Observed 6:55 AM CDT at KSTL

Cahokia Heights, IL weather

Clear and 52°11°, 11°6° warmer than a typical Oct 23.

Forecasts agree

Now 52°11°

Clear

Wind: 6 mph9 km/h; From the east-southeast. Up to 6 mph10 km/h through 7 PM
Dew point: 48°9°; Comfortable
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air quality: 74Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.27 inHg1025 hPa; Rising slowly · +0.02 inHg+0.8 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (45°7° then, 46°8° now)

Good hours for

Above 60°16° today by 10 AM
High 77°25° today at 4 PM
Fog tonight 2–3 AM
Fog tonight 4–6 AM

This morningUp to 67°19° by 11 AM · Clear
This afternoonUp to 77°25° by 4 PM · Clear
TonightDown to 49°9° by 5 AM · Partly cloudy
Tomorrow morningUp to 68°20° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 76°24° by 3 PM · Mostly cloudy
Tomorrow nightDown to 48°9° by 5 AM · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 7a	Sunny	45°7° (likely 45°7° to 51°11°)	45°7°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	12%	0
Fri 8a	Sunny	49°9° (likely 46°8° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	93%	5%	0
Fri 9a	Sunny	53°12° (likely 53°12° to 58°14°)	53°12°	0%	1 mph2 km/h from SE, gusts 6 mph10 km/h	86%	2%	1
Fri 10a	Sunny	62°17° (likely 61°16° to 63°17°)	62°17°	0%	0 mph0 km/h, gusts 9 mph14 km/h	65%	0%	2
Fri 11a	Sunny	67°19° (likely 66°19° to 67°19°)	67°19°	0%	5 mph8 km/h from SE, gusts 10 mph17 km/h	52%	0%	3
Fri 12p	Sunny	71°22° (likely 69°21° to 71°22°)	71°22°	0%	5 mph8 km/h from SE, gusts 10 mph15 km/h	44%	0%	4
Fri 1p	Sunny	74°23° (likely 72°22° to 74°23°)	74°23°	0%	6 mph10 km/h from SE, gusts 11 mph18 km/h	37%	0%	4
Fri 2p	Sunny	75°24° (likely 73°23° to 75°24°)	75°24°	0%	6 mph10 km/h from SE, gusts 10 mph17 km/h	37%	0%	4
Fri 3p	Sunny	76°24° (likely 74°23° to 76°24°)	76°24°	0%	5 mph8 km/h from SE, gusts 9 mph15 km/h	34%	0%	3
Fri 4p	Sunny	77°25° (likely 73°23° to 77°25°)	77°25°	0%	5 mph8 km/h from SE, gusts 9 mph14 km/h	33%	0%	2
Fri 5p	Sunny	75°24° (likely 71°22° to 75°24°)	75°24°	0%	5 mph8 km/h from SE, gusts 10 mph17 km/h	37%	0%	1
Fri 6p	Clear	72°22° (likely 67°19° to 72°22°)	72°22°	0%	5 mph8 km/h from SE, gusts 9 mph14 km/h	41%	0%	0
Fri 7p	Clear	68°20° (likely 64°18° to 68°20°)	68°20°	0%	5 mph8 km/h from E, gusts 9 mph14 km/h	49%	0%	0
Fri 8p	Clear	62°17° (likely 61°16° to 63°17°)	62°17°	0%	5 mph8 km/h from SE, gusts 10 mph16 km/h	62%	5%	0
Fri 9p	Clear	60°16° (likely 59°15° to 62°17°)	60°16°	0%	5 mph8 km/h from SE, gusts 12 mph19 km/h	64%	12%	0
Fri 10p	Clear	58°14° (likely 58°14° to 61°16°)	58°14°	0%	5 mph8 km/h from SE, gusts 12 mph20 km/h	69%	17%	0
Fri 11p	Clear	57°14° (likely 57°14° to 60°16°)	57°14°	0%	3 mph5 km/h from SE, gusts 11 mph18 km/h	72%	24%	0
Sat 12a	Clear	56°13° (likely 55°13° to 58°14°)	56°13°	0%	3 mph5 km/h from SE, gusts 11 mph17 km/h	72%	35%	0
Sat 1a	Cloudy	54°12° (likely 54°12° to 57°14°)	54°12°	0%	2 mph3 km/h from SE, gusts 9 mph15 km/h	77%	68%	0
Sat 2a	Fog	52°11° (likely 52°11° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 8 mph13 km/h	80%	62%	0
Sat 3a	Cloudy	52°11° (likely 51°11° to 55°13°)	52°11°	0%	0 mph0 km/h, gusts 6 mph10 km/h	80%	68%	0
Sat 4a	Fog	50°10° (likely 49°9° to 54°12°)	50°10°	0%	0 mph0 km/h, gusts 6 mph10 km/h	86%	58%	0
Sat 5a	Fog	49°9° (likely 48°9° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 5 mph8 km/h	86%	52%	0
Sat 6a	Cloudy	48°9° (likely 47°8° to 52°11°)	48°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	69%	0
Sat 7a	Cloudy	47°8° (likely 47°8° to 52°11°)	47°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	78%	0
Sat 8a	Cloudy	49°9° (likely 47°8° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	89%	80%	0
Sat 9a	Partly sunny	54°12° (likely 52°11° to 57°14°)	54°12°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	80%	75%	1
Sat 10a	Partly sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	3 mph5 km/h from SE, gusts 8 mph13 km/h	60%	72%	2
Sat 11a	Cloudy	68°20° (likely 65°18° to 68°20°)	68°20°	0%	5 mph8 km/h from SE, gusts 9 mph14 km/h	49%	80%	3
Sat 12p	Cloudy	71°22° (likely 68°20° to 71°22°)	71°22°	0%	5 mph8 km/h from SE, gusts 8 mph13 km/h	42%	78%	4
Sat 1p	Cloudy	74°23° (likely 72°22° to 75°24°)	74°23°	0%	5 mph8 km/h from SE, gusts 8 mph12 km/h	35%	79%	4
Sat 2p	Partly sunny	75°24° (likely 73°23° to 76°24°)	75°24°	0%	5 mph8 km/h from SE, gusts 7 mph12 km/h	33%	75%	4
Sat 3p	Partly sunny	76°24° (likely 74°23° to 76°24°)	76°24°	0%	5 mph8 km/h from SE, gusts 7 mph12 km/h	32%	70%	3
Sat 4p	Partly sunny	76°24° (likely 74°23° to 76°24°)	76°24°	0%	5 mph8 km/h from SE, gusts 8 mph13 km/h	31%	59%	2
Sat 5p	Partly sunny	75°24° (likely 72°22° to 75°24°)	75°24°	0%	3 mph5 km/h from SE, gusts 8 mph13 km/h	34%	43%	1
Sat 6p	Clear	72°22° (likely 67°19° to 72°22°)	72°22°	0%	3 mph5 km/h from SE, gusts 7 mph11 km/h	38%	43%	0
Sat 7p	Clear	67°19° (likely 64°18° to 67°19°)	67°19°	0%	5 mph8 km/h from SE, gusts 6 mph10 km/h	49%	43%	0
Sat 8p	Clear	61°16° (likely 61°16° to 62°17°)	61°16°	0%	3 mph5 km/h from SE, gusts 7 mph11 km/h	62%	45%	0
Sat 9p	Mostly clear	58°14° (likely 58°14° to 60°16°)	58°14°	0%	1 mph2 km/h from SE, gusts 9 mph14 km/h	69%	53%	0
Sat 10p	Mostly clear	58°14° (likely 57°14° to 59°15°)	58°14°	0%	0 mph0 km/h, gusts 9 mph15 km/h	69%	60%	0
Sat 11p	Mostly clear	57°14° (likely 56°13° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 7 mph11 km/h	72%	59%	0
Sun 12a	Mostly clear	55°13° (likely 54°12° to 59°15°)	55°13°	0%	0 mph0 km/h, gusts 7 mph12 km/h	74%	64%	0
Sun 1a	Mostly clear	54°12° (likely 53°12° to 59°15°)	54°12°	0%	0 mph0 km/h, gusts 7 mph11 km/h	77%	68%	0
Sun 2a	Partly cloudy	53°12° (likely 51°11° to 63°17°)	53°12°	0%	0 mph0 km/h, gusts 4 mph7 km/h	77%	51%	0
Sun 3a	Partly cloudy	51°11° (likely 50°10° to 62°17°)	51°11°	0%	0 mph0 km/h, gusts 4 mph7 km/h	83%	42%	0
Sun 4a	Partly cloudy	50°10° (likely 48°9° to 62°17°)	50°10°	0%	0 mph0 km/h, gusts 4 mph6 km/h	83%	45%	0
Sun 5a	Partly cloudy	48°9° (likely 47°8° to 61°16°)	48°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	86%	42%	0
Sun 6a	Partly cloudy	46°8° (likely 46°8° to 60°16°)	46°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	93%	43%	0

Days ahead

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

Today, Oct 23. Fog. High 77°25°, low 46°8°. Typical 66°19° / 44°7°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°9°
  Dry
Official NWS forecast
Today: Patchy fog before 9am. Sunny, with a high near 77. Southeast wind 0 to 6 mph.
Tonight: Patchy fog after 2am. Mostly clear, with a low around 46. Southeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
74°23°–77°25°
Low, likely
46°8°–51°11°
Typical high / low
66°19° / 44°7°
Wind
8 mph12 km/h, gusts 18 mph28 km/h
UV peak
5
Tomorrow, Oct 24. Cloudy. High 76°24°, low 46°8°. Typical 66°19° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Partly sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 48°9°
  Dry
Official NWS forecast
Day: Patchy fog before 7am. Mostly sunny, with a high near 76. Southeast wind 0 to 5 mph.
Night: Partly cloudy, with a low around 46. Southeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
74°23°–76°24°
Low, likely
46°8°–51°11°
Typical high / low
66°19° / 43°6°
Wind
7 mph10 km/h, gusts 15 mph24 km/h
UV peak
4
Sunday, Oct 25. Partly sunny. High 78°26°, low 48°9°. Typical 66°19° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 78°26°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°14°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 78. Southeast wind around 1 mph.
Night: Mostly cloudy, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
77°25°–79°26°
Low, likely
45°7°–57°14°
Typical high / low
66°19° / 43°6°
Wind
5 mph8 km/h
UV peak
4
Monday, Oct 26. Mostly cloudy. High 77°25°, low 48°9°. Typical 65°18° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 76°25°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 65°18°
  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 77.
Night: Mostly cloudy, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
76°24°–77°25°
Low, likely
48°9°–60°16°
Typical high / low
65°18° / 42°6°
Wind
6 mph9 km/h, gusts 15 mph24 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 76°24°, low 48°9°. Typical 65°18° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 74°23°
  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: Partly sunny, with a high near 76.
Night: Mostly cloudy, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
73°23°–76°24°
Low, likely
48°9°–59°15°
Typical high / low
65°18° / 42°6°
Wind
7 mph10 km/h, gusts 21 mph33 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 77°25°, low 49°9°. Typical 64°18° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly sunny, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 67°19°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 58°15°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 77.
Night: Mostly clear, with a low around 49.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
76°24°–78°26°
Low, likely
49°9°–61°16°
Typical high / low
64°18° / 42°6°
Wind
10 mph16 km/h, gusts 27 mph43 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 77°25°, low 47°8°. Typical 64°18° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 57°14°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 77.
Night: Partly cloudy, with a low around 47.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
71°22°–79°26°
Low, likely
47°8°–61°16°
Typical high / low
64°18° / 41°5°
Wind
9 mph15 km/h, gusts 26 mph42 km/h
UV peak
3
Friday, Oct 30. Drizzle. High 69°21°, low 53°12°. Typical 63°17° / 41°5°. Rain 0.02 in0.5 mm, 10% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 51°11°
  Dry
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°–74°23°
Low, likely
45°7°–59°15°
Typical high / low
63°17° / 41°5°
Wind
8 mph13 km/h, gusts 15 mph25 km/h
UV peak
2
Saturday, Oct 31. Cloudy. High 67°19°, low 53°12°. Typical 63°17° / 41°5°. Rain 0.16 in4.1 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 53°12°
  30% chance · 0.03 in0.7 mm
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 62°17°
  30% chance
4. Overnight
  midnight–6 AM
  Cloudy, 58°14°
  30% chance · 0.02 in0.4 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
60°16°–70°21°
Low, likely
47°8°–59°15°
Typical high / low
63°17° / 41°5°
Wind
11 mph18 km/h, gusts 23 mph36 km/h
UV peak
1
Sunday, Nov 1. Cloudy. High 70°21°, low 57°14°. Typical 62°17° / 40°4°. Rain 0.18 in4.6 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 58°15°
  30% chance
2. Afternoon
  noon–6 PM
  Partly sunny, 70°21°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 65°18°
  20% 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–73°23°
Low, likely
55°13°–60°16°
Typical high / low
62°17° / 40°4°
Wind
10 mph17 km/h, gusts 24 mph39 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 77°, low 46°.
Tomorrow
Dry, high 76°, low 46°.
Sunday
Dry, high 78°, low 48°.
Rest of week
Mostly dry, highs 67–77°.

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 St. Louis

4.1 mi

Below flood stage

Level: 8.7 ft
Flow: 178,000 cfs

Forecast peak 8.6 ft Fri 7 AM

Reading from Fri 5:30 AM · NWS gauge page

Mississippi River at Mel Price (Alton) Lock and Dam

20 mi

Below flood stage

Level: 8.0 ft
Flow: 128,000 cfs

Forecast peak 7.8 ft Fri 7 AM

Reading from Fri 5:30 AM · NWS gauge page

Missouri River at St. Charles

23 mi

Below flood stage

Level: 12.6 ft
Flow: 66,800 cfs

Forecast peak 12.6 ft Fri 7 AM

Reading from Fri 5:30 AM · NWS gauge page

Meramec River at Arnold

14 mi

Below flood stage

Level: 5.9 ft
Flow: 7,490 cfs

Reading from Fri 5:30 AM · 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 79

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 2
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at.

Comfort

Dry air outside (dew point 48°F).

Open the windows?

Today, 10:00 AM–9:00 PM

Good stretch to open the windows.

Is this typical?

Cahokia St. Louis Downtown Airport · official normals 1991–2020 · records 1997–2026

Oct 23, today vs a typical year

Today’s expected high is 11°6° warmer than typical.

Last 7 days vs normal

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

−9°−5°SatOct 17
−6°−3°SunOct 18
−2°−1°MonOct 19
+3°+2°TueOct 20
+4°+2°WedOct 21
+5°+3°ThuOct 22
—FriOct 23

Cahokia Heights weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 53 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 25 min less
Golden hour: 5:34–6:28 PM; Morning 7:01–7:54 AM
Blue hour: 6:28–6:38 PM; Morning 6:50–7:01 AM; first light 6:50 AM

Stars tonight? Fair

Mostly clear 6:38 PM–12 AM, but the moon is 95% lit and up.

Moon

Waxing gibbous

91% lit · growing

Today: sets 4:26 AM · rises 4:41 PM
Full moon: Oct 25
New moon: Nov 9

Looking northwest from Cahokia Heights. The highest point on the skyline is about 2,500 ft, 19 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Cahokia Heights, IL weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Mississippi River at St. Louis

Mississippi River at Mel Price (Alton) Lock and Dam

Missouri River at St. Charles

Meramec River at Arnold

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 23, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon