South Jacksonville Weather Forecast 15 Days, Weather in South Jacksonville Today
Current weather conditions and 15 day weather forecast for South Jacksonville, 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 Jacksonville
| 13 May 2026 Wednesday 19.5 ° C / 67.1°F  Sunny |
Feels Like : 19.5 ° C / 67.1°F Humidity : % 42 Pressure : 1018 mb Wind Speed : 25.9 kmph / 16.1 miles from NNW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for South Jacksonville, IL, USA
Weather Forecast for next 15 Days for South Jacksonville 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 Jacksonville, Illinois state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 13 May 2026 Wednesday | Sunny |
13.1 ° C (55.6°F) |
23.2 ° C (73.8°F) |
18.5 ° C (65.2°F) |
% 37 | 0% | 7.7 | Sunrise:05:48 AM Sunset: 08:07 PM |
Moonrise:03:38 AM Moonset: 04:41 PM Moon Phase ( Waning Crescent ) |
|
| 14 May 2026 Thursday | Sunny |
7.8 ° C (46.1°F) |
19.8 ° C (67.7°F) |
14 ° C (57.2°F) |
% 63 | 0% | 8.3 | Sunrise:05:47 AM Sunset: 08:08 PM |
Moonrise:04:03 AM Moonset: 05:56 PM Moon Phase ( Waning Crescent ) |
|
| 15 May 2026 Friday |  Patchy rain nearby |
12.8 ° C (55°F) |
27.6 ° C (81.7°F) |
19.1 ° C (66.3°F) |
% 74 | 83% | 0.3 | Sunrise:05:46 AM Sunset: 08:09 PM |
Moonrise:04:32 AM Moonset: 07:15 PM Moon Phase ( Waning Crescent ) |
|
| 16 May 2026 Saturday |  Heavy rain |
17.3 ° C (63.2°F) |
25.3 ° C (77.5°F) |
20.1 ° C (68.1°F) |
% 87 | 85% | 5 | Sunrise:05:46 AM Sunset: 08:10 PM |
Moonrise:05:09 AM Moonset: 08:36 PM Moon Phase ( New Moon ) |
|
| 17 May 2026 Sunday | Patchy rain nearby |
17 ° C (62.5°F) |
28.9 ° C (84.1°F) |
22.4 ° C (72.3°F) |
% 77 | 89% | 5 | Sunrise:05:45 AM Sunset: 08:11 PM |
Moonrise:05:55 AM Moonset: 09:54 PM Moon Phase ( Waxing Crescent ) |
|
| 18 May 2026 Monday | Patchy rain nearby |
18.3 ° C (64.9°F) |
29.9 ° C (85.8°F) |
23.9 ° C (75.1°F) |
% 75 | 74% | 5 | Sunrise:05:44 AM Sunset: 08:11 PM |
Moonrise:06:53 AM Moonset: 11:03 PM Moon Phase ( Waxing Crescent ) |
|
| 19 May 2026 Tuesday |  Partly Cloudy |
12.1 ° C (53.9°F) |
18.4 ° C (65.2°F) |
16.2 ° C (61.1°F) |
% 75 | 0% | 5 | Sunrise:05:43 AM Sunset: 08:12 PM |
Moonrise:08:02 AM Moonset: 12:00 AM Moon Phase ( Waxing Crescent ) |
|
| 20 May 2026 Wednesday |  Moderate rain |
11.5 ° C (52.7°F) |
15.2 ° C (59.4°F) |
14.3 ° C (57.8°F) |
% 83 | 84% | 3 | Sunrise:05:42 AM Sunset: 08:13 PM |
Moonrise:09:17 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 21 May 2026 Thursday | Sunny |
9.1 ° C (48.4°F) |
21.5 ° C (70.7°F) |
15.3 ° C (59.6°F) |
% 73 | 0% | 5 | Sunrise:05:42 AM Sunset: 08:14 PM |
Moonrise:10:34 AM Moonset: 12:43 AM Moon Phase ( Waxing Crescent ) |
|
| 22 May 2026 Friday | Sunny |
12.3 ° C (54.2°F) |
23.4 ° C (74.1°F) |
17.7 ° C (63.9°F) |
% 69 | 0% | 5 | Sunrise:05:41 AM Sunset: 08:15 PM |
Moonrise:11:47 AM Moonset: 01:18 AM Moon Phase ( Waxing Crescent ) |
|
| 23 May 2026 Saturday | Sunny |
15.4 ° C (59.6°F) |
28.4 ° C (83.1°F) |
21.5 ° C (70.6°F) |
% 71 | 0% | 6 | Sunrise:05:40 AM Sunset: 08:16 PM |
Moonrise:12:57 PM Moonset: 01:46 AM Moon Phase ( First Quarter ) |
|
| 24 May 2026 Sunday | Patchy rain nearby |
20.6 ° C (69°F) |
28.2 ° C (82.8°F) |
23.7 ° C (74.7°F) |
% 79 | 87% | 5 | Sunrise:05:39 AM Sunset: 08:17 PM |
Moonrise:02:02 PM Moonset: 02:09 AM Moon Phase ( Waxing Gibbous ) |
|
| 25 May 2026 Monday | Patchy rain nearby |
19.8 ° C (67.7°F) |
26.9 ° C (80.5°F) |
23.2 ° C (73.7°F) |
% 87 | 87% | 5 | Sunrise:05:39 AM Sunset: 08:17 PM |
Moonrise:03:06 PM Moonset: 02:31 AM Moon Phase ( Waxing Gibbous ) |
|
| 26 May 2026 Tuesday | Patchy rain nearby |
20.8 ° C (69.4°F) |
23.8 ° C (74.8°F) |
22 ° C (71.7°F) |
% 91 | 87% | 5 | Sunrise:05:38 AM Sunset: 08:18 PM |
Moonrise:04:08 PM Moonset: 02:52 AM Moon Phase ( Waxing Gibbous ) |
|
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