Martinsburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Martinsburg, a city in Keokuk County, Iowa.
Today
83°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a high near 83. South wind 5 to 10 mph. Chance of precipitation is 60%.
7-day forecast for Martinsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Showers And Thunderstorms Likely | 5 to 10 mph S | 61% |
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph NW | 81% |
| Sunday | 70°F | Showers And Thunderstorms | 10 to 15 mph NE | 75% |
| Sunday Night | 58°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 10 to 15 mph NE | 63% |
| Monday | 63°F | Rain Showers Likely | 15 mph NE | 63% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 52% |
| Tuesday | 61°F | Chance Rain Showers then Partly Sunny | 10 mph NE | 39% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 3% |
| Wednesday | 65°F | Sunny | 5 mph NE | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 5 mph NE | 3% |
| Thursday | 67°F | Partly Sunny | 5 mph E | 7% |
| Thursday Night | 55°F | Mostly Cloudy | 5 mph E | 6% |
| Friday | 70°F | Partly Sunny | 5 mph E | 5% |
| Friday Night | 56°F | Partly Cloudy | 5 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov) for Martinsburg (41.179, -92.252). Updated through the day.
Growing snapshot for Martinsburg
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
172 days
Hardiness zone
5b
More local growing data for Martinsburg: nearby ZIP 52568 weather · frost dates · planting calendar · Iowa frost dates
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Climate data from the nearest NOAA station, Sigourney, Ia (11.1 mi from Martinsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.