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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.

Today
81°F
Patchy Fog then Chance Showers And Thunderstorms
Patchy fog and occasional showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and 1pm, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 81. South wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast for Bertram

WhenTempForecastWindPrecip
Today 81°F Patchy Fog then Chance Showers And Thunderstorms 5 to 10 mph S 98%
Tonight 63°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 5 to 10 mph NW 72%
Sunday 68°F Rain Showers Likely 10 to 15 mph NE 56%
Sunday Night 56°F Chance Rain Showers 10 to 15 mph NE 50%
Monday 64°F Chance Rain Showers 10 to 15 mph NE 53%
Monday Night 51°F Chance Rain Showers 10 mph NE 44%
Tuesday 63°F Chance Rain Showers then Partly Sunny 10 mph NE 31%
Tuesday Night 47°F Mostly Clear 5 to 10 mph NE 5%
Wednesday 67°F Sunny 5 mph NE 1%
Wednesday Night 51°F Partly Cloudy 0 to 5 mph NE 1%
Thursday 68°F Mostly Sunny 0 to 5 mph NE 7%
Thursday Night 54°F Partly Cloudy 0 to 5 mph E 4%
Friday 70°F Mostly Sunny 0 to 5 mph E 5%
Friday Night 54°F Partly Cloudy 0 to 5 mph E 6%

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.