Fairfax, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairfax, a city in Linn County, Iowa.
Tonight
62°F
Showers And Thunderstorms
Showers and thunderstorms likely before 10pm, then showers and thunderstorms likely between 10pm and midnight, then showers and thunderstorms. Mostly cloudy. Low around 62, with temperatures rising to around 65 overnight. North wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Fairfax
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Showers And Thunderstorms | 5 to 10 mph N | 78% |
| Sunday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 54% |
| Sunday Night | 56°F | Chance Rain Showers | 10 to 15 mph NE | 53% |
| Monday | 61°F | Rain Showers Likely | 10 to 15 mph NE | 71% |
| Monday Night | 51°F | Rain Showers Likely | 10 mph NE | 71% |
| Tuesday | 61°F | Chance Rain Showers | 10 mph NE | 40% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 64°F | Mostly Sunny | 5 mph NE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 66°F | Partly Sunny | 5 mph E | 11% |
| Thursday Night | 56°F | Slight Chance Rain Showers | 0 to 5 mph E | 22% |
| Friday | 69°F | Slight Chance Rain Showers then Partly Sunny | 0 to 5 mph E | 17% |
| Friday Night | 57°F | Partly Cloudy | 5 mph E | 13% |
| Saturday | 69°F | Partly Sunny then Slight Chance Rain Showers | 5 mph E | 15% |
Forecast source: National Weather Service (api.weather.gov) for Fairfax (41.925, -91.778). Updated through the day.
Growing snapshot for Fairfax
Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
165 days
Hardiness zone
5a
More local growing data for Fairfax: nearby ZIP 52228 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Alburnett
Bertram
Cedar Rapids
Center Point
Central City
Coggon
Ely
Hiawatha
Marion
Mount Vernon
Palo
Prairieburg
Robins
Springville
Walker
Climate data from the nearest NOAA station, Cedar Rapids Muni Ap, Ia (3.9 mi from Fairfax). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.