Glen Allen, MO Weather & Growing Conditions
Today
86°F
Patchy Fog then Sunny
Patchy fog before 8am. Sunny, with a high near 86. East northeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Patchy Fog then Sunny | 2 mph ENE | 1% |
| Tonight | 65°F | Mostly Clear | 2 mph E | 0% |
| Wednesday | 88°F | Sunny | 0 to 3 mph S | 0% |
| Wednesday Night | 68°F | Partly Cloudy | 3 mph S | 7% |
| Thursday | 87°F | Chance Showers And Thunderstorms | 2 to 6 mph SSW | 34% |
| Thursday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 mph S | 55% |
| Friday | 86°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph SSW | 55% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 2 mph SW | 39% |
| Saturday | 87°F | Chance Showers And Thunderstorms | 3 mph SSW | 34% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SSW | 18% |
| Sunday | 88°F | Sunny | 2 to 7 mph SSW | 5% |
| Sunday Night | 71°F | Mostly Clear | 6 mph SSW | 3% |
| Monday | 90°F | Sunny | 3 to 7 mph SSW | 4% |
| Monday Night | 72°F | Mostly Clear | 6 mph SSW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Glen Allen, MO
Last spring frost
Apr 12
First fall frost
Oct 23
Growing season
193 days
Hardiness zone
6b
Explore more for Glen Allen, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Marble Hill, Mo (9.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.