Grayslake, IL Hourly Weather Forecast
Next 48 Hours
Wed, Feb 18th 2026
Sunny skies giving way to Clear conditions by evening. Warming trend from 41°F to 65°. Breezy wind, shifting from SW to SW at 12.8 mph, as humidity fluctuates between 13% to 93%, and an avg barometric pressure of 29.56 inHg.
| Wed, Feb 18th | Temp | Humidity | Wind (mph) | Pressure (inHg) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
7 AM Overcast  UV: 0 |
52°F Feels 47°F |
93% | 14.8 SW | 29.45 | 50.3°F | 0% |
8 AM Partly Cloudy  UV: 0.4 |
52°F Feels 48°F |
92% | 14.8 SW | 29.47 | 49.3°F | 0% |
9 AM Sunny UV: 1 |
53°F Feels 49°F |
92% | 15.2 SW | 29.48 | 50.7°F | 0% |
10 AM SunnyUV: 1.6 |
55°F Feels 51°F |
78% | 16.8 WSW | 29.47 | 47.6°F | 0% |
11 AM SunnyUV: 2.2 |
57°F Feels 53°F |
73% | 17.2 WSW | 29.49 | 48.2°F | 0% |
12 PM SunnyUV: 2.3 |
59°F Feels 57°F |
65% | 15.9 WSW | 29.49 | 47.4°F | 0% |
1 PM SunnyUV: 2 |
61°F Feels 60°F |
54% | 15.7 W | 29.49 | 44.3°F | 0% |
2 PM SunnyUV: 1.4 |
63°F Feels 63°F |
38% | 14.1 WSW | 29.51 | 37.3°F | 0% |
3 PM SunnyUV: 0.8 |
65°F Feels 64°F |
20% | 13.9 WSW | 29.52 | 23.5°F | 0% |
4 PM SunnyUV: 0.3 |
63°F Feels 63°F |
13% | 14.8 WSW | 29.55 | 14.7°F | 0% |
5 PM SunnyUV: 0 |
61°F Feels 59°F |
30% | 13.4 WSW | 29.56 | 29.8°F | 0% |
6 PM Clear  UV: 0 |
57°F Feels 54°F |
35% | 11 WSW | 29.59 | 31.1°F | 0% |
7 PM Clear UV: 0 |
51°F Feels 47°F |
52% | 9.8 SW | 29.64 | 35.7°F | 0% |
8 PM Clear UV: 0 |
47°F Feels 43°F |
54% | 8.5 SW | 29.65 | 29.6°F | 0% |
9 PM Clear UV: 0 |
44°F Feels 40°F |
60% | 8.1 SW | 29.67 | 29.9°F | 0% |
10 PM Cloudy  UV: 0 |
42°F Feels 38°F |
68% | 7.4 SW | 29.72 | 31.5°F | 0% |
11 PM Clear UV: 0 |
41°F Feels 37°F |
64% | 6.5 SW | 29.69 | 29.3°F | 0% |
Thu, Feb 19th 2026
Cloudy skies early, becoming Overcast conditions later. Rain forecasted to be scattered thunderstorms (up to 0.03in), moderate or heavy rain in area with thunder (up to 0.04in). Temps range from 37° to 45°. Light winds, shifting from WSW to ESE at 5.7 mph, with humidity levels between 63% to 98%, and an avg barometric pressure of 29.66 inHg.
| Thu, Feb 19th | Temp | Humidity | Wind (mph) | Pressure (inHg) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM Partly Cloudy  UV: 0 |
41°F Feels 37°F |
63% | 5.8 WSW | 29.7 | 28.6°F | 0% |
1 AM Overcast  UV: 0 |
40°F Feels 37°F |
67% | 4.7 W | 29.75 | 30.1°F | 0% |
2 AM Overcast UV: 0 |
40°F Feels 37°F |
68% | 3.1 WNW | 29.75 | 30.2°F | 0% |
3 AM Overcast UV: 0 |
40°F Feels 37°F |
69% | 1.3 W | 29.75 | 30.3°F | 0% |
4 AM Cloudy UV: 0 |
39°F Feels 36°F |
69% | 1.1 W | 29.75 | 30.3°F | 0% |
5 AM Cloudy UV: 0 |
38°F Feels 35°F |
74% | 3.1 NNW | 29.75 | 30.4°F | 0% |
6 AM Cloudy UV: 0 |
37°F Feels 34°F |
76% | 3.8 NNE | 29.75 | 30.5°F | 0% |
7 AM Cloudy  UV: 0 |
39°F Feels 35°F |
78% | 4.9 NNE | 29.75 | 30.5°F | 0% |
8 AM Cloudy UV: 0.4 |
40°F Feels 36°F |
73% | 4.5 NNE | 29.74 | 32.1°F | 0% |
9 AM Cloudy UV: 0.9 |
42°F Feels 38°F |
70% | 4.3 NE | 29.74 | 32.9°F | 0% |
10 AM SunnyUV: 1.4 |
43°F Feels 39°F |
68% | 5.8 ENE | 29.73 | 33.7°F | 0% |
11 AM Cloudy UV: 1.7 |
44°F Feels 40°F |
78% | 6.7 ENE | 29.71 | 37.8°F | 0% |
12 PM Cloudy UV: 1.9 |
45°F Feels 41°F |
82% | 6.5 E | 29.69 | 39.9°F | 0% |
1 PM Scattered Thunderstorms UV: 1.9 |
45°F Feels 40°F |
87% | 6.9 E | 29.68 | 42°F | 0% |
2 PM Scattered ThunderstormsUV: 1.3 |
45°F Feels 40°F |
90% | 7.4 E | 29.65 | 41.8°F | 0% |
3 PM Scattered ThunderstormsUV: 0.7 |
44°F Feels 40°F |
91% | 8.1 ENE | 29.64 | 41.8°F | 0% |
4 PM Overcast UV: 0.2 |
44°F Feels 39°F |
92% | 8.3 NE | 29.62 | 41.7°F | 0% |
5 PM Overcast UV: 0 |
44°F Feels 38°F |
95% | 8.7 NE | 29.6 | 42.1°F | 0% |
6 PM Overcast UV: 0 |
43°F Feels 37°F |
97% | 8.7 NE | 29.59 | 42.3°F | 0% |
7 PM Scattered Thunderstorms UV: 0 |
43°F Feels 37°F |
98% | 8.7 ENE | 29.57 | 42.5°F | 0% |
8 PM Scattered ThunderstormsUV: 0 |
44°F Feels 37°F |
98% | 8.9 ENE | 29.53 | 42.9°F | 100% Rain est. 0.02in |
9 PM Scattered ThunderstormsUV: 0 |
44°F Feels 37°F |
98% | 7.8 NE | 29.5 | 43.2°F | 100% Rain est. 0.03in |
10 PM Moderate Or Heavy Rain In Area With Thunder UV: 0 |
42°F Feels 38°F |
98% | 4.9 NE | 29.48 | 43.4°F | 100% Rain est. 0.04in |
11 PM Mist UV: 0 |
42°F Feels 37°F |
96% | 2.7 ESE | 29.42 | 38.8°F | 0% |
Fri, Feb 20th 2026
Cloudy skies early, becoming moderate or heavy rain in area with thunder later. Rain forecasted to be moderate or heavy rain in area with thunder (up to 0.23in). Temps range from 40° to 45°. Windy conditions, shifting from S to W at 17.2 mph, with humidity levels between 90% to 98%, and an avg barometric pressure of 29.38 inHg.
| Fri, Feb 20th | Temp | Humidity | Wind (mph) | Pressure (inHg) | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM Moderate Or Heavy Rain In Area With ThunderUV: 0 |
42°F Feels 36°F |
98% | 5.1 S | 29.41 | 41.4°F | 100% Rain est. 0.19in |
1 AM Moderate Or Heavy Rain In Area With ThunderUV: 0 |
43°F Feels 37°F |
98% | 13.4 SSW | 29.39 | 40.8°F | 100% Rain est. 0.23in |
2 AM Moderate Or Heavy Rain In Area With ThunderUV: 0 |
44°F Feels 38°F |
97% | 20.1 SW | 29.37 | 42.6°F | 100% Rain est. 0.12in |
3 AM Moderate Or Heavy Rain In Area With ThunderUV: 0 |
45°F Feels 39°F |
96% | 19.2 W | 29.36 | 43.5°F | 100% Rain est. 0.06in |
4 AM Cloudy UV: 0 |
43°F Feels 36°F |
95% | 21.3 W | 29.35 | 44.5°F | 0% |
5 AM Cloudy UV: 0 |
42°F Feels 34°F |
92% | 20.8 WSW | 29.38 | 40°F | 0% |
6 AM Cloudy UV: 0 |
40°F Feels 31°F |
90% | 20.8 W | 29.4 | 37.7°F | 0% |
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 |
52°F |
29.43 inHg.
Barometer 89%
Humidity SW 17.9mph Wind |
| Light rain | ||
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