Plainfield, IA Weather & Growing Conditions
This Afternoon
73°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 73, with temperatures falling to around 70 in the afternoon. Northeast wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Showers And Thunderstorms Likely | 7 mph NE | 57% |
| Tonight | 58°F | Chance Showers And Thunderstorms | 7 to 13 mph NNE | 38% |
| Sunday | 66°F | Chance Rain Showers then Slight Chance Drizzle | 14 to 17 mph NE | 28% |
| Sunday Night | 51°F | Cloudy then Chance Rain Showers | 12 to 15 mph ENE | 41% |
| Monday | 60°F | Rain Showers Likely | 16 mph NE | 65% |
| Monday Night | 47°F | Rain Showers Likely | 9 to 13 mph NE | 65% |
| Tuesday | 60°F | Chance Rain Showers then Partly Sunny | 10 mph ENE | 25% |
| Tuesday Night | 44°F | Partly Cloudy | 7 mph ENE | 2% |
| Wednesday | 64°F | Mostly Sunny | 7 mph ENE | 0% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph E | 5% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph ESE | 16% |
| Thursday Night | 53°F | Slight Chance Rain Showers | 3 mph ESE | 19% |
| Friday | 69°F | Partly Sunny | 2 to 6 mph ESE | 13% |
| Friday Night | 54°F | Mostly Cloudy | 5 mph ESE | 8% |
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 Sep 19, 2026.