Arthur, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arthur, a city in Ida County, Iowa.
Today
72°F
Patchy Smoke
Patchy smoke and scattered showers and thunderstorms before 1pm, then patchy smoke and a chance of showers and thunderstorms between 1pm and 5pm, then patchy smoke and scattered showers and thunderstorms. Mostly cloudy, with a high near 72. North wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Arthur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Patchy Smoke | 10 mph N | 74% |
| Tonight | 57°F | Patchy Smoke | 0 to 5 mph NNE | 48% |
| Wednesday | 73°F | Partly Sunny | 0 to 5 mph ENE | 13% |
| Wednesday Night | 53°F | Mostly Clear | 0 to 5 mph SE | 2% |
| Thursday | 81°F | Sunny | 0 to 5 mph SSE | 1% |
| Thursday Night | 61°F | Mostly Clear | 5 mph SSE | 3% |
| Friday | 86°F | Sunny | 5 to 10 mph SSW | 3% |
| Friday Night | 66°F | Mostly Clear | 5 to 10 mph S | 12% |
| Saturday | 90°F | Sunny | 5 to 15 mph S | 6% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SSE | 18% |
| Sunday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SSE | 17% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 10 mph SE | 27% |
| Monday | 89°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SE | 27% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 24% |
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 Aug 4, 2026.