Armstrong, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Armstrong, a city in Emmet County, Iowa.
Today
73°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 73, with temperatures falling to around 70 in the afternoon. North northwest wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Armstrong
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Chance Showers And Thunderstorms | 7 to 14 mph NNW | 38% |
| Tonight | 55°F | Chance Showers And Thunderstorms then Mostly Cloudy | 2 to 7 mph WNW | 31% |
| Wednesday | 75°F | Mostly Sunny | 3 mph NNE | 1% |
| Wednesday Night | 53°F | Mostly Clear | 6 mph SSE | 1% |
| Thursday | 81°F | Sunny | 6 to 12 mph SSW | 1% |
| Thursday Night | 61°F | Mostly Clear | 12 mph S | 3% |
| Friday | 84°F | Sunny | 9 to 15 mph SSW | 13% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 8 to 14 mph S | 20% |
| Saturday | 86°F | Sunny then Slight Chance Showers And Thunderstorms | 7 to 17 mph S | 15% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 13 to 17 mph ESE | 26% |
| Sunday | 85°F | Chance Showers And Thunderstorms then Mostly Sunny | 13 mph SE | 26% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms | 9 to 13 mph E | 31% |
| Monday | 84°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 15 mph E | 31% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 10 to 16 mph NE | 31% |
Forecast source: National Weather Service (api.weather.gov) for Armstrong (43.394, -94.483). Updated through the day.
Growing snapshot for Armstrong
Last spring frost
May 4
First fall frost
Oct 1
Growing season
150 days
Hardiness zone
5a
More local growing data for Armstrong: nearby ZIP 50514 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Swea City 5N, Ia (8.7 mi from Armstrong). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.