Oelwein, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oelwein, a city in Fayette County, Iowa.
Tonight
49°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 49, with temperatures rising to around 53 overnight. South wind around 12 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Oelwein
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Chance Rain Showers | 12 mph S | 32% |
| Wednesday | 52°F | Chance Rain Showers | 12 to 17 mph SW | 50% |
| Wednesday Night | 44°F | Rain Showers Likely | 13 to 16 mph SW | 62% |
| Thursday | 50°F | Rain Showers Likely | 13 mph NW | 74% |
| Thursday Night | 39°F | Mostly Cloudy | 13 mph N | 14% |
| Friday | 48°F | Partly Sunny | 5 to 12 mph N | 2% |
| Friday Night | 32°F | Partly Cloudy | 3 mph NW | 0% |
| Saturday | 51°F | Mostly Sunny | 1 to 6 mph W | 2% |
| Saturday Night | 35°F | Mostly Clear | 7 mph W | 4% |
| Sunday | 56°F | Sunny | 9 mph W | 10% |
| Sunday Night | 37°F | Mostly Clear | 5 to 8 mph SW | 2% |
| Monday | 59°F | Sunny | 8 to 13 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 8 mph W | 0% |
| Tuesday | 58°F | Sunny | 8 mph NW | 1% |
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.