Plainfield, IA Weather & Growing Conditions
Tonight
48°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 48, with temperatures rising to around 52 overnight. South wind 7 to 10 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Chance Rain Showers | 7 to 10 mph S | 32% |
| Wednesday | 53°F | Rain Showers Likely | 12 to 17 mph WSW | 69% |
| Wednesday Night | 43°F | Rain Showers Likely | 12 to 15 mph WSW | 67% |
| Thursday | 51°F | Rain Showers Likely | 14 mph NW | 72% |
| Thursday Night | 37°F | Mostly Cloudy | 8 to 13 mph N | 10% |
| Friday | 49°F | Partly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 31°F | Partly Cloudy | 0 to 3 mph N | 0% |
| Saturday | 53°F | Mostly Sunny | 0 to 6 mph WSW | 2% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 5% |
| Sunday | 58°F | Sunny | 5 to 9 mph WNW | 8% |
| Sunday Night | 36°F | Mostly Clear | 6 mph SW | 2% |
| Monday | 61°F | Mostly Sunny | 6 to 14 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 7 mph WNW | 0% |
| Tuesday | 59°F | Sunny | 5 to 8 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Plainfield, IA
Last spring frost
Apr 29
First fall frost
Oct 9
Growing season
162 days
Hardiness zone
5a
Explore more for Plainfield, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Tripoli, Ia (12.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.