Fairfax, IA Weather & Growing Conditions
Tonight
67°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 10pm and 2am, then showers and thunderstorms. Mostly cloudy. Low around 67, with temperatures rising to around 69 overnight. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 80% |
| Saturday | 81°F | Showers And Thunderstorms Likely | 5 to 10 mph S | 73% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph N | 80% |
| Sunday | 68°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 68% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 68% |
| Monday | 63°F | Rain Showers Likely | 15 mph NE | 58% |
| Monday Night | 51°F | Rain Showers Likely | 10 to 15 mph NE | 58% |
| Tuesday | 61°F | Chance Rain Showers | 10 mph NE | 29% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 66°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 68°F | Partly Sunny | 0 to 5 mph NE | 10% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 5 mph E | 8% |
| Friday | 69°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fairfax, IA
Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
165 days
Hardiness zone
5a
Explore more for Fairfax, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Cedar Rapids Muni Ap, Ia (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.