Crystal Lake Weather Forecast 15 Days, Weather in Crystal Lake Today
Current weather conditions and 15 day weather forecast for Crystal Lake, 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 Crystal Lake
| 01 October 2026 Thursday 18 ° C / 64.4°F  Fog |
Feels Like : 19 ° C / 66.2°F Humidity : % 98 Pressure : 1011 mb Wind Speed : 9 kmph / 5.6 miles from SSW  Visibility : 0 km Precipitation (rainfall) : 0.04 mm Cloud (%) : 100 |
15 day weather forecast for Crystal Lake, IL, USA
Weather Forecast for next 15 Days for Crystal Lake 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 Crystal Lake, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 01 October 2026 Thursday |  Light rain shower |
14.9 ° C (58.8°F) |
18.5 ° C (65.4°F) |
17 ° C (62.6°F) |
% 96 | 94% | 0.7 | Sunrise:06:50 AM Sunset: 06:35 PM |
Moonrise:09:08 PM Moonset: 12:29 PM Moon Phase ( Last Quarter ) |
|
| 02 October 2026 Friday |  Sunny |
10 ° C (49.9°F) |
15.3 ° C (59.5°F) |
13 ° C (55.4°F) |
% 72 | 11% | 5.1 | Sunrise:06:51 AM Sunset: 06:33 PM |
Moonrise:10:06 PM Moonset: 01:34 PM Moon Phase ( Last Quarter ) |
|
| 03 October 2026 Saturday | Sunny |
10.2 ° C (50.3°F) |
17.2 ° C (63°F) |
13.4 ° C (56.1°F) |
% 68 | 6% | 4.9 | Sunrise:06:52 AM Sunset: 06:31 PM |
Moonrise:11:15 PM Moonset: 02:30 PM Moon Phase ( Last Quarter ) |
|
| 04 October 2026 Sunday | Sunny |
10.3 ° C (50.6°F) |
17.3 ° C (63.2°F) |
13.9 ° C (57°F) |
% 70 | 7% | 4.5 | Sunrise:06:53 AM Sunset: 06:30 PM |
Moonrise:Does not rise today Moonset: 03:17 PM Moon Phase ( Last Quarter ) |
|
| 05 October 2026 Monday | Sunny |
6.6 ° C (43.9°F) |
12.1 ° C (53.8°F) |
9.4 ° C (48.9°F) |
% 61 | 4% | 4 | Sunrise:06:54 AM Sunset: 06:28 PM |
Moonrise:12:31 AM Moonset: 03:54 PM Moon Phase ( Waning Crescent ) |
|
| 06 October 2026 Tuesday | Sunny |
6.1 ° C (43°F) |
12.6 ° C (54.7°F) |
9.3 ° C (48.7°F) |
% 64 | 8% | 4 | Sunrise:06:55 AM Sunset: 06:26 PM |
Moonrise:01:50 AM Moonset: 04:24 PM Moon Phase ( Waning Crescent ) |
|
| 07 October 2026 Wednesday |  Overcast |
10.1 ° C (50.2°F) |
17.7 ° C (63.9°F) |
13 ° C (55.4°F) |
% 64 | 9% | 5 | Sunrise:06:57 AM Sunset: 06:25 PM |
Moonrise:03:08 AM Moonset: 04:50 PM Moon Phase ( Waning Crescent ) |
|
| 08 October 2026 Thursday | Overcast |
10.3 ° C (50.5°F) |
17.6 ° C (63.7°F) |
13.6 ° C (56.6°F) |
% 59 | 18% | 5 | Sunrise:06:58 AM Sunset: 06:23 PM |
Moonrise:04:26 AM Moonset: 05:14 PM Moon Phase ( Waning Crescent ) |
|
| 09 October 2026 Friday |  Patchy rain nearby |
3.9 ° C (39°F) |
10.8 ° C (51.5°F) |
8.1 ° C (46.5°F) |
% 76 | 77% | 4 | Sunrise:06:59 AM Sunset: 06:21 PM |
Moonrise:05:42 AM Moonset: 05:37 PM Moon Phase ( New Moon ) |
|
| 10 October 2026 Saturday | Sunny |
0.5 ° C (32.8°F) |
8 ° C (46.3°F) |
4.3 ° C (39.8°F) |
% 65 | 5% | 3 | Sunrise:07:00 AM Sunset: 06:20 PM |
Moonrise:06:58 AM Moonset: 06:01 PM Moon Phase ( New Moon ) |
|
| 11 October 2026 Sunday | Sunny |
2.3 ° C (36.2°F) |
11.8 ° C (53.3°F) |
6.9 ° C (44.5°F) |
% 63 | 6% | 4 | Sunrise:07:01 AM Sunset: 06:18 PM |
Moonrise:08:13 AM Moonset: 06:28 PM Moon Phase ( New Moon ) |
|
| 12 October 2026 Monday | Overcast |
7.9 ° C (46.1°F) |
14.7 ° C (58.5°F) |
11.1 ° C (52°F) |
% 65 | 36% | 3 | Sunrise:07:02 AM Sunset: 06:16 PM |
Moonrise:09:28 AM Moonset: 06:59 PM Moon Phase ( Waxing Crescent ) |
|
| 13 October 2026 Tuesday | Patchy rain nearby |
6.6 ° C (43.9°F) |
11.7 ° C (53.1°F) |
9.3 ° C (48.7°F) |
% 90 | 87% | 3 | Sunrise:07:03 AM Sunset: 06:15 PM |
Moonrise:10:41 AM Moonset: 07:37 PM Moon Phase ( Waxing Crescent ) |
|
| 14 October 2026 Wednesday | Overcast |
4.6 ° C (40.2°F) |
10.3 ° C (50.6°F) |
7.8 ° C (46.1°F) |
% 81 | 24% | 3 | Sunrise:07:04 AM Sunset: 06:13 PM |
Moonrise:11:49 AM Moonset: 08:22 PM Moon Phase ( Waxing Crescent ) |
|
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