Grayslake Weather Forecast 15 Days, Weather in Grayslake Today
Current weather conditions and 15 day weather forecast for Grayslake, 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 Grayslake
| 07 August 2026 Friday 21.7 ° C / 71.1°F  Partly Cloudy |
Feels Like : 24 ° C / 75.2°F Humidity : % 93 Pressure : 1018 mb Wind Speed : 9 kmph / 5.6 miles from SSW  Visibility : 2 km Precipitation (rainfall) : 0 mm Cloud (%) : 36 |
15 day weather forecast for Grayslake, IL, USA
Weather Forecast for next 15 Days for Grayslake 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 Grayslake, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 07 August 2026 Friday |  Sunny |
19.2 ° C (66.6°F) |
28.9 ° C (84°F) |
23.9 ° C (74.9°F) |
% 82 | 26% | 7.8 | Sunrise:05:51 AM Sunset: 08:04 PM |
Moonrise:Does not rise today Moonset: 03:40 PM Moon Phase ( Waning Crescent ) |
|
| 08 August 2026 Saturday | Sunny |
18.7 ° C (65.6°F) |
27.8 ° C (82.1°F) |
23.1 ° C (73.7°F) |
% 72 | 57% | 6.5 | Sunrise:05:52 AM Sunset: 08:03 PM |
Moonrise:12:25 AM Moonset: 04:51 PM Moon Phase ( Waning Crescent ) |
|
| 09 August 2026 Sunday | Sunny |
18.9 ° C (66.1°F) |
27.7 ° C (81.8°F) |
22.6 ° C (72.6°F) |
% 86 | 82% | 6 | Sunrise:05:53 AM Sunset: 08:02 PM |
Moonrise:01:22 AM Moonset: 05:53 PM Moon Phase ( Waning Crescent ) |
|
| 10 August 2026 Monday |  Mist |
19.6 ° C (67.2°F) |
25.7 ° C (78.2°F) |
22.5 ° C (72.5°F) |
% 92 | 86% | 5.1 | Sunrise:05:54 AM Sunset: 08:00 PM |
Moonrise:02:32 AM Moonset: 06:45 PM Moon Phase ( New Moon ) |
|
| 11 August 2026 Tuesday |  Light rain shower |
19.6 ° C (67.4°F) |
26.6 ° C (79.8°F) |
22.3 ° C (72.1°F) |
% 88 | 82% | 7 | Sunrise:05:55 AM Sunset: 07:59 PM |
Moonrise:03:53 AM Moonset: 07:26 PM Moon Phase ( New Moon ) |
|
| 12 August 2026 Wednesday | Sunny |
19.3 ° C (66.7°F) |
25 ° C (77°F) |
21.3 ° C (70.3°F) |
% 88 | 81% | 6 | Sunrise:05:56 AM Sunset: 07:58 PM |
Moonrise:05:17 AM Moonset: 07:58 PM Moon Phase ( New Moon ) |
|
| 13 August 2026 Thursday | Sunny |
13.1 ° C (55.6°F) |
20.3 ° C (68.6°F) |
17 ° C (62.6°F) |
% 75 | 10% | 6 | Sunrise:05:57 AM Sunset: 07:56 PM |
Moonrise:06:40 AM Moonset: 08:25 PM Moon Phase ( New Moon ) |
|
| 14 August 2026 Friday | Sunny |
12 ° C (53.5°F) |
23.6 ° C (74.4°F) |
17.5 ° C (63.5°F) |
% 71 | 6% | 6 | Sunrise:05:58 AM Sunset: 07:55 PM |
Moonrise:08:00 AM Moonset: 08:49 PM Moon Phase ( Waxing Crescent ) |
|
| 15 August 2026 Saturday | Sunny |
13.9 ° C (57°F) |
24.5 ° C (76.1°F) |
18.7 ° C (65.7°F) |
% 78 | 17% | 6 | Sunrise:05:59 AM Sunset: 07:53 PM |
Moonrise:09:18 AM Moonset: 09:12 PM Moon Phase ( Waxing Crescent ) |
|
| 16 August 2026 Sunday |  Patchy rain nearby |
18 ° C (64.4°F) |
24.2 ° C (75.5°F) |
20.7 ° C (69.2°F) |
% 87 | 55% | 6 | Sunrise:06:00 AM Sunset: 07:52 PM |
Moonrise:10:33 AM Moonset: 09:35 PM Moon Phase ( Waxing Crescent ) |
|
| 17 August 2026 Monday | Patchy rain nearby |
17.6 ° C (63.7°F) |
24 ° C (75.2°F) |
20.5 ° C (68.9°F) |
% 79 | 20% | 6 | Sunrise:06:01 AM Sunset: 07:50 PM |
Moonrise:11:46 AM Moonset: 10:01 PM Moon Phase ( Waxing Crescent ) |
|
| 18 August 2026 Tuesday | Patchy rain nearby |
18.9 ° C (66°F) |
26.2 ° C (79.1°F) |
22.5 ° C (72.4°F) |
% 83 | 70% | 7 | Sunrise:06:02 AM Sunset: 07:49 PM |
Moonrise:12:59 PM Moonset: 10:30 PM Moon Phase ( First Quarter ) |
|
| 19 August 2026 Wednesday | Patchy rain nearby |
13.3 ° C (55.9°F) |
18.2 ° C (64.8°F) |
16.8 ° C (62.2°F) |
% 68 | 36% | 5 | Sunrise:06:03 AM Sunset: 07:47 PM |
Moonrise:02:09 PM Moonset: 11:05 PM Moon Phase ( First Quarter ) |
|
| 20 August 2026 Thursday | Sunny |
10.9 ° C (51.6°F) |
22.8 ° C (73.1°F) |
16.8 ° C (62.2°F) |
% 65 | 4% | 6 | Sunrise:06:04 AM Sunset: 07:46 PM |
Moonrise:03:15 PM Moonset: 11:46 PM Moon Phase ( First Quarter ) |
|
Add a link to your web page; copy and paste this html to your web page