Arthur, IA Weather & Growing Conditions
Today
74°F
Scattered Showers And Thunderstorms then Patchy Smoke
Scattered showers and thunderstorms before 9am, then patchy smoke and scattered showers and thunderstorms between 9am and 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. High near 74, with temperatures falling to around 71 in the afternoon. North northeast wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Scattered Showers And Thunderstorms then Patchy Smoke | 5 to 10 mph NNE | 74% |
| Tonight | 57°F | Patchy Smoke | 0 to 5 mph NE | 48% |
| Wednesday | 73°F | Partly Sunny | 0 to 5 mph ENE | 12% |
| 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 | 85°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 | 69°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 | 69°F | Chance Showers And Thunderstorms | 10 to 15 mph E | 25% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Arthur, IA
Last spring frost
Apr 27
First fall frost
Oct 12
Growing season
167 days
Hardiness zone
5a
Explore more for Arthur, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Ida Grove 5Nw, Ia (9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.