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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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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Alburnett
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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.