Fairfield, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairfield, a city in Jefferson County, Iowa.
This Afternoon
70°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 70, with temperatures falling to around 66 in the afternoon. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
7-day forecast for Fairfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Showers And Thunderstorms | 15 mph S | 75% |
| Tonight | 49°F | Chance Rain Showers | 10 to 15 mph SW | 28% |
| Wednesday | 54°F | Slight Chance Rain Showers | 15 mph SW | 16% |
| Wednesday Night | 44°F | Mostly Cloudy | 10 to 15 mph W | 6% |
| Thursday | 53°F | Mostly Cloudy then Chance Rain Showers | 10 mph W | 26% |
| Thursday Night | 41°F | Chance Rain Showers then Mostly Cloudy | 5 mph NW | 31% |
| Friday | 52°F | Partly Sunny | 5 to 10 mph N | 11% |
| Friday Night | 34°F | Mostly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 54°F | Partly Sunny | 0 to 5 mph W | 1% |
| Saturday Night | 36°F | Mostly Clear | 0 to 5 mph W | 3% |
| Sunday | 59°F | Sunny | 5 mph W | 7% |
| Sunday Night | 37°F | Mostly Clear | 5 mph W | 2% |
| Monday | 64°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Fairfield (41.006, -91.967). Updated through the day.
Growing snapshot for Fairfield
Last spring frost
Apr 27
First fall frost
Oct 12
Growing season
168 days
Hardiness zone
5b
More local growing data for Fairfield: nearby ZIP 52557 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Fairfield, Ia (0.6 mi from Fairfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.