Observed 7:53 AM CDT at KMIW

Union, IA weather

Sunny and 56°13°, 19°11° warmer than a typical Oct 24.

Mostly agree

Now 56°13°

Sunny

Wind: 10 mph17 km/h; From the south-southeast. Gusts to 22 mph35 km/h around 10 AM
Dew point: 48°9°; Comfortable
UV index: 0Low; Moderate 12–3 PM · peak 4
Pressure: 30.25 inHg1024 hPa; Rising slowly · +0.03 inHg+1.0 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 (54°12° then, 56°13° now)

Good hours for

Above 70°21° today by noon
High 76°24° today at 3 PM
Low 54°12° tomorrow at 6 AM

This morningUp to 67°19° by 11 AM · Partly cloudy
This afternoonUp to 76°24° by 3 PM · Partly cloudy
TonightDown to 55°13° by 5 AM · Mostly cloudy
Tomorrow morningUp to 65°18° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 74°23° by 4 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
Sat 8a	Sunny	56°13° (likely 56°13° to 58°14°)	56°13°	0%	8 mph13 km/h from SSE, gusts 15 mph24 km/h	74%	41%	0
Sat 9a	Partly sunny	58°14° (likely 58°14° to 60°16°)	58°14°	0%	8 mph13 km/h from S, gusts 20 mph33 km/h	72%	29%	0
Sat 10a	Partly sunny	62°17° (likely 62°17° to 66°19°)	62°17°	0%	9 mph14 km/h from S, gusts 22 mph35 km/h	62%	41%	1
Sat 11a	Cloudy	67°19° (likely 66°19° to 69°21°)	67°19°	0%	10 mph16 km/h from S, gusts 20 mph33 km/h	54%	63%	2
Sat 12p	Mostly sunny	70°21° (likely 69°21° to 73°23°)	70°21°	0%	10 mph16 km/h from S, gusts 20 mph32 km/h	49%	25%	3
Sat 1p	Cloudy	73°23° (likely 71°22° to 76°24°)	73°23°	0%	10 mph16 km/h from S, gusts 19 mph30 km/h	44%	60%	4
Sat 2p	Partly sunny	75°24° (likely 73°23° to 78°26°)	75°24°	0%	12 mph19 km/h from S, gusts 19 mph31 km/h	41%	29%	3
Sat 3p	Partly sunny	76°24° (likely 74°23° to 79°26°)	76°24°	0%	12 mph19 km/h from S, gusts 20 mph32 km/h	40%	23%	2
Sat 4p	Mostly cloudy	76°24° (likely 74°23° to 78°26°)	76°24°	0%	12 mph19 km/h from S, gusts 19 mph30 km/h	40%	55%	1
Sat 5p	Cloudy	75°24° (likely 72°22° to 77°25°)	75°24°	0%	9 mph14 km/h from S, gusts 17 mph28 km/h	43%	62%	1
Sat 6p	Mostly cloudy	72°22° (likely 69°21° to 75°24°)	72°22°	0%	7 mph11 km/h from S, gusts 14 mph23 km/h	48%	58%	0
Sat 7p	Mostly cloudy	68°20° (likely 67°19° to 73°23°)	68°20°	0%	6 mph10 km/h from S, gusts 10 mph16 km/h	57%	56%	0
Sat 8p	Cloudy	65°18° (likely 64°18° to 71°22°)	65°18°	0%	5 mph8 km/h from S, gusts 11 mph18 km/h	63%	66%	0
Sat 9p	Mostly cloudy	63°17° (likely 63°17° to 68°20°)	63°17°	0%	5 mph8 km/h from S, gusts 14 mph23 km/h	67%	47%	0
Sat 10p	Cloudy	62°17° (likely 62°17° to 65°18°)	62°17°	0%	5 mph8 km/h from S, gusts 13 mph21 km/h	70%	80%	0
Sat 11p	Cloudy	60°16° (likely 60°16° to 63°17°)	60°16°	0%	3 mph5 km/h from S, gusts 10 mph15 km/h	75%	79%	0
Sun 12a	Cloudy	59°15° (likely 59°15° to 61°16°)	59°15°	0%	3 mph5 km/h from N, gusts 8 mph12 km/h	78%	78%	0
Sun 1a	Cloudy	59°15° (likely 59°15° to 60°16°)	59°15°	5%	3 mph5 km/h from N, gusts 10 mph16 km/h	78%	80%	0
Sun 2a	Cloudy	57°14° (likely 56°13° to 59°15°)	57°14°	5%	2 mph3 km/h from N, gusts 10 mph16 km/h	83%	81%	0
Sun 3a	Cloudy	57°14° (likely 55°13° to 59°15°)	57°14°	5%	2 mph3 km/h from N, gusts 10 mph16 km/h	80%	81%	0
Sun 4a	Cloudy	56°13° (likely 54°12° to 59°15°)	56°13°	5%	2 mph3 km/h from N, gusts 9 mph14 km/h	83%	79%	0
Sun 5a	Cloudy	55°13° (likely 53°12° to 58°14°)	55°13°	5%	2 mph3 km/h from NNE, gusts 10 mph16 km/h	83%	71%	0
Sun 6a	Partly cloudy	54°12° (likely 51°11° to 57°14°)	54°12°	0%	2 mph3 km/h from NNE, gusts 10 mph16 km/h	86%	50%	0
Sun 7a	Mostly cloudy	54°12° (likely 50°10° to 57°14°)	54°12°	0%	2 mph3 km/h from NNE, gusts 10 mph17 km/h	90%	65%	0
Sun 8a	Partly sunny	53°12° (likely 50°10° to 56°13°)	53°12°	0%	1 mph2 km/h from NE, gusts 11 mph18 km/h	93%	71%	0
Sun 9a	Cloudy	56°13° (likely 53°12° to 57°14°)	56°13°	0%	2 mph3 km/h from SSE, gusts 12 mph19 km/h	83%	80%	0
Sun 10a	Partly sunny	61°16° (likely 57°14° to 61°16°)	61°16°	0%	2 mph3 km/h from SSE, gusts 10 mph16 km/h	72%	63%	1
Sun 11a	Cloudy	65°18° (likely 61°16° to 65°18°)	65°18°	0%	2 mph3 km/h from S, gusts 9 mph14 km/h	63%	75%	2
Sun 12p	Cloudy	68°20° (likely 63°17° to 68°20°)	68°20°	0%	2 mph3 km/h from S, gusts 9 mph14 km/h	59%	73%	3
Sun 1p	Cloudy	71°22° (likely 66°19° to 71°22°)	71°22°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	53%	72%	4
Sun 2p	Cloudy	72°22° (likely 67°19° to 73°23°)	72°22°	0%	1 mph2 km/h from SW, gusts 8 mph13 km/h	51%	74%	4
Sun 3p	Cloudy	73°23° (likely 67°19° to 74°23°)	73°23°	0%	1 mph2 km/h from SSW, gusts 9 mph14 km/h	49%	76%	3
Sun 4p	Cloudy	74°23° (likely 67°19° to 74°23°)	74°23°	0%	1 mph2 km/h from S, gusts 11 mph17 km/h	48%	77%	2
Sun 5p	Partly sunny	72°22° (likely 65°18° to 73°23°)	72°22°	0%	2 mph3 km/h from ENE, gusts 12 mph20 km/h	51%	74%	1
Sun 6p	Cloudy	70°21° (likely 62°17° to 70°21°)	70°21°	0%	2 mph3 km/h from NE, gusts 13 mph22 km/h	53%	70%	0
Sun 7p	Cloudy	66°19° (likely 60°16° to 66°19°)	66°19°	0%	3 mph5 km/h from NE, gusts 15 mph23 km/h	61%	65%	0
Sun 8p	Cloudy	61°16° (likely 57°14° to 64°18°)	61°16°	0%	5 mph8 km/h from NE, gusts 16 mph26 km/h	67%	62%	0
Sun 9p	Mostly cloudy	58°14° (likely 55°13° to 62°17°)	58°14°	0%	6 mph10 km/h from NE, gusts 17 mph27 km/h	75%	64%	0
Sun 10p	Cloudy	57°14° (likely 53°12° to 61°16°)	57°14°	0%	6 mph10 km/h from NNE, gusts 17 mph27 km/h	75%	71%	0
Sun 11p	Cloudy	55°13° (likely 52°11° to 60°16°)	55°13°	0%	6 mph10 km/h from NNE, gusts 16 mph26 km/h	80%	74%	0
Mon 12a	Cloudy	54°12° (likely 52°11° to 59°15°)	54°12°	0%	6 mph10 km/h from NE, gusts 16 mph25 km/h	80%	84%	0
Mon 1a	Cloudy	53°12° (likely 51°11° to 59°15°)	53°12°	0%	6 mph10 km/h from NE, gusts 15 mph25 km/h	69%	88%	0
Mon 2a	Cloudy	52°11° (likely 49°9° to 59°15°)	52°11°	0%	6 mph10 km/h from NE, gusts 14 mph23 km/h	69%	91%	0
Mon 3a	Cloudy	51°11° (likely 48°9° to 58°14°)	51°11°	0%	6 mph10 km/h from NE, gusts 14 mph23 km/h	68%	91%	0
Mon 4a	Cloudy	51°11° (likely 48°9° to 57°14°)	51°11°	0%	6 mph10 km/h from NE, gusts 15 mph24 km/h	68%	84%	0
Mon 5a	Cloudy	50°10° (likely 48°9° to 56°13°)	48°9°	0%	6 mph10 km/h from NE, gusts 15 mph24 km/h	68%	86%	0
Mon 6a	Cloudy	49°9° (likely 48°9° to 55°13°)	47°8°	0%	6 mph10 km/h from NE, gusts 15 mph24 km/h	71%	95%	0
Mon 7a	Cloudy	49°9° (likely 48°9° to 54°12°)	47°8°	5%	6 mph10 km/h from NE, gusts 14 mph23 km/h	71%	95%	0

Days ahead

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

Today, Oct 24. Cloudy. High 77°25°, low 53°12°. Typical 58°14° / 36°2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 76°24°
  Dry
3. Evening
  6 PM–midnight
  Mostly cloudy, 65°18°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  Dry
Official NWS forecast
Today: Mostly sunny. High near 77, with temperatures falling to around 75 in the afternoon. South wind 8 to 12 mph, with gusts as high as 20 mph.
Tonight: Mostly cloudy. Low around 53, with temperatures rising to around 55 overnight. North northeast wind 2 to 7 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–79°26°
Low, likely
53°12°–58°14°
Typical high / low
58°14° / 36°2°
Wind
15 mph24 km/h, gusts 25 mph40 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 74°23°, low 49°9°. Typical 57°14° / 35°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Mostly cloudy, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Official NWS forecast
Day: Partly sunny. High near 74, with temperatures falling to around 72 in the afternoon. South southeast wind around 2 mph.
Night: Mostly cloudy, with a low around 49. Northeast wind 2 to 6 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
67°19°–74°23°
Low, likely
49°9°–54°12°
Typical high / low
57°14° / 35°2°
Wind
14 mph22 km/h, gusts 26 mph42 km/h
UV peak
4
Monday, Oct 26. Cloudy. High 67°19°, low 49°9°. Typical 57°14° / 35°2°. 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, 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: Mostly cloudy, with a high near 67. East northeast wind around 8 mph.
Night: Mostly cloudy, with a low around 49.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–71°22°
Low, likely
49°9°–54°12°
Typical high / low
57°14° / 35°2°
Wind
11 mph18 km/h, gusts 24 mph38 km/h
UV peak
3
Tuesday, Oct 27. Mostly cloudy. High 68°20°, low 52°11°. Typical 56°13° / 34°1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 59°15°
  20% chance · 0.01 in0.3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 68.
Night: A chance of rain showers after 7pm. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–69°21°
Low, likely
52°11°–56°13°
Typical high / low
56°13° / 34°1°
Wind
14 mph23 km/h, gusts 28 mph46 km/h
UV peak
2
Wednesday, Oct 28. Showers. High 70°21°, low 46°8°. Typical 56°13° / 34°1°. Rain 0.07 in1.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 59°15°
  20% chance · 0.02 in0.5 mm
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Partly sunny, with a high near 70. Chance of precipitation is 30%.
Night: A slight chance of rain showers. Partly cloudy, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–72°22°
Low, likely
46°8°–60°16°
Typical high / low
56°13° / 34°1°
Wind
15 mph24 km/h, gusts 34 mph54 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 67°19°, low 47°8°. Typical 55°13° / 34°1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 56°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers before 7am. Mostly sunny, with a high near 67.
Night: A chance of rain showers after 7pm. Partly cloudy, with a low around 47. Chance of precipitation is 30%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–72°22°
Low, likely
47°8°–58°14°
Typical high / low
55°13° / 34°1°
Wind
12 mph20 km/h, gusts 31 mph50 km/h
Friday, Oct 30. Showers. High 66°19°, low 47°8°. Typical 55°13° / 33°1°. Rain 0.06 in1.5 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 57°14°
  30% chance
2. Afternoon
  noon–6 PM
  Drizzle, 69°20°
  20% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Drizzle, 65°19°
  30% chance · 0.01 in0.4 mm
4. Overnight
  midnight–6 AM
  Cloudy, 60°16°
  40% chance · 0.04 in1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Partly sunny, with a high near 66. Chance of precipitation is 40%.
Night: A chance of rain showers. Mostly cloudy, with a low around 47.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–77°25°
Low, likely
47°8°–62°17°
Typical high / low
55°13° / 33°1°
Wind
16 mph26 km/h, gusts 31 mph50 km/h
UV peak
1
Saturday, Oct 31. Drizzle. High 66°19°, low 60°16°. Typical 54°12° / 33°1°. Rain 0.21 in5.3 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 61°16°
  50% chance
2. Afternoon
  noon–6 PM
  Rain, 66°19°
  50% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Rain, 62°17°
  50% chance · 0.09 in2.2 mm
4. Overnight
  midnight–6 AM
  Drizzle, 62°16°
  50% chance · 0.05 in1.1 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
61°16°–73°23°
Low, likely
54°12°–68°20°
Typical high / low
54°12° / 33°1°
Wind
17 mph27 km/h, gusts 36 mph58 km/h
UV peak
1
Sunday, Nov 1. Showers. High 64°18°, low 54°12°. Typical 54°12° / 32°0°. Rain 0.48 in12 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 61°16°
  40% chance · 0.16 in4.2 mm
2. Afternoon
  noon–6 PM
  Showers, 62°17°
  30% chance · 0.22 in5.6 mm
3. Evening
  6 PM–midnight
  Showers, 59°15°
  30% chance · 0.08 in2 mm
4. Overnight
  midnight–6 AM
  Showers, 52°11°
  30% chance · 0.2 in5 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°–69°21°
Low, likely
49°9°–60°16°
Typical high / low
54°12° / 32°0°
Wind
17 mph28 km/h, gusts 32 mph51 km/h
Monday, Nov 2. Showers. High 61°16°, low 53°12°. Typical 53°12° / 32°0°. Rain 0.44 in11 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 52°11°
  20% chance · 0.11 in2.8 mm
2. Afternoon
  noon–6 PM
  Mostly sunny, 57°14°
  20% chance · 0.02 in0.5 mm
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 differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
57°14°–67°19°
Low, likely
45°7°–62°17°
Typical high / low
53°12° / 32°0°
Wind
28 mph46 km/h, gusts 48 mph77 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 77°, low 53°.
Tomorrow
Dry, high 74°, low 49°, cooling off.
Monday
Dry, high 67°, low 49°, cooling off.
Rest of week
Highs 61–70°; chance of precipitation on Saturday, Sunday.

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

South Fork Iowa River near New Providence

6.8 mi

Below flood stage

Level: 4.2 ft
Flow: 336 cfs

Reading from Sat 7:45 AM · NWS gauge page

Iowa River at Steamboat Rock

11 mi

Below flood stage

Level: 6.0 ft
Flow: 460 cfs

Reading from Sat 7 AM · NWS gauge page

Iowa River at Marshalltown

15 mi

Below flood stage

Level: 12.1 ft
Flow: 1,780 cfs

Reading from Sat 8 AM · NWS gauge page

Timber Creek near Marshalltown

20 mi

Below flood stage

Level: 3.4 ft
Flow: 114 cfs

Reading from Sat 7 AM · NWS gauge page

For your home

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

Heating this week

About 92% less heating than a typical week.

This week 11Typical 138

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 48°F).

Open the windows?

Today, 10:00 AM–11:00 PM

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

Is this typical?

MARSHALLTOWN · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 19°11° warmer than typical.

Last 7 days vs normal

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

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

Sun & moon

Sun

Daylight: 10 h 41 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 35 min less
Golden hour: 5:37–6:34 PM; Morning 7:18–8:14 AM
Blue hour: 6:34–6:45 PM; Morning 7:07–7:18 AM; first light 7:07 AM

Stars tonight? Poor

Clouds most of the night (about 69% cover).

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:49 AM · rises 5:15 PM
Full moon: Oct 25
New moon: Nov 9

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

Union, IA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

South Fork Iowa River near New Providence

Iowa River at Steamboat Rock

Iowa River at Marshalltown

Timber Creek near Marshalltown

For your home

Heating this week

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Poor

Moon