Mississippi River at St. Louis
25 mi- Level
- 7.8 ft
- Flow
- 168,000 cfs
Forecast peak 8.0 ft Sat 7 PM
Reading from Sat 2 PM · NWS gauge page
Observed 2:55 PM CDT at KSAR
Hecker, IL weather
Sunny and 75°24°.
Today: low 48°9° (likely 45°7° to 48°9°), high 76°24° (likely 74°23° to 76°24°).
Now 75°24°
Sunny
- Wind
- Calm
- Up to 5 mph8 km/h through 3 AM
- Dew point
- 41°5°
- Comfortable
- UV index
- 3Moderate
- Moderate until 4 PM · peak 5
- Air quality
- 61Moderate
- Main pollutant: Ozone
- Pressure
- 30.34 inHg1027 hPa
- Falling slowly · −0.03 inHg−1.2 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 (74°23° then, 75°24° now)
Good hours for
This afternoonNear 74°23° · 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 4 PM · Mostly cloudy
Tomorrow nightDown to 52°11° by 4 AM · Mostly cloudy
Monday morningUp to 69°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 | 74°23° (likely 73°23° to 75°24°) | 74°23° | 0% | 5 mph8 km/h from SE, gusts 6 mph10 km/h | 35% | 57% | 3 |
| Sat 4p | Cloudy | 75°24° (likely 73°23° to 75°24°) | 75°24° | 0% | 5 mph8 km/h from SE, gusts 8 mph12 km/h | 34% | 73% | 1 |
| Sat 5p | Sunny | 74°23° (likely 70°21° to 75°24°) | 74°23° | 0% | 3 mph5 km/h from SE, gusts 8 mph13 km/h | 35% | 19% | 1 |
| Sat 6p | Partly cloudy | 70°21° (likely 65°18° to 70°21°) | 70°21° | 0% | 3 mph5 km/h from SE, gusts 6 mph9 km/h | 42% | 20% | 0 |
| Sat 7p | Clear | 64°18° (likely 62°17° to 65°18°) | 64°18° | 0% | 2 mph3 km/h from SE, gusts 7 mph11 km/h | 54% | 8% | 0 |
| Sat 8p | Clear | 60°16° (likely 59°15° to 63°17°) | 60°16° | 0% | 1 mph2 km/h from SE, gusts 7 mph10 km/h | 62% | 40% | 0 |
| Sat 9p | Clear | 57°14° (likely 57°14° to 60°16°) | 57°14° | 0% | 1 mph2 km/h from SE, gusts 8 mph13 km/h | 69% | 41% | 0 |
| Sat 10p | Mostly clear | 55°13° (likely 55°13° to 58°14°) | 55°13° | 0% | 1 mph2 km/h from SE, gusts 8 mph13 km/h | 77% | 56% | 0 |
| Sat 11p | Mostly clear | 54°12° (likely 53°12° to 56°13°) | 54°12° | 0% | 1 mph2 km/h from SE, gusts 6 mph10 km/h | 77% | 14% | 0 |
| Sun 12a | Clear | 53°12° (likely 52°11° to 55°13°) | 53°12° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 80% | 2% | 0 |
| Sun 1a | Mostly clear | 52°11° (likely 51°11° to 54°12°) | 52°11° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 83% | 13% | 0 |
| Sun 2a | Clear | 51°11° (likely 50°10° to 53°12°) | 51°11° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 86% | 18% | 0 |
| Sun 3a | Clear | 50°10° (likely 49°9° to 52°11°) | 50°10° | 0% | 1 mph2 km/h from SE, gusts 4 mph7 km/h | 89% | 42% | 0 |
| Sun 4a | Partly cloudy | 49°9° (likely 48°9° to 51°11°) | 49°9° | 0% | 1 mph2 km/h from SE, gusts 3 mph5 km/h | 89% | 46% | 0 |
| Sun 5a | Partly cloudy | 49°9° (likely 47°8° to 50°10°) | 49°9° | 0% | 1 mph2 km/h from SE, gusts 3 mph5 km/h | 89% | 62% | 0 |
| Sun 6a | Partly cloudy | 48°9° (likely 47°8° to 50°10°) | 48°9° | 0% | 1 mph2 km/h from SE, gusts 3 mph5 km/h | 93% | 68% | 0 |
| Sun 7a | Cloudy | 48°9° (likely 46°8° to 49°9°) | 48°9° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 93% | 77% | 0 |
| Sun 8a | Cloudy | 49°9° (likely 46°8° to 51°11°) | 49°9° | 0% | 0 mph0 km/h, gusts 3 mph4 km/h | 93% | 68% | 0 |
| Sun 9a | Partly sunny | 55°13° (likely 53°12° to 56°13°) | 55°13° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 83% | 80% | 1 |
| Sun 10a | Cloudy | 62°17° (likely 60°16° to 62°17°) | 62°17° | 0% | 1 mph2 km/h from S, gusts 4 mph7 km/h | 70% | 77% | 2 |
| Sun 11a | Cloudy | 68°20° (likely 67°19° to 69°21°) | 68°20° | 0% | 3 mph5 km/h from S, gusts 8 mph14 km/h | 57% | 79% | 3 |
| Sun 12p | Mostly cloudy | 72°22° (likely 71°22° to 74°23°) | 72°22° | 0% | 3 mph5 km/h from S, gusts 7 mph11 km/h | 48% | 71% | 4 |
| Sun 1p | Cloudy | 75°24° (likely 74°23° to 77°25°) | 75°24° | 0% | 3 mph5 km/h from S, gusts 5 mph9 km/h | 41% | 82% | 4 |
| Sun 2p | Cloudy | 77°25° (likely 75°24° to 78°26°) | 77°25° | 0% | 3 mph5 km/h from SE, gusts 5 mph7 km/h | 37% | 79% | 4 |
| Sun 3p | Cloudy | 77°25° (likely 76°24° to 79°26°) | 77°25° | 0% | 2 mph3 km/h from SE, gusts 5 mph8 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 mph8 km/h | 35% | 80% | 2 |
| Sun 5p | Cloudy | 77°25° (likely 73°23° to 78°26°) | 77°25° | 0% | 1 mph2 km/h from SE, gusts 6 mph10 km/h | 37% | 74% | 1 |
| Sun 6p | Cloudy | 73°23° (likely 68°20° to 73°23°) | 73°23° | 0% | 1 mph2 km/h from SE, gusts 5 mph9 km/h | 44% | 81% | 0 |
| Sun 7p | Cloudy | 66°19° (likely 64°18° to 69°21°) | 66°19° | 0% | 2 mph3 km/h from SE, gusts 6 mph9 km/h | 56% | 81% | 0 |
| Sun 8p | Cloudy | 62°17° (likely 62°17° to 65°18°) | 62°17° | 0% | 2 mph3 km/h from SE, gusts 7 mph12 km/h | 65% | 81% | 0 |
| Sun 9p | Cloudy | 60°16° (likely 60°16° to 63°17°) | 60°16° | 0% | 2 mph3 km/h from SE, gusts 10 mph15 km/h | 69% | 81% | 0 |
| Sun 10p | Cloudy | 58°14° (likely 58°14° to 61°16°) | 58°14° | 0% | 2 mph3 km/h from S, gusts 10 mph15 km/h | 75% | 81% | 0 |
| Sun 11p | Cloudy | 57°14° (likely 57°14° to 59°15°) | 57°14° | 0% | 1 mph2 km/h from S, gusts 8 mph13 km/h | 77% | 81% | 0 |
| Mon 12a | Cloudy | 56°13° (likely 56°13° to 58°14°) | 56°13° | 0% | 1 mph2 km/h from S, gusts 7 mph11 km/h | 80% | 81% | 0 |
| Mon 1a | Cloudy | 55°13° (likely 55°13° to 57°14°) | 55°13° | 0% | 1 mph2 km/h from S, gusts 6 mph10 km/h | 83% | 83% | 0 |
| Mon 2a | Cloudy | 54°12° (likely 54°12° to 56°13°) | 54°12° | 0% | 1 mph2 km/h from S, gusts 5 mph8 km/h | 83% | 83% | 0 |
| Mon 3a | Cloudy | 53°12° (likely 52°11° to 56°13°) | 53°12° | 0% | 1 mph2 km/h from S, gusts 5 mph7 km/h | 86% | 83% | 0 |
| Mon 4a | Cloudy | 52°11° (likely 51°11° to 55°13°) | 52°11° | 0% | 1 mph2 km/h from S, gusts 4 mph7 km/h | 89% | 82% | 0 |
| Mon 5a | Cloudy | 52°11° (likely 52°11° to 54°12°) | 52°11° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 89% | 86% | 0 |
| Mon 6a | Cloudy | 52°11° (likely 51°11° to 54°12°) | 52°11° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 86% | 88% | 0 |
| Mon 7a | Cloudy | 51°11° (likely 51°11° to 54°12°) | 51°11° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 89% | 91% | 0 |
| Mon 8a | Cloudy | 52°11° (likely 51°11° to 55°13°) | 52°11° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 89% | 95% | 0 |
| Mon 9a | Cloudy | 57°14° (likely 55°13° to 59°15°) | 57°14° | 0% | 0 mph0 km/h, gusts 5 mph9 km/h | 80% | 89% | 1 |
| Mon 10a | Cloudy | 64°18° (likely 62°17° to 65°18°) | 64°18° | 0% | 0 mph0 km/h, gusts 9 mph14 km/h | 65% | 88% | 2 |
| Mon 11a | Cloudy | 69°21° (likely 67°19° to 71°22°) | 69°21° | 0% | 1 mph2 km/h from SW, gusts 9 mph14 km/h | 55% | 72% | 3 |
| Mon 12p | Cloudy | 72°22° (likely 71°22° to 74°23°) | 72°22° | 0% | 1 mph2 km/h from SW, gusts 9 mph14 km/h | 49% | 75% | 3 |
| Mon 1p | Cloudy | 75°24° (likely 73°23° to 76°24°) | 75°24° | 0% | 2 mph3 km/h from SW, gusts 8 mph13 km/h | 41% | 71% | 4 |
| Mon 2p | Mostly cloudy | 77°25° (likely 73°23° to 77°25°) | 77°25° | 0% | 2 mph3 km/h from SW, gusts 7 mph11 km/h | 39% | 63% | 4 |
Days ahead
Tap a day for its hours and the official wording.
Today, Oct 24. Cloudy. High 76°24°, low 48°9°. Dry. Forecasts agree.
Afternoon
noon–6 PM
Cloudy, 75°24°Dry
Evening
6 PM–midnight
Clear, 60°16°Dry
Overnight
midnight–6 AM
Clear, 49°9°Dry
Official NWS forecast
Today: Mostly sunny, with a high near 76. Southeast wind around 5 mph.
Tonight: Partly cloudy, with a low around 48. Southeast wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 74°23°–76°24°
- Low, likely
- 45°7°–48°9°
- Wind
- 6 mph10 km/h, gusts 13 mph21 km/h
- UV peak
- 5
Tomorrow, Oct 25. Cloudy. High 78°26°, low 51°11°. Dry. Mostly agree.
Morning
6 AM–noon
Partly sunny, 49°9°Dry
Afternoon
noon–6 PM
Cloudy, 78°26°Dry
Evening
6 PM–midnight
Cloudy, 62°17°Dry
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 51. South wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 76°24°–79°26°
- Low, likely
- 46°8°–51°11°
- Wind
- 7 mph10 km/h, gusts 15 mph24 km/h
- UV peak
- 4
Monday, Oct 26. Cloudy. High 77°25°, low 50°10°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 52°11°Dry
Afternoon
noon–6 PM
Cloudy, 77°25°Dry
Evening
6 PM–midnight
Clear, 62°17°Dry
Overnight
midnight–6 AM
Cloudy, 53°12°Dry
Official NWS forecast
Day: Partly sunny, with a high near 77. South wind around 2 mph.
Night: Partly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 74°23°–77°25°
- Low, likely
- 50°10°–53°12°
- Wind
- 8 mph12 km/h, gusts 13 mph22 km/h
- UV peak
- 4
Tuesday, Oct 27. Cloudy. High 76°24°, low 51°11°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 53°12°Dry
Afternoon
noon–6 PM
Cloudy, 74°23°Dry
Evening
6 PM–midnight
Cloudy, 62°17°Dry
Overnight
midnight–6 AM
Clear, 53°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 76.
Night: Mostly cloudy, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 72°22°–76°24°
- Low, likely
- 48°9°–55°13°
- Wind
- 10 mph17 km/h, gusts 16 mph26 km/h
- UV peak
- 4
Wednesday, Oct 28. Partly sunny. High 80°27°, low 53°12°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 54°12°Dry
Afternoon
noon–6 PM
Sunny, 79°26°Dry
Evening
6 PM–midnight
Clear, 65°18°Dry
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 53.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 76°24°–80°27°
- Low, likely
- 48°9°–55°13°
- Wind
- 12 mph19 km/h, gusts 21 mph34 km/h
- UV peak
- 4
Thursday, Oct 29. Mostly sunny. High 82°28°, low 53°12°. Dry. Mostly agree.
Morning
6 AM–noon
Mostly sunny, 57°14°Dry
Afternoon
noon–6 PM
Sunny, 81°27°Dry
Evening
6 PM–midnight
Mostly clear, 67°19°Dry
Overnight
midnight–6 AM
Partly cloudy, 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
- 79°26°–82°28°
- Low, likely
- 51°11°–57°14°
- Wind
- 11 mph18 km/h, gusts 28 mph44 km/h
- UV peak
- 4
Friday, Oct 30. Cloudy. High 80°27°, low 56°13°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 57°14°Dry
Afternoon
noon–6 PM
Cloudy, 79°26°Dry
Evening
6 PM–midnight
Cloudy, 66°19°Dry
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 56.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 75°24°–81°27°
- Low, likely
- 52°11°–57°14°
- Wind
- 13 mph20 km/h, gusts 20 mph32 km/h
- UV peak
- 4
Saturday, Oct 31. Drizzle. High 75°24°, low 59°15°. Rain 0.1 in2.5 mm, 40% chance. Mostly agree.
Morning
6 AM–noon
Cloudy, 61°16°30% chance
Afternoon
noon–6 PM
Cloudy, 76°25°30% chance
Evening
6 PM–midnight
Drizzle, 69°21°40% chance · 0.05 in1.3 mm
Overnight
midnight–6 AM
Drizzle, 64°18°40% chance · 0.11 in2.8 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
- 57°14°–62°17°
- Wind
- 17 mph27 km/h, gusts 23 mph37 km/h
- UV peak
- 2
Sunday, Nov 1. Showers. High 77°25°, low 62°17°. Rain 0.5 in13 mm, 50% chance. Forecasts differ.
Morning
6 AM–noon
Mostly sunny, 66°19°40% chance · 0.05 in1.2 mm
Afternoon
noon–6 PM
Showers, 78°26°30% chance · 0.08 in2.1 mm
Evening
6 PM–midnight
Showers, 68°20°30% chance · 0.27 in6.8 mm
Overnight
midnight–6 AM
Drizzle, 54°12°40% chance · 0.06 in1.5 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°–82°28°
- Low, likely
- 59°15°–64°18°
- Wind
- 18 mph29 km/h, gusts 41 mph66 km/h
- UV peak
- 3
Monday, Nov 2. Drizzle. High 67°19°, low 53°12°. Rain 0.29 in7.4 mm, 40% chance. Forecasts differ.
Morning
6 AM–noon
Drizzle, 54°12°40% chance · 0.08 in1.9 mm
Afternoon
noon–6 PM
Drizzle, 58°15°40% chance · 0.06 in1.5 mm
Evening
6 PM–midnight
Drizzle, 56°13°30% chance · 0.01 in0.3 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
- 55°13°–76°24°
- Low, likely
- 40°4°–66°19°
- Wind
- 24 mph38 km/h, gusts 40 mph64 km/h
- UV peak
- 3
The outlook
Today
Dry, high 76°, low 48°.
Tomorrow
Dry, high 78°, low 51°.
Monday
Dry, high 77°, low 50°.
Rest of week
Highs 67–82°; 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
Kaskaskia River at New Athens
5.8 mi- Level
- 68.6 ft
- Flow
- 583 cfs
Reading from Sat 1 PM · NWS gauge page
Silver Creek near Mascoutah
18 mi- Level
- 7.9 ft
- Flow
- 1,430 cfs
Reading from Sat 1:45 PM · NWS gauge page
Mississippi River at Herculaneum
21 mi- Level
- 5.9 ft
Reading from Sat 1:30 PM · NWS gauge page
Sun & moon
Sun
Sunrise 7:17 AM, sunset 6:09 PM.
- Daylight
- 10 h 52 min
- Losing 2 min 16 s a day; shortest Dec 21, 1 h 22 min less
- Golden hour
- 5:33–6:26 PM
- Morning 7:01–7:54 AM
- Blue hour
- 6:26–6:36 PM
- Morning 6:50–7:01 AM; first light 6:50 AM
Stars tonight? Fair
Mostly clear 11 PM–3 AM, 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
