Irena, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Irena, a village in Worth County, Missouri.
Today
86°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 86. South southeast wind around 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Irena
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 mph SSE | 16% |
| Tonight | 65°F | Showers And Thunderstorms Likely | 6 to 9 mph NE | 63% |
| Wednesday | 75°F | Showers And Thunderstorms Likely | 9 mph NE | 63% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms | 3 to 9 mph NE | 47% |
| Thursday | 81°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph ENE | 32% |
| Thursday Night | 63°F | Mostly Clear | 3 mph ESE | 12% |
| Friday | 85°F | Mostly Sunny | 3 to 7 mph S | 12% |
| Friday Night | 68°F | Mostly Clear | 6 mph S | 9% |
| Saturday | 89°F | Sunny | 3 to 10 mph S | 3% |
| Saturday Night | 72°F | Mostly Clear | 12 mph S | 7% |
| Sunday | 91°F | Sunny | 9 to 14 mph SSW | 6% |
| Sunday Night | 73°F | Partly Cloudy | 13 mph S | 9% |
| Monday | 92°F | Mostly Sunny | 10 to 16 mph SSW | 9% |
| Monday Night | 73°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 15% |
Forecast source: National Weather Service (api.weather.gov) for Irena (40.540, -94.390). Updated through the day.
Growing snapshot for Irena
Last spring frost
Apr 24
First fall frost
Oct 14
Growing season
172 days
Hardiness zone
5b
More local growing data for Irena: nearby ZIP 64456 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Grant City, Mo (1.3 mi from Irena). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.