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Will it freeze in Murphysboro in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 31°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
Tonight: forecast low 42°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 42°F Above 36°F · Partly Cloudy
- Fri, Nov 6 31°F Freeze · Mostly Clear
- Sat, Nov 7 31°F Freeze · Mostly Clear
- Sun, Nov 8 33°F Frost possible · Clear
- Mon, Nov 9 37°F Above 36°F · Clear
- Tue, Nov 10 39°F Above 36°F · Mostly Clear
- Wed, Nov 11 41°F Above 36°F · Partly Cloudy
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 Murphysboro
The median first fall hard-freeze date (28°F) is November 1, from NOAA’s 1991–2020 Climate Normals at Carbondale Southern Il 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 | Apr 6 · Apr 21 · May 6 | Sep 30 · Oct 12 · Oct 23 | 173 days |
| 32°F freeze | Mar 24 · Apr 9 · Apr 25 | Oct 8 · Oct 22 · Nov 1 | 195 days |
| 28°F hard freeze | Mar 11 · Mar 30 · Apr 14 | Oct 21 · Nov 1 · Nov 17 | 217 days |
Average high temperature by month
1991–2020 normals at Carbondale Southern Il 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 Murphysboro, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Carbondale Southern Il Airport (station USW00093810, elevation 406 ft), 4.6 mi from Murphysboro. 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 Murphysboro
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Carbondale, IL | 6.8 mi | Apr 9 | Oct 22 |
| Carterville, IL | 14 mi | Apr 9 | Oct 22 |
| Herrin, IL | 17 mi | Apr 9 | Oct 22 |
| Du Quoin, IL | 17 mi | Apr 6 | Oct 22 |
| Marion, IL | 22 mi | Apr 9 | Oct 22 |
| West Frankfort, IL | 24 mi | Apr 4 | Oct 28 |
| Benton, IL | 29 mi | Apr 4 | Oct 28 |
| Chester, IL | 29 mi | Apr 8 | Oct 30 |
| Perryville, MO | 30 mi | Apr 19 | Oct 20 |
| Jackson, MO | 32 mi | Apr 7 | Oct 29 |
Frequently asked questions
When is the last frost in Murphysboro?
On average, the last spring frost (32°F) in Murphysboro is around April 9. In about 1 year in 10 it comes after April 25, and in 9 years in 10 it comes after March 24.
When is the first frost in Murphysboro?
The first fall frost (32°F) usually arrives around October 22. There’s a 10% chance of a freeze by October 8 and a 90% chance by November 1.
Can it frost in Murphysboro 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 21.
What growing zone is Murphysboro?
Murphysboro 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 62966. See growing zones in Illinois.
More: all Illinois frost dates · Illinois growing zones · frost vs. freeze