Martinsburg, IA Weather & Growing Conditions
Today
87°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 4pm. Mostly sunny. High near 87, with temperatures falling to around 85 in the afternoon. Northwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph NW | 31% |
| Tonight | 65°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 74% |
| Wednesday | 78°F | Showers And Thunderstorms | 5 to 10 mph NE | 78% |
| Wednesday Night | 60°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 60% |
| Thursday | 81°F | Chance Rain Showers then Mostly Sunny | 5 mph NE | 39% |
| Thursday Night | 61°F | Mostly Clear | 0 to 5 mph E | 3% |
| Friday | 85°F | Sunny | 0 to 5 mph SE | 6% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 mph SE | 15% |
| Saturday | 89°F | Sunny | 5 to 10 mph S | 14% |
| Saturday Night | 70°F | Mostly Clear | 10 to 15 mph S | 10% |
| Sunday | 90°F | Mostly Sunny | 10 to 15 mph S | 10% |
| Sunday Night | 70°F | Partly Cloudy then Chance Showers And Thunderstorms | 10 mph S | 26% |
| Monday | 90°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SW | 26% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 29% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Martinsburg, IA
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
172 days
Hardiness zone
5b
Explore more for Martinsburg, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Sigourney, Ia (11.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.