Bertram, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bertram, a city in Linn County, Iowa.
Tonight
67°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 2am, then showers and thunderstorms. Mostly cloudy, with a low around 67. 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 for Bertram
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 82% |
| Saturday | 82°F | Showers And Thunderstorms | 5 to 10 mph S | 76% |
| Saturday Night | 63°F | Showers And Thunderstorms | 5 mph N | 79% |
| Sunday | 69°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 68% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 67% |
| Monday | 64°F | Rain Showers Likely | 15 mph NE | 57% |
| Monday Night | 51°F | Rain Showers Likely | 10 to 15 mph NE | 57% |
| Tuesday | 62°F | Chance Rain Showers | 10 mph NE | 31% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 67°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 69°F | Mostly Sunny | 0 to 5 mph NE | 9% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 7% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Bertram (41.952, -91.538). Updated through the day.
Growing snapshot for Bertram
Last spring frost
Apr 28
First fall frost
Oct 12
Growing season
166 days
Hardiness zone
5b
More local growing data for Bertram: nearby ZIP 52403 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Alburnett
Cedar Rapids
Center Point
Central City
Coggon
Ely
Fairfax
Hiawatha
Marion
Mount Vernon
Palo
Prairieburg
Robins
Springville
Walker
Climate data from the nearest NOAA station, Cedar Rapids #1, Ia (5.9 mi from Bertram). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.