Mississippi River at St. Louis
8.1 mi- Level
- 7.7 ft
- Flow
- 168,000 cfs
Forecast peak 8.0 ft Sat 7 PM
Reading from Sat 3 PM · NWS gauge page
Observed 3:35 PM CDT at KCPS
Dupo, IL weather
Sunny and 75°24°, 10°6° warmer than a typical Oct 24.
Today: low 49°9° (likely 46°8° to 49°9°), high 76°24° (likely 73°23° to 76°24°).
Now 75°24°
Sunny
- Wind
- 7 mph11 km/h
- From the east. Up to 7 mph11 km/h through 3 AM
- Dew point
- 45°7°
- Comfortable
- UV index
- 3Moderate
- Moderate until 4 PM · peak 4
- Air quality
- 61Moderate
- Main pollutant: Ozone
- Pressure
- 30.31 inHg1026 hPa
- Falling slowly · −0.04 inHg−1.4 hPa in 3 h
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
About the same as this time yesterday (75°24° then, 75°24° now)
Good hours for
This afternoonNear 75°24° · Partly cloudy
TonightDown to 50°10° by 5 AM · Clear
Tomorrow morningUp to 69°21° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 78°26° by 3 PM · Mostly cloudy
Tomorrow nightDown to 53°12° by 3 AM · Mostly cloudy
Monday morningUp to 70°21° by 11 AM · Cloudy
Monday afternoonUp to 77°25° by 2 PM · Mostly cloudy
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 3p | Cloudy | 75°24° (likely 73°23° to 76°24°) | 75°24° | 0% | 6 mph10 km/h from SE, gusts 7 mph11 km/h | 36% | 68% | 3 |
| Sat 4p | Partly sunny | 76°24° (likely 72°22° to 76°24°) | 76°24° | 0% | 6 mph10 km/h from SE, gusts 8 mph13 km/h | 33% | 29% | 2 |
| Sat 5p | Sunny | 75°24° (likely 70°21° to 75°24°) | 75°24° | 0% | 5 mph8 km/h from SE, gusts 9 mph14 km/h | 34% | 1% | 1 |
| Sat 6p | Clear | 70°21° (likely 65°18° to 70°21°) | 70°21° | 0% | 5 mph8 km/h from SE, gusts 8 mph13 km/h | 44% | 20% | 0 |
| Sat 7p | Clear | 65°18° (likely 62°17° to 66°19°) | 65°18° | 0% | 3 mph5 km/h from SE, gusts 6 mph10 km/h | 52% | 1% | 0 |
| Sat 8p | Clear | 60°16° (likely 60°16° to 63°17°) | 60°16° | 0% | 3 mph5 km/h from SE, gusts 7 mph11 km/h | 62% | 9% | 0 |
| Sat 9p | Mostly clear | 59°15° (likely 58°14° to 61°16°) | 59°15° | 0% | 2 mph3 km/h from SE, gusts 7 mph12 km/h | 64% | 17% | 0 |
| Sat 10p | Partly cloudy | 57°14° (likely 57°14° to 60°16°) | 57°14° | 0% | 2 mph3 km/h from SE, gusts 10 mph16 km/h | 72% | 19% | 0 |
| Sat 11p | Clear | 56°13° (likely 56°13° to 58°14°) | 56°13° | 0% | 2 mph3 km/h from SE, gusts 8 mph13 km/h | 72% | 3% | 0 |
| Sun 12a | Clear | 55°13° (likely 54°12° to 56°13°) | 55°13° | 0% | 2 mph3 km/h from SE, gusts 6 mph10 km/h | 74% | 2% | 0 |
| Sun 1a | Clear | 54°12° (likely 52°11° to 55°13°) | 54°12° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 77% | 4% | 0 |
| Sun 2a | Clear | 52°11° (likely 51°11° to 54°12°) | 52°11° | 0% | 1 mph2 km/h from SE, gusts 6 mph9 km/h | 83% | 42% | 0 |
| Sun 3a | Partly cloudy | 51°11° (likely 49°9° to 53°12°) | 51°11° | 0% | 1 mph2 km/h from SE, gusts 5 mph7 km/h | 86% | 42% | 0 |
| Sun 4a | Partly cloudy | 51°11° (likely 48°9° to 53°12°) | 51°11° | 0% | 1 mph2 km/h from SE, gusts 6 mph9 km/h | 83% | 46% | 0 |
| Sun 5a | Mostly clear | 50°10° (likely 48°9° to 52°11°) | 50°10° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 86% | 53% | 0 |
| Sun 6a | Partly cloudy | 50°10° (likely 47°8° to 52°11°) | 50°10° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 86% | 22% | 0 |
| Sun 7a | Partly sunny | 49°9° (likely 46°8° to 51°11°) | 49°9° | 0% | 1 mph2 km/h from SE, gusts 4 mph6 km/h | 89% | 68% | 0 |
| Sun 8a | Partly sunny | 50°10° (likely 47°8° to 53°12°) | 50°10° | 0% | 1 mph2 km/h from SE, gusts 4 mph6 km/h | 89% | 39% | 0 |
| Sun 9a | Partly sunny | 57°14° (likely 53°12° to 57°14°) | 57°14° | 0% | 1 mph2 km/h from S, gusts 4 mph6 km/h | 77% | 84% | 1 |
| Sun 10a | Cloudy | 63°17° (likely 61°16° to 64°18°) | 63°17° | 0% | 1 mph2 km/h from S, gusts 6 mph10 km/h | 67% | 76% | 2 |
| Sun 11a | Cloudy | 69°21° (likely 65°18° to 70°21°) | 69°21° | 0% | 3 mph5 km/h from S, gusts 7 mph12 km/h | 55% | 73% | 3 |
| Sun 12p | Cloudy | 73°23° (likely 69°21° to 75°24°) | 73°23° | 0% | 3 mph5 km/h from S, gusts 7 mph10 km/h | 46% | 80% | 4 |
| Sun 1p | Cloudy | 75°24° (likely 72°22° to 77°25°) | 75°24° | 0% | 3 mph5 km/h from S, gusts 4 mph7 km/h | 41% | 81% | 4 |
| Sun 2p | Cloudy | 77°25° (likely 74°23° to 79°26°) | 77°25° | 0% | 2 mph3 km/h from SE, gusts 4 mph7 km/h | 39% | 81% | 4 |
| Sun 3p | Cloudy | 78°26° (likely 75°24° to 80°27°) | 78°26° | 0% | 2 mph3 km/h from SE, gusts 5 mph7 km/h | 36% | 81% | 3 |
| Sun 4p | Cloudy | 78°26° (likely 75°24° to 79°26°) | 78°26° | 0% | 2 mph3 km/h from SE, gusts 5 mph9 km/h | 36% | 79% | 3 |
| Sun 5p | Cloudy | 77°25° (likely 72°22° to 78°26°) | 77°25° | 0% | 1 mph2 km/h from SE, gusts 6 mph10 km/h | 39% | 80% | 1 |
| Sun 6p | Cloudy | 73°23° (likely 68°20° to 73°23°) | 73°23° | 0% | 2 mph3 km/h from SE, gusts 6 mph10 km/h | 44% | 80% | 0 |
| Sun 7p | Cloudy | 67°19° (likely 65°18° to 68°20°) | 67°19° | 0% | 2 mph3 km/h from SE, gusts 7 mph11 km/h | 54% | 80% | 0 |
| Sun 8p | Cloudy | 63°17° (likely 63°17° to 67°19°) | 63°17° | 0% | 2 mph3 km/h from SE, gusts 8 mph12 km/h | 62% | 81% | 0 |
| Sun 9p | Cloudy | 61°16° (likely 61°16° to 65°18°) | 61°16° | 0% | 2 mph3 km/h from SE, gusts 9 mph14 km/h | 67% | 81% | 0 |
| Sun 10p | Cloudy | 59°15° (likely 59°15° to 62°17°) | 59°15° | 0% | 2 mph3 km/h from S, gusts 10 mph16 km/h | 72% | 81% | 0 |
| Sun 11p | Cloudy | 58°14° (likely 58°14° to 62°17°) | 58°14° | 0% | 2 mph3 km/h from S, gusts 9 mph15 km/h | 75% | 81% | 0 |
| Mon 12a | Cloudy | 57°14° (likely 57°14° to 61°16°) | 57°14° | 0% | 2 mph3 km/h from S, gusts 8 mph13 km/h | 75% | 82% | 0 |
| Mon 1a | Cloudy | 56°13° (likely 56°13° to 60°16°) | 56°13° | 0% | 2 mph3 km/h from S, gusts 7 mph11 km/h | 77% | 82% | 0 |
| Mon 2a | Cloudy | 55°13° (likely 55°13° to 59°15°) | 55°13° | 0% | 1 mph2 km/h from S, gusts 6 mph10 km/h | 80% | 82% | 0 |
| Mon 3a | Cloudy | 53°12° (likely 53°12° to 58°14°) | 53°12° | 0% | 1 mph2 km/h from S, gusts 5 mph9 km/h | 83% | 82% | 0 |
| Mon 4a | Cloudy | 53°12° (likely 53°12° to 56°13°) | 53°12° | 0% | 1 mph2 km/h from S, gusts 5 mph8 km/h | 83% | 83% | 0 |
| Mon 5a | Cloudy | 53°12° (likely 53°12° to 56°13°) | 53°12° | 0% | 1 mph2 km/h from S, gusts 5 mph8 km/h | 83% | 87% | 0 |
| Mon 6a | Cloudy | 52°11° (likely 52°11° to 55°13°) | 52°11° | 0% | 1 mph2 km/h from S, gusts 5 mph8 km/h | 86% | 87% | 0 |
| Mon 7a | Cloudy | 52°11° (likely 52°11° to 55°13°) | 52°11° | 0% | 1 mph2 km/h from S, gusts 5 mph8 km/h | 86% | 86% | 0 |
| Mon 8a | Cloudy | 53°12° (likely 53°12° to 56°13°) | 53°12° | 0% | 1 mph2 km/h from S, gusts 5 mph8 km/h | 86% | 95% | 0 |
| Mon 9a | Cloudy | 57°14° (likely 57°14° to 60°16°) | 57°14° | 0% | 1 mph2 km/h from SW, gusts 6 mph9 km/h | 80% | 89% | 1 |
| Mon 10a | Cloudy | 65°18° (likely 63°17° to 67°19°) | 65°18° | 0% | 1 mph2 km/h from SW, gusts 9 mph15 km/h | 65% | 83% | 2 |
| Mon 11a | Cloudy | 70°21° (likely 67°19° to 71°22°) | 70°21° | 0% | 1 mph2 km/h from SW, gusts 10 mph17 km/h | 55% | 85% | 3 |
| Mon 12p | Cloudy | 73°23° (likely 71°22° to 75°24°) | 73°23° | 0% | 2 mph3 km/h from SW, gusts 10 mph15 km/h | 49% | 77% | 4 |
| Mon 1p | Cloudy | 75°24° (likely 73°23° to 77°25°) | 75°24° | 0% | 2 mph3 km/h from SW, gusts 9 mph14 km/h | 43% | 78% | 3 |
| Mon 2p | Cloudy | 77°25° (likely 73°23° to 78°26°) | 77°25° | 0% | 2 mph3 km/h from SW, gusts 7 mph12 km/h | 40% | 73% | 4 |
Days ahead
Shaded: typical range for these dates (1991–2020)
Today, Oct 24. Partly sunny. High 76°24°, low 49°9°. Typical 66°19° / 43°6°. Dry. Mostly agree.
Afternoon
noon–6 PM
Partly sunny, 76°24°Dry
Evening
6 PM–midnight
Mostly clear, 60°16°Dry
Overnight
midnight–6 AM
Partly cloudy, 50°10°Dry
Official NWS forecast
Today: Mostly sunny, with a high near 76. Southeast wind around 6 mph.
Tonight: Partly cloudy, with a low around 49. Southeast wind 1 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 73°23°–76°24°
- Low, likely
- 46°8°–49°9°
- Typical high / low
- 66°19° / 43°6°
- Wind
- 7 mph11 km/h, gusts 14 mph23 km/h
- UV peak
- 4
Tomorrow, Oct 25. Cloudy. High 78°26°, low 52°11°. Typical 66°19° / 43°6°. Dry. Mostly agree.
Morning
6 AM–noon
Partly sunny, 50°10°Dry
Afternoon
noon–6 PM
Cloudy, 78°26°Dry
Evening
6 PM–midnight
Cloudy, 63°17°Dry
Overnight
midnight–6 AM
Cloudy, 53°12°Dry
Official NWS forecast
Day: Mostly sunny, with a high near 78. Southeast wind around 3 mph.
Night: Mostly cloudy, with a low around 52. South wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 75°24°–80°27°
- Low, likely
- 46°8°–52°11°
- Typical high / low
- 66°19° / 43°6°
- Wind
- 8 mph12 km/h, gusts 15 mph24 km/h
- UV peak
- 4
Monday, Oct 26. Cloudy. High 78°26°, low 51°11°. Typical 65°18° / 42°6°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 53°12°Dry
Afternoon
noon–6 PM
Cloudy, 77°25°Dry
Evening
6 PM–midnight
Cloudy, 63°17°Dry
Overnight
midnight–6 AM
Cloudy, 54°12°Dry
Official NWS forecast
Day: Partly sunny. High near 78, with temperatures falling to around 74 in the afternoon. South wind around 2 mph.
Night: Partly cloudy, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 73°23°–78°26°
- Low, likely
- 51°11°–54°12°
- Typical high / low
- 65°18° / 42°6°
- Wind
- 7 mph11 km/h, gusts 13 mph20 km/h
- UV peak
- 4
Tuesday, Oct 27. Cloudy. High 76°24°, low 53°12°. Typical 65°18° / 42°6°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 55°13°Dry
Afternoon
noon–6 PM
Cloudy, 74°23°Dry
Evening
6 PM–midnight
Cloudy, 64°18°Dry
Overnight
midnight–6 AM
Clear, 54°12°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 53.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 71°22°–76°24°
- Low, likely
- 51°11°–56°13°
- Typical high / low
- 65°18° / 42°6°
- Wind
- 9 mph14 km/h, gusts 20 mph31 km/h
- UV peak
- 3
Wednesday, Oct 28. Partly sunny. High 81°27°, low 55°13°. Typical 64°18° / 42°6°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 55°13°Dry
Afternoon
noon–6 PM
Sunny, 79°26°Dry
Evening
6 PM–midnight
Clear, 66°19°Dry
Overnight
midnight–6 AM
Clear, 56°13°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 81.
Night: Mostly clear, with a low around 55.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 76°24°–81°27°
- Low, likely
- 49°9°–56°13°
- Typical high / low
- 64°18° / 42°6°
- Wind
- 11 mph18 km/h, gusts 20 mph32 km/h
- UV peak
- 4
Thursday, Oct 29. Mostly sunny. High 83°28°, low 56°13°. Typical 64°18° / 41°5°. Dry. Mostly agree.
Morning
6 AM–noon
Mostly sunny, 58°15°Dry
Afternoon
noon–6 PM
Sunny, 82°28°Dry
Evening
6 PM–midnight
Mostly clear, 68°20°Dry
Overnight
midnight–6 AM
Mostly clear, 57°14°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 83.
Night: Mostly clear, with a low around 56.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 79°26°–83°28°
- Low, likely
- 53°12°–57°14°
- Typical high / low
- 64°18° / 41°5°
- Wind
- 11 mph17 km/h, gusts 26 mph41 km/h
- UV peak
- 4
Friday, Oct 30. Cloudy. High 81°27°, low 58°14°. Typical 63°17° / 41°5°. Dry. Forecasts differ.
Morning
6 AM–noon
Mostly sunny, 59°15°Dry
Afternoon
noon–6 PM
Cloudy, 79°26°Dry
Evening
6 PM–midnight
Cloudy, 68°20°Dry
Overnight
midnight–6 AM
Cloudy, 58°15°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 81.
Night: Mostly cloudy, with a low around 58.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 75°24°–82°28°
- Low, likely
- 54°12°–58°14°
- Typical high / low
- 63°17° / 41°5°
- Wind
- 11 mph18 km/h, gusts 20 mph33 km/h
- UV peak
- 4
Saturday, Oct 31. Drizzle. High 74°23°, low 60°16°. Typical 63°17° / 41°5°. Rain 0.09 in2.3 mm, 50% chance. Mostly agree.
Morning
6 AM–noon
Cloudy, 61°16°30% chance
Afternoon
noon–6 PM
Cloudy, 75°24°40% chance
Evening
6 PM–midnight
Drizzle, 68°20°50% chance · 0.05 in1.3 mm
Overnight
midnight–6 AM
Drizzle, 65°18°50% chance · 0.16 in4 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
- 72°22°–77°25°
- Low, likely
- 58°14°–63°17°
- Typical high / low
- 63°17° / 41°5°
- Wind
- 16 mph26 km/h, gusts 25 mph40 km/h
- UV peak
- 1
Sunday, Nov 1. Drizzle. High 76°24°, low 62°17°. Typical 62°17° / 40°4°. Rain 0.35 in8.9 mm, 50% chance. Forecasts differ.
Morning
6 AM–noon
Partly sunny, 66°19°40% chance · 0.05 in1.3 mm
Afternoon
noon–6 PM
Drizzle, 77°25°30% chance
Evening
6 PM–midnight
Drizzle, 70°21°30% chance · 0.1 in2.5 mm
Overnight
midnight–6 AM
Partly cloudy, 54°12°30% chance · 0.04 in0.9 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
- 72°22°–81°27°
- Low, likely
- 58°14°–63°17°
- Typical high / low
- 62°17° / 40°4°
- Wind
- 17 mph28 km/h, gusts 41 mph67 km/h
- UV peak
- 3
Monday, Nov 2. Drizzle. High 66°19°, low 53°12°. Typical 62°17° / 40°4°. Rain 0.28 in7.1 mm, 40% chance. Forecasts differ.
Morning
6 AM–noon
Sunny, 54°12°40% chance · 0.05 in1.4 mm
Afternoon
noon–6 PM
Drizzle, 57°14°30% chance · 0.09 in2.4 mm
Evening
6 PM–midnight
Drizzle, 55°13°30% chance · 0.02 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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 55°13°–74°23°
- Low, likely
- 40°4°–67°19°
- Typical high / low
- 62°17° / 40°4°
- Wind
- 24 mph38 km/h, gusts 39 mph63 km/h
- UV peak
- 2
The outlook
Today
Dry, high 76°, low 49°.
Tomorrow
Dry, high 78°, low 52°.
Monday
Dry, high 78°, low 51°.
Rest of week
Highs 66–83°; chance of precipitation on Saturday, 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
Rivers
NOAA river gauges within 25 mi
Below flood stage
Missouri River at St. Charles
23 mi- Level
- 12.2 ft
- Flow
- 63,500 cfs
Forecast peak 12.1 ft Sat 7 PM
Reading from Sat 3 PM · NWS gauge page
Mississippi River at Mel Price (Alton) Lock and Dam
25 mi- Level
- 6.7 ft
- Flow
- 109,000 cfs
Forecast peak 7.5 ft Sat 7 PM
Reading from Sat 3 PM · NWS gauge page
Meramec River at Arnold
8.8 mi- Level
- 5.7 ft
- Flow
- 7,130 cfs
Reading from Sat 3 PM · NWS gauge page
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
About 85% less heating than a typical week.
This week 12Typical 82
Heating degree days, base 65°F
Comfort
Dry air outside (dew point 45°F).
Open the windows?
Today, 4:00 PM–8:00 PM
Good stretch to open the windows.
Is this typical?
Cahokia St. Louis Downtown Airport · official normals 1991–2020 · records 1997–2026
Oct 24, today vs a typical year
Today’s expected high is 10°6° warmer than typical.
- Normal high / low
- 66°19° / 43°6°
- Forecast high / low
- 76°24° / 49°9°
- Record high
- 82°28° in 2012
- Record low
- 25°−4° in 2006
Last 7 days vs normal
On average 1° warmer than normal (daily mean temperature).
- −6°−3°SunOct 18
- −2°−1°MonOct 19
- +3°+2°TueOct 20
- +4°+2°WedOct 21
- +5°+3°ThuOct 22
- +6°+3°FriOct 23
- —SatOct 24
Dupo weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:19 AM, sunset 6:10 PM.
- Daylight
- 10 h 51 min
- Losing 2 min 21 s a day; shortest Dec 21, 1 h 23 min less
- Golden hour
- 5:33–6:27 PM
- Morning 7:02–7:55 AM
- Blue hour
- 6:27–6:37 PM
- Morning 6:52–7:02 AM; first light 6:52 AM
Stars tonight? Fair
Mostly clear 6:37 PM–2 AM, but the moon is 99% lit and up.
Moon
Waxing gibbous
98% lit · growing
- Today
- sets 5:34 AM · rises 5:07 PM
- Full moon
- Oct 25
- New moon
- Nov 9
