North Rim, AZ frost dates
Last spring frostJun 3median date
First fall frostSep 27median date
Growing season116 daysfrost-free
Hardiness zone6bZone 6b
How North Rim compares
- In 8 years out of 10, the last spring frost in North Rim falls between May 16 and June 19, a 34-day window. The first fall frost falls between September 12 and October 10.
- The median last frost is 48 days later than the Arizona median of Apr 16.
- Its 116-day growing season is longer than 4% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 42 days later than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 199 nights a year at or below 32°F.
- Compared with Flagstaff, AZ, 119 km away, the last frost here is 1 day earlier than there and the growing season is the same length.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 16 |
| 50% (median) | June 3 |
| 10% (safe for tender plants) | June 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 12 |
| 50% (median) | September 27 |
| 90% (late) | October 10 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for North Rim, AZ
North Rim, AZ frost dates — last frost Jun 3, first frost Sep 27, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Mar 11 to Mar 25Transplant outside: May 6 to May 20
Start indoors: Mar 25 to Apr 8Transplant outside: Jun 17 to Jul 1
Start indoors: Mar 25 to Apr 8Transplant outside: Jun 17 to Jul 1
Start indoors: Apr 8 to Apr 22Transplant outside: Jun 10 to Jun 24
Start indoors: Apr 8 to Apr 22Transplant outside: May 13 to May 27Sow outdoors: May 6 to Jun 10Plant for fall: Aug 2 to Aug 30
Start indoors: Apr 8 to Apr 22Transplant outside: May 6 to May 20Sow outdoors: May 6 to May 20Plant for fall: Jul 19 to Aug 9
Start indoors: Apr 8 to Apr 22Transplant outside: May 20 to Jun 3Plant for fall: Jun 21 to Jul 12
Start indoors: Apr 8 to Apr 22Transplant outside: May 13 to May 27Plant for fall: Jun 21 to Jul 12
Start indoors: Apr 8 to Apr 22Transplant outside: May 20 to Jun 3Plant for fall: Jun 21 to Jul 12
Start indoors: Apr 22 to May 6Transplant outside: Jun 24 to Jul 8Sow outdoors: Jun 24 to Jul 8
Start indoors: Apr 22 to May 6Transplant outside: Jun 10 to Jun 24
Sow outdoors: Apr 22 to May 13Plant for fall: Jul 5 to Jul 26
Sow outdoors: Apr 22 to May 13Plant for fall: Aug 2 to Aug 23
Sow outdoors: Apr 29 to Jun 10Plant for fall: Aug 16 to Sep 6
Start indoors: May 6 to May 13Transplant outside: Jun 17 to Jun 24Sow outdoors: Jun 10 to Jun 24Plant for fall: Jul 12 to Jul 26
Start indoors: May 6 to May 13Sow outdoors: Jun 10 to Jun 24Plant for fall: Jul 19 to Aug 2
Start indoors: May 6 to May 13Sow outdoors: Jun 10 to Jun 24
Start indoors: May 6 to May 13Transplant outside: Jun 17 to Jul 1
Sow outdoors: May 13 to Jun 10Plant for fall: Jul 5 to Jul 19
Sow outdoors: May 13 to Jun 10Plant for fall: Jul 19 to Aug 2
Sow outdoors: May 13 to Jun 3
Sow outdoors: May 20 to Jun 17Plant for fall: Jul 19 to Aug 2
Sow outdoors: May 20 to Jun 10Plant for fall: Aug 2 to Aug 23
Sow outdoors: Jun 10 to Jul 1
Sow outdoors: Jun 10 to Jun 24
Transplant outside: Jun 17 to Jul 8
Plant for fall: Sep 13 to Oct 18
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in North Rim, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 11 – Mar 25 | May 6 – May 20 | — | — |
| Peppers | Mar 25 – Apr 8 | Jun 17 – Jul 1 | — | — |
| Eggplant | Mar 25 – Apr 8 | Jun 17 – Jul 1 | — | — |
| Tomatoes | Apr 8 – Apr 22 | Jun 10 – Jun 24 | — | — |
| Lettuce | Apr 8 – Apr 22 | May 13 – May 27 | May 6 – Jun 10 | Aug 2 – Aug 30 |
| Kale | Apr 8 – Apr 22 | May 6 – May 20 | May 6 – May 20 | Jul 19 – Aug 9 |
| Broccoli | Apr 8 – Apr 22 | May 20 – Jun 3 | — | Jun 21 – Jul 12 |
| Cabbage | Apr 8 – Apr 22 | May 13 – May 27 | — | Jun 21 – Jul 12 |
| Cauliflower | Apr 8 – Apr 22 | May 20 – Jun 3 | — | Jun 21 – Jul 12 |
| Okra | Apr 22 – May 6 | Jun 24 – Jul 8 | Jun 24 – Jul 8 | — |
| Basil | Apr 22 – May 6 | Jun 10 – Jun 24 | — | — |
| Peas | — | — | Apr 22 – May 13 | Jul 5 – Jul 26 |
| Spinach | — | — | Apr 22 – May 13 | Aug 2 – Aug 23 |
| Radishes | — | — | Apr 29 – Jun 10 | Aug 16 – Sep 6 |
| Cucumbers | May 6 – May 13 | Jun 17 – Jun 24 | Jun 10 – Jun 24 | Jul 12 – Jul 26 |
| Zucchini & Summer Squash | May 6 – May 13 | — | Jun 10 – Jun 24 | Jul 19 – Aug 2 |
| Winter Squash & Pumpkins | May 6 – May 13 | — | Jun 10 – Jun 24 | — |
| Melons & Watermelon | May 6 – May 13 | Jun 17 – Jul 1 | — | — |
| Carrots | — | — | May 13 – Jun 10 | Jul 5 – Jul 19 |
| Beets | — | — | May 13 – Jun 10 | Jul 19 – Aug 2 |
| Potatoes | — | — | May 13 – Jun 3 | — |
| Swiss Chard | — | — | May 20 – Jun 17 | Jul 19 – Aug 2 |
| Cilantro | — | — | May 20 – Jun 10 | Aug 2 – Aug 23 |
| Green Beans | — | — | Jun 10 – Jul 1 | — |
| Sweet Corn | — | — | Jun 10 – Jun 24 | — |
| Sweet Potatoes | — | Jun 17 – Jul 8 | — | — |
| Garlic | — | — | — | Sep 13 – Oct 18 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Bright Angel Rs, AZ weather station, about 1 km away (elevation 7,999 ft (2,438 m)).
Frost dates near North Rim
- Grand Canyon Jun 17 · Sep 24
- Cameron Apr 16 · Oct 28
- Supai Jun 1 · Oct 3
- Marble Canyon Mar 5 · Nov 19
- Gray Mountain Apr 7 · Nov 3
- Kaibeto Apr 16 · Oct 28
- Tuba City Apr 16 · Oct 28
- Williams May 9 · Oct 19
- Fredonia Apr 29 · Oct 22
- Page Mar 27 · Nov 9
Frequently asked questions
When is the last frost in North Rim, AZ?
The median last spring frost in North Rim, AZ is June 3. There is still about a 10% chance of frost after June 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in North Rim, AZ?
The median first fall frost is September 27, with about a 10% chance of frost before September 12.
How long is the growing season in North Rim, AZ?
About 116 days between the median last spring frost and first fall frost.
What planting zone is North Rim, AZ?
North Rim, AZ is in USDA hardiness zone 6b.