Johnston City Weather Forecast 15 Days, Weather in Johnston City Today
Current weather conditions and 15 day weather forecast for Johnston City, 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 Johnston City
| 18 December 2025 Thursday 12.1 ° C / 53.8°F  Overcast |
Feels Like : 9.1 ° C / 48.3°F Humidity : % 94 Pressure : 1005 mb Wind Speed : 34.6 kmph / 21.5 miles from S  Visibility : 16 km Precipitation (rainfall) : 0.01 mm Cloud (%) : 100 |
15 day weather forecast for Johnston City, IL, USA
Weather Forecast for next 15 Days for Johnston City 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 Johnston City, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 18 December 2025 Thursday |  Moderate rain |
4.5 ° C (40.1°F) |
13.2 ° C (55.8°F) |
10.4 ° C (50.7°F) |
% 81 | 89% | 0.1 | Sunrise:07:06 AM Sunset: 04:39 PM |
Moonrise:06:08 AM Moonset: 03:18 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Sunny |
-3.8 ° C (25.2°F) |
5.2 ° C (41.4°F) |
0.8 ° C (33.5°F) |
% 65 | 0% | 0.4 | Sunrise:07:07 AM Sunset: 04:40 PM |
Moonrise:07:05 AM Moonset: 04:06 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Sunny |
-0.2 ° C (31.6°F) |
13.1 ° C (55.6°F) |
5.1 ° C (41.2°F) |
% 70 | 0% | 0.4 | Sunrise:07:07 AM Sunset: 04:40 PM |
Moonrise:07:57 AM Moonset: 05:02 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Sunny |
0.1 ° C (32.1°F) |
8.3 ° C (46.9°F) |
3.9 ° C (39°F) |
% 61 | 0% | 0.4 | Sunrise:07:08 AM Sunset: 04:41 PM |
Moonrise:08:42 AM Moonset: 06:03 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Patchy rain nearby |
1.4 ° C (34.5°F) |
5.9 ° C (42.6°F) |
3.6 ° C (38.5°F) |
% 51 | 71% | 0 | Sunrise:07:09 AM Sunset: 04:41 PM |
Moonrise:09:21 AM Moonset: 07:07 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Overcast |
5.4 ° C (41.8°F) |
14.5 ° C (58°F) |
9.3 ° C (48.8°F) |
% 78 | 0% | 2 | Sunrise:07:09 AM Sunset: 04:42 PM |
Moonrise:09:53 AM Moonset: 08:11 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Overcast |
11.6 ° C (52.9°F) |
19.7 ° C (67.4°F) |
15.9 ° C (60.7°F) |
% 89 | 0% | 4 | Sunrise:07:09 AM Sunset: 04:42 PM |
Moonrise:10:21 AM Moonset: 09:16 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Partly Cloudy |
11.4 ° C (52.5°F) |
22.6 ° C (72.7°F) |
17.7 ° C (63.9°F) |
% 72 | 0% | 5 | Sunrise:07:10 AM Sunset: 04:43 PM |
Moonrise:10:46 AM Moonset: 10:20 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Sunny |
4.4 ° C (39.9°F) |
10.7 ° C (51.2°F) |
7.2 ° C (45°F) |
% 47 | 0% | 3 | Sunrise:07:10 AM Sunset: 04:44 PM |
Moonrise:11:11 AM Moonset: 11:26 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Partly Cloudy |
0.4 ° C (32.7°F) |
7.3 ° C (45.1°F) |
3.7 ° C (38.6°F) |
% 45 | 0% | 2 | Sunrise:07:10 AM Sunset: 04:44 PM |
Moonrise:11:35 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Overcast |
-4.2 ° C (24.4°F) |
1.2 ° C (34.1°F) |
0 ° C (32.1°F) |
% 52 | 0% | 1 | Sunrise:07:11 AM Sunset: 04:45 PM |
Moonrise:12:01 PM Moonset: 12:33 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Sunny |
-7.2 ° C (19°F) |
-1.3 ° C (29.6°F) |
-5 ° C (23°F) |
% 40 | 0% | 2 | Sunrise:07:11 AM Sunset: 04:46 PM |
Moonrise:12:30 PM Moonset: 01:45 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Sunny |
-7.7 ° C (18.1°F) |
1.6 ° C (34.9°F) |
-4.1 ° C (24.6°F) |
% 37 | 0% | 2 | Sunrise:07:11 AM Sunset: 04:47 PM |
Moonrise:01:06 PM Moonset: 02:59 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Sunny |
-6.3 ° C (20.6°F) |
3.3 ° C (37.9°F) |
-1.9 ° C (28.7°F) |
% 43 | 0% | 2 | Sunrise:07:11 AM Sunset: 04:47 PM |
Moonrise:01:51 PM Moonset: 04:17 AM Moon Phase ( Waxing Gibbous ) |
|
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