Observed 2:15 PM CDT at KSAR

Prairie du Rocher, IL weather

Sunny and 75°24°, 10°6° warmer than a typical Oct 24.

Mostly agree

Now 75°24°

Sunny

Wind: 3 mph5 km/h; From the southeast. Up to 6 mph10 km/h through 3 AM
Dew point: 41°5°; Comfortable
UV index: 3Moderate; Moderate until 4 PM · peak 5
Air quality: 46Good; Main pollutant: Ozone
Pressure: 30.34 inHg1027 hPa; Falling · −0.06 inHg−1.9 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 9 PM
Low 48°9° tomorrow at 6 AM
Above 60°16° tomorrow by 10 AM

This afternoonNear 75°24° · Partly cloudy
TonightDown to 49°9° by 4 AM · Partly cloudy
Tomorrow morningUp to 68°20° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 78°26° by 3 PM · Mostly cloudy
Tomorrow nightDown to 52°11° by 5 AM · Cloudy
Monday morningUp to 67°19° by 11 AM · Cloudy
Monday afternoonUp to 77°25° by 2 PM · Mostly 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 3p	Partly sunny	75°24° (likely 72°22° to 77°25°)	75°24°	0%	6 mph10 km/h from E, gusts 7 mph11 km/h	33%	64%	3
Sat 4p	Partly sunny	75°24° (likely 72°22° to 77°25°)	75°24°	0%	6 mph10 km/h from E, gusts 7 mph12 km/h	33%	79%	1
Sat 5p	Sunny	75°24° (likely 69°21° to 75°24°)	75°24°	0%	3 mph5 km/h from E, gusts 7 mph12 km/h	33%	19%	1
Sat 6p	Mostly clear	70°21° (likely 65°18° to 70°21°)	70°21°	0%	3 mph5 km/h from E, gusts 7 mph11 km/h	41%	16%	0
Sat 7p	Clear	64°18° (likely 62°17° to 66°19°)	64°18°	0%	3 mph5 km/h from E, gusts 7 mph11 km/h	50%	3%	0
Sat 8p	Partly cloudy	61°16° (likely 59°15° to 64°18°)	61°16°	0%	2 mph3 km/h from E, gusts 7 mph11 km/h	58%	42%	0
Sat 9p	Partly cloudy	58°14° (likely 57°14° to 62°17°)	58°14°	0%	2 mph3 km/h from SE, gusts 6 mph9 km/h	62%	49%	0
Sat 10p	Partly cloudy	56°13° (likely 55°13° to 60°16°)	56°13°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	69%	53%	0
Sat 11p	Partly cloudy	54°12° (likely 54°12° to 59°15°)	54°12°	0%	1 mph2 km/h from SE, gusts 5 mph7 km/h	74%	37%	0
Sun 12a	Partly cloudy	53°12° (likely 52°11° to 57°14°)	53°12°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	77%	42%	0
Sun 1a	Partly cloudy	52°11° (likely 51°11° to 56°13°)	52°11°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	80%	47%	0
Sun 2a	Partly cloudy	51°11° (likely 50°10° to 55°13°)	51°11°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	83%	34%	0
Sun 3a	Clear	50°10° (likely 49°9° to 55°13°)	50°10°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	86%	41%	0
Sun 4a	Partly cloudy	49°9° (likely 48°9° to 54°12°)	49°9°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	89%	47%	0
Sun 5a	Partly cloudy	49°9° (likely 46°8° to 53°12°)	49°9°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	86%	55%	0
Sun 6a	Partly cloudy	48°9° (likely 45°7° to 52°11°)	48°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	74%	0
Sun 7a	Cloudy	48°9° (likely 44°7° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	78%	0
Sun 8a	Cloudy	49°9° (likely 44°7° to 52°11°)	49°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	76%	0
Sun 9a	Cloudy	55°13° (likely 51°11° to 57°14°)	55°13°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	80%	79%	1
Sun 10a	Cloudy	62°17° (likely 60°16° to 65°18°)	62°17°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	67%	80%	2
Sun 11a	Cloudy	68°20° (likely 66°19° to 72°22°)	68°20°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	53%	80%	3
Sun 12p	Cloudy	73°23° (likely 70°21° to 77°25°)	73°23°	0%	3 mph5 km/h from S, gusts 6 mph10 km/h	44%	88%	4
Sun 1p	Cloudy	76°24° (likely 73°23° to 79°26°)	76°24°	0%	3 mph5 km/h from S, gusts 4 mph6 km/h	39%	83%	4
Sun 2p	Cloudy	77°25° (likely 75°24° to 80°27°)	77°25°	0%	3 mph5 km/h from SE, gusts 4 mph7 km/h	36%	80%	4
Sun 3p	Cloudy	78°26° (likely 75°24° to 80°27°)	78°26°	0%	3 mph5 km/h from SE, gusts 5 mph9 km/h	35%	82%	3
Sun 4p	Cloudy	78°26° (likely 75°24° to 80°27°)	78°26°	0%	3 mph5 km/h from SE, gusts 6 mph9 km/h	35%	85%	2
Sun 5p	Cloudy	77°25° (likely 72°22° to 79°26°)	77°25°	0%	2 mph3 km/h from SE, gusts 6 mph10 km/h	36%	85%	1
Sun 6p	Cloudy	73°23° (likely 67°19° to 74°23°)	73°23°	0%	2 mph3 km/h from E, gusts 6 mph10 km/h	43%	88%	0
Sun 7p	Cloudy	67°19° (likely 64°18° to 69°21°)	67°19°	0%	3 mph5 km/h from SE, gusts 9 mph15 km/h	52%	89%	0
Sun 8p	Cloudy	63°17° (likely 61°16° to 66°19°)	63°17°	0%	2 mph3 km/h from SE, gusts 8 mph13 km/h	60%	90%	0
Sun 9p	Cloudy	60°16° (likely 59°15° to 64°18°)	60°16°	0%	2 mph3 km/h from SE, gusts 6 mph10 km/h	67%	89%	0
Sun 10p	Cloudy	58°14° (likely 58°14° to 62°17°)	58°14°	0%	1 mph2 km/h from S, gusts 5 mph7 km/h	72%	89%	0
Sun 11p	Cloudy	57°14° (likely 57°14° to 61°16°)	57°14°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	72%	89%	0
Mon 12a	Cloudy	56°13° (likely 56°13° to 59°15°)	56°13°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	74%	90%	0
Mon 1a	Cloudy	55°13° (likely 55°13° to 58°14°)	55°13°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	77%	91%	0
Mon 2a	Cloudy	54°12° (likely 54°12° to 57°14°)	54°12°	0%	1 mph2 km/h from S, gusts 3 mph6 km/h	80%	91%	0
Mon 3a	Cloudy	53°12° (likely 53°12° to 56°13°)	53°12°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	80%	90%	0
Mon 4a	Cloudy	53°12° (likely 53°12° to 55°13°)	53°12°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	80%	93%	0
Mon 5a	Cloudy	52°11° (likely 52°11° to 55°13°)	52°11°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	83%	95%	0
Mon 6a	Cloudy	52°11° (likely 52°11° to 54°12°)	52°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	83%	95%	0
Mon 7a	Cloudy	51°11° (likely 51°11° to 55°13°)	51°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	86%	96%	0
Mon 8a	Cloudy	52°11° (likely 52°11° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 4 mph7 km/h	86%	94%	0
Mon 9a	Cloudy	56°13° (likely 56°13° to 59°15°)	56°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	80%	90%	1
Mon 10a	Cloudy	62°17° (likely 62°17° to 67°19°)	62°17°	0%	1 mph2 km/h from SW, gusts 7 mph12 km/h	70%	82%	2
Mon 11a	Cloudy	67°19° (likely 67°19° to 73°23°)	67°19°	0%	1 mph2 km/h from SW, gusts 9 mph15 km/h	59%	77%	3
Mon 12p	Cloudy	71°22° (likely 71°22° to 76°24°)	71°22°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	49%	69%	3
Mon 1p	Cloudy	75°24° (likely 73°23° to 78°26°)	75°24°	0%	2 mph3 km/h from SW, gusts 8 mph12 km/h	41%	77%	4
Mon 2p	Cloudy	77°25° (likely 72°22° to 79°26°)	77°25°	0%	2 mph3 km/h from S, gusts 7 mph11 km/h	37%	73%	4

Days ahead

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

Today, Oct 24. Partly sunny. High 76°24°, low 48°9°. Typical 66°19° / 43°6°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Partly sunny, 75°24°
  Dry
2. Evening
  6 PM–midnight
  Partly cloudy, 61°16°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 76. East wind around 6 mph.
Tonight: Partly cloudy, with a low around 48. Southeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–77°25°
Low, likely
45°7°–48°9°
Typical high / low
66°19° / 43°6°
Wind
7 mph11 km/h
UV peak
5
Tomorrow, Oct 25. Cloudy. High 78°26°, low 50°10°. Typical 66°19° / 43°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 78°26°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 78. Southeast wind 0 to 3 mph.
Night: Mostly cloudy, with a low around 50. Southeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
75°24°–80°27°
Low, likely
44°7°–51°11°
Typical high / low
66°19° / 43°6°
Wind
7 mph11 km/h, gusts 14 mph22 km/h
UV peak
4
Monday, Oct 26. Cloudy. High 78°26°, low 50°10°. Typical 65°18° / 43°6°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 53°12°
  Dry
Official NWS forecast
Day: Partly sunny. High near 78, with temperatures falling to around 73 in the afternoon. South wind around 2 mph.
Night: Partly cloudy, with a low around 50.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
73°23°–79°26°
Low, likely
50°10°–54°12°
Typical high / low
65°18° / 43°6°
Wind
6 mph10 km/h, gusts 11 mph18 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 76°24°, low 50°10°. Typical 65°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 76.
Night: Mostly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
71°22°–76°24°
Low, likely
48°9°–56°13°
Typical high / low
65°18° / 42°6°
Wind
9 mph14 km/h, gusts 15 mph25 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 80°27°, low 52°11°. Typical 64°18° / 42°6°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 79°26°
  Dry
3. Evening
  6 PM–midnight
  Clear, 64°18°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 80.
Night: Mostly clear, with a low around 52.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
74°23°–80°27°
Low, likely
47°8°–55°13°
Typical high / low
64°18° / 42°6°
Wind
11 mph17 km/h, gusts 20 mph31 km/h
UV peak
4
Thursday, Oct 29. Mostly sunny. High 82°28°, low 53°12°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 81°27°
  Dry
3. Evening
  6 PM–midnight
  Clear, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 82.
Night: Mostly clear, with a low around 53.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
78°26°–83°28°
Low, likely
50°10°–57°14°
Typical high / low
64°18° / 42°6°
Wind
10 mph16 km/h, gusts 26 mph41 km/h
UV peak
4
Friday, Oct 30. Cloudy. High 80°27°, low 55°13°. Typical 63°17° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 79°26°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 65°18°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 57°14°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 80.
Night: Mostly cloudy, with a low around 55.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
74°23°–82°28°
Low, likely
51°11°–57°14°
Typical high / low
63°17° / 41°5°
Wind
10 mph16 km/h, gusts 19 mph30 km/h
UV peak
4
Saturday, Oct 31. Drizzle. High 75°24°, low 61°16°. Typical 63°17° / 41°5°. Rain 0.14 in3.6 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 60°16°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 76°25°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 69°21°
  30% chance · 0.04 in1 mm
4. Overnight
  midnight–6 AM
  Drizzle, 65°18°
  40% chance · 0.12 in3 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
70°21°–77°25°
Low, likely
57°14°–65°18°
Typical high / low
63°17° / 41°5°
Wind
16 mph26 km/h, gusts 22 mph36 km/h
UV peak
2
Sunday, Nov 1. Showers. High 76°24°, low 62°17°. Typical 62°17° / 41°5°. Rain 0.45 in11 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 67°19°
  40% chance · 0.05 in1.3 mm
2. Afternoon
  noon–6 PM
  Showers, 78°26°
  30% chance · 0.05 in1.3 mm
3. Evening
  6 PM–midnight
  Showers, 69°20°
  30% chance · 0.18 in4.6 mm
4. Overnight
  midnight–6 AM
  Drizzle, 54°12°
  40% chance · 0.07 in1.7 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
71°22°–83°28°
Low, likely
59°15°–65°18°
Typical high / low
62°17° / 41°5°
Wind
15 mph24 km/h, gusts 39 mph63 km/h
UV peak
3
Monday, Nov 2. Drizzle. High 65°18°, low 52°11°. Typical 62°17° / 40°4°. Rain 0.24 in6.1 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 55°13°
  40% chance · 0.05 in1.3 mm
2. Afternoon
  noon–6 PM
  Drizzle, 59°15°
  40% chance · 0.03 in0.8 mm
3. Evening
  6 PM–midnight
  Drizzle, 56°13°
  30% chance
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
56°13°–76°24°
Low, likely
42°6°–66°19°
Typical high / low
62°17° / 40°4°
Wind
21 mph34 km/h, gusts 42 mph67 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 76°, low 48°.
Tomorrow
Dry, high 78°, low 50°.
Monday
Dry, high 78°, low 50°.
Rest of week
Highs 65–82°; chance of precipitation on Sunday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (LSX) (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

Mississippi River at Chester

19 mi

Below flood stage

Level: 11.5 ft
Flow: 178,000 cfs

Forecast peak 11.0 ft Sat 7 PM

Reading from Sat 2 PM · NWS gauge page

Mississippi River at Herculaneum

20 mi

Below flood stage

Level: 5.9 ft

Reading from Sat 1:30 PM · NWS gauge page

Kaskaskia River at New Athens

20 mi

Below flood stage

Level: 68.6 ft
Flow: 583 cfs

Reading from Sat 1 PM · NWS gauge page

For your home

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

Heating this week

About 83% less heating than a typical week.

This week 13Typical 81

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 41°F).

Open the windows?

Today, 4:00 PM–8:00 PM

Good stretch to open the windows.

Is this typical?

Kaskaskia River Navigation Lock · official normals 1991–2020 · records 1974–2026

Oct 24, today vs a typical year

Today’s expected high is 10°6° warmer than typical.

Last 7 days vs normal

On average 1°0° warmer than normal (daily mean temperature).

−7°−4°SunOct 18
−4°−2°MonOct 19
±0°TueOct 20
+3°+1°WedOct 21
+4°+2°ThuOct 22
+6°+3°FriOct 23
+6°+3°SatOct 24

Prairie du Rocher weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 52 min; Losing 2 min 16 s a day; shortest Dec 21, 1 h 21 min less
Golden hour: 5:34–6:27 PM; Morning 7:01–7:54 AM
Blue hour: 6:27–6:37 PM; Morning 6:51–7:01 AM; first light 6:51 AM

Stars tonight? Fair

Mostly clear 6:37–8 PM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:33 AM · rises 5:07 PM
Full moon: Oct 25
New moon: Nov 9

Looking southwest from Prairie du Rocher. The highest point on the skyline is about 2,100 ft, 12 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Prairie du Rocher, IL weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Mississippi River at Chester

Mississippi River at Herculaneum

Kaskaskia River at New Athens

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