Checking current alerts… View NWS forecast and alerts.
Will it freeze in Mammoth Lakes in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 30°F (Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST).
Tonight: forecast low 30°F. Freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
5 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 30°F Freeze · Mostly Clear
- Fri, Nov 6 34°F Frost possible · Mostly Clear
- Sat, Nov 7 37°F Above 36°F · Mostly Clear
- Sun, Nov 8 37°F Above 36°F · Mostly Clear
- Mon, Nov 9 35°F Frost possible · Partly Cloudy
- Tue, Nov 10 36°F Frost possible · Mostly Clear
- Wed, Nov 11 34°F Frost possible · Slight Chance Light Snow
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 Mammoth Lakes
The median first fall hard-freeze date (28°F) is October 1, from NOAA’s 1991–2020 Climate Normals at Mammoth Lakes Ranger Station. 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 | rare in most years | rare in most years | 73 days |
| 32°F freeze | May 29 · Jun 10 · Jun 30 | Sep 2 · Sep 17 · Oct 2 | 98 days |
| 28°F hard freeze | May 9 · May 31 · Jun 16 | Sep 15 · Oct 1 · Oct 16 | 124 days |
Average high temperature by month
1991–2020 normals at Mammoth Lakes Ranger Station
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 Mammoth Lakes, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Mammoth Lakes Ranger Station (station USC00045280, elevation 7,804 ft), 2.2 mi from Mammoth Lakes. 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 Mammoth Lakes
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Clovis, CA | 67 mi | Jan 14 | Dec 14 |
| Sanger, CA | 71 mi | Jan 30 | Dec 11 |
| Orange Cove, CA | 71 mi | Jan 23 | Dec 13 |
| Fresno, CA | 73 mi | Jan 14 | Dec 14 |
| Reedley, CA | 75 mi | Jan 30 | Dec 11 |
| Madera, CA | 76 mi | Feb 12 | Nov 30 |
| Parlier, CA | 76 mi | Jan 30 | Dec 11 |
| Chowchilla, CA | 77 mi | Feb 12 | Nov 30 |
| Dinuba, CA | 78 mi | Jan 23 | Dec 13 |
| Fowler, CA | 79 mi | Jan 30 | Dec 11 |
Frequently asked questions
When is the last frost in Mammoth Lakes?
On average, the last spring frost (32°F) in Mammoth Lakes is around June 10. In about 1 year in 10 it comes after June 30, and in 9 years in 10 it comes after May 29.
When is the first frost in Mammoth Lakes?
The first fall frost (32°F) usually arrives around September 17. There’s a 10% chance of a freeze by September 2 and a 90% chance by October 2.
What growing zone is Mammoth Lakes?
Mammoth Lakes 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 93546. See growing zones in California.
More: all California frost dates · California growing zones · frost vs. freeze