Williamson, IA Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Williamson, IA.

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Current Conditions — Williamson, IA

CHARITON (KCNC)

Clear

60.8 F
Humidity:100%
Wind Speed:SE 12.8 mph
Barometer:29.66 in
Dewpoint:60.8 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 27 2026, 01:15 AM CDT
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5-Day Forecast — Williamson, IA

Monday

High 75 °F
T-storms
Monday
Night
Low 44 °F
Mostly Cloudy
Tuesday

High 60 °F
Mostly Cloudy
Tuesday
Night
Low 41 °F
Partly Cloudy
Wednesday

High 62 °F
Partly Sunny
Wednesday
Night
Low 41 °F
Mostly Clear
Thursday

High 64 °F
Isolated T-storm
Thursday
Night
Low 41 °F
Partly Cloudy
Friday

High 64 °F
Partly Sunny

Detailed Forecast — Williamson, IA

Monday
Thunderstorms. High near 75°F. Wind 16 to 21 mph, with gusts as high as 30 mph.
Monday Night
Mostly Cloudy. Low around 44°F. Wind 13 to 20 mph, with gusts as high as 29 mph.
Tuesday
Mostly Cloudy. High near 60°F. Wind 8 to 12 mph, with gusts as high as 18 mph.
Tuesday Night
Partly Cloudy. Low around 41°F. Wind 7 to 8 mph, with gusts as high as 13 mph.
Wednesday
Partly Sunny. High near 62°F. Wind 5 to 10 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly Clear. Low around 41°F. Wind around 3 mph, with gusts as high as 6 mph.
Thursday
Isolated T-storm. High near 64°F. Wind 7 to 10 mph, with gusts as high as 16 mph.
Thursday Night
Partly Cloudy. Low around 41°F. Wind around 5 mph, with gusts as high as 8 mph.
Friday
Partly Sunny. High near 64°F. Wind 5 to 9 mph, with gusts as high as 14 mph.
Friday Night
Mostly Clear. Low around 41°F. Wind around 5 mph, with gusts as high as 7 mph.
Saturday
Mostly Sunny. High near 68°F. Wind 6 to 7 mph, with gusts as high as 12 mph.
Saturday Night
Mostly Clear. Low around 46°F. Wind around 6 mph, with gusts as high as 9 mph.
Sunday
Partly Sunny. High near 73°F. Wind 7 to 9 mph, with gusts as high as 14 mph.
IA Radar
Current Radar • IA
Day 1 Outlook • April 27, 2026

Observation History — Williamson, IA

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
01:15 AM CDT SE 12.8 10.00 Clear -- 60.8 60.8 100% NA NA 29.66 1004.4
12:55 AM CDT 12.8 G 19.7 10.00 Clear -- 60.8 60.8 100% NA NA 29.68 1005.1
12:35 AM CDT SE 10.3 10.00 Clear -- 60.8 60.8 100% NA NA 29.68 1005.1
12:15 AM CDT SE 10.3 10.00 Clear -- 60.8 60.8 100% NA NA 29.70 1005.8
11:55 PM CDT 12.8 G 19.7 10.00 Clear -- 62.6 62.6 100% NA NA 29.70 1005.8
11:35 PM CDT 13.9 10.00 Clear -- 62.6 62.6 100% NA NA 29.70 1005.8
11:15 PM CDT SE 15.0 G 26.4 10.00 Clear -- 62.6 62.6 100% NA NA 29.70 1005.8
10:55 PM CDT SE 10.3 10.00 Clear -- 60.8 60.8 100% NA NA 29.71 1006.1
10:35 PM CDT 11.4 10.00 Clear -- 60.8 60.8 100% NA NA 29.71 1006.1
10:15 PM CDT 13.9 10.00 Clear -- 62.6 62.6 100% NA NA 29.72 1006.4
09:55 PM CDT 13.9 G 20.8 10.00 Mostly Clear -- 62.6 62.6 100% NA NA 29.73 1006.8
09:35 PM CDT SE 15.0 G 21.9 10.00 Mostly Cloudy -- 62.6 62.6 100% NA NA 29.74 1007.1
09:15 PM CDT SE 15.0 G 20.8 10.00 Partly Cloudy -- 62.6 62.6 100% NA NA 29.74 1007.1
08:55 PM CDT SE 15.0 G 24.2 7.00 Mostly Cloudy -- 62.6 62.6 100% NA NA 29.74 1007.1
08:35 PM CDT 17.2 G 27.7 7.00 Light Rain -- 62.6 62.6 100% NA NA 29.75 1007.5
08:15 PM CDT 15.0 6.00 Light Rain -- 64.4 % NA NA 29.75 1007.5
07:55 PM CDT SE 13.9 G 21.9 5.00 Light Rain -- 66.2 55.4 68% NA NA 29.75 1007.5
07:35 PM CDT SE 13.9 G 20.8 10.00 Partly Cloudy -- 68.0 53.6 60% NA NA 29.74 1007.1
07:15 PM CDT SE 12.8 G 19.7 NULL Clear -- 68.0 53.6 60% NA NA 29.74 1007.1
06:55 PM CDT SE 13.9 10.00 Clear -- 69.8 53.6 56% NA NA 29.75 1007.5
06:35 PM CDT SE 12.8 G 18.3 10.00 Clear -- 69.8 53.6 56% NA NA 29.77 1008.1
06:15 PM CDT 11.4 10.00 Clear -- 69.8 53.6 56% NA NA 29.77 1008.1
05:55 PM CDT 13.9 10.00 Mostly Clear -- 71.6 53.6 53% NA 70.9 29.76 1007.8
05:35 PM CDT 12.8 10.00 Mostly Clear -- 71.6 53.6 53% NA 70.9 29.76 1007.8

Regional Weather Observation

CHARITON (KCNC)

Clear
60.8 F

OSCEOLA MUNI (KI75)

Clear
60.8 F

KNOXVILLE (KOXV)

Clear
64.4 F

DES MOINES (KDSM)

Mostly Clear
62.6 F

ANKENY (KIKV)

Partly Cloudy
62.6 F

NEWTON MUNI (KTNU)

Clear
62.6 F
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