Sangamon River at Decatur
8.5 mi- Level
- 1.8 ft
- Flow
- under 1 cfs
Reading from Fri 11:45 PM · NWS gauge page
Observed 12:20 AM CDT at KDEC
Macon, IL weather
Clear and 46°8°, 12°7° warmer than a typical Oct 24.
Today: low 45°7° (likely 45°7° to 50°10°), high 74°23° (likely 72°22° to 74°23°).
Now 46°8°
Clear
- Wind
- Calm
- Up to 6 mph10 km/h through 12 PM
- Dew point
- 43°6°
- Comfortable · up to 52°11° by 10 AM
- UV index
- 0Low
- Moderate 11 AM–4 PM · peak 4
- Air quality
- 55Moderate
- Main pollutant: PM2.5 (fine particles)
- Pressure
- 30.31 inHg1026 hPa
- Rising slowly · +0.02 inHg+0.8 hPa next 3 h
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
Good hours for
TonightDown to 45°7° by 3 AM · Clear
This morningUp to 65°18° by 11 AM · Mostly cloudy
This afternoonUp to 74°23° by 4 PM · Mostly cloudy
TonightDown to 48°9° by 5 AM · Partly cloudy
Tomorrow morningUp to 67°19° by 11 AM · Partly cloudy
Tomorrow afternoonUp to 76°24° by 2 PM · Mostly cloudy
Tomorrow nightDown to 56°13° by 11 PM · Mostly cloudy
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 12a | Clear | 49°9° (likely 49°9° to 55°13°) | 47°8° | 0% | 5 mph8 km/h from SE, gusts 11 mph18 km/h | 83% | 6% | 0 |
| Sat 1a | Clear | 47°8° (likely 47°8° to 54°12°) | 45°7° | 0% | 5 mph8 km/h from SE, gusts 11 mph18 km/h | 89% | 7% | 0 |
| Sat 2a | Clear | 46°8° (likely 46°8° to 53°12°) | 44°7° | 0% | 5 mph8 km/h from SE, gusts 10 mph17 km/h | 93% | 6% | 0 |
| Sat 3a | Clear | 45°7° (likely 45°7° to 52°11°) | 43°6° | 0% | 5 mph8 km/h from SE, gusts 11 mph18 km/h | 96% | 11% | 0 |
| Sat 4a | Clear | 46°8° (likely 46°8° to 51°11°) | 43°6° | 0% | 5 mph8 km/h from SE, gusts 11 mph17 km/h | 96% | 20% | 0 |
| Sat 5a | Clear | 48°9° (likely 47°8° to 50°10°) | 46°8° | 0% | 5 mph8 km/h from ESE, gusts 10 mph16 km/h | 93% | 25% | 0 |
| Sat 6a | Partly cloudy | 47°8° (likely 47°8° to 50°10°) | 45°7° | 0% | 5 mph8 km/h from ESE, gusts 9 mph15 km/h | 96% | 41% | 0 |
| Sat 7a | Partly sunny | 47°8° (likely 46°8° to 50°10°) | 45°7° | 0% | 5 mph8 km/h from SE, gusts 9 mph15 km/h | 96% | 43% | 0 |
| Sat 8a | Cloudy | 49°9° (likely 47°8° to 51°11°) | 47°8° | 0% | 6 mph10 km/h from SE, gusts 10 mph16 km/h | 93% | 71% | 0 |
| Sat 9a | Cloudy | 53°12° (likely 53°12° to 55°13°) | 53°12° | 0% | 6 mph10 km/h from SE, gusts 10 mph16 km/h | 89% | 71% | 1 |
| Sat 10a | Partly sunny | 60°16° (likely 59°15° to 61°16°) | 60°16° | 0% | 6 mph10 km/h from SSE, gusts 11 mph17 km/h | 75% | 65% | 2 |
| Sat 11a | Cloudy | 65°18° (likely 64°18° to 67°19°) | 65°18° | 0% | 6 mph10 km/h from SSE, gusts 10 mph16 km/h | 63% | 77% | 3 |
| Sat 12p | Cloudy | 68°20° (likely 67°19° to 71°22°) | 68°20° | 0% | 6 mph10 km/h from SSE, gusts 9 mph14 km/h | 53% | 79% | 4 |
| Sat 1p | Partly sunny | 71°22° (likely 70°21° to 73°23°) | 71°22° | 0% | 6 mph10 km/h from SSE, gusts 8 mph12 km/h | 46% | 61% | 4 |
| Sat 2p | Cloudy | 72°22° (likely 72°22° to 74°23°) | 72°22° | 0% | 5 mph8 km/h from SSE, gusts 8 mph13 km/h | 41% | 67% | 4 |
| Sat 3p | Partly sunny | 73°23° (likely 72°22° to 74°23°) | 73°23° | 0% | 5 mph8 km/h from SE, gusts 8 mph13 km/h | 40% | 76% | 3 |
| Sat 4p | Cloudy | 74°23° (likely 71°22° to 74°23°) | 74°23° | 0% | 5 mph8 km/h from SE, gusts 8 mph13 km/h | 37% | 79% | 2 |
| Sat 5p | Mostly sunny | 72°22° (likely 69°21° to 72°22°) | 72°22° | 0% | 5 mph8 km/h from SE, gusts 8 mph13 km/h | 41% | 68% | 1 |
| Sat 6p | Cloudy | 69°21° (likely 64°18° to 69°21°) | 69°21° | 0% | 5 mph8 km/h from SE, gusts 9 mph14 km/h | 47% | 78% | 0 |
| Sat 7p | Cloudy | 64°18° (likely 61°16° to 64°18°) | 64°18° | 0% | 5 mph8 km/h from ESE, gusts 9 mph15 km/h | 56% | 68% | 0 |
| Sat 8p | Mostly clear | 58°14° (likely 58°14° to 62°17°) | 58°14° | 0% | 5 mph8 km/h from SE, gusts 11 mph18 km/h | 67% | 58% | 0 |
| Sat 9p | Mostly clear | 56°13° (likely 56°13° to 60°16°) | 56°13° | 0% | 5 mph8 km/h from SE, gusts 11 mph18 km/h | 72% | 51% | 0 |
| Sat 10p | Clear | 55°13° (likely 55°13° to 59°15°) | 55°13° | 0% | 3 mph5 km/h from SE, gusts 11 mph18 km/h | 74% | 45% | 0 |
| Sat 11p | Clear | 54°12° (likely 54°12° to 57°14°) | 54°12° | 0% | 3 mph5 km/h from SE, gusts 11 mph18 km/h | 77% | 41% | 0 |
| Sun 12a | Mostly clear | 52°11° (likely 52°11° to 57°14°) | 52°11° | 0% | 3 mph5 km/h from SE, gusts 11 mph18 km/h | 83% | 26% | 0 |
| Sun 1a | Mostly clear | 51°11° (likely 51°11° to 55°13°) | 51°11° | 0% | 3 mph5 km/h from SE, gusts 11 mph18 km/h | 83% | 48% | 0 |
| Sun 2a | Mostly clear | 50°10° (likely 50°10° to 54°12°) | 49°9° | 0% | 3 mph5 km/h from SE, gusts 11 mph17 km/h | 86% | 48% | 0 |
| Sun 3a | Mostly clear | 49°9° (likely 49°9° to 53°12°) | 48°9° | 0% | 3 mph5 km/h from SE, gusts 10 mph17 km/h | 89% | 54% | 0 |
| Sun 4a | Partly cloudy | 49°9° (likely 49°9° to 52°11°) | 48°9° | 0% | 3 mph5 km/h from SE, gusts 10 mph16 km/h | 89% | 46% | 0 |
| Sun 5a | Mostly clear | 48°9° (likely 48°9° to 51°11°) | 47°8° | 0% | 3 mph5 km/h from SE, gusts 10 mph15 km/h | 89% | 34% | 0 |
| Sun 6a | Mostly clear | 48°9° (likely 48°9° to 50°10°) | 47°8° | 0% | 3 mph5 km/h from SE, gusts 8 mph13 km/h | 89% | 43% | 0 |
| Sun 7a | Partly sunny | 47°8° (likely 47°8° to 50°10°) | 46°8° | 0% | 3 mph5 km/h from SSE, gusts 8 mph13 km/h | 93% | 34% | 0 |
| Sun 8a | Partly sunny | 49°9° (likely 48°9° to 51°11°) | 48°9° | 0% | 3 mph5 km/h from SE, gusts 8 mph13 km/h | 89% | 32% | 0 |
| Sun 9a | Partly sunny | 54°12° (likely 54°12° to 57°14°) | 54°12° | 0% | 3 mph5 km/h from SSE, gusts 9 mph14 km/h | 83% | 65% | 1 |
| Sun 10a | Partly sunny | 62°17° (likely 62°17° to 63°17°) | 62°17° | 0% | 3 mph5 km/h from SSE, gusts 9 mph14 km/h | 70% | 56% | 2 |
| Sun 11a | Partly sunny | 67°19° (likely 66°19° to 69°21°) | 67°19° | 0% | 3 mph5 km/h from S, gusts 10 mph15 km/h | 59% | 70% | 3 |
| Sun 12p | Cloudy | 71°22° (likely 70°21° to 73°23°) | 71°22° | 0% | 5 mph8 km/h from S, gusts 8 mph13 km/h | 49% | 79% | 4 |
| Sun 1p | Cloudy | 73°23° (likely 73°23° to 76°24°) | 73°23° | 0% | 5 mph8 km/h from S, gusts 6 mph10 km/h | 44% | 80% | 4 |
| Sun 2p | Cloudy | 76°24° (likely 74°23° to 77°25°) | 76°24° | 0% | 5 mph8 km/h from S, gusts 5 mph8 km/h | 39% | 80% | 4 |
| Sun 3p | Cloudy | 76°24° (likely 74°23° to 78°26°) | 76°24° | 0% | 3 mph5 km/h from S, gusts 5 mph8 km/h | 37% | 80% | 3 |
| Sun 4p | Cloudy | 76°24° (likely 73°23° to 77°25°) | 76°24° | 0% | 3 mph5 km/h from S, gusts 4 mph7 km/h | 37% | 80% | 2 |
| Sun 5p | Cloudy | 74°23° (likely 71°22° to 76°24°) | 74°23° | 0% | 3 mph5 km/h from S, gusts 5 mph7 km/h | 41% | 79% | 1 |
| Sun 6p | Cloudy | 70°21° (likely 67°19° to 71°22°) | 70°21° | 0% | 2 mph3 km/h from SSE, gusts 5 mph7 km/h | 47% | 78% | 0 |
| Sun 7p | Mostly cloudy | 66°19° (likely 64°18° to 67°19°) | 66°19° | 0% | 2 mph3 km/h from SSE, gusts 5 mph8 km/h | 56% | 67% | 0 |
| Sun 8p | Mostly cloudy | 63°17° (likely 60°16° to 65°18°) | 63°17° | 0% | 2 mph3 km/h from SSE, gusts 3 mph5 km/h | 62% | 63% | 0 |
| Sun 9p | Mostly cloudy | 60°16° (likely 58°14° to 64°18°) | 60°16° | 0% | 3 mph5 km/h from SSE, gusts 4 mph6 km/h | 67% | 60% | 0 |
| Sun 10p | Mostly cloudy | 57°14° (likely 56°13° to 63°17°) | 57°14° | 0% | 3 mph5 km/h from SSE, gusts 5 mph7 km/h | 75% | 74% | 0 |
| Sun 11p | Mostly cloudy | 56°13° (likely 56°13° to 62°17°) | 56°13° | 0% | 3 mph5 km/h from SSE, gusts 5 mph8 km/h | 77% | 67% | 0 |
Days ahead
Shaded: typical range for these dates (1991–2020)
Today, Oct 24. Cloudy. High 74°23°, low 45°7°. Typical 62°17° / 43°6°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 49°9°Dry
Afternoon
noon–6 PM
Partly sunny, 74°23°Dry
Evening
6 PM–midnight
Mostly clear, 58°14°Dry
Overnight
midnight–6 AM
Mostly clear, 48°9°Dry
Official NWS forecast
Today: Mostly sunny, with a high near 74. Southeast wind around 6 mph.
Tonight: Mostly clear, with a low around 45. Southeast wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 72°22°–74°23°
- Low, likely
- 45°7°–50°10°
- Typical high / low
- 62°17° / 43°6°
- Wind
- 8 mph13 km/h, gusts 17 mph27 km/h
- UV peak
- 4
Tomorrow, Oct 25. Partly sunny. High 76°24°, low 49°9°. Typical 61°16° / 42°6°. Dry. Mostly agree. Best day outdoors this week.
Morning
6 AM–noon
Partly sunny, 49°9°Dry
Afternoon
noon–6 PM
Cloudy, 76°24°Dry
Evening
6 PM–midnight
Mostly cloudy, 63°17°Dry
Overnight
midnight–6 AM
Cloudy, 54°12°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 49. South southeast wind around 3 mph.
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 76°24°).
- High, likely
- 74°23°–77°25°
- Low, likely
- 47°8°–50°10°
- Typical high / low
- 61°16° / 42°6°
- Wind
- 7 mph12 km/h, gusts 16 mph26 km/h
- UV peak
- 4
Monday, Oct 26. Cloudy. High 76°24°, low 49°9°. Typical 60°16° / 42°6°. Dry. Forecasts agree.
Morning
6 AM–noon
Cloudy, 54°12°Dry
Afternoon
noon–6 PM
Cloudy, 75°24°Dry
Evening
6 PM–midnight
Cloudy, 62°17°Dry
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 76. South wind around 2 mph.
Night: Mostly cloudy, with a low around 49. East southeast wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 75°24°–76°24°
- Low, likely
- 49°9°–55°13°
- Typical high / low
- 60°16° / 42°6°
- Wind
- 6 mph10 km/h
- UV peak
- 4
Tuesday, Oct 27. Cloudy. High 74°23°, low 49°9°. Typical 60°16° / 42°6°. Dry. Forecasts agree.
Morning
6 AM–noon
Cloudy, 55°13°Dry
Afternoon
noon–6 PM
Cloudy, 73°23°Dry
Evening
6 PM–midnight
Cloudy, 62°17°Dry
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.
Night: Mostly cloudy, with a low around 49.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 72°22°–74°23°
- Low, likely
- 49°9°–56°13°
- Typical high / low
- 60°16° / 42°6°
- Wind
- 9 mph15 km/h, gusts 23 mph36 km/h
- UV peak
- 3
Wednesday, Oct 28. Cloudy. High 75°24°, low 51°11°. Typical 60°16° / 41°5°. Dry. Forecasts agree.
Morning
6 AM–noon
Sunny, 56°13°Dry
Afternoon
noon–6 PM
Sunny, 76°24°Dry
Evening
6 PM–midnight
Partly cloudy, 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 75.
Night: Mostly clear, with a low around 51.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 74°23°–76°24°
- Low, likely
- 51°11°–55°13°
- Typical high / low
- 60°16° / 41°5°
- Wind
- 12 mph19 km/h, gusts 21 mph34 km/h
- UV peak
- 4
Thursday, Oct 29. Partly sunny. High 74°23°, low 46°8°. Typical 59°15° / 41°5°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 57°14°Dry
Afternoon
noon–6 PM
Sunny, 75°24°Dry
Evening
6 PM–midnight
Partly cloudy, 63°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 sunny, with a high near 74.
Night: Partly cloudy, with a low around 46.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 73°23°–79°26°
- Low, likely
- 46°8°–57°14°
- Typical high / low
- 59°15° / 41°5°
- Wind
- 14 mph23 km/h, gusts 28 mph45 km/h
- UV peak
- 4
Friday, Oct 30. Cloudy. High 69°21°, low 54°12°. Typical 58°14° / 41°5°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 57°14°Dry
Afternoon
noon–6 PM
Partly sunny, 77°25°Dry
Evening
6 PM–midnight
Cloudy, 66°19°Dry
Overnight
midnight–6 AM
Cloudy, 60°15°20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 69°21°–79°26°
- Low, likely
- 50°10°–58°14°
- Typical high / low
- 58°14° / 41°5°
- Wind
- 11 mph17 km/h, gusts 27 mph44 km/h
- UV peak
- 3
Saturday, Oct 31. Cloudy. High 74°23°, low 59°15°. Typical 58°14° / 40°4°. Rain 0.14 in3.6 mm, 40% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 63°17°30% chance
Afternoon
noon–6 PM
Cloudy, 75°24°30% chance
Evening
6 PM–midnight
Drizzle, 67°20°40% chance · 0.05 in1.2 mm
Overnight
midnight–6 AM
Drizzle, 63°17°40% chance · 0.04 in1 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
- 57°14°–62°17°
- Typical high / low
- 58°14° / 40°4°
- Wind
- 16 mph25 km/h, gusts 31 mph50 km/h
- UV peak
- 2
Sunday, Nov 1. Showers. High 69°21°, low 61°16°. Typical 57°14° / 40°4°. Rain 0.43 in11 mm, 40% chance. Mostly agree.
Morning
6 AM–noon
Partly sunny, 63°17°40% chance · 0.03 in0.7 mm
Afternoon
noon–6 PM
Cloudy, 69°20°40% chance · 0.2 in5.1 mm
Evening
6 PM–midnight
Cloudy, 66°19°40% chance · 0.27 in6.7 mm
Overnight
midnight–6 AM
Drizzle, 57°14°40% chance · 0.15 in3.7 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°–73°23°
- Low, likely
- 58°14°–64°18°
- Typical high / low
- 57°14° / 40°4°
- Wind
- 24 mph38 km/h, gusts 45 mph72 km/h
- UV peak
- 3
Monday, Nov 2. Cloudy. High 66°19°, low 53°12°. Typical 57°14° / 40°4°. Rain 0.39 in9.9 mm, 40% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 58°15°20% chance · 0.09 in2.2 mm
Afternoon
noon–6 PM
Cloudy, 63°17°20% chance · 0.08 in1.9 mm
Evening
6 PM–midnight
Cloudy, 57°14°Dry
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
- 63°17°–71°22°
- Low, likely
- 48°9°–59°15°
- Typical high / low
- 57°14° / 40°4°
- Wind
- 17 mph27 km/h, gusts 42 mph68 km/h
- UV peak
- 3
The outlook
Today
Dry, high 74°, low 45°.
Tomorrow
Dry, high 76°, low 49°.
Monday
Dry, high 76°, low 49°.
Rest of week
Highs 66–75°; chance of precipitation on Sunday.
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
Rivers
NOAA river gauges within 25 mi
West Okaw River near Lovington
18 mi- Level
- 2.2 ft
Reading from Sat 12 AM · NWS gauge page
Robinson Creek (IL) near Shelbyville
22 mi- Level
- 2.7 ft
- Flow
- 54 cfs
Reading from Fri 11:30 PM · NWS gauge page
Kaskaskia River at Shelbyville
24 mi- Level
- 536 ft
- Flow
- 70 cfs
Reading from Fri 11:30 PM · NWS gauge page
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
About 84% less heating than a typical week.
This week 16Typical 99
Heating degree days, base 65°F
Heat-pump hours, next 7 days
- h below 47°F
- 7
- 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.
- Normal high / low
- 62°17° / 43°6°
- Forecast high / low
- 74°23° / 45°7°
- Record high
- 83°28° in 1921
- Record low
- 18°−8° in 1981
Last 7 days vs normal
- —SatOct 17
- —SunOct 18
- —MonOct 19
- —TueOct 20
- —WedOct 21
- —ThuOct 22
- —FriOct 23
Macon weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:15 AM, sunset 6:03 PM.
- Daylight
- 10 h 48 min
- Losing 2 min 25 s a day; shortest Dec 21, 1 h 27 min less
- Golden hour
- 5:26–6:20 PM
- Morning 6:58–7:53 AM
- Blue hour
- 6:20–6:31 PM
- Morning 6:48–6:58 AM; first light 6:48 AM
Stars tonight? Fair
Mostly clear 12:53–5 AM, but the moon is 96% lit and up.
Moon
Waxing gibbous
95% lit · growing
- Today
- sets 5:30 AM · rises 5:01 PM
- Full moon
- Oct 25
- New moon
- Nov 9
