Plainfield, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plainfield, a city in Bremer County, Iowa.
Overnight
63°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 1am, then patchy fog and showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. Low around 63, with temperatures rising to around 66 overnight. Southeast wind 9 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Plainfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Showers And Thunderstorms Likely | 9 to 13 mph SE | 79% |
| Saturday | 76°F | Patchy Fog | 7 to 10 mph SW | 57% |
| Saturday Night | 57°F | Chance Showers And Thunderstorms | 13 mph N | 33% |
| Sunday | 66°F | Chance Rain Showers | 14 to 17 mph NE | 29% |
| Sunday Night | 52°F | Slight Chance Rain Showers | 15 mph ENE | 20% |
| Monday | 61°F | Chance Rain Showers | 16 mph ENE | 50% |
| Monday Night | 47°F | Chance Rain Showers | 9 to 14 mph ENE | 50% |
| Tuesday | 60°F | Slight Chance Rain Showers then Partly Sunny | 10 mph ENE | 24% |
| Tuesday Night | 44°F | Partly Cloudy | 3 to 8 mph ENE | 3% |
| Wednesday | 65°F | Sunny | 6 mph E | 0% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph ESE | 5% |
| Thursday | 67°F | Partly Sunny | 5 mph SE | 12% |
| Thursday Night | 51°F | Partly Cloudy | 3 mph SE | 10% |
| Friday | 67°F | Mostly Sunny | 2 to 6 mph E | 6% |
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 Sep 19, 2026.