Last frost date in Marana, Arizona
April 2
Average last frost in spring. In an early year (1 in 10) it's over by March 16; in a late year (1 in 10) it comes after April 18.
November 11
Average first frost in fall. 1 year in 10 it comes by October 26.
Source: NOAA U.S. Climate Normals 1991–2020, station Catalina Sp (USC00021357), 12.4 miles from Marana, elevation 2,707 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Oro Valley, so its frost dates are the same as Marana's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 16 | Apr 2 | Apr 18 |
| First frost in fall | Oct 26 | Nov 11 | Nov 29 |
Frost-free days in an average year: 222
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 18 | Nov 1 |
| Frost (32°F) | Every year | Apr 2 | Nov 11 |
| Hard freeze (28°F) | Every year | Mar 12 | Nov 21 |
Nights at 32°F or colder in an average year: 67
What to plant now in Marana
- Mustard greensAug 15 – Nov 1Now
- Garden peasSept 1 – Nov 1Now
- ParsleySept 1 – Nov 15Now
- RadishesSept 1 – Nov 15Now
- SpinachSept 15 – Nov 1Now
- Corn saladOct 1 – Dec 1Now
- Onion setsOct 1 – Dec 1Now
- Upland cressOct 1 – Dec 1Now
- Asparagus plantsDec 1 – Jan 1Soon
- Spring planting calendar for an average last frost around March 30 Marana: April 2
- Fall planting calendar for an average first frost around November 10 Marana: November 11
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.