Observed 2:45 PM CDT at KSPI

Mason City, IL weather

Sunny and 73°23°, 12°7° warmer than a typical Oct 24.

Forecasts agree

Now 73°23°

Sunny

Wind: 5 mph7 km/h; From the east-southeast. 35–7 mph11 km/h through 3 AM
Dew point: 43°6°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Pressure: 30.34 inHg1027 hPa; Falling · −0.06 inHg−2.0 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

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

This afternoonNear 73°23° · Clear
TonightDown to 48°9° by 5 AM · Partly cloudy
Tomorrow morningUp to 68°20° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 77°25° by 3 PM · Mostly cloudy
Tomorrow nightDown to 50°10° by 5 AM · Mostly cloudy
Monday morningUp to 69°21° by 11 AM · Cloudy
Monday afternoonUp to 76°24° by 2 PM · 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 3p	Mostly sunny	74°23° (likely 71°22° to 74°23°)	74°23°	0%	8 mph13 km/h from SSE, gusts 9 mph14 km/h	36%	41%	2
Sat 4p	Sunny	74°23° (likely 71°22° to 74°23°)	74°23°	0%	7 mph11 km/h from SSE, gusts 9 mph14 km/h	36%	15%	1
Sat 5p	Sunny	72°22° (likely 68°20° to 73°23°)	72°22°	0%	6 mph10 km/h from SSE, gusts 10 mph16 km/h	39%	16%	0
Sat 6p	Partly cloudy	68°20° (likely 63°17° to 68°20°)	68°20°	0%	6 mph10 km/h from SSE, gusts 9 mph15 km/h	44%	50%	0
Sat 7p	Partly cloudy	63°17° (likely 61°16° to 64°18°)	63°17°	0%	5 mph8 km/h from SE, gusts 9 mph15 km/h	52%	44%	0
Sat 8p	Clear	59°15° (likely 59°15° to 61°16°)	59°15°	0%	5 mph8 km/h from SE, gusts 10 mph16 km/h	63%	30%	0
Sat 9p	Clear	57°14° (likely 57°14° to 59°15°)	57°14°	0%	5 mph8 km/h from SE, gusts 10 mph16 km/h	65%	29%	0
Sat 10p	Clear	56°13° (likely 56°13° to 58°14°)	56°13°	0%	5 mph8 km/h from SE, gusts 9 mph15 km/h	66%	0%	0
Sat 11p	Clear	54°12° (likely 54°12° to 56°13°)	54°12°	0%	3 mph5 km/h from SE, gusts 10 mph16 km/h	71%	0%	0
Sun 12a	Clear	53°12° (likely 53°12° to 55°13°)	53°12°	0%	3 mph5 km/h from SE, gusts 12 mph19 km/h	73%	56%	0
Sun 1a	Mostly clear	52°11° (likely 52°11° to 54°12°)	52°11°	0%	3 mph5 km/h from SSE, gusts 11 mph17 km/h	76%	40%	0
Sun 2a	Mostly clear	51°11° (likely 51°11° to 53°12°)	51°11°	0%	3 mph5 km/h from SSE, gusts 10 mph16 km/h	78%	60%	0
Sun 3a	Clear	50°10° (likely 50°10° to 53°12°)	49°9°	0%	3 mph5 km/h from SE, gusts 9 mph15 km/h	81%	40%	0
Sun 4a	Cloudy	49°9° (likely 49°9° to 52°11°)	48°9°	0%	3 mph5 km/h from SE, gusts 8 mph13 km/h	81%	84%	0
Sun 5a	Cloudy	48°9° (likely 48°9° to 51°11°)	47°8°	0%	3 mph5 km/h from SE, gusts 8 mph12 km/h	84%	85%	0
Sun 6a	Mostly clear	48°9° (likely 48°9° to 50°10°)	47°8°	0%	3 mph5 km/h from SE, gusts 8 mph12 km/h	84%	52%	0
Sun 7a	Cloudy	47°8° (likely 47°8° to 50°10°)	46°8°	0%	3 mph5 km/h from SE, gusts 8 mph13 km/h	88%	88%	0
Sun 8a	Mostly sunny	49°9° (likely 48°9° to 51°11°)	48°9°	0%	3 mph5 km/h from SE, gusts 8 mph13 km/h	83%	80%	0
Sun 9a	Mostly sunny	56°13° (likely 54°12° to 56°13°)	56°13°	0%	5 mph8 km/h from SSE, gusts 8 mph13 km/h	72%	69%	1
Sun 10a	Cloudy	62°17° (likely 59°15° to 62°17°)	62°17°	0%	5 mph8 km/h from S, gusts 11 mph17 km/h	61%	63%	2
Sun 11a	Mostly sunny	68°20° (likely 64°18° to 69°21°)	68°20°	0%	5 mph8 km/h from S, gusts 10 mph16 km/h	51%	63%	3
Sun 12p	Cloudy	72°22° (likely 68°20° to 73°23°)	72°22°	0%	5 mph8 km/h from S, gusts 8 mph13 km/h	44%	80%	4
Sun 1p	Partly sunny	74°23° (likely 71°22° to 75°24°)	74°23°	0%	5 mph8 km/h from S, gusts 7 mph11 km/h	40%	76%	4
Sun 2p	Cloudy	76°24° (likely 73°23° to 77°25°)	76°24°	0%	5 mph8 km/h from SSE, gusts 6 mph10 km/h	37%	77%	4
Sun 3p	Cloudy	77°25° (likely 73°23° to 78°26°)	77°25°	0%	5 mph8 km/h from SSE, gusts 6 mph9 km/h	35%	80%	3
Sun 4p	Cloudy	77°25° (likely 73°23° to 78°26°)	77°25°	0%	5 mph8 km/h from SSE, gusts 6 mph9 km/h	35%	80%	2
Sun 5p	Cloudy	75°24° (likely 70°21° to 77°25°)	75°24°	0%	3 mph5 km/h from SSE, gusts 6 mph9 km/h	39%	81%	1
Sun 6p	Cloudy	71°22° (likely 65°18° to 72°22°)	71°22°	0%	3 mph5 km/h from SE, gusts 4 mph7 km/h	44%	82%	0
Sun 7p	Cloudy	66°19° (likely 63°17° to 67°19°)	66°19°	0%	2 mph3 km/h from SE, gusts 5 mph8 km/h	52%	82%	0
Sun 8p	Cloudy	61°16° (likely 61°16° to 64°18°)	61°16°	0%	2 mph3 km/h from SE, gusts 5 mph9 km/h	63%	78%	0
Sun 9p	Cloudy	59°15° (likely 59°15° to 62°17°)	59°15°	0%	2 mph3 km/h from SSE, gusts 6 mph9 km/h	65%	72%	0
Sun 10p	Cloudy	57°14° (likely 57°14° to 61°16°)	57°14°	0%	2 mph3 km/h from SSE, gusts 7 mph11 km/h	69%	67%	0
Sun 11p	Partly cloudy	56°13° (likely 56°13° to 59°15°)	56°13°	0%	2 mph3 km/h from SSE, gusts 7 mph11 km/h	71%	72%	0
Mon 12a	Cloudy	55°13° (likely 55°13° to 57°14°)	55°13°	0%	1 mph2 km/h from SSE, gusts 7 mph11 km/h	73%	79%	0
Mon 1a	Cloudy	54°12° (likely 54°12° to 56°13°)	54°12°	0%	1 mph2 km/h from SSE, gusts 6 mph10 km/h	77%	81%	0
Mon 2a	Cloudy	53°12° (likely 53°12° to 55°13°)	53°12°	0%	1 mph2 km/h from SSE, gusts 6 mph10 km/h	80%	84%	0
Mon 3a	Cloudy	52°11° (likely 52°11° to 55°13°)	52°11°	0%	1 mph2 km/h from SSE, gusts 6 mph10 km/h	81%	82%	0
Mon 4a	Cloudy	51°11° (likely 51°11° to 54°12°)	51°11°	0%	1 mph2 km/h from SSE, gusts 5 mph8 km/h	83%	80%	0
Mon 5a	Cloudy	50°10° (likely 50°10° to 52°11°)	50°10°	0%	1 mph2 km/h from SSE, gusts 5 mph8 km/h	86%	90%	0
Mon 6a	Cloudy	50°10° (likely 50°10° to 52°11°)	50°10°	0%	1 mph2 km/h from SSE, gusts 4 mph7 km/h	85%	90%	0
Mon 7a	Cloudy	49°9° (likely 49°9° to 52°11°)	49°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	89%	79%	0
Mon 8a	Cloudy	50°10° (likely 50°10° to 53°12°)	50°10°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	86%	89%	0
Mon 9a	Cloudy	56°13° (likely 55°13° to 58°14°)	56°13°	0%	1 mph2 km/h from SSE, gusts 5 mph8 km/h	75%	84%	1
Mon 10a	Mostly cloudy	63°17° (likely 62°17° to 63°17°)	63°17°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	63%	85%	2
Mon 11a	Cloudy	69°21° (likely 67°19° to 70°21°)	69°21°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	52%	91%	2
Mon 12p	Cloudy	72°22° (likely 70°21° to 73°23°)	72°22°	0%	2 mph3 km/h from S, gusts 6 mph9 km/h	46%	98%	3
Mon 1p	Cloudy	74°23° (likely 73°23° to 76°24°)	74°23°	0%	2 mph3 km/h from S, gusts 6 mph10 km/h	43%	96%	4
Mon 2p	Cloudy	76°24° (likely 73°23° to 76°24°)	76°24°	0%	2 mph3 km/h from S, gusts 6 mph10 km/h	40%	97%	3

Days ahead

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

Today, Oct 24. Cloudy. High 74°23°, low 47°8°. Typical 62°17° / 40°4°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
2. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 74. South southeast wind around 8 mph.
Tonight: Mostly clear, with a low around 47. Southeast wind around 6 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
71°22°–74°23°
Low, likely
47°8°–49°9°
Typical high / low
62°17° / 40°4°
Wind
10 mph16 km/h, gusts 17 mph27 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 77°25°, low 49°9°. Typical 62°17° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 77. 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.
High, likely
73°23°–78°26°
Low, likely
47°8°–50°10°
Typical high / low
62°17° / 39°4°
Wind
7 mph11 km/h, gusts 17 mph28 km/h
UV peak
4
Monday, Oct 26. Cloudy. High 77°25°, low 49°9°. Typical 61°16° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  Dry
Official NWS forecast
Day: Partly sunny, with a high near 77. South southeast wind 0 to 3 mph.
Night: Partly cloudy, with a low around 49. Southeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
73°23°–77°25°
Low, likely
49°9°–52°11°
Typical high / low
61°16° / 39°4°
Wind
6 mph10 km/h, gusts 12 mph19 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 76°24°, low 52°11°. Typical 60°16° / 38°3°. Dry. Mostly 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, 64°18°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 57°14°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 76. South southeast wind 2 to 7 mph.
Night: Mostly cloudy, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–76°24°
Low, likely
49°9°–57°14°
Typical high / low
60°16° / 38°3°
Wind
12 mph19 km/h, gusts 22 mph35 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 79°26°, low 55°13°. Typical 60°16° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 65°18°
  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 79.
Night: Mostly clear, with a low around 55.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
73°23°–79°26°
Low, likely
53°12°–57°14°
Typical high / low
60°16° / 38°3°
Wind
13 mph21 km/h, gusts 24 mph39 km/h
UV peak
2
Thursday, Oct 29. Mostly sunny. High 81°27°, low 55°13°. Typical 59°15° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 60°16°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 68°20°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 60°16°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 81.
Night: Mostly clear, with a low around 55.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
75°24°–81°27°
Low, likely
55°13°–59°15°
Typical high / low
59°15° / 38°3°
Wind
13 mph21 km/h, gusts 26 mph41 km/h
UV peak
3
Friday, Oct 30. Cloudy. High 80°27°, low 57°14°. Typical 59°15° / 37°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 61°16°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 78°25°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 69°20°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 61°16°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 80.
Night: Mostly cloudy, with a low around 57.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
75°24°–80°27°
Low, likely
57°14°–60°16°
Typical high / low
59°15° / 37°3°
Wind
15 mph25 km/h, gusts 26 mph42 km/h
UV peak
3
Saturday, Oct 31. Drizzle. High 72°22°, low 60°16°. Typical 58°14° / 37°3°. Rain 0.18 in4.6 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 61°16°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 74°23°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 65°19°
  40% chance · 0.07 in1.8 mm
4. Overnight
  midnight–6 AM
  Drizzle, 63°17°
  40% chance · 0.18 in4.5 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
69°21°–74°23°
Low, likely
57°14°–62°17°
Typical high / low
58°14° / 37°3°
Wind
24 mph38 km/h
UV peak
2
Sunday, Nov 1. Drizzle. High 69°21°, low 58°14°. Typical 58°14° / 37°3°. Rain 0.62 in16 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 64°18°
  50% chance · 0.11 in2.9 mm
2. Afternoon
  noon–6 PM
  Drizzle, 70°21°
  40% chance · 0.15 in3.8 mm
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  40% chance · 0.22 in5.5 mm
4. Overnight
  midnight–6 AM
  Drizzle, 51°11°
  40% chance · 0.01 in0.3 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
67°19°–70°21°
Low, likely
55°13°–62°17°
Typical high / low
58°14° / 37°3°
Wind
23 mph38 km/h, gusts 42 mph68 km/h
UV peak
2
Monday, Nov 2. Showers. High 60°16°, low 48°9°. Typical 57°14° / 36°2°. Rain 0.44 in11 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Showers, 50°10°
  40% chance · 0.13 in3.3 mm
2. Afternoon
  noon–6 PM
  Showers, 55°13°
  40% chance · 0.26 in6.7 mm
3. Evening
  6 PM–midnight
  Drizzle, 53°11°
  40% chance · 0.12 in3 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
53°12°–69°21°
Low, likely
36°2°–64°18°
Typical high / low
57°14° / 36°2°
Wind
23 mph37 km/h, gusts 43 mph68 km/h

10 days15 days30 days

The outlook

Today
Dry, high 74°, low 47°.
Tomorrow
Dry, high 77°, low 49°, warming up.
Monday
Dry, high 77°, low 49°.
Rest of week
Highs 60–81°; 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

Illinois River near Havana

21 mi

Below flood stage

Level: 6.9 ft
Flow: 7,610 cfs

Forecast peak 6.9 ft Sat 7 PM

Reading from Sat 1:45 PM · NWS gauge page

Salt Creek (IL) near Greenview

5.3 mi

Below flood stage

Level: 1.3 ft
Flow: 197 cfs

Reading from Sat 1:45 PM · NWS gauge page

Sangamon River at Petersburg

15 mi

Below flood stage

Level: 4.3 ft
Flow: 121 cfs

Reading from Sat 1:15 PM · NWS gauge page

Sangamon River near Oakford

16 mi

Below flood stage

Level: 456 ft
Flow: 538 cfs

Reading from Sat 1:45 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 14Typical 109

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 43°F).

Open the windows?

Today, 4:00 PM–7:00 PM

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

Is this typical?

Petersburg 1e · official normals 1991–2020 · records 2014–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

On average 7°4° colder than normal (daily mean temperature).

−6°−4°SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

Mason City weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 47 min; Losing 2 min 25 s a day; shortest Dec 21, 1 h 28 min less
Golden hour: 5:28–6:23 PM; Morning 7:02–7:56 AM
Blue hour: 6:23–6:33 PM; Morning 6:51–7:02 AM; first light 6:51 AM

Stars tonight? Fair

Mostly clear 10 PM–12 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:33 AM · rises 5:03 PM
Full moon: Oct 25
New moon: Nov 9

Looking west from Mason City. The highest point on the skyline is about 1,800 ft, 26 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Mason City, 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 near Havana

Salt Creek (IL) near Greenview

Sangamon River at Petersburg

Sangamon River near Oakford

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