Checking current alerts… View NWS forecast and alerts.
Will it freeze in Weiser in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 29°F (Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST).
Tonight: forecast low 29°F. Freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
6 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 29°F Freeze · Clear
- Fri, Nov 6 30°F Freeze · Partly Cloudy
- Sat, Nov 7 35°F Frost possible · Partly Cloudy
- Sun, Nov 8 34°F Frost possible · Mostly Cloudy
- Mon, Nov 9 34°F Frost possible · Partly Cloudy
- Tue, Nov 10 36°F Frost possible · Partly Cloudy
- Wed, Nov 11 38°F Above 36°F · Mostly 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 Weiser
The median first fall hard-freeze date (28°F) is October 25, from NOAA’s 1991–2020 Climate Normals at Weiser. 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 22 · May 6 · May 26 | Sep 20 · Oct 4 · Oct 16 | 148 days |
| 32°F freeze | Apr 3 · Apr 23 · May 10 | Oct 1 · Oct 13 · Oct 27 | 174 days |
| 28°F hard freeze | Mar 13 · Apr 3 · Apr 27 | Oct 12 · Oct 25 · Nov 7 | 204 days |
Average high temperature by month
1991–2020 normals at Weiser
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 Weiser, ID come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Weiser (station USC00109638, elevation 2,120 ft), 0.6 mi from Weiser. 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 Weiser
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Payette, ID | 12 mi | Apr 19 | Oct 20 |
| Ontario, OR | 16 mi | Apr 22 | Oct 9 |
| Fruitland, ID | 17 mi | Apr 22 | Oct 9 |
| Emmett, ID | 35 mi | Apr 30 | Oct 17 |
| Middleton, ID | 42 mi | Apr 29 | Oct 13 |
| Caldwell, ID | 45 mi | Apr 29 | Oct 13 |
| Star, ID | 45 mi | Apr 29 | Oct 13 |
| Eagle, ID | 47 mi | Apr 29 | Oct 13 |
| Nampa, ID | 50 mi | Apr 29 | Oct 13 |
| Garden City, ID | 53 mi | May 17 | Oct 12 |
Frequently asked questions
When is the last frost in Weiser?
On average, the last spring frost (32°F) in Weiser is around April 23. In about 1 year in 10 it comes after May 10, and in 9 years in 10 it comes after April 3.
When is the first frost in Weiser?
The first fall frost (32°F) usually arrives around October 13. There’s a 10% chance of a freeze by October 1 and a 90% chance by October 27.
Can it frost in Weiser 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 6.
What growing zone is Weiser?
Weiser 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 83672. See growing zones in Idaho.
More: all Idaho frost dates · Idaho growing zones · frost vs. freeze