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Will it freeze in Fountain Hills in the next 7 nights?
No overnight lows at or below 32°F are forecast in Fountain Hills during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 55°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 55°F Above 36°F · Partly Cloudy
- Fri, Nov 6 57°F Above 36°F · Mostly Clear
- Sat, Nov 7 56°F Above 36°F · Clear
- Sun, Nov 8 57°F Above 36°F · Mostly Clear
- Mon, Nov 9 57°F Above 36°F · Mostly Clear
- Tue, Nov 10 56°F Above 36°F · Mostly Clear
- Wed, Nov 11 55°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 Fountain Hills
Most years have no 28°F hard freeze at Fountain Hills, 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 | Dec 31 · Jan 31 · Mar 1 | Nov 25 · Dec 14 · Jan 3 | 317 days |
| 32°F freeze | Dec 14 · Jan 6 · Feb 11 | Dec 4 · Dec 28 · Jan 27 | 356 days |
| 28°F hard freeze | Dec 27 · Jan 9 · Jan 31 | Dec 26 · Jan 8 · Jan 31 | 365 days |
Average high temperature by month
1991–2020 normals at Fountain Hills
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 Fountain Hills, AZ come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Fountain Hills (station USC00023190, elevation 1,580 ft), 1.5 mi from Fountain Hills. 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 Fountain Hills
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Scottsdale, AZ | 8.7 mi | Jan 27 | Dec 21 |
| Paradise Valley, AZ | 14 mi | Jan 6 | Dec 26 |
| Mesa, AZ | 14 mi | Feb 1 | Dec 10 |
| Tempe, AZ | 19 mi | Feb 13 | Dec 5 |
| Apache Junction, AZ | 19 mi | Feb 11 | Dec 10 |
| Phoenix, AZ | 21 mi | Jan 8 | Dec 25 |
| Gilbert, AZ | 21 mi | Feb 1 | Dec 11 |
| Cave Creek, AZ | 21 mi | Feb 4 | Dec 16 |
| Guadalupe, AZ | 21 mi | Feb 13 | Dec 5 |
| Chandler, AZ | 24 mi | Feb 13 | Dec 5 |
Frequently asked questions
When is the last frost in Fountain Hills?
On average, the last spring frost (32°F) in Fountain Hills is around January 6. In about 1 year in 10 it comes after February 11, and in 9 years in 10 it comes after December 14.
When is the first frost in Fountain Hills?
The first fall frost (32°F) usually arrives around December 28. There’s a 10% chance of a freeze by December 4 and a 90% chance by January 27.
Can it frost in Fountain Hills 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 January 31.
What growing zone is Fountain Hills?
Fountain Hills 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 85268. See growing zones in Arizona.
More: all Arizona frost dates · Arizona growing zones · frost vs. freeze