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Will it freeze in Streator in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 30°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
Tonight: forecast low 39°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 39°F Above 36°F · Areas Of Drizzle then Mostly Cloudy
- Fri, Nov 6 30°F Freeze · Mostly Clear
- Sat, Nov 7 33°F Frost possible · Mostly Clear
- Sun, Nov 8 35°F Frost possible · Mostly Clear
- Mon, Nov 9 40°F Above 36°F · Clear
- Tue, Nov 10 39°F Above 36°F · Partly Cloudy
- Wed, Nov 11 39°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 Streator
The median first fall hard-freeze date (28°F) is November 8, from NOAA’s 1991–2020 Climate Normals at Streator 3 SE. 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 9 · Apr 23 · May 8 | Oct 1 · Oct 18 · Oct 30 | 177 days |
| 32°F freeze | Mar 30 · Apr 12 · Apr 25 | Oct 16 · Oct 28 · Nov 11 | 199 days |
| 28°F hard freeze | Mar 16 · Apr 1 · Apr 15 | Oct 27 · Nov 8 · Nov 25 | 222 days |
Average high temperature by month
1991–2020 normals at Streator 3 SE
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 Streator, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Streator 3 SE (station USC00118353, elevation 610 ft), 2.5 mi from Streator. 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 Streator
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Ottawa, IL | 16 mi | Apr 27 | Oct 17 |
| Pontiac, IL | 19 mi | Apr 16 | Oct 24 |
| LaSalle, IL | 20 mi | Apr 24 | Oct 18 |
| Peru, IL | 23 mi | Apr 24 | Oct 18 |
| Spring Valley, IL | 23 mi | Apr 24 | Oct 18 |
| Morris, IL | 27 mi | Apr 20 | Oct 23 |
| Coal City, IL | 30 mi | Apr 16 | Oct 26 |
| Mendota, IL | 33 mi | Apr 27 | Oct 15 |
| Braidwood, IL | 33 mi | Apr 16 | Oct 26 |
| Channahon, IL | 36 mi | Apr 16 | Oct 26 |
Frequently asked questions
When is the last frost in Streator?
On average, the last spring frost (32°F) in Streator is around April 12. In about 1 year in 10 it comes after April 25, and in 9 years in 10 it comes after March 30.
When is the first frost in Streator?
The first fall frost (32°F) usually arrives around October 28. There’s a 10% chance of a freeze by October 16 and a 90% chance by November 11.
Can it frost in Streator 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 23.
What growing zone is Streator?
Streator is in USDA Plant Hardiness Zone 5b (average annual extreme minimum temperature −15 to −10°F), based on the 2023 USDA map for ZIP code 61364. See growing zones in Illinois.
More: all Illinois frost dates · Illinois growing zones · frost vs. freeze