Plainfield, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plainfield, a city in Bremer County, Iowa.
This Afternoon
67°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 67, with temperatures falling to around 64 in the afternoon. West southwest wind around 8 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Plainfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Showers And Thunderstorms Likely | 8 mph WSW | 71% |
| Tonight | 48°F | Showers And Thunderstorms | 7 to 10 mph ESE | 76% |
| Wednesday | 53°F | Rain Showers Likely | 12 to 17 mph WSW | 68% |
| Wednesday Night | 43°F | Rain Showers Likely | 12 to 15 mph W | 66% |
| Thursday | 50°F | Rain Showers Likely | 14 mph NW | 72% |
| Thursday Night | 37°F | Mostly Cloudy | 9 to 13 mph N | 10% |
| Friday | 48°F | Partly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 30°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 | 7% |
| 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% |
Forecast source: National Weather Service (api.weather.gov) for Plainfield (42.845, -92.536). Updated through the day.
Growing snapshot for Plainfield
Last spring frost
Apr 29
First fall frost
Oct 9
Growing season
162 days
Hardiness zone
5a
More local growing data for Plainfield: nearby ZIP 50666 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Tripoli, Ia (12.8 mi from Plainfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.