Bertram, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bertram, a city in Linn County, Iowa.
Tonight
50°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 5am. Mostly cloudy. Low around 50, with temperatures rising to around 52 overnight. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
7-day forecast for Bertram
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Chance Showers And Thunderstorms | 10 mph S | 31% |
| Wednesday | 54°F | Chance Rain Showers | 15 mph SW | 39% |
| Wednesday Night | 44°F | Chance Rain Showers | 10 to 15 mph SW | 26% |
| Thursday | 53°F | Rain Showers Likely | 10 mph W | 61% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph N | 20% |
| Friday | 51°F | Partly Sunny | 5 to 10 mph N | 4% |
| Friday Night | 33°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 4% |
| Sunday | 59°F | Sunny | 5 to 10 mph W | 8% |
| Sunday Night | 37°F | Mostly Clear | 0 to 5 mph SW | 2% |
| 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) 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 Nov 4, 2026.