Fairfax, IA Weather & Growing Conditions
Tonight
50°F
Mostly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 5am. Mostly cloudy. Low around 50, with temperatures rising to around 52 overnight. Southwest wind around 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 10 mph SW | 21% |
| Wednesday | 54°F | Chance Rain Showers | 10 to 15 mph W | 28% |
| Wednesday Night | 44°F | Slight Chance Rain Showers | 10 to 15 mph W | 19% |
| Thursday | 54°F | Chance Rain Showers | 10 mph NW | 32% |
| Thursday Night | 39°F | Mostly Cloudy | 5 to 10 mph N | 12% |
| Friday | 49°F | Mostly Sunny | 5 to 10 mph N | 3% |
| Friday Night | 30°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 1% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 mph W | 3% |
| Sunday Night | 36°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 62°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 62°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.