Oelwein, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oelwein, a city in Fayette County, Iowa.
Overnight
49°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 49, with temperatures rising to around 53 overnight. West wind around 13 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Oelwein
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Chance Rain Showers | 13 mph W | 25% |
| Wednesday | 52°F | Rain Showers Likely | 13 to 17 mph W | 56% |
| Wednesday Night | 44°F | Rain Showers Likely | 16 mph W | 56% |
| Thursday | 51°F | Rain Showers Likely | 14 mph NW | 56% |
| Thursday Night | 37°F | Slight Chance Rain Showers then Mostly Cloudy | 9 to 13 mph N | 16% |
| Friday | 46°F | Mostly Sunny | 5 to 10 mph N | 2% |
| Friday Night | 28°F | Mostly Clear | 3 mph N | 0% |
| Saturday | 49°F | Sunny | 1 to 6 mph W | 1% |
| Saturday Night | 34°F | Mostly Clear | 6 mph W | 1% |
| Sunday | 54°F | Sunny | 6 to 9 mph W | 3% |
| Sunday Night | 36°F | Clear | 6 mph SW | 0% |
| Monday | 59°F | Sunny | 6 to 12 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 8 mph W | 0% |
| Tuesday | 58°F | Sunny | 6 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Oelwein (42.672, -91.913). Updated through the day.
Growing snapshot for Oelwein
Last spring frost
Apr 30
First fall frost
Oct 9
Growing season
163 days
Hardiness zone
5a
More local growing data for Oelwein: nearby ZIP 50662 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Arlington
Clermont
Elgin
Fayette
Hawkeye
Jackson Junction
Maynard
Randalia
St. Lucas
Stanley
Wadena
Waucoma
West Union
Westgate
Climate data from the nearest NOAA station, Oelwein 2 S, Ia (3.2 mi from Oelwein). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.