Griffith Lake, IL 14 Day Weather
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Griffith Lake, IL Weather Forecast


Griffith Lake, IL Weather Forecast Dated: 1236 AM Thu Sep 10 2026
Expect a very warm period with a mix of sun and clouds and frequent chances of rain over the coming period. moderate humidity and no major pressure swings will dominate.
Thursday, September 10, 2026
Mid-Morning
75°F 24°C
Light Showers
Mid-Afternoon
83°F 28°C
Light Showers
Early-Evening
73°F 23°C
Light Showers
Warm and summery around 83°F 28°C (feels like 88°F 31°C), rounds of showers expected off and on all day, with steady humidity and steady pressure. Winds turning from the SSE to the ENE at 9 mph 13 km/h.
Friday, September 11, 2026
Mid-Morning
69°F 21°C
Overcast
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
73°F 23°C
Overcast
Comfortable with temperatures reaching 70°F 21°C, overcast throughout the day, with steady humidity and steady pressure. Winds switching from the ENE to the SSE at 4 mph 6 km/h.
Saturday, September 12, 2026
Mid-Morning
73°F 23°C
Partly Cloudy
Mid-Afternoon
89°F 32°C
Overcast
Early-Evening
83°F 28°C
Overcast
Very warm near 89°F 32°C, though humidity makes it feel like 92°F 34°C, partly cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure.
Sunday, September 13, 2026
Mid-Morning
79°F 26°C
Overcast
Mid-Afternoon
96°F 35°C
Overcast
Early-Evening
87°F 31°C
Sunny
Hot temperatures near 96°F 35°C, overcast through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds moving from the S to the ESE at 8 mph 13 km/h.
Monday, September 14, 2026
Mid-Morning
83°F 28°C
Sunny
Mid-Afternoon
100°F 38°C
Sunny
Early-Evening
91°F 33°C
Partly Cloudy
Scorching hot near 100°F 38°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and steady pressure. Winds out of the SSW at 14 mph 23 km/h. Gusts up to 25 mph 40 km/h.
Tuesday, September 15, 2026
Mid-Morning
86°F 30°C
Partly Cloudy
Mid-Afternoon
96°F 36°C
Scattered Showers
Early-Evening
82°F 28°C
Light Showers
Very hot with a high of 96°F 36°C, feeling closer to 99°F 37°C in the humidity, locally heavy downpours at times, with increasing humidity and steady pressure. Winds shifting from the WSW to the NNE at 11 mph 17 km/h. Gusts up to 20 mph 33 km/h.
Wednesday, September 16, 2026
Mid-Morning
68°F 20°C
Scattered Showers
Mid-Afternoon
83°F 28°C
Partly Cloudy
Early-Evening
76°F 24°C
Partly Cloudy
Balmy with temperatures reaching 83°F 28°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds turning from the NE to the NNE at 10 mph 15 km/h.
Thursday, September 17, 2026
Mid-Morning
75°F 24°C
Light Showers
Mid-Afternoon
92°F 34°C
Scattered Showers
Early-Evening
75°F 24°C
Overcast
Hot and sweltering around 92°F 34°C (heat index 96°F 36°C), scattered downpours possible, with steady humidity and barometric pressure falling. Winds switching from the SSE to the WSW at 13 mph 21 km/h. Gusts up to 26 mph 41 km/h.
Friday, September 18, 2026
Mid-Morning
62°F 17°C
Overcast
Mid-Afternoon
69°F 21°C
Scattered Showers
Early-Evening
65°F 18°C
Scattered Showers
Mild temperatures up to 69°F 21°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds moving from the WNW to the SW at 11 mph 18 km/h. Gusts up to 20 mph 32 km/h.
Saturday, September 19, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
68°F 20°C
Sunny
Mild with a high of 75°F 24°C, sunny throughout the day, with lower humidity and steady pressure. Winds NNE at 7 mph 12 km/h.
Sunday, September 20, 2026
Mid-Morning
63°F 17°C
Sunny
Mid-Afternoon
76°F 25°C
Sunny
Early-Evening
69°F 21°C
Sunny
Pleasant near 76°F 25°C, sunny throughout the day, with lower humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
67°F 19°C
Overcast
Mid-Afternoon
83°F 28°C
Sunny
Early-Evening
76°F 25°C
Sunny
Balmy with temperatures reaching 83°F 28°C, cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds shifting from the ENE to the SSE at 8 mph 12 km/h.
Tuesday, September 22, 2026
Mid-Morning
75°F 24°C
Sunny
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
79°F 26°C
Sunny
Quite warm around 87°F 31°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the S to the SE at 7 mph 11 km/h.
Wednesday, September 23, 2026
Mid-Morning
75°F 24°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
81°F 28°C
Sunny
Hot temperatures near 90°F 32°C, sunny throughout the day, with steady humidity and steady pressure. Winds increasing from the ENE at 6 mph 10 km/h to N at 14 mph 22 km/h. Gusts up to 21 mph 34 km/h.
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