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Will it freeze in Black Jack in the next 7 nights?
No overnight lows at or below 32°F are forecast in Black Jack during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 47°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
2 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 47°F Above 36°F · Slight Chance Drizzle then Cloudy
- Fri, Nov 6 35°F Frost possible · Mostly Clear
- Sat, Nov 7 36°F Frost possible · Mostly Clear
- Sun, Nov 8 39°F Above 36°F · Clear
- Mon, Nov 9 44°F Above 36°F · Clear
- Tue, Nov 10 44°F Above 36°F · Mostly Clear
- Wed, Nov 11 45°F Above 36°F · Mostly Clear
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Black Jack
The median first fall hard-freeze date (28°F) is November 13, from NOAA’s 1991–2020 Climate Normals at St Louis Lambert Intl Airport. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Mar 31 · Apr 13 · Apr 28 | Oct 14 · Oct 26 · Nov 6 | 195 days |
| 32°F freeze | Mar 17 · Apr 2 · Apr 17 | Oct 23 · Nov 4 · Nov 18 | 215 days |
| 28°F hard freeze | Mar 5 · Mar 23 · Apr 7 | Nov 2 · Nov 13 · Nov 30 | 236 days |
Average high temperature by month
1991–2020 normals at St Louis Lambert Intl Airport
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Black Jack, MO come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: St Louis Lambert Intl Airport (station USW00013994, elevation 531 ft), 6.8 mi from Black Jack. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Black Jack
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Florissant, MO | 3.7 mi | Apr 2 | Nov 4 |
| Bellefontaine Neighbors, MO | 3.7 mi | Apr 2 | Nov 4 |
| Ferguson, MO | 3.7 mi | Apr 2 | Nov 4 |
| Jennings, MO | 5.0 mi | Apr 2 | Nov 4 |
| Berkeley, MO | 5.6 mi | Apr 2 | Nov 4 |
| Hazelwood, MO | 6.8 mi | Apr 2 | Nov 4 |
| St. John, MO | 7.5 mi | Apr 2 | Nov 4 |
| St. Ann, MO | 8.1 mi | Apr 2 | Nov 4 |
| Bridgeton, MO | 8.7 mi | Apr 2 | Nov 4 |
| Granite City, IL | 8.7 mi | Apr 4 | Nov 5 |
Frequently asked questions
When is the last frost in Black Jack?
On average, the last spring frost (32°F) in Black Jack is around April 2. In about 1 year in 10 it comes after April 17, and in 9 years in 10 it comes after March 17.
When is the first frost in Black Jack?
The first fall frost (32°F) usually arrives around November 4. There’s a 10% chance of a freeze by October 23 and a 90% chance by November 18.
Can it frost in Black Jack after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after April 13.
What growing zone is Black Jack?
Black Jack is in USDA Plant Hardiness Zone 7a (average annual extreme minimum temperature 0 to 5°F), based on the 2023 USDA map for ZIP code 63033. See growing zones in Missouri.
More: all Missouri frost dates · Missouri growing zones · frost vs. freeze