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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

WhenTempForecastWindPrecip
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

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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.