Observed 5:35 PM CDT at KRPJ

Grand Detour, IL weather

Sunny and 69°21°, 11°6° warmer than a typical Oct 24.

Forecasts agree

Now 69°21°

Sunny

Wind: 5 mph8 km/h; From the south-southeast. Up to 5 mph8 km/h through 6 AM
Dew point: 46°8°; Comfortable
UV tomorrow: 3Moderate; Moderate 12–4 PM · peak 3
Pressure: 30.34 inHg1027 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 (68°20° then, 69°21° now)

Good hours for

Below 60°16° tonight after 8 PM
Low 47°8° tomorrow at 7 AM
Above 60°16° tomorrow by 10 AM
High 75°24° tomorrow at 2 PM

TonightDown to 48°9° by 5 AM · Partly cloudy
Tomorrow morningUp to 66°19° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 75°24° by 2 PM · Mostly cloudy
Tomorrow nightDown to 49°9° by 5 AM · Mostly cloudy
Monday morningUp to 62°17° by 11 AM · Cloudy
Monday afternoonUp to 69°21° by 3 PM · 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 6p	Partly cloudy	66°19° (likely 63°17° to 66°19°)	67°19°	0%	5 mph8 km/h from SSE, gusts 10 mph15 km/h	48%	58%	0
Sat 7p	Partly cloudy	61°16° (likely 60°16° to 61°16°)	61°16°	0%	5 mph8 km/h from SSE, gusts 9 mph15 km/h	58%	47%	0
Sat 8p	Clear	58°14° (likely 57°14° to 60°16°)	58°14°	0%	5 mph8 km/h from SSE, gusts 11 mph17 km/h	66%	24%	0
Sat 9p	Clear	56°13° (likely 56°13° to 59°15°)	56°13°	0%	5 mph8 km/h from SSE, gusts 11 mph18 km/h	71%	14%	0
Sat 10p	Partly cloudy	54°12° (likely 54°12° to 57°14°)	55°13°	0%	5 mph8 km/h from SSE, gusts 11 mph17 km/h	73%	20%	0
Sat 11p	Partly cloudy	53°12° (likely 53°12° to 56°13°)	53°12°	0%	5 mph8 km/h from SSE, gusts 11 mph18 km/h	75%	40%	0
Sun 12a	Partly cloudy	52°11° (likely 52°11° to 55°13°)	52°11°	0%	0 mph0 km/h, gusts 10 mph16 km/h	76%	76%	0
Sun 1a	Cloudy	51°11° (likely 51°11° to 54°12°)	51°11°	0%	0 mph0 km/h, gusts 9 mph15 km/h	80%	76%	0
Sun 2a	Cloudy	50°10° (likely 50°10° to 54°12°)	51°11°	0%	0 mph0 km/h, gusts 9 mph15 km/h	80%	79%	0
Sun 3a	Cloudy	50°10° (likely 50°10° to 53°12°)	50°10°	0%	0 mph0 km/h, gusts 9 mph14 km/h	82%	80%	0
Sun 4a	Cloudy	49°9° (likely 49°9° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 9 mph15 km/h	86%	79%	0
Sun 5a	Cloudy	48°9° (likely 48°9° to 52°11°)	48°9°	0%	0 mph0 km/h, gusts 9 mph15 km/h	87%	81%	0
Sun 6a	Cloudy	48°9° (likely 48°9° to 52°11°)	48°9°	0%	0 mph0 km/h, gusts 9 mph14 km/h	88%	77%	0
Sun 7a	Cloudy	47°8° (likely 47°8° to 52°11°)	47°8°	0%	0 mph0 km/h, gusts 8 mph12 km/h	88%	80%	0
Sun 8a	Cloudy	49°9° (likely 49°9° to 53°12°)	48°9°	0%	5 mph8 km/h from S, gusts 8 mph13 km/h	87%	78%	0
Sun 9a	Cloudy	54°12° (likely 52°11° to 56°13°)	54°12°	0%	5 mph8 km/h from S, gusts 7 mph12 km/h	76%	80%	1
Sun 10a	Cloudy	60°16° (likely 58°14° to 60°16°)	60°16°	0%	5 mph8 km/h from S, gusts 12 mph19 km/h	65%	77%	1
Sun 11a	Partly sunny	66°19° (likely 63°17° to 66°19°)	66°19°	0%	5 mph8 km/h from SSW, gusts 12 mph19 km/h	55%	52%	2
Sun 12p	Cloudy	70°21° (likely 66°19° to 70°21°)	70°21°	0%	5 mph8 km/h from SSW, gusts 11 mph18 km/h	48%	79%	3
Sun 1p	Partly sunny	72°22° (likely 68°20° to 72°22°)	73°23°	0%	5 mph8 km/h from SSW, gusts 10 mph16 km/h	45%	75%	3
Sun 2p	Cloudy	75°24° (likely 70°21° to 75°24°)	75°24°	0%	5 mph8 km/h from S, gusts 10 mph16 km/h	43%	74%	3
Sun 3p	Sunny	75°24° (likely 71°22° to 75°24°)	75°24°	0%	5 mph8 km/h from S, gusts 9 mph15 km/h	41%	43%	3
Sun 4p	Mostly cloudy	75°24° (likely 71°22° to 75°24°)	75°24°	0%	5 mph8 km/h from S, gusts 8 mph12 km/h	42%	71%	2
Sun 5p	Cloudy	73°23° (likely 68°20° to 73°23°)	73°23°	0%	5 mph8 km/h from S, gusts 7 mph12 km/h	45%	78%	1
Sun 6p	Cloudy	68°20° (likely 64°18° to 68°20°)	68°20°	0%	5 mph8 km/h from S, gusts 6 mph10 km/h	51%	79%	0
Sun 7p	Cloudy	63°17° (likely 61°16° to 63°17°)	63°17°	0%	5 mph8 km/h from S, gusts 7 mph12 km/h	62%	80%	0
Sun 8p	Cloudy	60°16° (likely 59°15° to 61°16°)	60°16°	0%	5 mph8 km/h from S, gusts 7 mph12 km/h	68%	75%	0
Sun 9p	Cloudy	58°14° (likely 57°14° to 59°15°)	58°14°	0%	5 mph8 km/h from S, gusts 6 mph10 km/h	73%	69%	0
Sun 10p	Cloudy	56°13° (likely 55°13° to 58°14°)	56°13°	0%	5 mph8 km/h from S, gusts 6 mph9 km/h	76%	78%	0
Sun 11p	Cloudy	55°13° (likely 54°12° to 56°13°)	55°13°	0%	5 mph8 km/h from S, gusts 5 mph8 km/h	78%	75%	0
Mon 12a	Partly cloudy	54°12° (likely 54°12° to 56°13°)	54°12°	0%	5 mph8 km/h from S, gusts 5 mph8 km/h	80%	68%	0
Mon 1a	Partly cloudy	53°12° (likely 53°12° to 55°13°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	82%	66%	0
Mon 2a	Partly cloudy	52°11° (likely 52°11° to 54°12°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	83%	66%	0
Mon 3a	Cloudy	51°11° (likely 51°11° to 53°12°)	51°11°	0%	0 mph0 km/h, gusts 7 mph11 km/h	85%	80%	0
Mon 4a	Cloudy	50°10° (likely 50°10° to 53°12°)	50°10°	0%	0 mph0 km/h, gusts 8 mph13 km/h	90%	74%	0
Mon 5a	Cloudy	49°9° (likely 49°9° to 52°11°)	48°9°	0%	5 mph8 km/h from ENE, gusts 11 mph18 km/h	93%	83%	0
Mon 6a	Cloudy	49°9° (likely 49°9° to 52°11°)	47°8°	0%	5 mph8 km/h from ENE, gusts 13 mph21 km/h	96%	82%	0
Mon 7a	Cloudy	48°9° (likely 48°9° to 52°11°)	46°8°	0%	5 mph8 km/h from NE, gusts 14 mph23 km/h	99%	80%	0
Mon 8a	Cloudy	49°9° (likely 49°9° to 53°12°)	47°8°	0%	5 mph8 km/h from ENE, gusts 15 mph24 km/h	99%	84%	0
Mon 9a	Cloudy	53°12° (likely 52°11° to 55°13°)	53°12°	0%	5 mph8 km/h from ENE, gusts 18 mph29 km/h	89%	89%	0
Mon 10a	Cloudy	58°14° (likely 55°13° to 58°14°)	58°14°	0%	5 mph8 km/h from ENE, gusts 17 mph27 km/h	77%	94%	1
Mon 11a	Cloudy	62°17° (likely 57°14° to 62°17°)	62°17°	0%	5 mph8 km/h from ENE, gusts 15 mph24 km/h	68%	92%	2
Mon 12p	Cloudy	65°18° (likely 60°16° to 65°18°)	65°18°	0%	5 mph8 km/h from E, gusts 14 mph22 km/h	64%	82%	2
Mon 1p	Cloudy	67°19° (likely 63°17° to 67°19°)	67°19°	0%	5 mph8 km/h from E, gusts 13 mph21 km/h	60%	84%	3
Mon 2p	Cloudy	68°20° (likely 63°17° to 70°21°)	69°21°	0%	5 mph8 km/h from E, gusts 11 mph17 km/h	57%	84%	2
Mon 3p	Cloudy	69°21° (likely 64°18° to 71°22°)	69°21°	0%	5 mph8 km/h from E, gusts 11 mph18 km/h	55%	87%	2
Mon 4p	Cloudy	68°20° (likely 64°18° to 71°22°)	68°20°	0%	5 mph8 km/h from E, gusts 12 mph19 km/h	56%	77%	2
Mon 5p	Mostly cloudy	66°19° (likely 62°17° to 71°22°)	66°19°	0%	10 mph16 km/h from E, gusts 14 mph22 km/h	59%	79%	1

Days ahead

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

Today, Oct 24. Cloudy. High 70°21°, low 47°8°. Typical 59°15° / 39°4°. Dry. Forecasts agree.
1. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
2. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Official NWS forecast
Tonight: Partly cloudy, with a low around 47. South southeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
70°21°
Low, likely
47°8°–50°10°
Typical high / low
59°15° / 39°4°
Wind
10 mph15 km/h, gusts 19 mph31 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 75°24°, low 48°9°. Typical 59°15° / 39°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 75°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. High near 75, with temperatures falling to around 73 in the afternoon. South wind 0 to 5 mph.
Night: Mostly cloudy, with a low around 48. East wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
71°22°–75°24°
Low, likely
48°9°–52°11°
Typical high / low
59°15° / 39°4°
Wind
7 mph11 km/h, gusts 15 mph24 km/h
UV peak
3
Monday, Oct 26. Cloudy. High 69°21°, low 45°7°. Typical 58°14° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Official NWS forecast
Day: Partly sunny, with a high near 69. East northeast wind 5 to 10 mph.
Night: Mostly cloudy, with a low around 45. East wind 5 to 10 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
65°18°–70°21°
Low, likely
45°7°–51°11°
Typical high / low
58°14° / 38°3°
Wind
14 mph22 km/h, gusts 23 mph37 km/h
UV peak
3
Tuesday, Oct 27. Mostly cloudy. High 71°22°, low 53°12°. Typical 58°14° / 38°3°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 61°16°
  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 71.
Night: Mostly cloudy, with a low around 53.
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 71°22°).
High, likely
67°19°–71°22°
Low, likely
49°9°–53°12°
Typical high / low
58°14° / 38°3°
Wind
11 mph18 km/h, gusts 20 mph32 km/h
UV peak
2
Wednesday, Oct 28. Cloudy. High 74°23°, low 54°12°. Typical 57°14° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 56°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 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. Partly cloudy, with a low around 54.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
71°22°–74°23°
Low, likely
53°12°–57°14°
Typical high / low
57°14° / 38°3°
Wind
14 mph22 km/h, gusts 28 mph45 km/h
UV peak
4
Thursday, Oct 29. Showers. High 74°23°, low 53°12°. Typical 57°14° / 37°3°. Rain 0.15 in3.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 62°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers. Mostly sunny, with a high near 74.
Night: A slight chance of rain showers. Partly cloudy, with a low around 53.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–74°23°
Low, likely
53°12°–59°15°
Typical high / low
57°14° / 37°3°
Wind
13 mph20 km/h, gusts 30 mph49 km/h
UV peak
3
Friday, Oct 30. Showers. High 74°23°, low 54°12°. Typical 56°13° / 37°3°. Rain 0.04 in1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 65°18°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 61°16°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers before 1pm. Partly sunny, with a high near 74.
Night: A slight chance of rain showers after 1am. Mostly cloudy, with a low around 54.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
68°20°–76°24°
Low, likely
50°10°–60°16°
Typical high / low
56°13° / 37°3°
Wind
17 mph28 km/h, gusts 29 mph46 km/h
UV peak
3
Saturday, Oct 31. Showers. High 71°22°, low 58°14°. Typical 56°13° / 37°3°. Rain 0.15 in3.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 60°16°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  40% chance
3. Evening
  6 PM–midnight
  Rain, 62°17°
  50% chance · 0.12 in3 mm
4. Overnight
  midnight–6 AM
  Drizzle, 60°16°
  50% chance · 0.13 in3.4 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Mostly cloudy, with a high near 71.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–73°23°
Low, likely
54°12°–61°16°
Typical high / low
56°13° / 37°3°
Wind
20 mph32 km/h, gusts 33 mph53 km/h
UV peak
2
Sunday, Nov 1. Drizzle. High 65°18°, low 56°13°. Typical 55°13° / 36°2°. Rain 0.39 in9.9 mm, 50% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Drizzle, 61°16°
  50% chance · 0.06 in1.6 mm
2. Afternoon
  noon–6 PM
  Drizzle, 64°18°
  40% chance · 0.07 in1.8 mm
3. Evening
  6 PM–midnight
  Drizzle, 61°16°
  30% chance · 0.12 in3.1 mm
4. Overnight
  midnight–6 AM
  Drizzle, 48°9°
  40% chance · 0.03 in0.8 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 agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–66°19°
Low, likely
54°12°–59°15°
Typical high / low
55°13° / 36°2°
Wind
22 mph36 km/h, gusts 33 mph54 km/h
Monday, Nov 2. Drizzle. High 59°15°, low 49°9°. Typical 55°13° / 36°2°. Rain 0.62 in16 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 48°9°
  30% chance · 0.25 in6.2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 55°13°
  30% chance · 0.27 in6.8 mm
3. Evening
  6 PM–midnight
  Drizzle, 52°11°
  30% chance · 0.11 in2.7 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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
52°11°–67°19°
Low, likely
36°2°–62°17°
Typical high / low
55°13° / 36°2°
Wind
20 mph32 km/h, gusts 40 mph64 km/h
UV peak
1

10 days15 days30 days

The outlook

Today
Dry, high 70°, low 47°.
Tomorrow
Dry, high 75°, low 48°, warming up.
Monday
Dry, high 69°, low 45°, cooling off.
Rest of week
Highs 59–74°; chance of precipitation on Sunday.

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

Rock River at Dixon

5.4 mi

Below flood stage

Level: 9.4 ft
Flow: 5,990 cfs

Reading from Sat 4:15 PM · NWS gauge page

Elkhorn Creek (IL) near Penrose

15 mi

Level: 3.2 ft
Flow: 84 cfs

Reading from Sat 4:45 PM · NWS gauge page

Rock River at Byron

17 mi

Below flood stage

Level: 6.6 ft
Flow: 5,190 cfs

Reading from Sat 4:15 PM · NWS gauge page

Rock River at Como

19 mi

Below flood stage

Level: 4.6 ft
Flow: 5,830 cfs

Reading from Sat 4:45 PM · NWS gauge page

For your home

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

Heating this week

About 87% less heating than a typical week.

This week 16Typical 120

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 1
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 46°F).

Open the windows?

Sun, 10:00 AM–8:00 PM

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

Is this typical?

DIXON WWTP · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 11°6° warmer than typical.

Last 7 days vs normal

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

Grand Detour weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 42 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 34 min less
Golden hour: 5:23–6:19 PM; Morning 7:03–7:59 AM
Blue hour: 6:19–6:30 PM; Morning 6:52–7:03 AM; first light 6:52 AM

Stars tonight? Fair

Mostly clear 8–11 PM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:33 AM · rises 5:00 PM
Full moon: Oct 25
New moon: Nov 9

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

Grand Detour, IL weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Rock River at Dixon

Elkhorn Creek (IL) near Penrose

Rock River at Byron

Rock River at Como

For your home

Heating this week

Heat-pump hours, next 7 days

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