Anthon, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Anthon, a city in Woodbury County, Iowa.
Overnight
65°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. Low around 65, with temperatures rising to around 68 overnight. North northwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Anthon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Chance Showers And Thunderstorms | 5 mph NNW | 27% |
| Tuesday | 73°F | Slight Chance Showers And Thunderstorms then Patchy Smoke | 5 to 10 mph N | 76% |
| Tuesday Night | 57°F | Patchy Smoke then Mostly Cloudy | 0 to 5 mph NNE | 66% |
| Wednesday | 74°F | Partly Sunny | 0 to 5 mph ENE | 9% |
| Wednesday Night | 54°F | Mostly Clear | 0 to 5 mph SE | 1% |
| Thursday | 81°F | Sunny | 0 to 5 mph S | 1% |
| Thursday Night | 61°F | Mostly Clear | 5 mph SSE | 1% |
| Friday | 86°F | Sunny | 5 to 10 mph S | 3% |
| Friday Night | 66°F | Mostly Clear | 5 to 10 mph S | 9% |
| Saturday | 91°F | Sunny | 5 to 15 mph SSE | 3% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph SSE | 20% |
| Sunday | 90°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SE | 17% |
| Sunday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 mph SE | 23% |
| Monday | 90°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph ESE | 23% |
Forecast source: National Weather Service (api.weather.gov) for Anthon (42.388, -95.866). Updated through the day.
Growing snapshot for Anthon
Last spring frost
May 3
First fall frost
Oct 1
Growing season
151 days
Hardiness zone
5a
More local growing data for Anthon: nearby ZIP 51004 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Bronson
Climbing Hill
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Danbury
Hornick
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Oto
Pierson
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Sergeant Bluff
Sioux City
Sloan
Smithland
Climate data from the nearest NOAA station, Mapleton No.2, Ia (16.6 mi from Anthon). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.