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.
This Afternoon
72°F
Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 72, with temperatures falling to around 68 in the afternoon. South wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
7-day forecast for Black Jack
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Rain | 20 mph S | 95% |
| Tonight | 55°F | Rain | 10 to 17 mph S | 91% |
| Wednesday | 63°F | Chance Rain Showers then Mostly Cloudy | 8 to 14 mph W | 11% |
| Wednesday Night | 47°F | Partly Cloudy | 7 mph SW | 0% |
| Thursday | 65°F | Sunny | 7 to 10 mph W | 2% |
| Thursday Night | 46°F | Mostly Cloudy | 7 mph NW | 9% |
| Friday | 58°F | Mostly Cloudy | 7 to 10 mph NW | 5% |
| Friday Night | 41°F | Mostly Cloudy | 2 to 7 mph N | 1% |
| Saturday | 56°F | Mostly Sunny | 5 mph NW | 0% |
| Saturday Night | 39°F | Partly Cloudy | 2 mph W | 0% |
| Sunday | 62°F | Sunny | 2 to 7 mph W | 8% |
| Sunday Night | 40°F | Mostly Clear | 5 mph W | 4% |
| Monday | 66°F | Sunny | 3 to 7 mph SW | 2% |
| Monday Night | 44°F | Mostly Clear | 5 mph SW | 1% |
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 Nov 3, 2026.