Fairfield, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairfield, a city in Jefferson County, Iowa.
Overnight
69°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 4am, then patchy fog and a chance of showers and thunderstorms between 4am and 5am, then patchy fog and a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind around 5 mph. Chance of precipitation is 30%.
7-day forecast for Fairfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Slight Chance Showers And Thunderstorms | 5 mph S | 25% |
| Saturday | 84°F | Patchy Fog | 5 to 10 mph S | 36% |
| Saturday Night | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph NW | 75% |
| Sunday | 71°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 to 15 mph N | 79% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 66% |
| Monday | 63°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 66% |
| Monday Night | 52°F | Rain Showers Likely | 10 mph NE | 56% |
| Tuesday | 61°F | Chance Rain Showers | 10 mph NE | 42% |
| Tuesday Night | 47°F | Partly Cloudy | 5 mph NE | 4% |
| Wednesday | 65°F | Sunny | 5 mph NE | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 68°F | Partly Sunny | 0 to 5 mph NE | 7% |
| Thursday Night | 55°F | Mostly Cloudy | 0 mph | 5% |
| Friday | 71°F | Partly Sunny | 0 to 5 mph E | 6% |
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 Sep 19, 2026.