Frost dates for 85308 — Glendale, AZ
Frost is light and occasional here — typically a few cold nights around midwinter (about 3 a year). Cover tender plants when frost is forecast.
How Glendale compares
- In a typical year, frost nights in Glendale fall between December 25 and January 8. In 1 year in 10 the first frost comes as early as December 5, or the last frost as late as February 12.
- Compared with Phoenix, AZ, 20 km away, the last frost here is 3 days later than there.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 16 |
| 50% (median) | January 8 |
| 10% (safe for tender plants) | February 12 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | December 5 |
| 50% (median) | December 25 |
| 90% (late) | January 23 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Gardening where frost is rare
Glendale, AZ only freezes on a few winter nights, so the usual "plant after the last frost" rule doesn't apply. Heat and rainfall decide the seasons instead:
- Cool-season crops (lettuce, broccoli, peas, carrots) grow best from fall through late winter.
- Warm-season crops (tomatoes, peppers, beans, squash) do best planted in late winter to spring, and again in late summer for a fall crop — midsummer heat can stop tomatoes setting fruit.
- Heat lovers (okra, sweet potatoes, melons) can be planted through spring and early summer.
About these dates
Based on 1991–2020 NOAA climate normals for the Phoenix Deer Valley Muni Ap, AZ weather station, 9 km away (elevation 1,457 ft (444 m)).
ZIP codes in Glendale: 85301 85302 85303 85304 85305 85306 85307 85308 85310 85311 85312 85318
Frost dates near Glendale
- Peoria Jan 20 · Dec 15
- Sun City Jan 20 · Dec 15
- Luke Air Force Base Jan 20 · Dec 15
- Youngtown Jan 20 · Dec 15
- El Mirage Jan 20 · Dec 15
- Sun City West Jan 20 · Dec 15
- Phoenix Jan 5 · Jan 3
- Surprise Jan 20 · Dec 15
Frequently asked questions
When is the last frost in Glendale, AZ?
The median last spring frost in Glendale, AZ is January 8. There is still about a 10% chance of frost after February 12, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Glendale, AZ?
The median first fall frost is December 25, with about a 10% chance of frost before December 5.
How long is the growing season in Glendale, AZ?
About 351 days between the median last spring frost and first fall frost.
What planting zone is Glendale, AZ?
Glendale, AZ is in USDA hardiness zone 9b.