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Will it freeze in Oswego in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Wed, Nov 11: 30°F (Wed, Nov 11, 6:00 PM EST to Thu, Nov 12, 6:00 AM EST).
Tonight: forecast low 49°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
2 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 49°F Above 36°F · Mostly Cloudy
- Fri, Nov 6 42°F Above 36°F · Rain Showers
- Sat, Nov 7 38°F Above 36°F · Rain Showers
- Sun, Nov 8 38°F Above 36°F · Chance Rain Showers
- Mon, Nov 9 38°F Above 36°F · Slight Chance Rain Showers
- Tue, Nov 10 36°F Frost possible · Chance Rain Showers
- Wed, Nov 11 30°F Freeze · Slight Chance Rain Showers then Slight Chance Rain And Snow Showers
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 Oswego
The median first fall hard-freeze date (28°F) is November 10, from NOAA’s 1991–2020 Climate Normals at Oswego. 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 23 · May 4 · May 19 | Sep 29 · Oct 13 · Oct 30 | 161 days |
| 32°F freeze | Apr 9 · Apr 22 · May 7 | Oct 9 · Oct 29 · Nov 11 | 187 days |
| 28°F hard freeze | Mar 31 · Apr 10 · Apr 22 | Oct 29 · Nov 10 · Nov 26 | 214 days |
Average high temperature by month
1991–2020 normals at Oswego
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 Oswego, NY come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Oswego (station USC00306314, elevation 324 ft), 1.7 mi from Oswego. 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 Oswego
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Fulton, NY | 11 mi | Apr 27 | Oct 24 |
| Baldwinsville, NY | 22 mi | May 4 | Oct 11 |
| North Syracuse, NY | 29 mi | Apr 29 | Oct 19 |
| Solvay, NY | 31 mi | Apr 29 | Oct 19 |
| Syracuse, NY | 34 mi | Apr 29 | Oct 19 |
| Auburn, NY | 37 mi | May 2 | Oct 18 |
| Newark, NY | 42 mi | Apr 30 | Oct 21 |
| Watertown, NY | 47 mi | May 2 | Oct 13 |
| Geneva, NY | 48 mi | Apr 30 | Oct 21 |
| Webster, NY | 49 mi | May 1 | Oct 20 |
Frequently asked questions
When is the last frost in Oswego?
On average, the last spring frost (32°F) in Oswego is around April 22. In about 1 year in 10 it comes after May 7, and in 9 years in 10 it comes after April 9.
When is the first frost in Oswego?
The first fall frost (32°F) usually arrives around October 29. There’s a 10% chance of a freeze by October 9 and a 90% chance by November 11.
Can it frost in Oswego 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 Oswego?
Oswego 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 13126. See growing zones in New York.
More: all New York frost dates · New York growing zones · frost vs. freeze