Checking current alerts… View NWS forecast and alerts.
Will it freeze in Phoenix in the next 7 nights?
No overnight lows at or below 32°F are forecast in Phoenix during the next 7 nights in the available NWS frost forecast.
Overnight: forecast low 55°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 5:00 AM MST to Thu, Nov 5, 6:00 AM MST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Overnight 55°F Above 36°F · Clear
- Tonight 56°F Above 36°F · Partly Cloudy
- Fri, Nov 6 59°F Above 36°F · Mostly Clear
- Sat, Nov 7 58°F Above 36°F · Clear
- Sun, Nov 8 58°F Above 36°F · Mostly Clear
- Mon, Nov 9 59°F Above 36°F · Mostly Clear
- Tue, Nov 10 57°F Above 36°F · Mostly Clear
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 Phoenix
Most years have no 28°F hard freeze at Phoenix Deer Valley Municipal Airport, according to NOAA’s 1991–2020 Climate Normals. Check the short-term forecast above during cold snaps.
| 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 | Jan 1 · Feb 1 · Mar 2 | Nov 25 · Dec 11 · Dec 29 | 314 days |
| 32°F freeze | Dec 16 · Jan 8 · Feb 12 | Dec 5 · Dec 25 · Jan 23 | 354 days |
| 28°F hard freeze | Dec 15 · Jan 8 · Feb 2 | Dec 14 · Jan 7 · Feb 1 | 365 days |
Average high temperature by month
1991–2020 normals at Phoenix Deer Valley Municipal Airport
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 Phoenix, AZ come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Phoenix Deer Valley Municipal Airport (station USW00003184, elevation 1,455 ft), 8.0 mi from Phoenix. 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 Phoenix
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Glendale, AZ | 6.2 mi | Jan 20 | Dec 15 |
| Paradise Valley, AZ | 7.5 mi | Jan 6 | Dec 26 |
| Youngtown, AZ | 12 mi | Jan 20 | Dec 15 |
| Tolleson, AZ | 13 mi | Jan 7 | Dec 24 |
| El Mirage, AZ | 14 mi | Jan 20 | Dec 15 |
| Scottsdale, AZ | 16 mi | Jan 27 | Dec 21 |
| Tempe, AZ | 16 mi | Feb 13 | Dec 5 |
| Guadalupe, AZ | 16 mi | Feb 13 | Dec 5 |
| Litchfield Park, AZ | 16 mi | Jan 7 | Dec 24 |
| Cave Creek, AZ | 19 mi | Feb 4 | Dec 16 |
Frequently asked questions
When is the last frost in Phoenix?
On average, the last spring frost (32°F) in Phoenix is around January 8. In about 1 year in 10 it comes after February 12, and in 9 years in 10 it comes after December 16.
When is the first frost in Phoenix?
The first fall frost (32°F) usually arrives around December 25. There’s a 10% chance of a freeze by December 5 and a 90% chance by January 23.
Can it frost in Phoenix 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 February 1.
What growing zone is Phoenix?
Phoenix is in USDA Plant Hardiness Zone 9b (average annual extreme minimum temperature 25 to 30°F), based on the 2023 USDA map for ZIP code 85021. See growing zones in Arizona.
More: all Arizona frost dates · Arizona growing zones · UV index today in Phoenix · frost vs. freeze