Arthur, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arthur, a city in Ida County, Iowa.
Tonight
66°F
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers and thunderstorms likely before 10pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66. South southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Arthur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 to 10 mph SSW | 56% |
| Saturday | 74°F | Patchy Fog then Mostly Cloudy | 5 mph N | 36% |
| Saturday Night | 58°F | Slight Chance Rain Showers | 5 to 10 mph NNE | 16% |
| Sunday | 65°F | Chance Rain Showers | 10 mph NE | 27% |
| Sunday Night | 54°F | Chance Rain Showers | 10 mph ENE | 54% |
| Monday | 59°F | Showers And Thunderstorms Likely | 10 mph ENE | 64% |
| Monday Night | 49°F | Chance Showers And Thunderstorms | 5 mph ENE | 53% |
| Tuesday | 61°F | Mostly Cloudy | 5 mph E | 8% |
| Tuesday Night | 46°F | Partly Cloudy | 0 to 5 mph ESE | 1% |
| Wednesday | 65°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Wednesday Night | 51°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph SE | 20% |
| Thursday | 66°F | Chance Rain Showers | 0 to 5 mph SSE | 26% |
| Thursday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 0 mph | 16% |
| Friday | 68°F | Slight Chance Rain Showers then Partly Sunny | 0 to 5 mph SE | 16% |
Forecast source: National Weather Service (api.weather.gov) for Arthur (42.335, -95.347). Updated through the day.
Growing snapshot for Arthur
Last spring frost
Apr 27
First fall frost
Oct 12
Growing season
167 days
Hardiness zone
5a
More local growing data for Arthur: nearby ZIP 51431 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ida Grove 5Nw, Ia (9 mi from Arthur). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.