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Will it freeze in Meridian in the next 7 nights?
No overnight lows at or below 32°F are forecast in Meridian during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 33°F. Frost possible.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
2 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 33°F Frost possible · Mostly Clear
- Fri, Nov 6 34°F Frost possible · Partly Cloudy
- Sat, Nov 7 41°F Above 36°F · Mostly Clear
- Sun, Nov 8 38°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 39°F Above 36°F · Partly Cloudy
- Tue, Nov 10 41°F Above 36°F · Partly Cloudy
- Wed, Nov 11 43°F Above 36°F · Partly 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 Meridian
The median first fall hard-freeze date (28°F) is October 31, from NOAA’s 1991–2020 Climate Normals at Boise Air Terminal. 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 8 · May 29 | Sep 25 · Oct 8 · Oct 25 | 153 days |
| 32°F freeze | Apr 4 · Apr 24 · May 9 | Oct 5 · Oct 21 · Nov 5 | 179 days |
| 28°F hard freeze | Mar 10 · Apr 2 · Apr 25 | Oct 17 · Oct 31 · Nov 19 | 212 days |
Average high temperature by month
1991–2020 normals at Boise Air Terminal
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 Meridian, ID come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Boise Air Terminal (station USW00024131, elevation 2,814 ft), 8.6 mi from Meridian. 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 Meridian
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Kuna, ID | 6.2 mi | Apr 24 | Oct 21 |
| Eagle, ID | 6.2 mi | Apr 29 | Oct 13 |
| Garden City, ID | 6.8 mi | May 17 | Oct 12 |
| Star, ID | 8.1 mi | Apr 29 | Oct 13 |
| Nampa, ID | 8.1 mi | Apr 29 | Oct 13 |
| Boise, ID | 8.7 mi | Apr 24 | Oct 21 |
| Middleton, ID | 12 mi | Apr 29 | Oct 13 |
| Caldwell, ID | 13 mi | Apr 29 | Oct 13 |
| Emmett, ID | 19 mi | Apr 30 | Oct 17 |
| Fruitland, ID | 38 mi | Apr 22 | Oct 9 |
Frequently asked questions
When is the last frost in Meridian?
On average, the last spring frost (32°F) in Meridian is around April 24. In about 1 year in 10 it comes after May 9, and in 9 years in 10 it comes after April 4.
When is the first frost in Meridian?
The first fall frost (32°F) usually arrives around October 21. There’s a 10% chance of a freeze by October 5 and a 90% chance by November 5.
Can it frost in Meridian 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 8.
What growing zone is Meridian?
Meridian 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 83642. See growing zones in Idaho.
More: all Idaho frost dates · Idaho growing zones · UV index today in Meridian · frost vs. freeze