Arthur, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arthur, a city in Ida County, Iowa.
This Afternoon
56°F
Rain Showers Likely
Rain showers likely. Cloudy. High near 56, with temperatures falling to around 50 in the afternoon. North northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Arthur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Rain Showers Likely | 15 mph NNW | 63% |
| Tonight | 40°F | Rain Showers | 15 mph NW | 78% |
| Wednesday | 48°F | Rain Showers Likely | 15 mph WNW | 55% |
| Wednesday Night | 39°F | Rain Showers Likely | 10 mph WNW | 64% |
| Thursday | 50°F | Chance Rain Showers | 10 mph NNW | 52% |
| Thursday Night | 35°F | Mostly Cloudy | 5 to 10 mph N | 3% |
| Friday | 50°F | Partly Sunny | 0 to 5 mph N | 0% |
| Friday Night | 32°F | Mostly Cloudy | 0 mph | 0% |
| Saturday | 56°F | Mostly Sunny | 0 to 5 mph WSW | 2% |
| Saturday Night | 36°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 61°F | Sunny | 5 mph WSW | 5% |
| Sunday Night | 39°F | Mostly Clear | 5 mph SSW | 0% |
| Monday | 63°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph NW | 0% |
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 Nov 3, 2026.