Charter Oak, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Charter Oak, a city in Crawford County, Iowa.
This Afternoon
56°F
Rain Showers
Rain showers. Cloudy. High near 56, with temperatures falling to around 52 in the afternoon. North northwest wind around 17 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Charter Oak
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Rain Showers | 17 mph NNW | 83% |
| Tonight | 38°F | Rain Showers | 15 mph NW | 84% |
| Wednesday | 48°F | Chance Rain Showers | 12 to 15 mph WNW | 42% |
| Wednesday Night | 37°F | Cloudy then Chance Rain Showers | 12 mph WNW | 53% |
| Thursday | 51°F | Chance Rain Showers | 8 to 12 mph NNW | 46% |
| Thursday Night | 34°F | Mostly Cloudy | 3 to 7 mph N | 3% |
| Friday | 50°F | Partly Sunny | 3 mph N | 0% |
| Friday Night | 31°F | Mostly Cloudy | 1 mph SE | 0% |
| Saturday | 57°F | Mostly Sunny | 1 to 6 mph SW | 2% |
| Saturday Night | 34°F | Mostly Clear | 3 mph W | 4% |
| Sunday | 61°F | Sunny | 2 to 6 mph WSW | 4% |
| Sunday Night | 37°F | Mostly Clear | 6 mph SSW | 0% |
| Monday | 63°F | Sunny | 6 to 9 mph WSW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Charter Oak (42.068, -95.590). Updated through the day.
Growing snapshot for Charter Oak
Last spring frost
May 3
First fall frost
Oct 1
Growing season
151 days
Hardiness zone
5a
More local growing data for Charter Oak: nearby ZIP 51439 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mapleton No.2, Ia (11.4 mi from Charter Oak). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.