Algonquin Weather Forecast 15 Days, Weather in Algonquin Today
Current weather conditions and 15 day weather forecast for Algonquin, 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 Algonquin
| 15 December 2025 Monday -14.9 ° C / 5.2°F  Clear |
Feels Like : -25.4 ° C / -13.8°F Humidity : % 69 Pressure : 1026 mb Wind Speed : 27 kmph / 16.8 miles from SSW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Algonquin, IL, USA
Weather Forecast for next 15 Days for Algonquin 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 Algonquin, 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 |
-19.9 ° C (-3.8°F) |
-3.4 ° C (25.9°F) |
-11.4 ° C (11.4°F) |
% 75 | 0% | 0.3 | Sunrise:07:15 AM Sunset: 04:22 PM |
Moonrise:03:13 AM Moonset: 01:21 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Mist |
-8.3 ° C (17.1°F) |
0.9 ° C (33.6°F) |
-4.1 ° C (24.7°F) |
% 92 | 0% | 0.3 | Sunrise:07:16 AM Sunset: 04:22 PM |
Moonrise:04:17 AM Moonset: 01:47 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday |  Overcast |
-2.6 ° C (27.2°F) |
0.3 ° C (32.5°F) |
-0.9 ° C (30.3°F) |
% 94 | 0% | 0.3 | Sunrise:07:16 AM Sunset: 04:22 PM |
Moonrise:05:21 AM Moonset: 02:18 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday |  Moderate rain |
-9.4 ° C (15.1°F) |
8.2 ° C (46.8°F) |
1.9 ° C (35.3°F) |
% 85 | 87% | 0.1 | Sunrise:07:17 AM Sunset: 04:23 PM |
Moonrise:06:23 AM Moonset: 02:57 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday | Overcast |
-12.8 ° C (9°F) |
-7.6 ° C (18.4°F) |
-8.7 ° C (16.3°F) |
% 67 | 0% | 0 | Sunrise:07:18 AM Sunset: 04:23 PM |
Moonrise:07:21 AM Moonset: 03:45 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday |  Moderate snow |
-4.6 ° C (23.8°F) |
2.1 ° C (35.8°F) |
-0.8 ° C (30.6°F) |
% 69 | 88% | 1 | Sunrise:07:18 AM Sunset: 04:24 PM |
Moonrise:08:13 AM Moonset: 04:41 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Sunny |
-10.7 ° C (12.8°F) |
-6.1 ° C (21.1°F) |
-6.6 ° C (20°F) |
% 77 | 0% | 2 | Sunrise:07:19 AM Sunset: 04:24 PM |
Moonrise:08:56 AM Moonset: 05:44 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Partly Cloudy |
-11.2 ° C (11.9°F) |
-0.2 ° C (31.6°F) |
-5.3 ° C (22.4°F) |
% 71 | 0% | 2 | Sunrise:07:19 AM Sunset: 04:25 PM |
Moonrise:09:32 AM Moonset: 06:50 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Partly Cloudy |
-0 ° C (32°F) |
4.6 ° C (40.2°F) |
2.1 ° C (35.7°F) |
% 76 | 0% | 2 | Sunrise:07:20 AM Sunset: 04:25 PM |
Moonrise:10:01 AM Moonset: 07:58 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Sunny |
-6.8 ° C (19.7°F) |
-0.7 ° C (30.7°F) |
-2.2 ° C (28°F) |
% 71 | 0% | 2 | Sunrise:07:20 AM Sunset: 04:26 PM |
Moonrise:10:26 AM Moonset: 09:06 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Light freezing rain |
-9.5 ° C (14.9°F) |
-3.3 ° C (26°F) |
-6.2 ° C (20.8°F) |
% 52 | 64% | 1 | Sunrise:07:21 AM Sunset: 04:26 PM |
Moonrise:10:48 AM Moonset: 10:14 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday |  Light snow |
-11.9 ° C (10.5°F) |
-5 ° C (23°F) |
-6.8 ° C (19.8°F) |
% 76 | 62% | 1 | Sunrise:07:21 AM Sunset: 04:27 PM |
Moonrise:11:09 AM Moonset: 11:24 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Overcast |
-14.5 ° C (5.8°F) |
-10.2 ° C (13.7°F) |
-12.2 ° C (10°F) |
% 60 | 0% | 1 | Sunrise:07:21 AM Sunset: 04:28 PM |
Moonrise:11:30 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Light freezing rain |
-11.4 ° C (11.5°F) |
-3.7 ° C (25.3°F) |
-7.3 ° C (18.8°F) |
% 71 | 71% | 1 | Sunrise:07:21 AM Sunset: 04:29 PM |
Moonrise:11:52 AM Moonset: 12:35 AM Moon Phase ( Waxing Gibbous ) |
|
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