Southwest Weather Forecast 15 Days, Weather in Southwest Today
Current weather conditions and 15 day weather forecast for Southwest, 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 Southwest
| 08 February 2026 Sunday -3.8 ° C / 25.2°F  Overcast |
Feels Like : -8.3 ° C / 17.1°F Humidity : % 63 Pressure : 1028 mb Wind Speed : 11.5 kmph / 7.2 miles from SE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
15 day weather forecast for Southwest, IL, USA
Weather Forecast for next 15 Days for Southwest 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 Southwest, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 08 February 2026 Sunday |  Cloudy |
-6.6 ° C (20.1°F) |
-1.6 ° C (29.1°F) |
-3.7 ° C (25.4°F) |
% 78 | 0% | 0.5 | Sunrise:06:50 AM Sunset: 05:21 PM |
Moonrise:No moonrise Moonset: 09:56 AM Moon Phase ( Waning Gibbous ) |
|
| 09 February 2026 Monday | Overcast |
-2.3 ° C (27.9°F) |
2.4 ° C (36.3°F) |
-0.3 ° C (31.4°F) |
% 89 | 0% | 0.6 | Sunrise:06:49 AM Sunset: 05:22 PM |
Moonrise:12:44 AM Moonset: 10:25 AM Moon Phase ( Last Quarter ) |
|
| 10 February 2026 Tuesday | Overcast |
-1.6 ° C (29.2°F) |
2.5 ° C (36.5°F) |
0.9 ° C (33.7°F) |
% 99 | 0% | 0.6 | Sunrise:06:48 AM Sunset: 05:24 PM |
Moonrise:01:47 AM Moonset: 11:01 AM Moon Phase ( Waning Crescent ) |
|
| 11 February 2026 Wednesday |  Partly Cloudy |
-1 ° C (30.2°F) |
7.5 ° C (45.5°F) |
2.5 ° C (36.6°F) |
% 67 | 0% | 0.6 | Sunrise:06:46 AM Sunset: 05:25 PM |
Moonrise:02:46 AM Moonset: 11:44 AM Moon Phase ( Waning Crescent ) |
|
| 12 February 2026 Thursday | Partly Cloudy |
-0.1 ° C (31.7°F) |
6.4 ° C (43.6°F) |
1.9 ° C (35.4°F) |
% 67 | 0% | 0 | Sunrise:06:45 AM Sunset: 05:26 PM |
Moonrise:03:42 AM Moonset: 12:33 PM Moon Phase ( Waning Crescent ) |
|
| 13 February 2026 Friday |  Sunny |
-1.5 ° C (29.4°F) |
8.6 ° C (47.4°F) |
2.7 ° C (36.9°F) |
% 63 | 0% | 2 | Sunrise:06:44 AM Sunset: 05:27 PM |
Moonrise:04:32 AM Moonset: 01:32 PM Moon Phase ( Waning Crescent ) |
|
| 14 February 2026 Saturday |  Moderate rain |
1.7 ° C (35.1°F) |
9.6 ° C (49.3°F) |
6 ° C (42.8°F) |
% 85 | 77% | 2 | Sunrise:06:43 AM Sunset: 05:28 PM |
Moonrise:05:15 AM Moonset: 02:34 PM Moon Phase ( Waning Crescent ) |
|
| 15 February 2026 Sunday |  Patchy rain nearby |
7.7 ° C (45.9°F) |
20 ° C (67.9°F) |
13.7 ° C (56.7°F) |
% 77 | 76% | 3 | Sunrise:06:42 AM Sunset: 05:29 PM |
Moonrise:05:52 AM Moonset: 03:41 PM Moon Phase ( Waning Crescent ) |
|
| 16 February 2026 Monday | Sunny |
5.3 ° C (41.6°F) |
12.2 ° C (53.9°F) |
8.6 ° C (47.5°F) |
% 63 | 0% | 3 | Sunrise:06:40 AM Sunset: 05:30 PM |
Moonrise:06:22 AM Moonset: 04:48 PM Moon Phase ( Waning Crescent ) |
|
| 17 February 2026 Tuesday | Patchy rain nearby |
7.1 ° C (44.8°F) |
18.6 ° C (65.5°F) |
13.1 ° C (55.6°F) |
% 75 | 88% | 3 | Sunrise:06:39 AM Sunset: 05:31 PM |
Moonrise:06:50 AM Moonset: 05:56 PM Moon Phase ( New Moon ) |
|
| 18 February 2026 Wednesday | Moderate rain |
12 ° C (53.6°F) |
19.5 ° C (67.1°F) |
16 ° C (60.8°F) |
% 87 | 84% | 4 | Sunrise:06:38 AM Sunset: 05:33 PM |
Moonrise:07:15 AM Moonset: 07:04 PM Moon Phase ( Waxing Crescent ) |
|
| 19 February 2026 Thursday | Moderate rain |
3.9 ° C (39°F) |
15.4 ° C (59.8°F) |
10.9 ° C (51.6°F) |
% 76 | 83% | 3 | Sunrise:06:37 AM Sunset: 05:34 PM |
Moonrise:07:38 AM Moonset: 08:12 PM Moon Phase ( Waxing Crescent ) |
|
| 20 February 2026 Friday | Patchy rain nearby |
-1.7 ° C (29°F) |
10.8 ° C (51.4°F) |
4 ° C (39.2°F) |
% 72 | 72% | 1 | Sunrise:06:35 AM Sunset: 05:35 PM |
Moonrise:08:02 AM Moonset: 09:22 PM Moon Phase ( Waxing Crescent ) |
|
| 21 February 2026 Saturday |  Heavy rain |
8.4 ° C (47.2°F) |
18.2 ° C (64.7°F) |
13.3 ° C (55.9°F) |
% 89 | 87% | 3 | Sunrise:06:34 AM Sunset: 05:36 PM |
Moonrise:08:28 AM Moonset: 10:34 PM Moon Phase ( Waxing Crescent ) |
|
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