Black Jack, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Black Jack, a city in St. Louis County, Missouri.
Today
88°F
Sunny
Sunny, with a high near 88. Southeast wind around 5 mph.
7-day forecast for Black Jack
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 5 mph SE | 0% |
| Tonight | 70°F | Mostly Clear | 6 mph SE | 0% |
| Wednesday | 90°F | Sunny | 3 to 7 mph S | 12% |
| Wednesday Night | 73°F | Chance Showers And Thunderstorms | 7 mph S | 71% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 6 mph S | 71% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 5 mph SE | 29% |
| Friday | 87°F | Chance Showers And Thunderstorms | 5 mph SW | 29% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 5 mph S | 30% |
| Saturday | 89°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph S | 30% |
| Saturday Night | 74°F | Mostly Clear | 7 mph S | 6% |
| Sunday | 92°F | Sunny | 6 to 9 mph S | 6% |
| Sunday Night | 75°F | Mostly Clear | 8 mph S | 5% |
| Monday | 93°F | Mostly Sunny | 8 mph SW | 5% |
| Monday Night | 77°F | Slight Chance Showers And Thunderstorms | 8 mph SW | 17% |
Forecast source: National Weather Service (api.weather.gov) for Black Jack (38.799, -90.263). Updated through the day.
Growing snapshot for Black Jack
Last spring frost
Apr 2
First fall frost
Nov 4
Growing season
215 days
Hardiness zone
7a
More local growing data for Black Jack: nearby ZIP 63033 weather · frost dates · planting calendar · Missouri frost dates
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Climate data from the nearest NOAA station, St Louis Lambert Intl Ap, Mo (6.2 mi from Black Jack). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.