Observed 4:40 PM CDT at KPWK

Crystal Lake, IL weather

Mostly cloudy and 68°20°, 15°8° warmer than a typical Oct 24.

Forecasts agree

Now 68°20°

Mostly cloudy

Wind: 8 mph13 km/h; From the east-southeast. Up to 8 mph13 km/h through 4 AM
Dew point: 48°9°; Comfortable
UV tomorrow: 3Moderate; Moderate 12–4 PM · peak 3
Air quality: 62Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.37 inHg1028 hPa; Falling slowly · −0.03 inHg−1.1 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Below 60°16° tonight after 8 PM
Low 48°9° tomorrow at 7 AM
Above 60°16° tomorrow by 10 AM

This afternoonNear 71°22° · Clear
TonightDown to 49°9° by 5 AM · Partly cloudy
Tomorrow morningUp to 65°18° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 74°23° by 3 PM · Partly cloudy
Tomorrow nightDown to 48°9° by 5 AM · Mostly cloudy
Monday morningUp to 60°16° by 11 AM · Cloudy
Monday afternoonNear 63°17° · Cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 4p	Partly sunny	72°22° (likely 66°19° to 72°22°)	72°22°	0%	10 mph16 km/h from S, gusts 13 mph20 km/h	44%	26%	1
Sat 5p	Sunny	70°21° (likely 64°18° to 70°21°)	70°21°	0%	5 mph8 km/h from S, gusts 13 mph22 km/h	47%	23%	0
Sat 6p	Mostly cloudy	66°19° (likely 60°16° to 66°19°)	66°19°	0%	5 mph8 km/h from S, gusts 12 mph19 km/h	53%	59%	0
Sat 7p	Mostly cloudy	61°16° (likely 58°14° to 61°16°)	61°16°	0%	5 mph8 km/h from SSE, gusts 10 mph16 km/h	62%	53%	0
Sat 8p	Partly cloudy	59°15° (likely 56°13° to 59°15°)	59°15°	0%	5 mph8 km/h from SSE, gusts 10 mph17 km/h	67%	30%	0
Sat 9p	Clear	57°14° (likely 55°13° to 58°14°)	57°14°	0%	5 mph8 km/h from S, gusts 10 mph17 km/h	72%	11%	0
Sat 10p	Clear	55°13° (likely 54°12° to 57°14°)	55°13°	0%	5 mph8 km/h from S, gusts 11 mph17 km/h	75%	20%	0
Sat 11p	Partly cloudy	54°12° (likely 54°12° to 56°13°)	54°12°	0%	5 mph8 km/h from S, gusts 11 mph18 km/h	76%	31%	0
Sun 12a	Partly cloudy	53°12° (likely 53°12° to 55°13°)	53°12°	0%	5 mph8 km/h from S, gusts 12 mph19 km/h	77%	26%	0
Sun 1a	Partly cloudy	52°11° (likely 52°11° to 54°12°)	52°11°	0%	5 mph8 km/h from S, gusts 12 mph19 km/h	79%	73%	0
Sun 2a	Partly cloudy	52°11° (likely 52°11° to 53°12°)	52°11°	0%	5 mph8 km/h from S, gusts 12 mph19 km/h	80%	62%	0
Sun 3a	Cloudy	51°11° (likely 51°11° to 53°12°)	51°11°	0%	0 mph0 km/h, gusts 12 mph19 km/h	83%	95%	0
Sun 4a	Cloudy	50°10° (likely 50°10° to 54°12°)	50°10°	0%	0 mph0 km/h, gusts 12 mph19 km/h	86%	95%	0
Sun 5a	Cloudy	49°9° (likely 49°9° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 12 mph20 km/h	86%	91%	0
Sun 6a	Cloudy	49°9° (likely 49°9° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 12 mph19 km/h	86%	92%	0
Sun 7a	Cloudy	48°9° (likely 48°9° to 53°12°)	48°9°	0%	0 mph0 km/h, gusts 11 mph18 km/h	86%	85%	0
Sun 8a	Cloudy	50°10° (likely 50°10° to 53°12°)	49°9°	0%	5 mph8 km/h from SSW, gusts 11 mph17 km/h	86%	77%	0
Sun 9a	Cloudy	55°13° (likely 55°13° to 56°13°)	55°13°	0%	5 mph8 km/h from SSW, gusts 10 mph17 km/h	76%	79%	1
Sun 10a	Cloudy	60°16° (likely 58°14° to 60°16°)	60°16°	0%	5 mph8 km/h from SSW, gusts 13 mph22 km/h	65%	79%	1
Sun 11a	Cloudy	65°18° (likely 62°17° to 65°18°)	65°18°	0%	5 mph8 km/h from SSW, gusts 13 mph21 km/h	57%	79%	2
Sun 12p	Cloudy	69°21° (likely 65°18° to 69°21°)	69°21°	0%	5 mph8 km/h from SSW, gusts 13 mph21 km/h	50%	79%	3
Sun 1p	Cloudy	71°22° (likely 67°19° to 71°22°)	71°22°	0%	10 mph16 km/h from SSW, gusts 13 mph20 km/h	48%	61%	3
Sun 2p	Cloudy	73°23° (likely 69°21° to 73°23°)	73°23°	0%	10 mph16 km/h from SSW, gusts 12 mph19 km/h	45%	63%	3
Sun 3p	Partly sunny	74°23° (likely 69°21° to 74°23°)	74°23°	0%	5 mph8 km/h from SSW, gusts 11 mph18 km/h	44%	59%	3
Sun 4p	Partly sunny	74°23° (likely 69°21° to 74°23°)	74°23°	0%	5 mph8 km/h from S, gusts 11 mph17 km/h	44%	32%	2
Sun 5p	Partly sunny	71°22° (likely 66°19° to 71°22°)	71°22°	0%	5 mph8 km/h from S, gusts 11 mph17 km/h	48%	64%	1
Sun 6p	Cloudy	67°19° (likely 62°17° to 67°19°)	67°19°	0%	5 mph8 km/h from S, gusts 8 mph14 km/h	54%	81%	0
Sun 7p	Cloudy	62°17° (likely 60°16° to 63°17°)	62°17°	0%	5 mph8 km/h from S, gusts 8 mph14 km/h	63%	81%	0
Sun 8p	Cloudy	59°15° (likely 58°14° to 61°16°)	59°15°	0%	5 mph8 km/h from S, gusts 8 mph14 km/h	68%	80%	0
Sun 9p	Partly cloudy	57°14° (likely 57°14° to 59°15°)	57°14°	0%	5 mph8 km/h from S, gusts 8 mph13 km/h	71%	72%	0
Sun 10p	Partly cloudy	56°13° (likely 56°13° to 58°14°)	56°13°	0%	5 mph8 km/h from S, gusts 8 mph13 km/h	75%	73%	0
Sun 11p	Partly cloudy	54°12° (likely 54°12° to 57°14°)	54°12°	0%	5 mph8 km/h from S, gusts 9 mph14 km/h	77%	70%	0
Mon 12a	Cloudy	53°12° (likely 53°12° to 57°14°)	53°12°	0%	5 mph8 km/h from SSW, gusts 9 mph15 km/h	79%	77%	0
Mon 1a	Partly cloudy	52°11° (likely 52°11° to 56°13°)	52°11°	0%	5 mph8 km/h from W, gusts 8 mph12 km/h	81%	70%	0
Mon 2a	Partly cloudy	51°11° (likely 51°11° to 54°12°)	51°11°	0%	5 mph8 km/h from N, gusts 10 mph17 km/h	85%	74%	0
Mon 3a	Mostly cloudy	50°10° (likely 50°10° to 53°12°)	49°9°	0%	5 mph8 km/h from N, gusts 12 mph19 km/h	90%	73%	0
Mon 4a	Cloudy	49°9° (likely 49°9° to 53°12°)	47°8°	0%	5 mph8 km/h from NNE, gusts 13 mph21 km/h	97%	69%	0
Mon 5a	Cloudy	48°9° (likely 48°9° to 53°12°)	46°8°	0%	5 mph8 km/h from NNE, gusts 13 mph21 km/h	100%	86%	0
Mon 6a	Cloudy	48°9° (likely 48°9° to 54°12°)	45°7°	0%	5 mph8 km/h from NNE, gusts 14 mph22 km/h	100%	94%	0
Mon 7a	Cloudy	48°9° (likely 48°9° to 54°12°)	45°7°	0%	5 mph8 km/h from NE, gusts 13 mph20 km/h	100%	98%	0
Mon 8a	Cloudy	49°9° (likely 49°9° to 54°12°)	46°8°	0%	5 mph8 km/h from NE, gusts 15 mph24 km/h	100%	97%	0
Mon 9a	Cloudy	52°11° (likely 52°11° to 56°13°)	52°11°	0%	10 mph16 km/h from NE, gusts 17 mph28 km/h	91%	88%	1
Mon 10a	Mostly cloudy	57°14° (likely 56°13° to 58°14°)	57°14°	0%	10 mph16 km/h from NE, gusts 17 mph27 km/h	79%	76%	1
Mon 11a	Partly sunny	60°16° (likely 58°14° to 60°16°)	61°16°	0%	10 mph16 km/h from NE, gusts 16 mph26 km/h	69%	83%	2
Mon 12p	Cloudy	63°17° (likely 59°15° to 63°17°)	63°17°	0%	10 mph16 km/h from NE, gusts 15 mph24 km/h	66%	86%	2
Mon 1p	Cloudy	64°18° (likely 60°16° to 64°18°)	64°18°	0%	10 mph16 km/h from ENE, gusts 14 mph23 km/h	65%	85%	3
Mon 2p	Cloudy	64°18° (likely 61°16° to 65°18°)	64°18°	0%	10 mph16 km/h from ENE, gusts 14 mph23 km/h	63%	81%	3
Mon 3p	Cloudy	63°17° (likely 60°16° to 64°18°)	63°17°	0%	10 mph16 km/h from ENE, gusts 14 mph23 km/h	62%	89%	2

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 72°22°, low 48°9°. Typical 57°14° / 39°4°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
2. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
3. Overnight
  midnight–6 AM
  Cloudy, 49°9°
  Dry
Official NWS forecast
Today: Partly sunny. High near 72, with temperatures falling to around 70 in the afternoon. South wind 5 to 10 mph.
Tonight: Partly cloudy, with a low around 48. South wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–72°22°
Low, likely
47°8°–49°9°
Typical high / low
57°14° / 39°4°
Wind
9 mph14 km/h, gusts 17 mph27 km/h
UV peak
4
Tomorrow, Oct 25. Partly sunny. High 74°23°, low 48°9°. Typical 56°13° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Mostly cloudy, 48°9°
  Dry
Official NWS forecast
Day: Mostly sunny. High near 74, with temperatures falling to around 71 in the afternoon. South southwest wind 0 to 10 mph.
Night: Partly cloudy, with a low around 48. Northwest wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–74°23°
Low, likely
48°9°–52°11°
Typical high / low
56°13° / 38°3°
Wind
9 mph14 km/h, gusts 17 mph28 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 64°18°, low 46°8°. Typical 56°13° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Official NWS forecast
Day: Partly sunny, with a high near 64. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Night: Mostly cloudy, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
46°8°–50°10°
Typical high / low
56°13° / 38°3°
Wind
12 mph20 km/h, gusts 20 mph32 km/h
UV peak
3
Tuesday, Oct 27. Cloudy. High 68°20°, low 53°12°. Typical 56°13° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 68.
Night: Mostly cloudy, with a low around 53.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
48°9°–53°12°
Typical high / low
56°13° / 38°3°
Wind
10 mph16 km/h, gusts 20 mph32 km/h
UV peak
2
Wednesday, Oct 28. Partly sunny. High 74°23°, low 55°13°. Typical 55°13° / 37°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 59°15°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 74.
Night: Partly cloudy, with a low around 55.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–74°23°
Low, likely
53°12°–56°13°
Typical high / low
55°13° / 37°3°
Wind
13 mph21 km/h, gusts 29 mph47 km/h
UV peak
3
Thursday, Oct 29. Showers. High 73°23°, low 54°12°. Typical 55°13° / 37°3°. Rain 0.2 in5.1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers after 7am. Mostly sunny, with a high near 73.
Night: A slight chance of rain showers before 7pm. Partly cloudy, with a low around 54.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–73°23°
Low, likely
51°11°–59°15°
Typical high / low
55°13° / 37°3°
Wind
14 mph23 km/h, gusts 32 mph51 km/h
UV peak
3
Friday, Oct 30. Mostly cloudy. High 73°23°, low 55°13°. Typical 54°12° / 37°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 59°15°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 73.
Night: A slight chance of rain showers after 1am. Mostly cloudy, with a low around 55.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–73°23°
Low, likely
48°9°–60°16°
Typical high / low
54°12° / 37°3°
Wind
17 mph28 km/h, gusts 31 mph50 km/h
UV peak
3
Saturday, Oct 31. Drizzle. High 68°20°, low 57°14°. Typical 54°12° / 36°2°. Rain 0.09 in2.3 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  40% chance
3. Evening
  6 PM–midnight
  Drizzle, 63°17°
  50% chance · 0.07 in1.8 mm
4. Overnight
  midnight–6 AM
  Drizzle, 58°15°
  50% chance · 0.15 in3.9 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–72°22°
Low, likely
52°11°–62°17°
Typical high / low
54°12° / 36°2°
Wind
16 mph26 km/h, gusts 27 mph44 km/h
UV peak
2
Sunday, Nov 1. Showers. High 64°18°, low 56°13°. Typical 53°12° / 36°2°. Rain 0.41 in10 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 60°15°
  40% chance · 0.08 in2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 63°17°
  40% chance · 0.07 in1.7 mm
3. Evening
  6 PM–midnight
  Showers, 60°16°
  30% chance · 0.15 in3.7 mm
4. Overnight
  midnight–6 AM
  Drizzle, 48°9°
  30% chance · 0.03 in0.6 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
55°13°–58°14°
Typical high / low
53°12° / 36°2°
Wind
21 mph33 km/h, gusts 37 mph59 km/h
Monday, Nov 2. Drizzle. High 60°16°, low 48°9°. Typical 53°12° / 36°2°. Rain 0.63 in16 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°9°
  30% chance · 0.15 in3.8 mm
2. Afternoon
  noon–6 PM
  Drizzle, 54°12°
  30% chance · 0.35 in9 mm
3. Evening
  6 PM–midnight
  Drizzle, 52°11°
  30% chance · 0.13 in3.3 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
54°12°–66°19°
Low, likely
37°3°–59°15°
Typical high / low
53°12° / 36°2°
Wind
18 mph29 km/h, gusts 40 mph64 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 72°, low 48°.
Tomorrow
Dry, high 74°, low 48°.
Monday
Dry, high 64°, low 46°, cooling off.
Rest of week
Highs 60–74°; chance of precipitation on Saturday, Sunday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (LOT) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Fox River at Algonquin

5.1 mi

Below flood stage

Level: 1.8 ft
Flow: 1,020 cfs

Reading from Sat 3:45 PM · NWS gauge page

Fox River at Algonquin tailwater

5.3 mi

Below flood stage

Level: 5.8 ft
Flow: 875 cfs

Reading from Sat 3:30 PM · NWS gauge page

Boone Creek near Mchenry

6.1 mi

Below flood stage

Level: 1.1 ft
Flow: 13 cfs

Reading from Sat 3:45 PM · NWS gauge page

Fox River at McHenry (Stratton Lock and Dam) tailwater

6.7 mi

Below flood stage

Level: 1.4 ft
Flow: 790 cfs

Reading from Sat 3:15 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 87% less heating than a typical week.

This week 16Typical 129

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 48°F).

Open the windows?

Today, 5:00 PM–7:00 PM

Good stretch to open the windows.

Is this typical?

BARRINGTON 3SW · official normals 1991–2020 · records 1962–2026

Oct 24, today vs a typical year

Today’s expected high is 15°8° warmer than typical.

Last 7 days vs normal

On average 4°2° warmer than normal (daily mean temperature).

−4°−2°SunOct 18
+1°MonOct 19
+4°+2°TueOct 20
+4°+2°WedOct 21
+8°+4°ThuOct 22
+10°+5°FriOct 23
+9°+5°SatOct 24

Crystal Lake weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 41 min; Losing 2 min 44 s a day; shortest Dec 21, 1 h 35 min less
Golden hour: 5:18–6:15 PM; Morning 6:59–7:55 AM
Blue hour: 6:15–6:26 PM; Morning 6:48–6:59 AM; first light 6:48 AM

Stars tonight? Fair

Mostly clear 9–11 PM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:29 AM · rises 4:55 PM
Full moon: Oct 25
New moon: Nov 9

Looking west from Crystal Lake. A level horizon.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Crystal Lake, IL weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Fox River at Algonquin

Fox River at Algonquin tailwater

Boone Creek near Mchenry

Fox River at McHenry (Stratton Lock and Dam) tailwater

For your home

Heating this week

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon