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Will it freeze in Belgrade in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 27°F (Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST).
Tonight: forecast low 27°F. Hard freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
7 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 27°F Hard freeze · Slight Chance Light Rain then Partly Cloudy
- Fri, Nov 6 30°F Freeze · Partly Cloudy
- Sat, Nov 7 31°F Freeze · Partly Cloudy
- Sun, Nov 8 31°F Freeze · Mostly Cloudy
- Mon, Nov 9 32°F Freeze · Mostly Cloudy
- Tue, Nov 10 33°F Frost possible · Partly Cloudy
- Wed, Nov 11 33°F Frost possible · 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 Belgrade
The median first fall hard-freeze date (28°F) is September 28, from NOAA’s 1991–2020 Climate Normals at Bozeman Gallatin Field. 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 | May 30 · Jun 16 · Jul 2 | Aug 20 · Sep 4 · Sep 17 | 79 days |
| 32°F freeze | May 11 · May 26 · Jun 12 | Sep 2 · Sep 16 · Sep 29 | 112 days |
| 28°F hard freeze | Apr 27 · May 9 · May 24 | Sep 15 · Sep 28 · Oct 10 | 140 days |
Average high temperature by month
1991–2020 normals at Bozeman Gallatin Field
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 Belgrade, MT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Bozeman Gallatin Field (station USW00024132, elevation 4,427 ft), 0.9 mi from Belgrade. 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 Belgrade
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Bozeman, MT | 9.3 mi | May 26 | Sep 22 |
| Livingston, MT | 31 mi | May 27 | Sep 14 |
| Helena, MT | 69 mi | May 9 | Sep 30 |
| Butte, MT | 71 mi | Jun 13 | Sep 5 |
| Anaconda, MT | 97 mi | Jun 1 | Sep 14 |
| Laurel, MT | 116 mi | May 5 | Oct 3 |
| Great Falls, MT | 119 mi | May 6 | Oct 1 |
| Lewistown, MT | 120 mi | May 23 | Sep 21 |
| Billings, MT | 127 mi | May 4 | Oct 7 |
| Cody, WY | 135 mi | May 12 | Oct 1 |
Frequently asked questions
When is the last frost in Belgrade?
On average, the last spring frost (32°F) in Belgrade is around May 26. In about 1 year in 10 it comes after June 12, and in 9 years in 10 it comes after May 11.
When is the first frost in Belgrade?
The first fall frost (32°F) usually arrives around September 16. There’s a 10% chance of a freeze by September 2 and a 90% chance by September 29.
Can it frost in Belgrade 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 June 16.
What growing zone is Belgrade?
Belgrade is in USDA Plant Hardiness Zone 5a (average annual extreme minimum temperature −20 to −15°F), based on the 2023 USDA map for ZIP code 59741. See growing zones in Montana.
More: all Montana frost dates · Montana growing zones · frost vs. freeze