Observed 6:20 AM CDT at KDEC

Latham, IL weather

Clear and 45°7°, 12°7° warmer than a typical Oct 24.

Forecasts agree

Now 45°7°

Clear

Wind: 3 mph5 km/h; From the east-northeast. 35–7 mph11 km/h through 6 PM
Dew point: 43°6°; Comfortable · up to 51°11° by 10 AM
Humidity: 93%; Air 45°7°, dew point 43°6° · fog or dew likely
UV index: 0Low; Moderate 11 AM–3 PM · peak 4
Air quality: 51Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.37 inHg1028 hPa; Rising slowly · +0.04 inHg+1.3 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Above 60°16° today by 10 AM
High 74°23° today at 4 PM
Below 60°16° tonight after 8 PM

This morningUp to 66°19° by 11 AM · Partly cloudy
This afternoonUp to 74°23° by 4 PM · Mostly cloudy
TonightDown to 47°8° by 5 AM · Partly cloudy
Tomorrow morningUp to 67°19° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 76°24° by 4 PM · Mostly cloudy
Tomorrow nightDown to 49°9° 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 6a	Partly cloudy	49°9° (likely 46°8° to 49°9°)	47°8°	0%	5 mph8 km/h from SE, gusts 8 mph13 km/h	86%	39%	0
Sat 7a	Partly sunny	48°9° (likely 46°8° to 49°9°)	46°8°	0%	5 mph8 km/h from SE, gusts 8 mph14 km/h	89%	44%	0
Sat 8a	Partly sunny	50°10° (likely 46°8° to 51°11°)	48°9°	0%	6 mph10 km/h from SE, gusts 8 mph14 km/h	86%	46%	0
Sat 9a	Partly sunny	56°13° (likely 53°12° to 56°13°)	56°13°	0%	6 mph10 km/h from SSE, gusts 9 mph15 km/h	80%	69%	1
Sat 10a	Partly sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	7 mph11 km/h from SSE, gusts 11 mph18 km/h	69%	74%	1
Sat 11a	Cloudy	66°19° (likely 64°18° to 66°19°)	66°19°	0%	7 mph11 km/h from SSE, gusts 12 mph19 km/h	56%	70%	3
Sat 12p	Cloudy	69°21° (likely 68°20° to 69°21°)	69°21°	0%	7 mph11 km/h from SSE, gusts 9 mph15 km/h	49%	76%	4
Sat 1p	Cloudy	71°22° (likely 71°22° to 71°22°)	71°22°	0%	7 mph11 km/h from SSE, gusts 8 mph14 km/h	44%	79%	4
Sat 2p	Cloudy	73°23° (likely 72°22° to 73°23°)	73°23°	0%	7 mph11 km/h from SSE, gusts 8 mph13 km/h	40%	73%	3
Sat 3p	Partly sunny	73°23° (likely 72°22° to 73°23°)	73°23°	0%	7 mph11 km/h from SSE, gusts 8 mph14 km/h	38%	64%	2
Sat 4p	Partly sunny	74°23° (likely 72°22° to 74°23°)	74°23°	0%	7 mph11 km/h from SSE, gusts 9 mph14 km/h	35%	62%	1
Sat 5p	Cloudy	72°22° (likely 69°21° to 73°23°)	72°22°	0%	7 mph11 km/h from SSE, gusts 8 mph13 km/h	39%	66%	0
Sat 6p	Cloudy	69°21° (likely 64°18° to 69°21°)	69°21°	0%	6 mph10 km/h from SE, gusts 7 mph12 km/h	44%	72%	0
Sat 7p	Mostly clear	65°18° (likely 61°16° to 65°18°)	65°18°	0%	6 mph10 km/h from SE, gusts 7 mph11 km/h	52%	45%	0
Sat 8p	Mostly clear	59°15° (likely 59°15° to 60°16°)	59°15°	0%	6 mph10 km/h from SE, gusts 10 mph16 km/h	62%	23%	0
Sat 9p	Mostly clear	57°14° (likely 57°14° to 59°15°)	57°14°	0%	5 mph8 km/h from SE, gusts 11 mph18 km/h	67%	8%	0
Sat 10p	Clear	55°13° (likely 55°13° to 57°14°)	55°13°	0%	5 mph8 km/h from SE, gusts 11 mph18 km/h	69%	2%	0
Sat 11p	Clear	54°12° (likely 54°12° to 56°13°)	54°12°	0%	5 mph8 km/h from SE, gusts 12 mph19 km/h	71%	4%	0
Sun 12a	Clear	52°11° (likely 52°11° to 55°13°)	52°11°	0%	3 mph5 km/h from SE, gusts 11 mph17 km/h	77%	26%	0
Sun 1a	Mostly clear	51°11° (likely 51°11° to 54°12°)	51°11°	0%	3 mph5 km/h from SE, gusts 10 mph17 km/h	80%	31%	0
Sun 2a	Mostly clear	50°10° (likely 50°10° to 53°12°)	49°9°	0%	3 mph5 km/h from SE, gusts 10 mph16 km/h	80%	67%	0
Sun 3a	Cloudy	49°9° (likely 49°9° to 52°11°)	48°9°	0%	3 mph5 km/h from SE, gusts 10 mph16 km/h	83%	68%	0
Sun 4a	Cloudy	48°9° (likely 48°9° to 52°11°)	47°8°	0%	3 mph5 km/h from SE, gusts 10 mph15 km/h	86%	77%	0
Sun 5a	Cloudy	47°8° (likely 47°8° to 51°11°)	46°8°	0%	3 mph5 km/h from SE, gusts 8 mph12 km/h	89%	74%	0
Sun 6a	Mostly clear	47°8° (likely 47°8° to 50°10°)	47°8°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	89%	85%	0
Sun 7a	Mostly sunny	46°8° (likely 46°8° to 50°10°)	46°8°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	89%	67%	0
Sun 8a	Mostly sunny	48°9° (likely 47°8° to 52°11°)	47°8°	0%	3 mph5 km/h from SSE, gusts 6 mph10 km/h	89%	69%	0
Sun 9a	Mostly sunny	53°12° (likely 53°12° to 56°13°)	53°12°	0%	3 mph5 km/h from SSE, gusts 8 mph12 km/h	83%	69%	1
Sun 10a	Cloudy	61°16° (likely 60°16° to 62°17°)	61°16°	0%	5 mph8 km/h from SSE, gusts 10 mph15 km/h	67%	73%	2
Sun 11a	Cloudy	67°19° (likely 66°19° to 67°19°)	67°19°	0%	5 mph8 km/h from SSE, gusts 9 mph14 km/h	54%	75%	3
Sun 12p	Cloudy	70°21° (likely 69°21° to 71°22°)	70°21°	0%	3 mph5 km/h from S, gusts 8 mph12 km/h	49%	77%	3
Sun 1p	Cloudy	73°23° (likely 72°22° to 74°23°)	73°23°	0%	3 mph5 km/h from S, gusts 8 mph12 km/h	43%	79%	4
Sun 2p	Cloudy	74°23° (likely 74°23° to 75°24°)	74°23°	0%	3 mph5 km/h from S, gusts 7 mph11 km/h	40%	79%	4
Sun 3p	Cloudy	75°24° (likely 74°23° to 76°24°)	75°24°	0%	3 mph5 km/h from S, gusts 6 mph9 km/h	38%	79%	3
Sun 4p	Cloudy	76°24° (likely 74°23° to 76°24°)	76°24°	0%	3 mph5 km/h from S, gusts 6 mph9 km/h	36%	80%	2
Sun 5p	Cloudy	74°23° (likely 71°22° to 74°23°)	74°23°	0%	3 mph5 km/h from SSE, gusts 5 mph7 km/h	41%	79%	1
Sun 6p	Cloudy	71°22° (likely 66°19° to 71°22°)	71°22°	0%	2 mph3 km/h from SSE, gusts 5 mph8 km/h	44%	72%	0
Sun 7p	Partly cloudy	66°19° (likely 63°17° to 67°19°)	66°19°	0%	2 mph3 km/h from SE, gusts 6 mph9 km/h	52%	75%	0
Sun 8p	Cloudy	60°16° (likely 60°16° to 64°18°)	60°16°	0%	2 mph3 km/h from SSE, gusts 7 mph11 km/h	64%	64%	0
Sun 9p	Cloudy	58°14° (likely 58°14° to 60°16°)	58°14°	0%	1 mph2 km/h from SSE, gusts 7 mph12 km/h	69%	62%	0
Sun 10p	Cloudy	56°13° (likely 56°13° to 58°14°)	56°13°	0%	1 mph2 km/h from SSE, gusts 8 mph12 km/h	72%	62%	0
Sun 11p	Cloudy	55°13° (likely 55°13° to 58°14°)	55°13°	0%	1 mph2 km/h from SSE, gusts 7 mph11 km/h	74%	70%	0
Mon 12a	Cloudy	53°12° (likely 53°12° to 58°14°)	53°12°	0%	0 mph0 km/h, gusts 6 mph10 km/h	77%	84%	0
Mon 1a	Cloudy	52°11° (likely 52°11° to 58°14°)	52°11°	0%	0 mph0 km/h, gusts 6 mph9 km/h	80%	93%	0
Mon 2a	Cloudy	52°11° (likely 52°11° to 60°16°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	80%	85%	0
Mon 3a	Cloudy	51°11° (likely 51°11° to 60°16°)	51°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	83%	84%	0
Mon 4a	Cloudy	50°10° (likely 50°10° to 58°14°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	86%	84%	0
Mon 5a	Mostly cloudy	49°9° (likely 49°9° to 58°14°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	86%	66%	0

Days ahead

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

Today, Oct 24. Cloudy. High 74°23°, low 46°8°. Typical 62°17° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Partly sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 74. Southeast wind around 7 mph.
Tonight: Mostly clear, with a low around 46. Southeast wind around 6 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
72°22°–74°23°
Low, likely
46°8°–49°9°
Typical high / low
62°17° / 43°6°
Wind
9 mph15 km/h, gusts 17 mph27 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 76°24°, low 48°9°. Typical 61°16° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°9°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 76. South southeast wind around 5 mph.
Night: Mostly cloudy, with a low around 48. South southeast wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
74°23°–76°24°
Low, likely
47°8°–50°10°
Typical high / low
61°16° / 42°6°
Wind
8 mph13 km/h, gusts 15 mph25 km/h
UV peak
4
Monday, Oct 26. Mostly cloudy. High 76°24°, low 49°9°. Typical 60°16° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 53°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 76. South southeast wind 0 to 3 mph.
Night: Mostly cloudy, with a low around 49. East southeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–76°24°
Low, likely
49°9°–55°13°
Typical high / low
60°16° / 42°6°
Wind
6 mph10 km/h
UV peak
3
Tuesday, Oct 27. Cloudy. High 74°23°, low 51°11°. Typical 60°16° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  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, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 74. South southeast wind 3 to 7 mph.
Night: Mostly cloudy, with a low around 51.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
71°22°–74°23°
Low, likely
49°9°–56°13°
Typical high / low
60°16° / 42°6°
Wind
10 mph16 km/h, gusts 22 mph35 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 78°26°, low 52°11°. Typical 60°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 64°18°
  Dry
4. 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 78.
Night: Mostly clear, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–78°26°
Low, likely
52°11°–56°13°
Typical high / low
60°16° / 41°5°
Wind
12 mph19 km/h, gusts 22 mph36 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 76°24°, low 48°9°. Typical 59°15° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 76.
Night: Partly cloudy, with a low around 48.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
73°23°–79°26°
Low, likely
48°9°–59°15°
Typical high / low
59°15° / 41°5°
Wind
13 mph21 km/h, gusts 28 mph46 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 74°23°, low 50°10°. Typical 58°14° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 65°18°
  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 74.
Night: A slight chance of rain showers after 1am. Mostly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–78°26°
Low, likely
50°10°–58°14°
Typical high / low
58°14° / 41°5°
Wind
12 mph19 km/h, gusts 29 mph46 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 73°23°, low 60°16°. Typical 58°14° / 40°4°. Rain 0.07 in1.8 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 62°17°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 73°23°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 68°20°
  40% chance
4. Overnight
  midnight–6 AM
  Cloudy, 65°18°
  40% 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
70°21°–80°27°
Low, likely
57°14°–62°17°
Typical high / low
58°14° / 40°4°
Wind
13 mph21 km/h, gusts 29 mph47 km/h
UV peak
2
Sunday, Nov 1. Showers. High 69°21°, low 62°17°. Typical 57°14° / 40°4°. Rain 0.55 in14 mm, 50% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Drizzle, 66°19°
  50% chance · 0.13 in3.2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 67°20°
  50% chance · 0.19 in4.9 mm
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  40% chance · 0.17 in4.2 mm
4. Overnight
  midnight–6 AM
  Drizzle, 58°15°
  40% chance · 0.1 in2.6 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 agreeIndependent forecasts are close; the range is narrow.
High, likely
69°21°–70°21°
Low, likely
60°16°–64°18°
Typical high / low
57°14° / 40°4°
Wind
24 mph38 km/h, gusts 42 mph68 km/h
UV peak
1
Monday, Nov 2. Rain. High 65°18°, low 57°14°. Typical 57°14° / 40°4°. Rain 0.64 in16 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 59°15°
  30% chance · 0.12 in2.9 mm
2. Afternoon
  noon–6 PM
  Rain, 61°16°
  30% chance · 0.4 in10.1 mm
3. Evening
  6 PM–midnight
  Rain, 62°16°
  30% chance · 0.15 in3.9 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
60°16°–70°21°
Low, likely
48°9°–65°18°
Typical high / low
57°14° / 40°4°
Wind
25 mph40 km/h, gusts 36 mph57 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 74°, low 46°.
Tomorrow
Dry, high 76°, low 48°.
Monday
Dry, high 76°, low 49°.
Rest of week
Highs 65–78°; chance of precipitation on Sunday, Monday.

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

Salt Creek (IL) near Rowell

12 mi

Below flood stage

Level: 9.1 ft
Flow: 19 cfs

Reading from Sat 5:30 AM · NWS gauge page

Lake Fork (Central IL) near Cornland

12 mi

Level: 3.3 ft
Flow: 7 cfs

Reading from Sat 5:30 AM · NWS gauge page

Sangamon River at Decatur

14 mi

Level: 1.8 ft
Flow: under 1 cfs

Reading from Sat 4:45 AM · NWS gauge page

Kickapoo Creek at Waynesville

20 mi

Level: 2.4 ft
Flow: 15 cfs

Reading from Sat 5:15 AM · 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 15Typical 99

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 3
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at.

Comfort

Dry air outside (dew point 43°F).

Open the windows?

Today, 10:00 AM–7:00 PM

Good stretch to open the windows.

Is this typical?

DECATUR WTP · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 12°7° warmer than typical.

Last 7 days vs normal

—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 47 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 27 min less
Golden hour: 5:26–6:21 PM; Morning 6:59–7:54 AM
Blue hour: 6:21–6:31 PM; Morning 6:49–6:59 AM; first light 6:49 AM

Stars tonight? Fair

Mostly clear 8 PM–12 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:31 AM · rises 5:01 PM
Full moon: Oct 25
New moon: Nov 9

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