St. Mary Weather Forecast 15 Days, Weather in St. Mary Today
Current weather conditions and 15 day weather forecast for St. Mary, 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 St. Mary
| 11 August 2025 Monday 26.2 ° C / 79.2°F  Partly cloudy |
Feels Like : 30.9 ° C / 87.7°F Humidity : % 84 Pressure : 1018 mb Wind Speed : 10.4 kmph / 6.5 miles from SW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 50 |
15 day weather forecast for St. Mary, IL, USA
Weather Forecast for next 15 Days for St. Mary 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 St. Mary, Illinois state, US. To see the daily forecast, scroll to the table below.
| Date | |
|---|---|
| 11 August 2025 Monday | |
| Weather forecast |  Moderate rain |
| Low temperature | 19.6 ° C (67.3°F) |
| High temperature | 27.6 ° C (81.7°F) |
| Avg. temperature | 23 ° C (73.4°F) |
| Humidity | % 93 |
| Chance of rain | 86% |
| UV Index | 1.4 |
| Sun Position | Sunrise:06:11 AM Sunset: 08:06 PM |
| Moon Position | Moonrise:09:28 PM Moonset: 08:40 AM Moon Phase ( Waning Gibbous ) |
| 12 August 2025 Tuesday | |
| Weather forecast | Moderate rain |
| Low temperature | 21.9 ° C (71.4°F) |
| High temperature | 29.7 ° C (85.5°F) |
| Avg. temperature | 24.8 ° C (76.6°F) |
| Humidity | % 90 |
| Chance of rain | 84% |
| UV Index | 2 |
| Sun Position | Sunrise:06:12 AM Sunset: 08:04 PM |
| Moon Position | Moonrise:09:51 PM Moonset: 09:53 AM Moon Phase ( Waning Gibbous ) |
| 13 August 2025 Wednesday | |
| Weather forecast | Moderate rain |
| Low temperature | 20.8 ° C (69.4°F) |
| High temperature | 28.7 ° C (83.7°F) |
| Avg. temperature | 24.8 ° C (76.6°F) |
| Humidity | % 86 |
| Chance of rain | 89% |
| UV Index | 2.2 |
| Sun Position | Sunrise:06:13 AM Sunset: 08:03 PM |
| Moon Position | Moonrise:10:16 PM Moonset: 11:06 AM Moon Phase ( Waning Gibbous ) |
| 14 August 2025 Thursday | |
| Weather forecast | Partly Cloudy |
| Low temperature | 19.2 ° C (66.6°F) |
| High temperature | 29.7 ° C (85.5°F) |
| Avg. temperature | 23.3 ° C (73.9°F) |
| Humidity | % 84 |
| Chance of rain | 0% |
| UV Index | 2.1 |
| Sun Position | Sunrise:06:14 AM Sunset: 08:02 PM |
| Moon Position | Moonrise:10:44 PM Moonset: 12:20 PM Moon Phase ( Waning Gibbous ) |
| 15 August 2025 Friday | |
| Weather forecast |  Sunny |
| Low temperature | 20.7 ° C (69.3°F) |
| High temperature | 33 ° C (91.4°F) |
| Avg. temperature | 26.6 ° C (79.8°F) |
| Humidity | % 78 |
| Chance of rain | 0% |
| UV Index | 0 |
| Sun Position | Sunrise:06:15 AM Sunset: 08:00 PM |
| Moon Position | Moonrise:11:18 PM Moonset: 01:37 PM Moon Phase ( Waning Gibbous ) |
| 16 August 2025 Saturday | |
| Weather forecast | Sunny |
| Low temperature | 22.5 ° C (72.5°F) |
| High temperature | 33.5 ° C (92.2°F) |
| Avg. temperature | 27.8 ° C (82°F) |
| Humidity | % 71 |
| Chance of rain | 0% |
| UV Index | 7 |
| Sun Position | Sunrise:06:16 AM Sunset: 07:59 PM |
| Moon Position | Moonrise:No moonrise Moonset: 02:53 PM Moon Phase ( Last Quarter ) |
| 17 August 2025 Sunday | |
| Weather forecast | Sunny |
| Low temperature | 23.8 ° C (74.9°F) |
| High temperature | 32.4 ° C (90.3°F) |
| Avg. temperature | 27.3 ° C (81.2°F) |
| Humidity | % 76 |
| Chance of rain | 0% |
| UV Index | 7 |
| Sun Position | Sunrise:06:17 AM Sunset: 07:58 PM |
| Moon Position | Moonrise:12:00 AM Moonset: 04:06 PM Moon Phase ( Waning Crescent ) |
| 18 August 2025 Monday | |
| Weather forecast |  Patchy rain nearby |
| Low temperature | 22.5 ° C (72.5°F) |
| High temperature | 33.1 ° C (91.6°F) |
| Avg. temperature | 27.3 ° C (81.1°F) |
| Humidity | % 79 |
| Chance of rain | 79% |
| UV Index | 6 |
| Sun Position | Sunrise:06:18 AM Sunset: 07:56 PM |
| Moon Position | Moonrise:12:53 AM Moonset: 05:10 PM Moon Phase ( Waning Crescent ) |
| 19 August 2025 Tuesday | |
| Weather forecast | Sunny |
| Low temperature | 24 ° C (75.1°F) |
| High temperature | 34.4 ° C (93.9°F) |
| Avg. temperature | 28.5 ° C (83.3°F) |
| Humidity | % 72 |
| Chance of rain | 0% |
| UV Index | 7 |
| Sun Position | Sunrise:06:19 AM Sunset: 07:55 PM |
| Moon Position | Moonrise:01:56 AM Moonset: 06:04 PM Moon Phase ( Waning Crescent ) |
| 20 August 2025 Wednesday | |
| Weather forecast | Patchy rain nearby |
| Low temperature | 21.9 ° C (71.4°F) |
| High temperature | 29.2 ° C (84.6°F) |
| Avg. temperature | 25.1 ° C (77.2°F) |
| Humidity | % 82 |
| Chance of rain | 84% |
| UV Index | 6 |
| Sun Position | Sunrise:06:20 AM Sunset: 07:53 PM |
| Moon Position | Moonrise:03:06 AM Moonset: 06:46 PM Moon Phase ( Waning Crescent ) |
| 21 August 2025 Thursday | |
| Weather forecast | Patchy rain nearby |
| Low temperature | 15.2 ° C (59.3°F) |
| High temperature | 23.8 ° C (74.9°F) |
| Avg. temperature | 19.8 ° C (67.7°F) |
| Humidity | % 79 |
| Chance of rain | 0% |
| UV Index | 4 |
| Sun Position | Sunrise:06:21 AM Sunset: 07:52 PM |
| Moon Position | Moonrise:04:19 AM Moonset: 07:20 PM Moon Phase ( Waning Crescent ) |
| 22 August 2025 Friday | |
| Weather forecast | Sunny |
| Low temperature | 12.3 ° C (54.1°F) |
| High temperature | 25.5 ° C (77.8°F) |
| Avg. temperature | 18.5 ° C (65.2°F) |
| Humidity | % 70 |
| Chance of rain | 0% |
| UV Index | 5 |
| Sun Position | Sunrise:06:22 AM Sunset: 07:51 PM |
| Moon Position | Moonrise:05:31 AM Moonset: 07:47 PM Moon Phase ( Waning Crescent ) |
| 23 August 2025 Saturday | |
| Weather forecast | Partly Cloudy |
| Low temperature | 15.8 ° C (60.4°F) |
| High temperature | 26.6 ° C (79.9°F) |
| Avg. temperature | 20.5 ° C (68.9°F) |
| Humidity | % 77 |
| Chance of rain | 0% |
| UV Index | 6 |
| Sun Position | Sunrise:06:23 AM Sunset: 07:49 PM |
| Moon Position | Moonrise:06:40 AM Moonset: 08:10 PM Moon Phase ( New Moon ) |
| 24 August 2025 Sunday | |
| Weather forecast | Partly Cloudy |
| Low temperature | 12.5 ° C (54.5°F) |
| High temperature | 24.7 ° C (76.4°F) |
| Avg. temperature | 18.8 ° C (65.8°F) |
| Humidity | % 76 |
| Chance of rain | 0% |
| UV Index | 5 |
| Sun Position | Sunrise:06:24 AM Sunset: 07:48 PM |
| Moon Position | Moonrise:07:46 AM Moonset: 08:31 PM Moon Phase ( Waxing Crescent ) |
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 11 August 2025 Monday | Moderate rain |
19.6 ° C (67.3°F) |
27.6 ° C (81.7°F) |
23 ° C (73.4°F) |
% 93 | 86% | 1.4 | Sunrise:06:11 AM Sunset: 08:06 PM |
Moonrise:09:28 PM Moonset: 08:40 AM Moon Phase ( Waning Gibbous ) |
|
| 12 August 2025 Tuesday | Moderate rain |
21.9 ° C (71.4°F) |
29.7 ° C (85.5°F) |
24.8 ° C (76.6°F) |
% 90 | 84% | 2 | Sunrise:06:12 AM Sunset: 08:04 PM |
Moonrise:09:51 PM Moonset: 09:53 AM Moon Phase ( Waning Gibbous ) |
|
| 13 August 2025 Wednesday | Moderate rain |
20.8 ° C (69.4°F) |
28.7 ° C (83.7°F) |
24.8 ° C (76.6°F) |
% 86 | 89% | 2.2 | Sunrise:06:13 AM Sunset: 08:03 PM |
Moonrise:10:16 PM Moonset: 11:06 AM Moon Phase ( Waning Gibbous ) |
|
| 14 August 2025 Thursday | Partly Cloudy |
19.2 ° C (66.6°F) |
29.7 ° C (85.5°F) |
23.3 ° C (73.9°F) |
% 84 | 0% | 2.1 | Sunrise:06:14 AM Sunset: 08:02 PM |
Moonrise:10:44 PM Moonset: 12:20 PM Moon Phase ( Waning Gibbous ) |
|
| 15 August 2025 Friday | Sunny |
20.7 ° C (69.3°F) |
33 ° C (91.4°F) |
26.6 ° C (79.8°F) |
% 78 | 0% | 0 | Sunrise:06:15 AM Sunset: 08:00 PM |
Moonrise:11:18 PM Moonset: 01:37 PM Moon Phase ( Waning Gibbous ) |
|
| 16 August 2025 Saturday | Sunny |
22.5 ° C (72.5°F) |
33.5 ° C (92.2°F) |
27.8 ° C (82°F) |
% 71 | 0% | 7 | Sunrise:06:16 AM Sunset: 07:59 PM |
Moonrise:No moonrise Moonset: 02:53 PM Moon Phase ( Last Quarter ) |
|
| 17 August 2025 Sunday | Sunny |
23.8 ° C (74.9°F) |
32.4 ° C (90.3°F) |
27.3 ° C (81.2°F) |
% 76 | 0% | 7 | Sunrise:06:17 AM Sunset: 07:58 PM |
Moonrise:12:00 AM Moonset: 04:06 PM Moon Phase ( Waning Crescent ) |
|
| 18 August 2025 Monday | Patchy rain nearby |
22.5 ° C (72.5°F) |
33.1 ° C (91.6°F) |
27.3 ° C (81.1°F) |
% 79 | 79% | 6 | Sunrise:06:18 AM Sunset: 07:56 PM |
Moonrise:12:53 AM Moonset: 05:10 PM Moon Phase ( Waning Crescent ) |
|
| 19 August 2025 Tuesday | Sunny |
24 ° C (75.1°F) |
34.4 ° C (93.9°F) |
28.5 ° C (83.3°F) |
% 72 | 0% | 7 | Sunrise:06:19 AM Sunset: 07:55 PM |
Moonrise:01:56 AM Moonset: 06:04 PM Moon Phase ( Waning Crescent ) |
|
| 20 August 2025 Wednesday | Patchy rain nearby |
21.9 ° C (71.4°F) |
29.2 ° C (84.6°F) |
25.1 ° C (77.2°F) |
% 82 | 84% | 6 | Sunrise:06:20 AM Sunset: 07:53 PM |
Moonrise:03:06 AM Moonset: 06:46 PM Moon Phase ( Waning Crescent ) |
|
| 21 August 2025 Thursday | Patchy rain nearby |
15.2 ° C (59.3°F) |
23.8 ° C (74.9°F) |
19.8 ° C (67.7°F) |
% 79 | 0% | 4 | Sunrise:06:21 AM Sunset: 07:52 PM |
Moonrise:04:19 AM Moonset: 07:20 PM Moon Phase ( Waning Crescent ) |
|
| 22 August 2025 Friday | Sunny |
12.3 ° C (54.1°F) |
25.5 ° C (77.8°F) |
18.5 ° C (65.2°F) |
% 70 | 0% | 5 | Sunrise:06:22 AM Sunset: 07:51 PM |
Moonrise:05:31 AM Moonset: 07:47 PM Moon Phase ( Waning Crescent ) |
|
| 23 August 2025 Saturday | Partly Cloudy |
15.8 ° C (60.4°F) |
26.6 ° C (79.9°F) |
20.5 ° C (68.9°F) |
% 77 | 0% | 6 | Sunrise:06:23 AM Sunset: 07:49 PM |
Moonrise:06:40 AM Moonset: 08:10 PM Moon Phase ( New Moon ) |
|
| 24 August 2025 Sunday | Partly Cloudy |
12.5 ° C (54.5°F) |
24.7 ° C (76.4°F) |
18.8 ° C (65.8°F) |
% 76 | 0% | 5 | Sunrise:06:24 AM Sunset: 07:48 PM |
Moonrise:07:46 AM Moonset: 08:31 PM Moon Phase ( Waxing Crescent ) |
|
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