Martinsburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Martinsburg, a city in Keokuk County, Iowa.
Today
52°F
Cloudy
Cloudy, with a high near 52. West wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Martinsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Cloudy | 15 mph W | 13% |
| Tonight | 44°F | Mostly Cloudy | 10 to 15 mph W | 7% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 53% |
| Thursday Night | 41°F | Mostly Cloudy | 10 mph N | 14% |
| Friday | 50°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 30°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 58°F | Sunny | 5 mph W | 1% |
| Sunday Night | 36°F | Clear | 5 mph SW | 0% |
| Monday | 65°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 64°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 42°F | Partly Cloudy | 0 to 5 mph NE | 1% |
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
Nearby towns & communities
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What Cheer
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 Nov 4, 2026.