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Will it freeze in Gresham in the next 7 nights?
No overnight lows at or below 32°F are forecast in Gresham during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 43°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 43°F Above 36°F · Partly Cloudy
- Fri, Nov 6 49°F Above 36°F · Light Rain Likely
- Sat, Nov 7 50°F Above 36°F · Light Rain
- Sun, Nov 8 43°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 48°F Above 36°F · Light Rain Likely
- Tue, Nov 10 50°F Above 36°F · Chance Light Rain
- Wed, Nov 11 47°F Above 36°F · Chance Light Rain
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 Gresham
The median first fall hard-freeze date (28°F) is December 15, from NOAA’s 1991–2020 Climate Normals at Portland Troutdale 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 | Mar 27 · Apr 19 · May 4 | Oct 11 · Oct 30 · Nov 22 | 198 days |
| 32°F freeze | Feb 18 · Mar 16 · Apr 12 | Oct 30 · Nov 20 · Dec 17 | 250 days |
| 28°F hard freeze | Dec 27 · Feb 14 · Mar 10 | Nov 15 · Dec 15 · Feb 3 | 311 days |
Average high temperature by month
1991–2020 normals at Portland Troutdale 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 Gresham, OR come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Portland Troutdale Airport (station USW00024242, elevation 29 ft), 3.7 mi from Gresham. 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 Gresham
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Fairview, OR | 3.1 mi | Mar 16 | Nov 20 |
| Troutdale, OR | 3.7 mi | Mar 26 | Nov 17 |
| Happy Valley, OR | 5.6 mi | Mar 18 | Nov 18 |
| Camas, WA | 6.8 mi | Mar 16 | Nov 20 |
| Washougal, WA | 7.5 mi | Mar 26 | Nov 17 |
| Milwaukie, OR | 9.3 mi | Feb 25 | Dec 1 |
| Portland, OR | 11 mi | Feb 25 | Dec 1 |
| Gladstone, OR | 11 mi | Mar 18 | Nov 18 |
| Sandy, OR | 11 mi | Mar 27 | Nov 18 |
| Vancouver, WA | 12 mi | Mar 29 | Nov 9 |
Frequently asked questions
When is the last frost in Gresham?
On average, the last spring frost (32°F) in Gresham is around March 16. In about 1 year in 10 it comes after April 12, and in 9 years in 10 it comes after February 18.
When is the first frost in Gresham?
The first fall frost (32°F) usually arrives around November 20. There’s a 10% chance of a freeze by October 30 and a 90% chance by December 17.
Can it frost in Gresham 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 19.
What growing zone is Gresham?
Gresham is in USDA Plant Hardiness Zone 9a (average annual extreme minimum temperature 20 to 25°F), based on the 2023 USDA map for ZIP code 97030. See growing zones in Oregon.
More: all Oregon frost dates · Oregon growing zones · UV index today in Gresham · frost vs. freeze