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Will it freeze in Benson in the next 7 nights?
No overnight lows at or below 32°F are forecast in Benson during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 46°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 46°F Above 36°F · Mostly Clear
- Fri, Nov 6 47°F Above 36°F · Slight Chance Rain Showers
- Sat, Nov 7 44°F Above 36°F · Clear
- Sun, Nov 8 43°F Above 36°F · Clear
- Mon, Nov 9 46°F Above 36°F · Mostly Clear
- Tue, Nov 10 46°F Above 36°F · Mostly Clear
- Wed, Nov 11 46°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 Benson
The median first fall hard-freeze date (28°F) is November 11, from NOAA’s 1991–2020 Climate Normals at Benson 6SE. 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 12 · Apr 26 · May 10 | Oct 12 · Oct 24 · Nov 5 | 180 days |
| 32°F freeze | Mar 26 · Apr 12 · Apr 29 | Oct 18 · Nov 1 · Nov 15 | 202 days |
| 28°F hard freeze | Mar 2 · Mar 23 · Apr 13 | Oct 27 · Nov 11 · Nov 26 | 232 days |
Average high temperature by month
1991–2020 normals at Benson 6SE
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 Benson, AZ come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Benson 6SE (station USC00020683, elevation 3,690 ft), 5.7 mi from Benson. 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 Benson
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Sierra Vista, AZ | 24 mi | Apr 5 | Nov 9 |
| Tucson, AZ | 36 mi | Feb 5 | Dec 9 |
| Sahuarita, AZ | 37 mi | Feb 25 | Nov 27 |
| Oro Valley, AZ | 52 mi | Apr 2 | Nov 11 |
| Nogales, AZ | 52 mi | Mar 20 | Nov 17 |
| Douglas, AZ | 58 mi | Mar 18 | Nov 13 |
| Marana, AZ | 61 mi | Apr 2 | Nov 11 |
| Thatcher, AZ | 70 mi | Mar 25 | Nov 9 |
| Safford, AZ | 73 mi | Mar 25 | Nov 9 |
| Eloy, AZ | 93 mi | Feb 24 | Nov 28 |
Frequently asked questions
When is the last frost in Benson?
On average, the last spring frost (32°F) in Benson is around April 12. In about 1 year in 10 it comes after April 29, and in 9 years in 10 it comes after March 26.
When is the first frost in Benson?
The first fall frost (32°F) usually arrives around November 1. There’s a 10% chance of a freeze by October 18 and a 90% chance by November 15.
Can it frost in Benson 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 April 26.
What growing zone is Benson?
Benson is in USDA Plant Hardiness Zone 8b (average annual extreme minimum temperature 15 to 20°F), based on the 2023 USDA map for ZIP code 85627. See growing zones in Arizona.
More: all Arizona frost dates · Arizona growing zones · frost vs. freeze