % 80 |
| Chance of rain | 0% |
| UV Index | 1.9 |
| Sun Position | Sunrise:06:06 AM Sunset: 07:53 PM |
| Moon Position | Moonrise:11:48 PM Moonset: 02:48 PM Moon Phase ( Last Quarter ) |
| 17 August 2025 Sunday | |
| Weather forecast | Sunny |
| Low temperature | 21 ° C (69.8°F) |
| High temperature | 33.2 ° C (91.8°F) |
| Avg. temperature | 26.8 ° C (80.3°F) |
| Humidity | % 84 |
| Chance of rain | 0% |
| UV Index | 2.2 |
| Sun Position | Sunrise:06:07 AM Sunset: 07:51 PM |
| Moon Position | Moonrise:No moonrise Moonset: 04:02 PM Moon Phase ( Waning Crescent ) |
| 18 August 2025 Monday | |
| Weather forecast |  Heavy rain |
| Low temperature | 19.7 ° C (67.5°F) |
| High temperature | 32.6 ° C (90.7°F) |
| Avg. temperature | 25.2 ° C (77.3°F) |
| Humidity | % 86 |
| Chance of rain | 86% |
| UV Index | 2.2 |
| Sun Position | Sunrise:06:08 AM Sunset: 07:50 PM |
| Moon Position | Moonrise:12:39 AM Moonset: 05:07 PM Moon Phase ( Waning Crescent ) |
| 19 August 2025 Tuesday | |
| Weather forecast | Heavy rain |
| Low temperature | 20.6 ° C (69.1°F) |
| High temperature | 26.1 ° C (79°F) |
| Avg. temperature | 23.5 ° C (74.3°F) |
| Humidity | % 88 |
| Chance of rain | 87% |
| UV Index | 2.1 |
| Sun Position | Sunrise:06:09 AM Sunset: 07:48 PM |
| Moon Position | Moonrise:01:43 AM Moonset: 06:00 PM Moon Phase ( Waning Crescent ) |
| 20 August 2025 Wednesday | |
| Weather forecast |  Patchy rain nearby |
| Low temperature | 17.4 ° C (63.4°F) |
| High temperature | 25.1 ° C (77.2°F) |
| Avg. temperature | 21.1 ° C (70.1°F) |
| Humidity | % 87 |
| Chance of rain | 77% |
| UV Index | 0 |
| Sun Position | Sunrise:06:10 AM Sunset: 07:47 PM |
| Moon Position | Moonrise:02:53 AM Moonset: 06:41 PM Moon Phase ( Waning Crescent ) |
| 21 August 2025 Thursday | |
| Weather forecast | Patchy rain nearby |
| Low temperature | 18.9 ° C (66°F) |
| High temperature | 27.8 ° C (82°F) |
| Avg. temperature | 21.3 ° C (70.3°F) |
| Humidity | % 84 |
| Chance of rain | 84% |
| UV Index | 5 |
| Sun Position | Sunrise:06:11 AM Sunset: 07:45 PM |
| Moon Position | Moonrise:04:07 AM Moonset: 07:14 PM Moon Phase ( Waning Crescent ) |
| 22 August 2025 Friday | |
| Weather forecast | Sunny |
| Low temperature | 16.4 ° C (61.6°F) |
| High temperature | 29.5 ° C (85.1°F) |
| Avg. temperature | 22.5 ° C (72.5°F) |
| Humidity | % 73 |
| Chance of rain | 0% |
| UV Index | 6 |
| Sun Position | Sunrise:06:12 AM Sunset: 07:44 PM |
| Moon Position | Moonrise:05:20 AM Moonset: 07:41 PM Moon Phase ( Waning Crescent ) |
| 23 August 2025 Saturday | |
| Weather forecast |  Partly Cloudy |
| Low temperature | 16.2 ° C (61.1°F) |
| High temperature | 29.3 ° C (84.8°F) |
| Avg. temperature | 23 ° C (73.4°F) |
| Humidity | % 71 |
| Chance of rain | 0% |
| UV Index | 6 |
| Sun Position | Sunrise:06:13 AM Sunset: 07:42 PM |
| Moon Position | Moonrise:06:29 AM Moonset: 08:03 PM Moon Phase ( New Moon ) |
| 24 August 2025 Sunday | |
| Weather forecast | Partly Cloudy |
| Low temperature | 11.2 ° C (52.1°F) |
| High temperature | 20.6 ° C (69.1°F) |
| Avg. temperature | 15.8 ° C (60.5°F) |
| Humidity | % 75 |
| Chance of rain | 0% |
| UV Index | 5 |
| Sun Position | Sunrise:06:14 AM Sunset: 07:41 PM |
| Moon Position | Moonrise:07:36 AM Moonset: 08:23 PM Moon Phase ( Waxing Crescent ) |
| 25 August 2025 Monday | |
| Weather forecast | Partly Cloudy |
| Low temperature | 10.2 ° C (50.4°F) |
| High temperature | 22.7 ° C (72.8°F) |
| Avg. temperature | 15.7 ° C (60.3°F) |
| Humidity | % 66 |
| Chance of rain | 0% |
| UV Index | 5 |
| Sun Position | Sunrise:06:15 AM Sunset: 07:39 PM |
| Moon Position | Moonrise:08:40 AM Moonset: 08:42 PM Moon Phase ( Waxing Crescent ) |
| 26 August 2025 Tuesday | |
| Weather forecast | Partly Cloudy |
| Low temperature | 11 ° C (51.8°F) |
| High temperature | 25 ° C (77.1°F) |
| Avg. temperature | 17.1 ° C (62.8°F) |
| Humidity | % 65 |
| Chance of rain | 0% |
| UV Index | 5 |
| Sun Position | Sunrise:06:16 AM Sunset: 07:38 PM |
| Moon Position | Moonrise:09:43 AM Moonset: 09:02 PM Moon Phase ( Waxing Crescent ) |
| 27 August 2025 Wednesday | |
| Weather forecast | Sunny |
| Low temperature | 13.2 ° C (55.7°F) |
| High temperature | 28.6 ° C (83.6°F) |
| Avg. temperature | 20.3 ° C (68.5°F) |
| Humidity | % 61 |
| Chance of rain | 0% |
| UV Index | 6 |
| Sun Position | Sunrise:06:17 AM Sunset: 07:36 PM |
| Moon Position | Moonrise:10:46 AM Moonset: 09:22 PM Moon Phase ( Waxing Crescent ) |
| 28 August 2025 Thursday | |
| Weather forecast | Sunny |
| Low temperature | 16 ° C (60.8°F) |
| High temperature | 31.8 ° C (89.2°F) |
| Avg. temperature | 22.9 ° C (73.2°F) |
| Humidity | % 60 |
| Chance of rain | 0% |
| UV Index | 6 |
| Sun Position | Sunrise:06:18 AM Sunset: 07:35 PM |
| Moon Position | Moonrise:11:49 AM Moonset: 09:46 PM Moon Phase ( Waxing Crescent ) |
| 29 August 2025 Friday | |
| Weather forecast | Sunny |
| Low temperature | 20.7 ° C (69.2°F) |
| High temperature | 34.2 ° C (93.5°F) |
| Avg. temperature | 26.9 ° C (80.4°F) |
| Humidity | % 64 |
| Chance of rain | 0% |
| UV Index | 7 |
| Sun Position | Sunrise:06:19 AM Sunset: 07:33 PM |
| Moon Position | Moonrise:12:52 PM Moonset: 10:14 PM Moon Phase ( Waxing Crescent ) |
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 16 August 2025 Saturday | Sunny |
21.4 ° C (70.5°F) |
36.6 ° C (97.9°F) |
28.5 ° C (83.4°F) |
% 80 | 0% | 1.9 | Sunrise:06:06 AM Sunset: 07:53 PM |
Moonrise:11:48 PM Moonset: 02:48 PM Moon Phase ( Last Quarter ) |
|
| 17 August 2025 Sunday | Sunny |
21 ° C (69.8°F) |
33.2 ° C (91.8°F) |
26.8 ° C (80.3°F) |
% 84 | 0% | 2.2 | Sunrise:06:07 AM Sunset: 07:51 PM |
Moonrise:No moonrise Moonset: 04:02 PM Moon Phase ( Waning Crescent ) |
|
| 18 August 2025 Monday | Heavy rain |
19.7 ° C (67.5°F) |
32.6 ° C (90.7°F) |
25.2 ° C (77.3°F) |
% 86 | 86% | 2.2 | Sunrise:06:08 AM Sunset: 07:50 PM |
Moonrise:12:39 AM Moonset: 05:07 PM Moon Phase ( Waning Crescent ) |
|
| 19 August 2025 Tuesday | Heavy rain |
20.6 ° C (69.1°F) |
26.1 ° C (79°F) |
23.5 ° C (74.3°F) |
% 88 | 87% | 2.1 | Sunrise:06:09 AM Sunset: 07:48 PM |
Moonrise:01:43 AM Moonset: 06:00 PM Moon Phase ( Waning Crescent ) |
|
| 20 August 2025 Wednesday | Patchy rain nearby |
17.4 ° C (63.4°F) |
25.1 ° C (77.2°F) |
21.1 ° C (70.1°F) |
% 87 | 77% | 0 | Sunrise:06:10 AM Sunset: 07:47 PM |
Moonrise:02:53 AM Moonset: 06:41 PM Moon Phase ( Waning Crescent ) |
|
| 21 August 2025 Thursday | Patchy rain nearby |
18.9 ° C (66°F) |
27.8 ° C (82°F) |
21.3 ° C (70.3°F) |
% 84 | 84% | 5 | Sunrise:06:11 AM Sunset: 07:45 PM |
Moonrise:04:07 AM Moonset: 07:14 PM Moon Phase ( Waning Crescent ) |
|
| 22 August 2025 Friday | Sunny |
16.4 ° C (61.6°F) |
29.5 ° C (85.1°F) |
22.5 ° C (72.5°F) |
% 73 | 0% | 6 | Sunrise:06:12 AM Sunset: 07:44 PM |
Moonrise:05:20 AM Moonset: 07:41 PM Moon Phase ( Waning Crescent ) |
|
| 23 August 2025 Saturday | Partly Cloudy |
16.2 ° C (61.1°F) |
29.3 ° C (84.8°F) |
23 ° C (73.4°F) |
% 71 | 0% | 6 | Sunrise:06:13 AM Sunset: 07:42 PM |
Moonrise:06:29 AM Moonset: 08:03 PM Moon Phase ( New Moon ) |
|
| 24 August 2025 Sunday | Partly Cloudy |
11.2 ° C (52.1°F) |
20.6 ° C (69.1°F) |
15.8 ° C (60.5°F) |
% 75 | 0% | 5 | Sunrise:06:14 AM Sunset: 07:41 PM |
Moonrise:07:36 AM Moonset: 08:23 PM Moon Phase ( Waxing Crescent ) |
|
| 25 August 2025 Monday | Partly Cloudy |
10.2 ° C (50.4°F) |
22.7 ° C (72.8°F) |
15.7 ° C (60.3°F) |
% 66 | 0% | 5 | Sunrise:06:15 AM Sunset: 07:39 PM |
Moonrise:08:40 AM Moonset: 08:42 PM Moon Phase ( Waxing Crescent ) |
|
| 26 August 2025 Tuesday | Partly Cloudy |
11 ° C (51.8°F) |
25 ° C (77.1°F) |
17.1 ° C (62.8°F) |
% 65 | 0% | 5 | Sunrise:06:16 AM Sunset: 07:38 PM |
Moonrise:09:43 AM Moonset: 09:02 PM Moon Phase ( Waxing Crescent ) |
|
| 27 August 2025 Wednesday | Sunny |
13.2 ° C (55.7°F) |
28.6 ° C (83.6°F) |
20.3 ° C (68.5°F) |
% 61 | 0% | 6 | Sunrise:06:17 AM Sunset: 07:36 PM |
Moonrise:10:46 AM Moonset: 09:22 PM Moon Phase ( Waxing Crescent ) |
|
| 28 August 2025 Thursday | Sunny |
16 ° C (60.8°F) |
31.8 ° C (89.2°F) |
22.9 ° C (73.2°F) |
% 60 | 0% | 6 | Sunrise:06:18 AM Sunset: 07:35 PM |
Moonrise:11:49 AM Moonset: 09:46 PM Moon Phase ( Waxing Crescent ) |
|
| 29 August 2025 Friday | Sunny |
20.7 ° C (69.2°F) |
34.2 ° C (93.5°F) |
26.9 ° C (80.4°F) |
% 64 | 0% | 7 | Sunrise:06:19 AM Sunset: 07:33 PM |
Moonrise:12:52 PM Moonset: 10:14 PM Moon Phase ( Waxing Crescent ) |
|
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