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Will it freeze in St. Robert in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 32°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
Tonight: forecast low 41°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
3 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 41°F Above 36°F · Slight Chance Rain Showers then Slight Chance Drizzle
- Fri, Nov 6 32°F Freeze · Mostly Clear then Areas Of Frost
- Sat, Nov 7 32°F Freeze · Mostly Clear then Widespread Frost
- Sun, Nov 8 36°F Frost possible · Clear then Patchy Frost
- Mon, Nov 9 40°F Above 36°F · Clear
- Tue, Nov 10 42°F Above 36°F · Mostly Clear
- Wed, Nov 11 44°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 St. Robert
The median first fall hard-freeze date (28°F) is October 31, from NOAA’s 1991–2020 Climate Normals at Waynesville 2 W. 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 | Apr 12 · Apr 28 · May 12 | Sep 27 · Oct 10 · Oct 23 | 163 days |
| 32°F freeze | Mar 29 · Apr 15 · May 2 | Oct 6 · Oct 21 · Nov 1 | 185 days |
| 28°F hard freeze | Mar 16 · Apr 1 · Apr 20 | Oct 16 · Oct 31 · Nov 14 | 209 days |
Average high temperature by month
1991–2020 normals at Waynesville 2 W
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 St. Robert, MO come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Waynesville 2 W (station USC00238777, elevation 890 ft), 4.4 mi from St. Robert. 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 St. Robert
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Waynesville, MO | 3.7 mi | Apr 15 | Oct 21 |
| Rolla, MO | 23 mi | Apr 5 | Nov 1 |
| Lebanon, MO | 30 mi | Apr 17 | Oct 21 |
| Osage Beach, MO | 34 mi | Mar 31 | Nov 3 |
| Jefferson City, MO | 52 mi | Apr 8 | Oct 31 |
| Marshfield, MO | 53 mi | Apr 13 | Oct 24 |
| Sullivan, MO | 60 mi | Apr 11 | Oct 23 |
| Ashland, MO | 68 mi | Apr 7 | Oct 29 |
| Rogersville, MO | 70 mi | Apr 26 | Oct 13 |
| Bolivar, MO | 71 mi | Apr 14 | Oct 23 |
Frequently asked questions
When is the last frost in St. Robert?
On average, the last spring frost (32°F) in St. Robert is around April 15. In about 1 year in 10 it comes after May 2, and in 9 years in 10 it comes after March 29.
When is the first frost in St. Robert?
The first fall frost (32°F) usually arrives around October 21. There’s a 10% chance of a freeze by October 6 and a 90% chance by November 1.
Can it frost in St. Robert 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 28.
What growing zone is St. Robert?
St. Robert is in USDA Plant Hardiness Zone 6b (average annual extreme minimum temperature −5 to 0°F), based on the 2023 USDA map for ZIP code 65584. See growing zones in Missouri.
More: all Missouri frost dates · Missouri growing zones · frost vs. freeze