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Will it freeze in Lamar in the next 7 nights?
No overnight lows at or below 32°F are forecast in Lamar 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.
5 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 33°F Frost possible · Partly Cloudy
- Fri, Nov 6 33°F Frost possible · Mostly Cloudy
- Sat, Nov 7 33°F Frost possible · Mostly Clear
- Sun, Nov 8 35°F Frost possible · Clear
- Mon, Nov 9 35°F Frost possible · Mostly Clear
- Tue, Nov 10 37°F Above 36°F · Partly Cloudy
- Wed, Nov 11 37°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 Lamar
The median first fall hard-freeze date (28°F) is October 20, from NOAA’s 1991–2020 Climate Normals at Lamar. 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 29 · May 10 · May 23 | Sep 23 · Oct 4 · Oct 14 | 145 days |
| 32°F freeze | Apr 17 · Apr 30 · May 13 | Oct 1 · Oct 10 · Oct 21 | 163 days |
| 28°F hard freeze | Apr 5 · Apr 18 · May 2 | Oct 7 · Oct 20 · Oct 30 | 183 days |
Average high temperature by month
1991–2020 normals at Lamar
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 Lamar, CO come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Lamar (station USC00054770, elevation 3,627 ft), 1.5 mi from Lamar. 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 Lamar
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| La Junta, CO | 51 mi | Apr 26 | Oct 15 |
| Ulysses, KS | 77 mi | Apr 28 | Oct 16 |
| Garden City, KS | 96 mi | Apr 28 | Oct 17 |
| Pueblo, CO | 109 mi | Apr 30 | Oct 9 |
| Guymon, OK | 114 mi | Apr 18 | Oct 23 |
| Liberal, KS | 117 mi | Apr 20 | Oct 24 |
| Fountain, CO | 120 mi | May 3 | Oct 8 |
| Trinidad, CO | 120 mi | Apr 30 | Oct 15 |
| Colby, KS | 124 mi | May 2 | Oct 9 |
| Colorado Springs, CO | 128 mi | May 3 | Oct 8 |
Frequently asked questions
When is the last frost in Lamar?
On average, the last spring frost (32°F) in Lamar is around April 30. In about 1 year in 10 it comes after May 13, and in 9 years in 10 it comes after April 17.
When is the first frost in Lamar?
The first fall frost (32°F) usually arrives around October 10. There’s a 10% chance of a freeze by October 1 and a 90% chance by October 21.
Can it frost in Lamar 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 10.
What growing zone is Lamar?
Lamar 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 81052. See growing zones in Colorado.
More: all Colorado frost dates · Colorado growing zones · frost vs. freeze