Current Conditions

Round Lake Beach, Illinois

89°F32°C

Drizzle

Feels like96°F35°C

Wind

SW 8 mph13 km/h

Humidity

57%

Cloud Cover

53%

As of Wednesday, September 2, 2026 at 11:30 AM CDT

Today's Outlook

Day

Mostly cloudy and hot, with a high of 91°F33°C and morning low of 76°F24°C — feels like 99°F37°C. Breezy from the WSW at 7 to 8 mph11 to 13 km/h. 12% chance of drizzle in the afternoon. Heat risk in the afternoon.

Night

Mostly clear, with a low around 81°F27°C. Light wind from the SW around 5 mph7 km/h. 13% chance of drizzle throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Drizzle	High 91°F33°CFeels 98°F37°C	Low 76°F24°C	Precip 0.02 in0.4 mm13%	Cloud 46%	Wind SW 6 mph10 km/h	Wednesday: Mostly cloudy and hot, with a high of 91°F33°C and morning low of 76°F24°C — feels like 99°F37°C. Breezy from the WSW at 7 to 8 mph11 to 13 km/h. 12% chance of drizzle in the afternoon. Heat risk in the afternoon. Wednesday Night: Mostly clear, with a low around 81°F27°C. Light wind from the SW around 5 mph7 km/h. 13% chance of drizzle throughout the night.
Drizzle	High 86°F30°CFeels 92°F33°C	Low 76°F25°C	Precip 0.06 in1.4 mm21%	Cloud 45%	Wind S 6 mph9 km/h	Thursday: Mostly cloudy and warm, with a high of 86°F30°C and morning low of 76°F25°C — feels like 91°F33°C. Light wind from the SW around 6 mph10 km/h. 21% chance of drizzle throughout the day. Heavy, humid air. Thursday Night: Partly cloudy, with a low around 77°F25°C. Light wind from the SSE around 6 mph9 km/h. 13% chance of drizzle throughout the night.
Showers	High 85°F29°CFeels 92°F33°C	Low 75°F24°C	Precip 0.19 in4.8 mm40%	Cloud 65%	Wind ESE 6 mph10 km/h	Friday: Mostly cloudy and warm, with a high of 85°F29°C and morning low of 75°F24°C — feels like 91°F33°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h. 29% chance of light rain throughout the day. Heavy, humid air. Friday Night: Mostly cloudy, with a low around 75°F24°C. Breezy from the E at 6 to 7 mph10 to 12 km/h. 40% chance of showers throughout the night.
Showers	High 81°F27°CFeels 85°F29°C	Low 73°F23°C	Precip 0.13 in3.2 mm30%	Cloud 57%	Wind ENE 7 mph10 km/h	Saturday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 73°F23°C. Breezy from the ENE at 6 to 8 mph10 to 13 km/h. 25% chance of showers throughout the day. Heavy, humid air. Saturday Night: Mostly cloudy, with a low around 73°F23°C. Breezy from the ENE at 7 to 8 mph10 to 12 km/h. 30% chance of showers overnight.
Drizzle	High 79°F26°C	Low 71°F22°C	Precip 0.07 in1.7 mm15%	Cloud 60%	Wind ESE 6 mph10 km/h	Sunday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 71°F22°C. Breezy from the ESE at 7 to 8 mph11 to 12 km/h. 15% chance of drizzle throughout the day. Humid. Sunday Night: Mostly cloudy, with a low around 71°F22°C. Light wind from the E around 6 mph10 km/h.
Partly Cloudy	High 80°F26°C	Low 69°F21°C	Precip 0.02 in0.5 mm6%	Cloud 57%	Wind SE 7 mph11 km/h	Monday: Mostly cloudy and warm, with a high of 80°F26°C and morning low of 69°F21°C. Breezy from the SE at 7 to 8 mph11 to 13 km/h. Monday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the SE at 7 to 8 mph11 to 13 km/h.
Partly Cloudy	High 86°F30°CFeels 89°F32°C	Low 69°F21°C	Precip 0.02 in0.5 mm6%	Cloud 60%	Wind S 10 mph16 km/h	Tuesday: Mostly cloudy and hot, with a high of 86°F30°C and morning low of 69°F21°C. Breezy from the S at 10 to 11 mph16 to 18 km/h. Humid. Tuesday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the S at 10 to 11 mph15 to 18 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	91°F33°C Feels 98°F37°C	76°F24°C	0.02 in0.4 mm· 13%	46%	Drizzle	SW 6 mph10 km/h
DayMostly cloudy and hot, with a high of 91°F33°C and morning low of 76°F24°C — feels like 99°F37°C. Breezy from the WSW at 7 to 8 mph11 to 13 km/h. 12% chance of drizzle in the afternoon. Heat risk in the afternoon. NightMostly clear, with a low around 81°F27°C. Light wind from the SW around 5 mph7 km/h. 13% chance of drizzle throughout the night.
	ThursdaySep 3	86°F30°C Feels 92°F33°C	76°F25°C	0.06 in1.4 mm· 21%	45%	Drizzle	S 6 mph9 km/h
DayMostly cloudy and warm, with a high of 86°F30°C and morning low of 76°F25°C — feels like 91°F33°C. Light wind from the SW around 6 mph10 km/h. 21% chance of drizzle throughout the day. Heavy, humid air. NightPartly cloudy, with a low around 77°F25°C. Light wind from the SSE around 6 mph9 km/h. 13% chance of drizzle throughout the night.
	FridaySep 4	85°F29°C Feels 92°F33°C	75°F24°C	0.19 in4.8 mm· 40%	65%	Showers	ESE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 85°F29°C and morning low of 75°F24°C — feels like 91°F33°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h. 29% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 75°F24°C. Breezy from the E at 6 to 7 mph10 to 12 km/h. 40% chance of showers throughout the night.
	SaturdaySep 5	81°F27°C Feels 85°F29°C	73°F23°C	0.13 in3.2 mm· 30%	57%	Showers	ENE 7 mph10 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 73°F23°C. Breezy from the ENE at 6 to 8 mph10 to 13 km/h. 25% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 73°F23°C. Breezy from the ENE at 7 to 8 mph10 to 12 km/h. 30% chance of showers overnight.
	SundaySep 6	79°F26°C	71°F22°C	0.07 in1.7 mm· 15%	60%	Drizzle	ESE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 71°F22°C. Breezy from the ESE at 7 to 8 mph11 to 12 km/h. 15% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 71°F22°C. Light wind from the E around 6 mph10 km/h.
	MondaySep 7	80°F26°C	69°F21°C	0.02 in0.5 mm· 6%	57%	Partly Cloudy	SE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 80°F26°C and morning low of 69°F21°C. Breezy from the SE at 7 to 8 mph11 to 13 km/h. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SE at 7 to 8 mph11 to 13 km/h.
	TuesdaySep 8	86°F30°C Feels 89°F32°C	69°F21°C	0.02 in0.5 mm· 6%	60%	Partly Cloudy	S 10 mph16 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 69°F21°C. Breezy from the S at 10 to 11 mph16 to 18 km/h. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the S at 10 to 11 mph15 to 18 km/h.
	WednesdaySep 9	90°F32°C Feels 94°F34°C	76°F24°C	0.05 in1.2 mm· 11%	38%	Drizzle	SW 10 mph17 km/h
DayPartly cloudy and hot, with a high of 90°F32°C and morning low of 76°F24°C. Breezy from the SW at 10 to 11 mph17 to 17 km/h. 10% chance of drizzle in the morning. Humid. NightPartly cloudy, with a low around 77°F25°C. Breezy from the SW at 10 to 12 mph17 to 19 km/h. 11% chance of drizzle in the evening.
	ThursdaySep 10	83°F28°C	73°F23°C	0.17 in4.2 mm· 21%	51%	Showers	WSW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 73°F23°C. Breezy from the WSW at 9 mph14 km/h. 21% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 74°F24°C. Breezy from the SW at 9 to 10 mph14 to 16 km/h. 19% chance of showers throughout the night.
	FridaySep 11	82°F28°C	70°F21°C	0.17 in4.2 mm· 22%	58%	Showers	SSW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 70°F21°C. Breezy from the SW at 9 to 10 mph15 to 15 km/h. 22% chance of showers throughout the day. NightMostly cloudy, with a low around 72°F22°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 22% chance of showers throughout the night.
	SaturdaySep 12	80°F27°C	69°F21°C	0.19 in4.7 mm· 24%	61%	Showers	SW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 69°F21°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SW at 9 mph14 km/h. 23% chance of showers throughout the night.
	SundaySep 13	78°F25°C	67°F19°C	0.18 in4.5 mm· 21%	58%	Showers	WSW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 78°F25°C and morning low of 67°F19°C. Breezy from the WSW at 9 to 10 mph15 to 16 km/h. 21% chance of showers throughout the day. NightMostly cloudy, with a low around 68°F20°C. Breezy from the WSW at 9 mph15 km/h. 18% chance of showers throughout the night.
	MondaySep 14	75°F24°C	64°F18°C	0.17 in4.3 mm· 20%	58%	Showers	W 9 mph15 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 64°F18°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 18% chance of showers throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the WSW at 9 mph14 km/h. 20% chance of showers throughout the night.
	TuesdaySep 15	74°F23°C	63°F17°C	0.15 in3.9 mm· 18%	52%	Showers	SW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 63°F17°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 18% chance of showers throughout the day. NightPartly cloudy, with a low around 64°F18°C. Breezy from the WSW at 9 mph14 km/h. 16% chance of showers throughout the night.
	WednesdaySep 16	74°F23°C	61°F16°C	0.09 in2.2 mm· 13%	44%	Drizzle	SSW 9 mph14 km/h
DayPartly cloudy and warm, with a high of 74°F23°C and morning low of 61°F16°C. Breezy from the SSW at 9 mph14 km/h. 10% chance of drizzle throughout the day. NightPartly cloudy, with a low around 63°F17°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 13% chance of drizzle throughout the night.

Nearby Cities

Round Lake1 mi2 km Grayslake3 mi5 km Mundelein9 mi14 km Libertyville9 mi15 km McHenry9 mi15 km Gurnee10 mi15 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 42.3717°N, 88.0901°W·Elevation: 233m·Timezone: America/Chicago·Population: 27,852