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
| 22 December 2025 Monday -4.6 ° C / 23.7°F  Clear |
Feels Like : -9.4 ° C / 15°F Humidity : % 66 Pressure : 1019 mb Wind Speed : 12.2 kmph / 7.6 miles from SW  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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 15 December 2025 Monday | Sunny |
-19.4 ° C (-2.9°F) |
0.8 ° C (33.4°F) |
-8.5 ° C (16.7°F) |
% 65 | 0% | 0.5 | Sunrise:07:15 AM Sunset: 04:37 PM |
Moonrise:03:16 AM Moonset: 01:35 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Partly Cloudy |
-6 ° C (21.2°F) |
3 ° C (37.4°F) |
-1.1 ° C (30°F) |
% 86 | 0% | 0.4 | Sunrise:07:16 AM Sunset: 04:38 PM |
Moonrise:04:18 AM Moonset: 02:02 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday |  Mist |
-1.3 ° C (29.7°F) |
-0.5 ° C (31.1°F) |
-0.4 ° C (31.2°F) |
% 97 | 0% | 0.3 | Sunrise:07:17 AM Sunset: 04:38 PM |
Moonrise:05:20 AM Moonset: 02:35 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday |  Patchy rain nearby |
-6.4 ° C (20.5°F) |
5 ° C (41°F) |
2 ° C (35.6°F) |
% 96 | 82% | 0.1 | Sunrise:07:17 AM Sunset: 04:38 PM |
Moonrise:06:21 AM Moonset: 03:16 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday | Sunny |
-8.6 ° C (16.5°F) |
-1.8 ° C (28.8°F) |
-5.3 ° C (22.5°F) |
% 51 | 0% | 0.3 | Sunrise:07:18 AM Sunset: 04:39 PM |
Moonrise:07:19 AM Moonset: 04:03 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Sunny |
-1.6 ° C (29.1°F) |
8.1 ° C (46.6°F) |
1.4 ° C (34.5°F) |
% 56 | 0% | 0 | Sunrise:07:18 AM Sunset: 04:39 PM |
Moonrise:08:10 AM Moonset: 04:59 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Partly Cloudy |
-3.5 ° C (25.6°F) |
3.8 ° C (38.9°F) |
-0 ° C (31.9°F) |
% 57 | 0% | 2 | Sunrise:07:19 AM Sunset: 04:40 PM |
Moonrise:08:54 AM Moonset: 06:01 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Patchy rain nearby |
0.8 ° C (33.4°F) |
2.3 ° C (36.2°F) |
1.5 ° C (34.8°F) |
% 79 | 76% | 1 | Sunrise:07:19 AM Sunset: 04:40 PM |
Moonrise:09:32 AM Moonset: 07:06 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Overcast |
2.7 ° C (36.9°F) |
17.7 ° C (63.8°F) |
10.1 ° C (50.3°F) |
% 89 | 0% | 3 | Sunrise:07:20 AM Sunset: 04:41 PM |
Moonrise:10:03 AM Moonset: 08:12 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Overcast |
4.7 ° C (40.4°F) |
10.1 ° C (50.3°F) |
9.4 ° C (48.9°F) |
% 84 | 0% | 2 | Sunrise:07:20 AM Sunset: 04:41 PM |
Moonrise:10:29 AM Moonset: 09:18 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Overcast |
3.1 ° C (37.6°F) |
14 ° C (57.2°F) |
7.8 ° C (46°F) |
% 85 | 0% | 2 | Sunrise:07:21 AM Sunset: 04:42 PM |
Moonrise:10:53 AM Moonset: 10:24 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Sunny |
1.5 ° C (34.7°F) |
6.6 ° C (43.8°F) |
5.1 ° C (41.3°F) |
% 62 | 0% | 3 | Sunrise:07:21 AM Sunset: 04:43 PM |
Moonrise:11:16 AM Moonset: 11:32 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Sunny |
-0.5 ° C (31.1°F) |
10.7 ° C (51.3°F) |
4.1 ° C (39.4°F) |
% 59 | 0% | 2 | Sunrise:07:21 AM Sunset: 04:43 PM |
Moonrise:11:39 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Sunny |
3.2 ° C (37.8°F) |
13.1 ° C (55.5°F) |
7.3 ° C (45.2°F) |
% 59 | 0% | 3 | Sunrise:07:22 AM Sunset: 04:44 PM |
Moonrise:12:03 PM Moonset: 12:40 AM Moon Phase ( Waxing Gibbous ) |
|
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