Observed 6:54 AM CDT at KSUS

Byrnes Mill, MO weather

Foggy and 45°7°.

Forecasts agree

Now 45°7°

Fog

Wind: Calm; Light through 7 PM
Dew point: 44°7°; Comfortable
Humidity: 97%; Air 45°7°, dew point 44°7° · fog or dew likely
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air quality: 68Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.33 inHg1027 hPa; Rising slowly · +0.04 inHg+1.4 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 (44°7° then, 45°7° now)

Good hours for

Fog today 8–9 AM
Above 60°16° today by 10 AM
High 76°24° today at 4 PM
Below 60°16° tonight after 9 PM

This morningUp to 66°19° by 11 AM · Mostly cloudy
This afternoonUp to 76°24° by 4 PM · Partly cloudy
TonightDown to 49°9° by 5 AM · Partly cloudy
Tomorrow morningUp to 70°21° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 78°26° by 4 PM · Mostly cloudy
Tomorrow nightDown to 50°10° by 5 AM · 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 7a	Mostly sunny	48°9° (likely 47°8° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	86%	23%	0
Sat 8a	Fog	50°10° (likely 48°9° to 53°12°)	50°10°	0%	1 mph2 km/h from SE, gusts 5 mph7 km/h	86%	59%	0
Sat 9a	Cloudy	52°11° (likely 52°11° to 57°14°)	52°11°	0%	1 mph2 km/h from SE, gusts 7 mph11 km/h	86%	69%	1
Sat 10a	Cloudy	60°16° (likely 60°16° to 64°18°)	60°16°	0%	2 mph3 km/h from SE, gusts 8 mph13 km/h	72%	76%	2
Sat 11a	Cloudy	66°19° (likely 65°18° to 68°20°)	66°19°	0%	2 mph3 km/h from SE, gusts 8 mph13 km/h	58%	76%	3
Sat 12p	Cloudy	70°21° (likely 69°21° to 72°22°)	70°21°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	49%	79%	4
Sat 1p	Cloudy	73°23° (likely 71°22° to 74°23°)	73°23°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	43%	79%	4
Sat 2p	Cloudy	74°23° (likely 73°23° to 75°24°)	74°23°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	43%	63%	4
Sat 3p	Partly sunny	75°24° (likely 74°23° to 76°24°)	75°24°	0%	2 mph3 km/h from SE, gusts 7 mph12 km/h	40%	66%	4
Sat 4p	Sunny	76°24° (likely 73°23° to 76°24°)	76°24°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	39%	11%	2
Sat 5p	Partly sunny	74°23° (likely 71°22° to 74°23°)	74°23°	0%	2 mph3 km/h from E, gusts 9 mph14 km/h	43%	49%	1
Sat 6p	Partly cloudy	71°22° (likely 67°19° to 71°22°)	71°22°	0%	2 mph3 km/h from E, gusts 8 mph13 km/h	47%	47%	0
Sat 7p	Partly cloudy	66°19° (likely 63°17° to 66°19°)	66°19°	0%	2 mph3 km/h from E, gusts 8 mph13 km/h	54%	47%	0
Sat 8p	Partly cloudy	60°16° (likely 60°16° to 63°17°)	60°16°	0%	1 mph2 km/h from E, gusts 9 mph14 km/h	64%	45%	0
Sat 9p	Partly cloudy	58°14° (likely 58°14° to 62°17°)	58°14°	0%	1 mph2 km/h from SE, gusts 8 mph14 km/h	69%	45%	0
Sat 10p	Partly cloudy	57°14° (likely 57°14° to 60°16°)	57°14°	0%	1 mph2 km/h from SE, gusts 8 mph13 km/h	69%	45%	0
Sat 11p	Partly cloudy	55°13° (likely 55°13° to 59°15°)	55°13°	0%	1 mph2 km/h from SE, gusts 7 mph12 km/h	72%	49%	0
Sun 12a	Cloudy	54°12° (likely 54°12° to 58°14°)	54°12°	0%	0 mph0 km/h, gusts 6 mph10 km/h	74%	57%	0
Sun 1a	Cloudy	53°12° (likely 53°12° to 57°14°)	53°12°	0%	0 mph0 km/h, gusts 6 mph9 km/h	77%	60%	0
Sun 2a	Partly cloudy	52°11° (likely 52°11° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 6 mph9 km/h	77%	57%	0
Sun 3a	Mostly clear	51°11° (likely 51°11° to 56°13°)	51°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	80%	48%	0
Sun 4a	Partly cloudy	50°10° (likely 50°10° to 55°13°)	50°10°	0%	0 mph0 km/h, gusts 4 mph7 km/h	83%	38%	0
Sun 5a	Mostly clear	49°9° (likely 49°9° to 55°13°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	83%	57%	0
Sun 6a	Mostly clear	49°9° (likely 49°9° to 54°12°)	49°9°	0%	0 mph0 km/h, gusts 3 mph4 km/h	83%	55%	0
Sun 7a	Cloudy	48°9° (likely 48°9° to 53°12°)	48°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	83%	75%	0
Sun 8a	Cloudy	47°8° (likely 47°8° to 54°12°)	47°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	80%	0
Sun 9a	Cloudy	53°12° (likely 53°12° to 59°15°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	86%	78%	1
Sun 10a	Partly sunny	64°18° (likely 63°17° to 66°19°)	64°18°	0%	0 mph0 km/h, gusts 6 mph9 km/h	67%	72%	2
Sun 11a	Partly sunny	70°21° (likely 67°19° to 71°22°)	70°21°	0%	1 mph2 km/h from S, gusts 6 mph9 km/h	55%	69%	3
Sun 12p	Cloudy	73°23° (likely 71°22° to 74°23°)	73°23°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	48%	79%	4
Sun 1p	Cloudy	76°24° (likely 74°23° to 77°25°)	76°24°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	43%	78%	4
Sun 2p	Cloudy	77°25° (likely 75°24° to 79°26°)	77°25°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	42%	79%	4
Sun 3p	Cloudy	77°25° (likely 76°24° to 79°26°)	77°25°	0%	1 mph2 km/h from SE, gusts 3 mph5 km/h	42%	79%	3
Sun 4p	Cloudy	78°26° (likely 75°24° to 79°26°)	78°26°	0%	1 mph2 km/h from SE, gusts 3 mph5 km/h	40%	79%	2
Sun 5p	Cloudy	77°25° (likely 73°23° to 78°26°)	77°25°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	43%	79%	1
Sun 6p	Cloudy	74°23° (likely 69°21° to 74°23°)	74°23°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	48%	80%	0
Sun 7p	Cloudy	69°21° (likely 66°19° to 69°21°)	69°21°	0%	1 mph2 km/h from E, gusts 7 mph11 km/h	55%	75%	0
Sun 8p	Cloudy	63°17° (likely 63°17° to 67°19°)	63°17°	0%	0 mph0 km/h, gusts 7 mph12 km/h	67%	77%	0
Sun 9p	Cloudy	60°16° (likely 60°16° to 65°18°)	60°16°	0%	0 mph0 km/h, gusts 8 mph12 km/h	75%	73%	0
Sun 10p	Cloudy	59°15° (likely 59°15° to 64°18°)	59°15°	0%	0 mph0 km/h, gusts 8 mph13 km/h	75%	76%	0
Sun 11p	Cloudy	57°14° (likely 57°14° to 62°17°)	57°14°	0%	0 mph0 km/h, gusts 7 mph12 km/h	77%	79%	0
Mon 12a	Cloudy	56°13° (likely 56°13° to 61°16°)	56°13°	0%	0 mph0 km/h, gusts 6 mph10 km/h	80%	86%	0
Mon 1a	Cloudy	55°13° (likely 55°13° to 60°16°)	55°13°	0%	0 mph0 km/h, gusts 5 mph9 km/h	80%	89%	0
Mon 2a	Cloudy	54°12° (likely 54°12° to 59°15°)	54°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	80%	93%	0
Mon 3a	Cloudy	53°12° (likely 53°12° to 58°14°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	83%	95%	0
Mon 4a	Cloudy	52°11° (likely 52°11° to 58°14°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	83%	92%	0
Mon 5a	Cloudy	50°10° (likely 50°10° to 58°14°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	86%	96%	0
Mon 6a	Cloudy	49°9° (likely 49°9° to 58°14°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	97%	0

Days ahead

Tap a day for its hours and the official wording.

Today, Oct 24. Fog. High 76°24°, low 47°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 49°9°
  Dry
Official NWS forecast
Today: Patchy fog before 9am. Sunny, with a high near 76. Southeast wind 0 to 3 mph.
Tonight: Partly cloudy, with a low around 47. Southeast wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
74°23°–76°24°
Low, likely
47°8°–51°11°
Wind
8 mph12 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 79°26°, low 49°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  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, 50°10°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 79. Southeast wind around 1 mph.
Night: Mostly cloudy, with a low around 49. Southeast wind around 1 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
76°24°–79°26°
Low, likely
49°9°–53°12°
Wind
6 mph10 km/h, gusts 12 mph19 km/h
UV peak
4
Monday, Oct 26. Cloudy. High 78°26°, low 49°9°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 56°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 78. South wind around 1 mph.
Night: Mostly cloudy, with a low around 49.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
75°24°–78°26°
Low, likely
49°9°–57°14°
Wind
6 mph10 km/h, gusts 12 mph19 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 75°24°, low 50°10°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  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 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
71°22°–75°24°
Low, likely
50°10°–55°13°
Wind
7 mph11 km/h, gusts 22 mph35 km/h
UV peak
3
Wednesday, Oct 28. Cloudy. High 79°26°, low 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 65°18°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 58°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 52.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
76°24°–79°26°
Low, likely
52°11°–57°14°
Wind
8 mph13 km/h, gusts 21 mph33 km/h
UV peak
4
Thursday, Oct 29. Mostly sunny. High 78°26°, low 50°10°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 60°15°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 79°26°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 67°19°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 56°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 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
77°25°–80°27°
Low, likely
50°10°–59°15°
Wind
8 mph12 km/h, gusts 27 mph43 km/h
UV peak
3
Friday, Oct 30. Partly sunny. High 77°25°, low 51°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 59°15°
  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, 59°15°
  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 51. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
76°24°–80°27°
Low, likely
51°11°–59°15°
Wind
8 mph12 km/h, gusts 19 mph30 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 73°23°, low 61°16°. Rain 0.11 in2.8 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 63°17°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 74°24°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 69°20°
  30% chance · 0.02 in0.4 mm
4. Overnight
  midnight–6 AM
  Cloudy, 66°19°
  50% chance · 0.1 in2.4 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
70°21°–79°26°
Low, likely
58°14°–63°17°
Wind
10 mph16 km/h, gusts 23 mph37 km/h
UV peak
2
Sunday, Nov 1. Showers. High 72°22°, low 63°17°. Rain 0.53 in13 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 65°18°
  50% chance · 0.13 in3.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 69°21°
  40% chance · 0.16 in4.2 mm
3. Evening
  6 PM–midnight
  Drizzle, 67°19°
  40% chance · 0.08 in2 mm
4. Overnight
  midnight–6 AM
  Drizzle, 59°15°
  40% chance · 0.09 in2.4 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–74°23°
Low, likely
60°16°–65°18°
Wind
13 mph22 km/h, gusts 38 mph61 km/h
Monday, Nov 2. Drizzle. High 67°19°, low 58°14°. Rain 0.39 in9.9 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 60°16°
  40% chance · 0.15 in3.7 mm
2. Afternoon
  noon–6 PM
  Drizzle, 61°16°
  30% chance · 0.2 in5.1 mm
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  30% chance · 0.08 in2 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°–73°23°
Low, likely
47°8°–67°19°
Wind
16 mph26 km/h, gusts 36 mph58 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 76°, low 47°.
Tomorrow
Dry, high 79°, low 49°, warming up.
Monday
Dry, high 78°, low 49°.
Rest of week
Highs 67–79°; 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

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Missouri River at St. Charles

25 mi

Below flood stage

Level: 12.3 ft
Flow: 64,700 cfs

Forecast peak 12.3 ft Sat 1 PM

Reading from Sat 6:30 AM · NWS gauge page

Meramec River near Eureka

4.6 mi

Below flood stage

Level: 2.7 ft
Flow: 505 cfs

Reading from Sat 6:30 AM · NWS gauge page

Big River at Byrnesville

4.8 mi

Below flood stage

Level: 1.7 ft
Flow: 121 cfs

Reading from Sat 6:45 AM · NWS gauge page

Meramec River at Valley Park

8.8 mi

Below flood stage

Level: -2.9 ft

Reading from Sat 6:30 AM · NWS gauge page

Sun & moon

Sun

Daylight: 10 h 51 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 22 min less
Golden hour: 5:35–6:28 PM; Morning 7:03–7:57 AM
Blue hour: 6:28–6:38 PM; Morning 6:53–7:03 AM; first light 6:53 AM

Stars tonight? Poor

Clouds most of the night (about 50% cover).

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:35 AM · rises 5:09 PM
Full moon: Oct 25
New moon: Nov 9

Looking north from Byrnes Mill.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Byrnes Mill, MO weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Missouri River at St. Charles

Meramec River near Eureka

Big River at Byrnesville

Meramec River at Valley Park

Sun & moon

Sun

Stars tonight? Poor

Moon