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Will it freeze in Bloomington 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 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 · Chance Light Rain then Cloudy
- Fri, Nov 6 31°F Freeze · Mostly Clear
- Sat, Nov 7 33°F Frost possible · Mostly Clear
- Sun, Nov 8 36°F Frost possible · Mostly Clear
- Mon, Nov 9 41°F Above 36°F · Clear
- Tue, Nov 10 40°F Above 36°F · Mostly Clear
- Wed, Nov 11 40°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 Bloomington
The median first fall hard-freeze date (28°F) is October 27, from NOAA’s 1991–2020 Climate Normals at Normal 4NE. 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 21 · May 4 · May 22 | Sep 23 · Oct 5 · Oct 18 | 153 days |
| 32°F freeze | Apr 11 · Apr 25 · May 11 | Oct 2 · Oct 16 · Oct 29 | 172 days |
| 28°F hard freeze | Apr 1 · Apr 14 · May 1 | Oct 12 · Oct 27 · Nov 12 | 195 days |
Average high temperature by month
1991–2020 normals at Normal 4NE
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 Bloomington, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Normal 4NE (station USC00116200, elevation 790 ft), 5.2 mi from Bloomington. 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 Bloomington
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Normal, IL | 3.1 mi | Apr 25 | Oct 16 |
| Clinton, IL | 23 mi | Apr 20 | Oct 16 |
| Eureka, IL | 23 mi | Apr 21 | Oct 17 |
| Morton, IL | 28 mi | Apr 21 | Oct 17 |
| Washington, IL | 29 mi | Apr 21 | Oct 17 |
| Lincoln, IL | 31 mi | Apr 20 | Oct 16 |
| East Peoria, IL | 33 mi | Apr 16 | Oct 23 |
| Pontiac, IL | 34 mi | Apr 16 | Oct 24 |
| Pekin, IL | 35 mi | Apr 16 | Oct 23 |
| Mahomet, IL | 37 mi | Apr 23 | Oct 13 |
Frequently asked questions
When is the last frost in Bloomington?
On average, the last spring frost (32°F) in Bloomington is around April 25. In about 1 year in 10 it comes after May 11, and in 9 years in 10 it comes after April 11.
When is the first frost in Bloomington?
The first fall frost (32°F) usually arrives around October 16. There’s a 10% chance of a freeze by October 2 and a 90% chance by October 29.
Can it frost in Bloomington 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 May 4.
What growing zone is Bloomington?
Bloomington is in USDA Plant Hardiness Zone 6a (average annual extreme minimum temperature −10 to −5°F), based on the 2023 USDA map for ZIP code 61701. See growing zones in Illinois.
More: all Illinois frost dates · Illinois growing zones · UV index today in Bloomington · frost vs. freeze