Armstrong, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Armstrong, a city in Emmet County, Iowa.
Tonight
41°F
Rain Showers
Rain showers. Cloudy. Low around 41, with temperatures rising to around 45 overnight. North northwest wind around 16 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Armstrong
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 41°F | Rain Showers | 16 mph NNW | 93% |
| Wednesday | 47°F | Rain Showers | 18 mph WNW | 88% |
| Wednesday Night | 38°F | Rain Showers | 15 mph NW | 90% |
| Thursday | 47°F | Chance Rain Showers | 14 to 17 mph NNW | 53% |
| Thursday Night | 33°F | Mostly Cloudy | 6 to 13 mph N | 4% |
| Friday | 46°F | Partly Sunny | 6 mph NNE | 0% |
| Friday Night | 29°F | Partly Cloudy | 3 mph SSE | 0% |
| Saturday | 54°F | Mostly Sunny | 3 to 8 mph SW | 2% |
| Saturday Night | 34°F | Mostly Clear | 8 mph W | 3% |
| Sunday | 58°F | Sunny | 8 mph W | 6% |
| Sunday Night | 36°F | Mostly Clear | 9 mph SSW | 1% |
| Monday | 61°F | Sunny | 9 to 13 mph WSW | 0% |
| Monday Night | 37°F | Mostly Clear | 8 mph WNW | 0% |
| Tuesday | 57°F | Mostly Sunny | 7 mph WNW | 1% |
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 Nov 4, 2026.