Observed 7:30 AM CDT at KARR

Oswego, IL weather

Foggy and 45°7°, 12°7° warmer than a typical Oct 23.

Forecasts agree

Now 45°7°

Fog

Wind: Calm; Up to 5 mph8 km/h through 7 PM
Visibility: 2 mi3 km; Fog · under 3 mi5 km
Dew point: 45°7°; Comfortable
Humidity: 100%; Air 45°7°, dew point 45°7° · fog or dew likely
UV index: 0Low; Moderate 12–3 PM · peak 4
Air quality: 97Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.31 inHg1026 hPa; Rising slowly · +0.02 inHg+0.8 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

2°1° warmer than this time yesterday (41°5° then, 43°6° now)

Good hours for

Above 60°16° today by 11 AM
High 72°22° today at 2 PM
Below 60°16° tonight after 8 PM

This morningUp to 64°18° by 11 AM · Clear
This afternoonUp to 72°22° by 2 PM · Clear
TonightDown to 48°9° by 5 AM · Partly cloudy
Tomorrow morningUp to 63°17° by 11 AM · Cloudy
Tomorrow afternoonUp to 72°22° by 3 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
Fri 7a	Sunny	47°8° (likely 44°7° to 47°8°)	47°8°	0%	0 mph0 km/h, gusts 6 mph10 km/h	92%	15%	0
Fri 8a	Sunny	48°9° (likely 44°7° to 49°9°)	48°9°	0%	0 mph0 km/h, gusts 6 mph9 km/h	90%	15%	0
Fri 9a	Sunny	54°12° (likely 49°9° to 54°12°)	54°12°	0%	5 mph8 km/h from SE, gusts 7 mph12 km/h	77%	8%	0
Fri 10a	Sunny	59°15° (likely 56°13° to 59°15°)	59°15°	0%	5 mph8 km/h from SSE, gusts 8 mph13 km/h	71%	0%	1
Fri 11a	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	5 mph8 km/h from SSE, gusts 9 mph14 km/h	62%	1%	2
Fri 12p	Sunny	68°20° (likely 64°18° to 68°20°)	68°20°	0%	5 mph8 km/h from SSE, gusts 8 mph14 km/h	53%	3%	3
Fri 1p	Sunny	70°21° (likely 67°19° to 70°21°)	71°22°	0%	5 mph8 km/h from SSE, gusts 8 mph13 km/h	46%	4%	4
Fri 2p	Sunny	72°22° (likely 69°21° to 72°22°)	72°22°	0%	5 mph8 km/h from SSE, gusts 9 mph14 km/h	44%	3%	3
Fri 3p	Sunny	72°22° (likely 69°21° to 72°22°)	73°23°	0%	5 mph8 km/h from SE, gusts 8 mph14 km/h	42%	2%	2
Fri 4p	Sunny	72°22° (likely 69°21° to 72°22°)	73°23°	0%	5 mph8 km/h from SE, gusts 8 mph13 km/h	41%	37%	1
Fri 5p	Sunny	70°21° (likely 67°19° to 70°21°)	70°21°	0%	5 mph8 km/h from ESE, gusts 8 mph14 km/h	45%	8%	0
Fri 6p	Mostly clear	66°19° (likely 62°17° to 66°19°)	66°19°	0%	5 mph8 km/h from ESE, gusts 6 mph10 km/h	53%	53%	0
Fri 7p	Mostly clear	62°17° (likely 59°15° to 62°17°)	62°17°	0%	5 mph8 km/h from ESE, gusts 9 mph14 km/h	62%	55%	0
Fri 8p	Mostly clear	59°15° (likely 57°14° to 59°15°)	59°15°	0%	5 mph8 km/h from ESE, gusts 11 mph18 km/h	68%	60%	0
Fri 9p	Mostly clear	57°14° (likely 56°13° to 58°14°)	57°14°	0%	5 mph8 km/h from ESE, gusts 11 mph17 km/h	71%	63%	0
Fri 10p	Mostly clear	56°13° (likely 55°13° to 56°13°)	56°13°	0%	5 mph8 km/h from SE, gusts 10 mph16 km/h	74%	43%	0
Fri 11p	Mostly clear	54°12° (likely 54°12° to 55°13°)	54°12°	0%	5 mph8 km/h from SE, gusts 11 mph18 km/h	75%	50%	0
Sat 12a	Mostly clear	53°12° (likely 53°12° to 54°12°)	53°12°	0%	5 mph8 km/h from SE, gusts 12 mph19 km/h	78%	21%	0
Sat 1a	Mostly clear	52°11° (likely 51°11° to 54°12°)	52°11°	0%	5 mph8 km/h from SE, gusts 12 mph19 km/h	78%	27%	0
Sat 2a	Cloudy	51°11° (likely 50°10° to 53°12°)	51°11°	0%	5 mph8 km/h from SE, gusts 12 mph19 km/h	81%	74%	0
Sat 3a	Partly cloudy	50°10° (likely 49°9° to 52°11°)	49°9°	0%	5 mph8 km/h from SE, gusts 11 mph17 km/h	84%	68%	0
Sat 4a	Partly cloudy	49°9° (likely 48°9° to 51°11°)	48°9°	0%	5 mph8 km/h from SSE, gusts 10 mph16 km/h	87%	56%	0
Sat 5a	Partly cloudy	48°9° (likely 47°8° to 51°11°)	47°8°	0%	5 mph8 km/h from SE, gusts 10 mph15 km/h	88%	81%	0
Sat 6a	Cloudy	48°9° (likely 46°8° to 51°11°)	46°8°	0%	5 mph8 km/h from SSE, gusts 9 mph15 km/h	90%	86%	0
Sat 7a	Cloudy	47°8° (likely 46°8° to 51°11°)	46°8°	0%	5 mph8 km/h from SSE, gusts 9 mph14 km/h	92%	89%	0
Sat 8a	Cloudy	48°9° (likely 48°9° to 52°11°)	47°8°	0%	5 mph8 km/h from SSE, gusts 10 mph16 km/h	91%	84%	0
Sat 9a	Cloudy	54°12° (likely 52°11° to 54°12°)	54°12°	0%	5 mph8 km/h from SSE, gusts 11 mph18 km/h	84%	92%	1
Sat 10a	Cloudy	58°14° (likely 55°13° to 58°14°)	59°15°	0%	5 mph8 km/h from SSE, gusts 13 mph21 km/h	75%	91%	2
Sat 11a	Cloudy	63°17° (likely 59°15° to 63°17°)	63°17°	0%	5 mph8 km/h from SSE, gusts 12 mph20 km/h	67%	81%	3
Sat 12p	Cloudy	66°19° (likely 62°17° to 66°19°)	66°19°	0%	5 mph8 km/h from SSE, gusts 13 mph20 km/h	59%	79%	3
Sat 1p	Cloudy	69°21° (likely 65°18° to 69°21°)	69°21°	0%	10 mph16 km/h from S, gusts 12 mph19 km/h	53%	80%	4
Sat 2p	Cloudy	70°21° (likely 66°19° to 70°21°)	71°22°	0%	10 mph16 km/h from S, gusts 13 mph21 km/h	50%	79%	3
Sat 3p	Cloudy	72°22° (likely 67°19° to 72°22°)	72°22°	0%	10 mph16 km/h from SSE, gusts 13 mph21 km/h	47%	78%	3
Sat 4p	Cloudy	72°22° (likely 67°19° to 72°22°)	72°22°	0%	10 mph16 km/h from SSE, gusts 13 mph20 km/h	45%	70%	2
Sat 5p	Cloudy	70°21° (likely 66°19° to 70°21°)	70°21°	0%	5 mph8 km/h from SSE, gusts 12 mph19 km/h	47%	64%	1
Sat 6p	Cloudy	66°19° (likely 62°17° to 66°19°)	66°19°	0%	5 mph8 km/h from SSE, gusts 9 mph15 km/h	54%	68%	0
Sat 7p	Cloudy	62°17° (likely 59°15° to 62°17°)	63°17°	0%	5 mph8 km/h from SSE, gusts 9 mph15 km/h	61%	66%	0
Sat 8p	Partly cloudy	60°16° (likely 56°13° to 60°16°)	60°16°	0%	5 mph8 km/h from SSE, gusts 10 mph16 km/h	65%	69%	0
Sat 9p	Cloudy	59°15° (likely 55°13° to 59°15°)	59°15°	0%	5 mph8 km/h from SSE, gusts 11 mph18 km/h	68%	61%	0
Sat 10p	Partly cloudy	57°14° (likely 54°12° to 58°14°)	57°14°	0%	5 mph8 km/h from SSE, gusts 13 mph21 km/h	70%	62%	0
Sat 11p	Partly cloudy	56°13° (likely 53°12° to 57°14°)	56°13°	0%	5 mph8 km/h from SSE, gusts 11 mph18 km/h	72%	56%	0
Sun 12a	Partly cloudy	55°13° (likely 52°11° to 56°13°)	55°13°	0%	5 mph8 km/h from S, gusts 11 mph18 km/h	74%	67%	0
Sun 1a	Cloudy	54°12° (likely 51°11° to 55°13°)	54°12°	0%	5 mph8 km/h from S, gusts 10 mph16 km/h	75%	76%	0
Sun 2a	Partly cloudy	53°12° (likely 50°10° to 55°13°)	53°12°	0%	5 mph8 km/h from S, gusts 7 mph11 km/h	76%	63%	0
Sun 3a	Cloudy	52°11° (likely 49°9° to 55°13°)	52°11°	0%	5 mph8 km/h from S, gusts 6 mph10 km/h	78%	73%	0
Sun 4a	Cloudy	51°11° (likely 48°9° to 54°12°)	51°11°	0%	5 mph8 km/h from S, gusts 6 mph10 km/h	81%	73%	0
Sun 5a	Cloudy	50°10° (likely 47°8° to 54°12°)	49°9°	0%	5 mph8 km/h from S, gusts 6 mph9 km/h	84%	75%	0
Sun 6a	Cloudy	49°9° (likely 46°8° to 54°12°)	49°9°	0%	0 mph0 km/h, gusts 6 mph9 km/h	86%	78%	0

Days ahead

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

Today, Oct 23. Fog. High 72°22°, low 47°8°. Typical 60°16° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 48°9°
  Dry
Official NWS forecast
Today: Patchy fog before 8am. Sunny. High near 72, with temperatures falling to around 70 in the afternoon. Southeast wind 0 to 5 mph.
Tonight: Mostly clear, with a low around 47. Southeast wind around 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
69°21°–72°22°
Low, likely
44°7°–47°8°
Typical high / low
60°16° / 41°5°
Wind
8 mph13 km/h, gusts 16 mph26 km/h
UV peak
4
Tomorrow, Oct 24. Cloudy. High 72°22°, low 49°9°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Official NWS forecast
Day: Partly sunny. High near 72, with temperatures falling to around 70 in the afternoon. South southeast wind 5 to 10 mph.
Night: 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
67°19°–72°22°
Low, likely
46°8°–51°11°
Typical high / low
60°16° / 40°4°
Wind
10 mph16 km/h, gusts 19 mph31 km/h
UV peak
4
Sunday, Oct 25. Cloudy. High 74°23°, low 50°10°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 74. South wind 0 to 5 mph.
Night: Partly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–74°23°
Low, likely
46°8°–53°12°
Typical high / low
60°16° / 40°4°
Wind
8 mph13 km/h, gusts 15 mph24 km/h
UV peak
3
Monday, Oct 26. Cloudy. High 70°21°, low 48°9°. Typical 59°15° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 70.
Night: Mostly cloudy, with a low around 48.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
65°18°–72°22°
Low, likely
48°9°–52°11°
Typical high / low
59°15° / 40°4°
Wind
11 mph18 km/h, gusts 19 mph31 km/h
UV peak
3
Tuesday, Oct 27. Mostly cloudy. High 66°19°, low 48°9°. Typical 58°14° / 39°4°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 66.
Night: Mostly cloudy, with a low around 48.
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 66°19°).
High, likely
64°18°–68°20°
Low, likely
48°9°–52°11°
Typical high / low
58°14° / 39°4°
Wind
8 mph12 km/h, gusts 25 mph40 km/h
UV peak
3
Wednesday, Oct 28. Mostly cloudy. High 70°21°, low 48°9°. Typical 58°14° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 57°14°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 70.
Night: Partly cloudy, with a low around 48.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–73°23°
Low, likely
48°9°–55°13°
Typical high / low
58°14° / 39°4°
Wind
13 mph21 km/h, gusts 24 mph38 km/h
UV peak
4
Thursday, Oct 29. Showers. High 69°21°, low 46°8°. Typical 58°14° / 38°3°. Rain 0.07 in1.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers after 7am. Mostly sunny, with a high near 69.
Night: A chance of rain showers. Mostly cloudy, with a low around 46.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–69°21°
Low, likely
44°7°–51°11°
Typical high / low
58°14° / 38°3°
Wind
13 mph21 km/h, gusts 36 mph58 km/h
UV peak
2
Friday, Oct 30. Sunny. High 59°15°, low 43°6°. Typical 57°14° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Clear, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°4°
  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
53°12°–68°20°
Low, likely
38°3°–50°10°
Typical high / low
57°14° / 38°3°
Wind
10 mph16 km/h, gusts 24 mph39 km/h
UV peak
1
Saturday, Oct 31. Cloudy. High 61°16°, low 43°6°. Typical 56°13° / 38°3°. Rain 0.1 in2.5 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 42°6°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 59°15°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 53°12°
  30% chance
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  40% chance
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
54°12°–65°18°
Low, likely
34°1°–55°13°
Typical high / low
56°13° / 38°3°
Wind
11 mph17 km/h, gusts 20 mph31 km/h
UV peak
2
Sunday, Nov 1. Cloudy. High 63°17°, low 53°12°. Typical 56°13° / 37°3°. Rain 0.11 in2.8 mm, 40% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 62°16°
  30% chance
3. Evening
  6 PM–midnight
  Clear, 56°13°
  20% chance
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
62°17°–64°18°
Low, likely
52°11°–54°12°
Typical high / low
56°13° / 37°3°
Wind
12 mph19 km/h, gusts 25 mph41 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 72°, low 47°.
Tomorrow
Dry, high 72°, low 49°.
Sunday
Dry, high 74°, low 50°.
Rest of week
Mostly dry, highs 59–70°.

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

Waubonse Creek at Oswego

1.4 mi

Below flood stage

Level: 8.1 ft
Flow: 24 cfs

Reading from Fri 6:15 AM · NWS gauge page

Fox River at Montgomery

3.5 mi

Below flood stage

Level: 11.5 ft
Flow: 1,110 cfs

Reading from Fri 6 AM · NWS gauge page

Blackberry Creek at Montgomery

4.6 mi

Below flood stage

Level: 3.8 ft
Flow: 49 cfs

Reading from Fri 6:30 AM · NWS gauge page

Blackberry Creek at Yorkville

5.4 mi

Below flood stage

Level: 3.7 ft
Flow: 57 cfs

Reading from Fri 6:30 AM · 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 15Typical 110

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 45°F).

Open the windows?

Today, 11:00 AM–7:00 PM

Good stretch to open the windows.

Is this typical?

ROMEOVILLE WFO · official normals 1991–2020 · records 1992–2026

Oct 23, today vs a typical year

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

Last 7 days vs normal

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

−6°−4°SatOct 17
−2°−1°SunOct 18
+1°MonOct 19
+5°+3°TueOct 20
+6°+3°WedOct 21
+9°+5°ThuOct 22
—FriOct 23

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

Sun & moon

Sun

Daylight: 10 h 45 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 36 min less
Golden hour: 5:21–6:17 PM; Morning 6:57–7:53 AM
Blue hour: 6:17–6:28 PM; Morning 6:46–6:57 AM; first light 6:46 AM

Stars tonight? Poor

Clouds most of the night (about 57% cover).

Moon

Waxing gibbous

91% lit · growing

Today: sets 4:19 AM · rises 4:33 PM
Full moon: Oct 25
New moon: Nov 9

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

Oswego, IL weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Waubonse Creek at Oswego

Fox River at Montgomery

Blackberry Creek at Montgomery

Blackberry Creek at Yorkville

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 23, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Poor

Moon