Mississippi River at Herculaneum
1.2 mi- Level
- 6.1 ft
Reading from Sat 6 AM · NWS gauge page
Observed 6:53 AM CDT at KCPS
Herculaneum, MO weather
Clear and 44°7°.
Today: low 45°7° (likely 44°7° to 50°10°), high 76°24° (likely 75°24° to 76°24°).
Now 44°7°
Clear
- Wind
- Calm
- Light through 8 PM
- Dew point
- 44°7°
- Comfortable
- Humidity
- 100%
- Air 44°7°, dew point 44°7° · fog or dew likely
- UV index
- 0Low
- Moderate 11 AM–4 PM · peak 4
- Air quality
- 30Good
- Main pollutant: Ozone
- Pressure
- 30.34 inHg1027 hPa
- Rising · +0.05 inHg+1.8 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 (46°8° then, 44°7° now)
Good hours for
This morningUp to 65°18° by 11 AM · Mostly cloudy
This afternoonUp to 76°24° by 4 PM · Mostly cloudy
TonightDown to 47°8° by 4 AM · Partly cloudy
Tomorrow morningUp to 68°20° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 79°26° by 4 PM · Mostly cloudy
Tomorrow nightDown to 49°9° by 5 AM · Cloudy
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 8a | Fog | 46°8° (likely 45°7° to 52°11°) | 46°8° | 0% | 1 mph2 km/h from SE, gusts 3 mph4 km/h | 96% | 47% | 0 |
| Sat 9a | Partly sunny | 52°11° (likely 51°11° to 56°13°) | 52°11° | 0% | 1 mph2 km/h from SE, gusts 6 mph9 km/h | 86% | 56% | 1 |
| Sat 10a | Mostly sunny | 59°15° (likely 58°14° to 62°17°) | 59°15° | 0% | 1 mph2 km/h from SE, gusts 7 mph11 km/h | 75% | 69% | 1 |
| Sat 11a | Cloudy | 65°18° (likely 64°18° to 67°19°) | 65°18° | 0% | 2 mph3 km/h from SE, gusts 8 mph12 km/h | 60% | 75% | 3 |
| Sat 12p | Mostly sunny | 70°21° (likely 69°21° to 71°22°) | 70°21° | 0% | 2 mph3 km/h from SE, gusts 7 mph11 km/h | 49% | 72% | 4 |
| Sat 1p | Partly sunny | 73°23° (likely 73°23° to 73°23°) | 73°23° | 0% | 3 mph5 km/h from SE, gusts 7 mph11 km/h | 43% | 74% | 4 |
| Sat 2p | Partly sunny | 74°23° (likely 74°23° to 75°24°) | 74°23° | 0% | 3 mph5 km/h from SE, gusts 7 mph12 km/h | 40% | 72% | 4 |
| Sat 3p | Cloudy | 75°24° (likely 75°24° to 76°24°) | 75°24° | 0% | 3 mph5 km/h from E, gusts 8 mph12 km/h | 38% | 60% | 3 |
| Sat 4p | Partly sunny | 76°24° (likely 74°23° to 76°24°) | 76°24° | 0% | 3 mph5 km/h from E, gusts 8 mph13 km/h | 37% | 63% | 2 |
| Sat 5p | Mostly sunny | 74°23° (likely 71°22° to 74°23°) | 74°23° | 0% | 3 mph5 km/h from E, gusts 8 mph13 km/h | 40% | 55% | 1 |
| Sat 6p | Mostly clear | 71°22° (likely 66°19° to 71°22°) | 71°22° | 0% | 3 mph5 km/h from E, gusts 7 mph12 km/h | 44% | 47% | 0 |
| Sat 7p | Clear | 66°19° (likely 63°17° to 66°19°) | 66°19° | 0% | 2 mph3 km/h from E, gusts 7 mph11 km/h | 54% | 44% | 0 |
| Sat 8p | Partly cloudy | 59°15° (likely 59°15° to 62°17°) | 59°15° | 0% | 2 mph3 km/h from SE, gusts 6 mph9 km/h | 67% | 47% | 0 |
| Sat 9p | Partly cloudy | 56°13° (likely 56°13° to 60°16°) | 56°13° | 0% | 1 mph2 km/h from SE, gusts 5 mph9 km/h | 72% | 54% | 0 |
| Sat 10p | Partly cloudy | 54°12° (likely 54°12° to 59°15°) | 54°12° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 77% | 59% | 0 |
| Sat 11p | Mostly clear | 53°12° (likely 53°12° to 57°14°) | 53°12° | 0% | 1 mph2 km/h from SE, gusts 5 mph7 km/h | 80% | 63% | 0 |
| Sun 12a | Mostly clear | 52°11° (likely 52°11° to 56°13°) | 52°11° | 0% | 0 mph0 km/h, gusts 4 mph6 km/h | 80% | 64% | 0 |
| Sun 1a | Cloudy | 51°11° (likely 51°11° to 55°13°) | 51°11° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 80% | 61% | 0 |
| Sun 2a | Partly cloudy | 50°10° (likely 50°10° to 54°12°) | 50°10° | 0% | 0 mph0 km/h, gusts 3 mph4 km/h | 83% | 49% | 0 |
| Sun 3a | Mostly clear | 49°9° (likely 49°9° to 53°12°) | 49°9° | 0% | 0 mph0 km/h, gusts 3 mph6 km/h | 83% | 54% | 0 |
| Sun 4a | Mostly clear | 47°8° (likely 47°8° to 52°11°) | 47°8° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 89% | 58% | 0 |
| Sun 5a | Mostly clear | 47°8° (likely 47°8° to 52°11°) | 47°8° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 86% | 64% | 0 |
| Sun 6a | Mostly clear | 47°8° (likely 46°8° to 51°11°) | 47°8° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 86% | 57% | 0 |
| Sun 7a | Cloudy | 45°7° (likely 45°7° to 51°11°) | 45°7° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 93% | 81% | 0 |
| Sun 8a | Cloudy | 47°8° (likely 46°8° to 53°12°) | 47°8° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 93% | 80% | 0 |
| Sun 9a | Cloudy | 52°11° (likely 52°11° to 58°14°) | 52°11° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 93% | 79% | 1 |
| Sun 10a | Cloudy | 62°17° (likely 61°16° to 64°18°) | 62°17° | 0% | 0 mph0 km/h, gusts 5 mph9 km/h | 72% | 67% | 2 |
| Sun 11a | Partly sunny | 68°20° (likely 67°19° to 70°21°) | 68°20° | 0% | 0 mph0 km/h, gusts 6 mph9 km/h | 61% | 72% | 3 |
| Sun 12p | Cloudy | 73°23° (likely 72°22° to 74°23°) | 73°23° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 49% | 85% | 4 |
| Sun 1p | Cloudy | 76°24° (likely 75°24° to 77°25°) | 76°24° | 0% | 1 mph2 km/h from SE, gusts 3 mph5 km/h | 43% | 85% | 4 |
| Sun 2p | Cloudy | 77°25° (likely 77°25° to 79°26°) | 77°25° | 0% | 1 mph2 km/h from SE, gusts 4 mph6 km/h | 40% | 83% | 4 |
| Sun 3p | Cloudy | 78°26° (likely 78°26° to 79°26°) | 78°26° | 0% | 2 mph3 km/h from SE, gusts 4 mph7 km/h | 39% | 84% | 3 |
| Sun 4p | Cloudy | 79°26° (likely 77°25° to 79°26°) | 79°26° | 0% | 2 mph3 km/h from SE, gusts 4 mph7 km/h | 36% | 86% | 2 |
| Sun 5p | Cloudy | 77°25° (likely 74°23° to 78°26°) | 77°25° | 0% | 2 mph3 km/h from E, gusts 5 mph9 km/h | 42% | 87% | 1 |
| Sun 6p | Cloudy | 74°23° (likely 69°21° to 74°23°) | 74°23° | 0% | 2 mph3 km/h from E, gusts 6 mph10 km/h | 46% | 88% | 0 |
| Sun 7p | Cloudy | 69°21° (likely 65°18° to 69°21°) | 69°21° | 0% | 2 mph3 km/h from E, gusts 6 mph9 km/h | 55% | 88% | 0 |
| Sun 8p | Cloudy | 62°17° (likely 62°17° to 65°18°) | 62°17° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 67% | 87% | 0 |
| Sun 9p | Cloudy | 58°14° (likely 58°14° to 63°17°) | 58°14° | 0% | 1 mph2 km/h from SE, gusts 6 mph9 km/h | 75% | 87% | 0 |
| Sun 10p | Cloudy | 57°14° (likely 57°14° to 62°17°) | 57°14° | 0% | 1 mph2 km/h from S, gusts 5 mph8 km/h | 77% | 86% | 0 |
| Sun 11p | Cloudy | 55°13° (likely 55°13° to 60°16°) | 55°13° | 0% | 1 mph2 km/h from S, gusts 4 mph6 km/h | 80% | 89% | 0 |
| Mon 12a | Cloudy | 54°12° (likely 54°12° to 60°16°) | 54°12° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 83% | 91% | 0 |
| Mon 1a | Cloudy | 53°12° (likely 53°12° to 59°15°) | 53°12° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 83% | 91% | 0 |
| Mon 2a | Cloudy | 52°11° (likely 52°11° to 59°15°) | 52°11° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 83% | 91% | 0 |
| Mon 3a | Cloudy | 51°11° (likely 51°11° to 59°15°) | 51°11° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 86% | 94% | 0 |
| Mon 4a | Cloudy | 50°10° (likely 50°10° to 58°14°) | 50°10° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 86% | 92% | 0 |
| Mon 5a | Cloudy | 49°9° (likely 49°9° to 58°14°) | 49°9° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 86% | 90% | 0 |
| Mon 6a | Cloudy | 48°9° (likely 48°9° to 58°14°) | 48°9° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 86% | 91% | 0 |
| Mon 7a | Cloudy | 48°9° (likely 48°9° to 57°14°) | 48°9° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 89% | 98% | 0 |
Days ahead
Tap a day for its hours and the official wording.
Today, Oct 24. Fog. High 76°24°, low 45°7°. Dry. Forecasts agree.
Morning
6 AM–noon
Mostly sunny, 46°8°Dry
Afternoon
noon–6 PM
Cloudy, 76°24°Dry
Evening
6 PM–midnight
Partly cloudy, 59°15°Dry
Overnight
midnight–6 AM
Mostly clear, 47°8°Dry
Official NWS forecast
Today: Patchy fog before 10am. Sunny, with a high near 76. Southeast wind around 3 mph.
Tonight: Mostly clear, with a low around 45. East wind 0 to 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 75°24°–76°24°
- Low, likely
- 44°7°–50°10°
- Wind
- 7 mph12 km/h
- UV peak
- 4
Tomorrow, Oct 25. Cloudy. High 79°26°, low 48°9°. Dry. Forecasts agree.
Morning
6 AM–noon
Cloudy, 47°8°Dry
Afternoon
noon–6 PM
Cloudy, 79°26°Dry
Evening
6 PM–midnight
Cloudy, 62°17°Dry
Overnight
midnight–6 AM
Cloudy, 49°9°Dry
Official NWS forecast
Day: Mostly sunny, with a high near 79. Southeast wind around 2 mph.
Night: Mostly cloudy, with a low around 48. Southeast wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 78°26°–79°26°
- Low, likely
- 45°7°–50°10°
- Wind
- 5 mph9 km/h
- UV peak
- 4
Monday, Oct 26. Cloudy. High 78°26°, low 47°8°. Dry. Forecasts agree.
Morning
6 AM–noon
Cloudy, 55°13°Dry
Afternoon
noon–6 PM
Partly sunny, 77°25°Dry
Evening
6 PM–midnight
Cloudy, 62°16°Dry
Overnight
midnight–6 AM
Cloudy, 53°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny. High near 78, with temperatures falling to around 74 in the afternoon. South wind around 2 mph.
Night: Mostly cloudy, with a low around 47.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 76°24°–78°26°
- Low, likely
- 47°8°–56°13°
- Wind
- 6 mph10 km/h
- UV peak
- 4
Tuesday, Oct 27. Cloudy. High 75°24°, low 48°9°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 54°12°Dry
Afternoon
noon–6 PM
Cloudy, 74°23°Dry
Evening
6 PM–midnight
Cloudy, 62°17°Dry
Overnight
midnight–6 AM
Partly cloudy, 54°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 75.
Night: Mostly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 72°22°–75°24°
- Low, likely
- 48°9°–55°13°
- Wind
- 8 mph13 km/h, gusts 20 mph31 km/h
- UV peak
- 3
Wednesday, Oct 28. Cloudy. High 79°26°, low 50°10°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 55°13°Dry
Afternoon
noon–6 PM
Sunny, 78°26°Dry
Evening
6 PM–midnight
Clear, 64°18°Dry
Overnight
midnight–6 AM
Clear, 57°14°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 79.
Night: Mostly clear, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 76°24°–80°27°
- Low, likely
- 49°9°–56°13°
- Wind
- 8 mph14 km/h, gusts 20 mph32 km/h
- UV peak
- 4
Thursday, Oct 29. Cloudy. High 78°26°, low 49°9°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 59°15°Dry
Afternoon
noon–6 PM
Mostly sunny, 80°27°Dry
Evening
6 PM–midnight
Clear, 66°19°Dry
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 78.
Night: Partly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 78°26°–81°27°
- Low, likely
- 49°9°–58°14°
- Wind
- 9 mph15 km/h, gusts 28 mph44 km/h
- UV peak
- 4
Friday, Oct 30. Partly sunny. High 77°25°, low 50°10°. Dry. Mostly agree. Best day outdoors this week.
Morning
6 AM–noon
Partly sunny, 58°14°Dry
Afternoon
noon–6 PM
Cloudy, 79°26°Dry
Evening
6 PM–midnight
Cloudy, 66°19°Dry
Overnight
midnight–6 AM
Cloudy, 58°14°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 77.
Night: A slight chance of rain showers after 1am. Mostly cloudy, with a low around 50. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 77°25°).
- High, likely
- 76°24°–81°27°
- Low, likely
- 50°10°–58°14°
- Wind
- 7 mph12 km/h, gusts 18 mph28 km/h
- UV peak
- 4
Saturday, Oct 31. Cloudy. High 75°24°, low 60°16°. Rain 0.1 in2.5 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 63°17°30% chance
Afternoon
noon–6 PM
Cloudy, 76°24°30% chance
Evening
6 PM–midnight
Cloudy, 68°20°30% chance · 0.01 in0.3 mm
Overnight
midnight–6 AM
Cloudy, 66°19°40% chance · 0.09 in2.3 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
- 70°21°–80°27°
- Low, likely
- 57°14°–63°17°
- Wind
- 10 mph16 km/h, gusts 22 mph35 km/h
- UV peak
- 2
Sunday, Nov 1. Showers. High 72°22°, low 63°17°. Rain 0.54 in14 mm, 50% chance. Forecasts differ.
Morning
6 AM–noon
Showers, 66°19°40% chance · 0.13 in3.3 mm
Afternoon
noon–6 PM
Showers, 69°21°40% chance · 0.16 in4.1 mm
Evening
6 PM–midnight
Drizzle, 67°20°40% chance · 0.08 in2 mm
Overnight
midnight–6 AM
Clear, 59°15°40% chance · 0.1 in2.5 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
- 68°20°–76°24°
- Low, likely
- 60°16°–65°18°
- Wind
- 17 mph27 km/h, gusts 37 mph59 km/h
Monday, Nov 2. Drizzle. High 68°20°, low 58°14°. Rain 0.3 in7.6 mm, 40% chance. Forecasts differ.
Morning
6 AM–noon
Drizzle, 60°16°30% chance · 0.15 in3.8 mm
Afternoon
noon–6 PM
Drizzle, 63°17°30% chance · 0.15 in3.8 mm
Evening
6 PM–midnight
Drizzle, 67°19°30% 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
- 58°14°–78°26°
- Low, likely
- 48°9°–67°19°
- Wind
- 22 mph35 km/h, gusts 39 mph63 km/h
- UV peak
- 2
The outlook
Today
Dry, high 76°, low 45°.
Tomorrow
Dry, high 79°, low 48°, warming up.
Monday
Dry, high 78°, low 47°.
Rest of week
Highs 68–79°; chance of precipitation on Sunday, Monday.
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
Joachim Creek at DeSoto
13 mi- Level
- 1.5 ft
- Flow
- 5 cfs
Reading from Sat 6:40 AM · NWS gauge page
Meramec River at Arnold
14 mi- Level
- 5.8 ft
- Flow
- 7,250 cfs
Reading from Sat 6:30 AM · NWS gauge page
Big River at Byrnesville
16 mi- Level
- 1.7 ft
- Flow
- 121 cfs
Reading from Sat 6:45 AM · NWS gauge page
Sun & moon
Sun
Sunrise 7:19 AM, sunset 6:11 PM.
- Daylight
- 10 h 52 min
- Losing 2 min 21 s a day; shortest Dec 21, 1 h 22 min less
- Golden hour
- 5:34–6:28 PM
- Morning 7:02–7:56 AM
- Blue hour
- 6:28–6:38 PM
- Morning 6:52–7:02 AM; first light 6:52 AM
Stars tonight? Poor
Clouds most of the night (about 56% cover).
Moon
Waxing gibbous
96% lit · growing
- Today
- sets 5:34 AM · rises 5:08 PM
- Full moon
- Oct 25
- New moon
- Nov 9
