When is the last frost in Fort Mohave, AZ?

For ZIP code 86427, the average last spring frost (32°F) is January 4, based on NOAA 1991-2020 climate normals for the Bullhead City, AZ weather station. There is a 1-in-10 chance of a frost after February 5.

When is the first frost in Fort Mohave, AZ?

The average first fall frost (32°F) is December 23. There is a 1-in-10 chance of frost by December 1, so tender plants are at risk from that point on.

How long is the growing season in 86427?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 356 days long.

Are these frost dates a forecast?

No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.

Frost dates for 86427Fort Mohave, AZ

The average last spring frost in Fort Mohave is January 4 and the average first fall frost is December 23, giving a typical growing season of about 356 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 4
Average first fall frost: Dec 23
Growing season: 356 days

Frost risk by date

NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.

Spring dates: chance of a frost AFTER the date. Fall dates: chance of a frost BEFORE the date.
Temperature	Last spring: 90% / 50% / 10% chance	First fall: 10% / 50% / 90% chance	Growing season (50%)	Years with at least one
Light frost (36°F)	Dec 31 · Feb 1 · Feb 28	Nov 24 · Dec 11 · Jan 2	317 days	97%
Frost / freeze (32°F)	Dec 12 · Jan 4 · Feb 5	Dec 1 · Dec 23 · Jan 23	356 days	67%
Hard freeze (28°F)	Dec 7 · Dec 26 · Jan 10	Dec 7 · Dec 25 · Jan 8	365 days	18%

Where these dates come from

ZIP code 86427 is matched to the NOAA station Bullhead City, AZ, 15.3 km away, at 531 ft elevation (47 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Bullhead City, AZ (used)	531 ft	Jan 4	Dec 23
Laughlin, NV	605 ft	Jan 5	Dec 24
Needles Ap, CA	890 ft	Jan 6	Jan 2
Yucca 1 Nne, AZ	1,950 ft	Feb 18	Dec 2

Frost dates near Fort Mohave

Fort Mohave, AZ 86426 · last Jan 5, first Dec 24
Bullhead City, AZ 86442 · last Jan 5, first Dec 24
Mohave Valley, AZ 86440 · last Jan 4, first Dec 23
Laughlin, NV 89029 · last Jan 5, first Dec 24
Oatman, AZ 86433 · last Feb 18, first Dec 2
Needles, CA 92363 · last Jan 6, first Jan 2
Topock, AZ 86436 · last Jan 6, first Jan 2
Cal Nev Ari, NV 89039 · last Mar 7, first Nov 29

Frequently asked questions

When is the last frost in Fort Mohave, AZ?: For ZIP code 86427, the average last spring frost (32°F) is January 4, based on NOAA 1991-2020 climate normals for the Bullhead City, AZ weather station. There is a 1-in-10 chance of a frost after February 5.
When is the first frost in Fort Mohave, AZ?: The average first fall frost (32°F) is December 23. There is a 1-in-10 chance of frost by December 1, so tender plants are at risk from that point on.
How long is the growing season in 86427?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 356 days long.
Are these frost dates a forecast?: No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.