Observed 10:00 AM CDT at KARR

Dayton, IL weather

Sunny and 57°14°, 13°7° warmer than a typical Oct 24.

Mostly agree

Now 57°14°

Sunny

Wind: 5 mph7 km/h; From the southeast. About 5 mph8 km/h through 10 PM
Dew point: 48°9°; Comfortable
UV index: 2Low; Moderate 12–4 PM · peak 4
Pressure: 30.42 inHg1030 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (52°11° then, 52°11° now)

Good hours for

High 73°23° today at 3 PM
Below 60°16° tonight after 9 PM
Low 49°9° tomorrow at 7 AM
Above 60°16° tomorrow by 10 AM

This morningUp to 64°18° by 11 AM · Mostly cloudy
This afternoonUp to 73°23° by 3 PM · Partly cloudy
TonightDown to 50°10° by 5 AM · Partly cloudy
Tomorrow morningUp to 66°19° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 76°24° by 3 PM · Mostly cloudy
Tomorrow nightDown to 51°11° by 5 AM · Mostly cloudy
Monday morningUp to 56°13° by 9 AM · 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 10a	Cloudy	60°16° (likely 55°13° to 60°16°)	60°16°	0%	5 mph8 km/h from SSE, gusts 11 mph18 km/h	63%	80%	2
Sat 11a	Cloudy	64°18° (likely 59°15° to 65°18°)	64°18°	0%	5 mph8 km/h from S, gusts 12 mph19 km/h	54%	82%	2
Sat 12p	Cloudy	68°20° (likely 64°18° to 68°20°)	68°20°	0%	5 mph8 km/h from S, gusts 11 mph17 km/h	48%	80%	3
Sat 1p	Sunny	71°22° (likely 67°19° to 71°22°)	71°22°	0%	5 mph8 km/h from S, gusts 10 mph16 km/h	42%	47%	4
Sat 2p	Partly sunny	72°22° (likely 69°21° to 72°22°)	72°22°	0%	5 mph8 km/h from S, gusts 9 mph15 km/h	39%	52%	3
Sat 3p	Mostly cloudy	73°23° (likely 70°21° to 73°23°)	73°23°	0%	5 mph8 km/h from S, gusts 9 mph15 km/h	37%	49%	3
Sat 4p	Mostly cloudy	73°23° (likely 69°21° to 73°23°)	73°23°	0%	5 mph8 km/h from SSE, gusts 10 mph15 km/h	37%	48%	2
Sat 5p	Cloudy	72°22° (likely 66°19° to 72°22°)	72°22°	0%	5 mph8 km/h from SSE, gusts 10 mph16 km/h	40%	74%	1
Sat 6p	Cloudy	68°20° (likely 62°17° to 68°20°)	68°20°	0%	5 mph8 km/h from SSE, gusts 8 mph13 km/h	45%	67%	0
Sat 7p	Partly cloudy	64°18° (likely 59°15° to 64°18°)	64°18°	5%	5 mph8 km/h from SE, gusts 8 mph14 km/h	52%	46%	0
Sat 8p	Partly cloudy	61°16° (likely 57°14° to 61°16°)	61°16°	0%	5 mph8 km/h from SSE, gusts 10 mph16 km/h	58%	26%	0
Sat 9p	Clear	59°15° (likely 55°13° to 59°15°)	59°15°	0%	5 mph8 km/h from SSE, gusts 10 mph16 km/h	62%	4%	0
Sat 10p	Clear	58°14° (likely 53°12° to 58°14°)	58°14°	0%	5 mph8 km/h from SSE, gusts 10 mph17 km/h	65%	5%	0
Sat 11p	Clear	56°13° (likely 52°11° to 56°13°)	56°13°	0%	5 mph8 km/h from SSE, gusts 9 mph15 km/h	67%	6%	0
Sun 12a	Mostly clear	55°13° (likely 51°11° to 55°13°)	55°13°	0%	5 mph8 km/h from SSE, gusts 9 mph14 km/h	69%	28%	0
Sun 1a	Partly cloudy	54°12° (likely 50°10° to 54°12°)	54°12°	0%	5 mph8 km/h from S, gusts 10 mph15 km/h	71%	48%	0
Sun 2a	Partly cloudy	53°12° (likely 49°9° to 53°12°)	53°12°	0%	5 mph8 km/h from S, gusts 9 mph15 km/h	73%	54%	0
Sun 3a	Cloudy	52°11° (likely 49°9° to 52°11°)	52°11°	0%	5 mph8 km/h from S, gusts 9 mph14 km/h	75%	57%	0
Sun 4a	Cloudy	51°11° (likely 48°9° to 51°11°)	51°11°	0%	5 mph8 km/h from S, gusts 8 mph13 km/h	77%	76%	0
Sun 5a	Cloudy	50°10° (likely 47°8° to 50°10°)	50°10°	0%	5 mph8 km/h from S, gusts 7 mph12 km/h	78%	86%	0
Sun 6a	Cloudy	50°10° (likely 47°8° to 50°10°)	49°9°	0%	5 mph8 km/h from S, gusts 7 mph11 km/h	79%	89%	0
Sun 7a	Cloudy	49°9° (likely 46°8° to 49°9°)	49°9°	0%	0 mph0 km/h, gusts 7 mph11 km/h	84%	90%	0
Sun 8a	Cloudy	51°11° (likely 47°8° to 51°11°)	51°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	82%	87%	0
Sun 9a	Cloudy	56°13° (likely 52°11° to 56°13°)	56°13°	0%	5 mph8 km/h from S, gusts 5 mph9 km/h	70%	85%	1
Sun 10a	Cloudy	61°16° (likely 59°15° to 61°16°)	61°16°	0%	5 mph8 km/h from S, gusts 9 mph14 km/h	60%	80%	2
Sun 11a	Cloudy	66°19° (likely 63°17° to 67°19°)	66°19°	0%	5 mph8 km/h from S, gusts 11 mph17 km/h	51%	80%	2
Sun 12p	Cloudy	70°21° (likely 67°19° to 71°22°)	70°21°	0%	5 mph8 km/h from S, gusts 8 mph13 km/h	45%	80%	3
Sun 1p	Partly sunny	73°23° (likely 70°21° to 74°23°)	73°23°	0%	5 mph8 km/h from S, gusts 8 mph13 km/h	40%	62%	3
Sun 2p	Partly sunny	75°24° (likely 71°22° to 76°24°)	75°24°	0%	5 mph8 km/h from S, gusts 8 mph13 km/h	37%	54%	3
Sun 3p	Cloudy	76°24° (likely 72°22° to 76°24°)	76°24°	0%	5 mph8 km/h from S, gusts 7 mph12 km/h	36%	81%	3
Sun 4p	Cloudy	76°24° (likely 72°22° to 76°24°)	76°24°	0%	5 mph8 km/h from S, gusts 7 mph12 km/h	35%	82%	2
Sun 5p	Cloudy	74°23° (likely 69°21° to 74°23°)	74°23°	0%	0 mph0 km/h, gusts 6 mph10 km/h	39%	81%	1
Sun 6p	Cloudy	70°21° (likely 64°18° to 70°21°)	71°22°	0%	0 mph0 km/h, gusts 6 mph9 km/h	43%	76%	0
Sun 7p	Cloudy	66°19° (likely 61°16° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph10 km/h	50%	74%	0
Sun 8p	Cloudy	63°17° (likely 59°15° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 6 mph10 km/h	57%	75%	0
Sun 9p	Partly cloudy	61°16° (likely 57°14° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 5 mph9 km/h	62%	71%	0
Sun 10p	Cloudy	59°15° (likely 56°13° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 5 mph8 km/h	65%	77%	0
Sun 11p	Cloudy	57°14° (likely 54°12° to 59°15°)	57°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	68%	74%	0
Mon 12a	Cloudy	56°13° (likely 53°12° to 59°15°)	56°13°	0%	0 mph0 km/h, gusts 6 mph10 km/h	69%	73%	0
Mon 1a	Cloudy	55°13° (likely 52°11° to 58°14°)	55°13°	0%	0 mph0 km/h, gusts 6 mph9 km/h	71%	71%	0
Mon 2a	Cloudy	54°12° (likely 51°11° to 56°13°)	54°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	74%	87%	0
Mon 3a	Cloudy	53°12° (likely 51°11° to 54°12°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	76%	81%	0
Mon 4a	Cloudy	52°11° (likely 50°10° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 3 mph5 km/h	78%	66%	0
Mon 5a	Cloudy	51°11° (likely 49°9° to 52°11°)	51°11°	0%	0 mph0 km/h, gusts 6 mph10 km/h	82%	84%	0
Mon 6a	Cloudy	50°10° (likely 48°9° to 52°11°)	50°10°	0%	0 mph0 km/h, gusts 5 mph8 km/h	84%	81%	0
Mon 7a	Cloudy	50°10° (likely 47°8° to 52°11°)	50°10°	0%	0 mph0 km/h, gusts 6 mph9 km/h	85%	86%	0
Mon 8a	Cloudy	53°12° (likely 48°9° to 56°13°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	80%	89%	0
Mon 9a	Cloudy	56°13° (likely 52°11° to 58°14°)	56°13°	0%	0 mph0 km/h, gusts 6 mph10 km/h	72%	90%	1

Days ahead

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

Today, Oct 24. Cloudy. High 73°23°, low 49°9°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 64°18°
  Dry
2. Afternoon
  noon–6 PM
  Mostly cloudy, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Official NWS forecast
Today: Partly sunny, with a high near 73. South southeast wind around 5 mph, with gusts as high as 15 mph.
Tonight: Partly cloudy, with a low around 49. South southeast wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–73°23°
Low, likely
45°7°–49°9°
Typical high / low
60°16° / 40°4°
Wind
10 mph15 km/h, gusts 18 mph29 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 76°24°, low 50°10°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°11°
  Dry
Official NWS forecast
Day: Mostly sunny. High near 76, with temperatures falling to around 74 in the afternoon. South wind 0 to 5 mph.
Night: Mostly cloudy, with a low around 50. South southeast wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–76°24°
Low, likely
46°8°–50°10°
Typical high / low
60°16° / 40°4°
Wind
6 mph10 km/h, gusts 14 mph23 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 72°22°, low 49°9°. Typical 59°15° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 71°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 72. East northeast wind 0 to 5 mph, with gusts as high as 15 mph.
Night: Mostly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–73°23°
Low, likely
47°8°–51°11°
Typical high / low
59°15° / 39°4°
Wind
13 mph21 km/h, gusts 20 mph32 km/h
UV peak
3
Tuesday, Oct 27. Cloudy. High 72°22°, low 52°11°. Typical 59°15° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 72.
Night: Mostly cloudy, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–72°22°
Low, likely
48°9°–52°11°
Typical high / low
59°15° / 39°4°
Wind
11 mph18 km/h, gusts 23 mph37 km/h
UV peak
3
Wednesday, Oct 28. Partly sunny. High 75°24°, low 53°12°. Typical 58°14° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 63°17°
  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 75.
Night: Partly cloudy, with a low around 53.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–75°24°
Low, likely
53°12°–56°13°
Typical high / low
58°14° / 38°3°
Wind
12 mph19 km/h, gusts 25 mph40 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 72°22°, low 48°9°. Typical 58°14° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 60°15°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 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 sunny, with a high near 72.
Night: Partly cloudy, with a low around 48.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
70°21°–76°24°
Low, likely
48°9°–60°16°
Typical high / low
58°14° / 38°3°
Wind
12 mph19 km/h, gusts 27 mph43 km/h
UV peak
4
Friday, Oct 30. Showers. High 71°22°, low 50°10°. Typical 57°14° / 38°3°. Rain 0.02 in0.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers after 7am. Partly sunny, with a high near 71.
Night: A slight chance of rain showers. Mostly cloudy, with a low around 50.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
65°18°–78°26°
Low, likely
46°8°–59°15°
Typical high / low
57°14° / 38°3°
Wind
13 mph21 km/h, gusts 25 mph40 km/h
UV peak
3
Saturday, Oct 31. Cloudy. High 72°22°, low 57°14°. Typical 56°13° / 37°3°. Rain 0.1 in2.5 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 58°15°
  30% chance
2. Afternoon
  noon–6 PM
  Drizzle, 72°22°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 65°18°
  50% chance · 0.02 in0.6 mm
4. Overnight
  midnight–6 AM
  Drizzle, 62°17°
  50% chance · 0.05 in1.2 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°–78°26°
Low, likely
54°12°–60°16°
Typical high / low
56°13° / 37°3°
Wind
13 mph21 km/h, gusts 26 mph42 km/h
UV peak
3
Sunday, Nov 1. Showers. High 66°19°, low 59°15°. Typical 56°13° / 37°3°. Rain 0.6 in15 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 63°17°
  50% chance · 0.16 in4.1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 65°18°
  50% chance · 0.23 in5.8 mm
3. Evening
  6 PM–midnight
  Showers, 63°17°
  40% chance · 0.25 in6.3 mm
4. Overnight
  midnight–6 AM
  Showers, 58°15°
  40% chance · 0.05 in1.2 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
65°18°–68°20°
Low, likely
56°13°–61°16°
Typical high / low
56°13° / 37°3°
Wind
22 mph36 km/h, gusts 40 mph64 km/h
UV peak
2
Monday, Nov 2. Showers. High 62°17°, low 53°12°. Typical 56°13° / 37°3°. Rain 0.5 in13 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 59°15°
  40% chance · 0.04 in1 mm
2. Afternoon
  noon–6 PM
  Showers, 60°16°
  40% chance · 0.32 in8.2 mm
3. Evening
  6 PM–midnight
  Drizzle, 59°15°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
59°15°–67°19°
Low, likely
48°9°–62°17°
Typical high / low
56°13° / 37°3°
Wind
22 mph36 km/h, gusts 39 mph62 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 73°, low 49°.
Tomorrow
Dry, high 76°, low 50°, warming up.
Monday
Dry, high 72°, low 49°, cooling off.
Rest of week
Highs 62–75°; chance of precipitation on Sunday, Monday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (LOT) (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

Illinois River at Marseilles Lock (tailwater)

4.9 mi

Below flood stage

Level: 459 ft
Flow: 2,200 cfs

Forecast peak 459 ft Sat 1 PM

Reading from Sat 9:30 AM · NWS gauge page

Illinois River at Starved Rock Lock (tailwater)

11 mi

Below flood stage

Level: 442 ft
Flow: 4,730 cfs

Forecast peak 442 ft Sat 1 PM

Reading from Sat 9 AM · NWS gauge page

Illinois River near La Salle

17 mi

Below flood stage

Level: 11.6 ft
Flow: 5,970 cfs

Forecast peak 11.4 ft Sat 1 PM

Reading from Sat 9:45 AM · NWS gauge page

Illinois River at Morris

19 mi

Below flood stage

Level: 5.2 ft
Flow: 5,220 cfs

Forecast peak 5.1 ft Sat 1 PM

Reading from Sat 9:45 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 89% less heating than a typical week.

This week 13Typical 114

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 48°F).

Open the windows?

Today, 11:00 AM–8:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

Ottawa 4sw · official normals 1991–2020 · records 1890–2026

Oct 24, today vs a typical year

Today’s expected high is 13°7° warmer than typical.

Last 7 days vs normal

On average 2°1° warmer than normal (daily mean temperature).

−8°−4°SunOct 18
−2°−1°MonOct 19
+2°+1°TueOct 20
+5°+3°WedOct 21
+6°+3°ThuOct 22
+9°+5°FriOct 23
—SatOct 24

Dayton weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 43 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 32 min less
Golden hour: 5:22–6:18 PM; Morning 7:00–7:55 AM
Blue hour: 6:18–6:28 PM; Morning 6:49–7:00 AM; first light 6:49 AM

Stars tonight? Fair

Mostly clear 9 PM–12 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:30 AM · rises 4:58 PM
Full moon: Oct 25
New moon: Nov 9

Looking west from Dayton. A level horizon.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Dayton, IL weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Illinois River at Marseilles Lock (tailwater)

Illinois River at Starved Rock Lock (tailwater)

Illinois River near La Salle

Illinois River at Morris

For your home

Heating this week

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon