Last frost date in Aurora, Colorado
May 7
Average last frost in spring. In an early year (1 in 10) it's over by April 26; in a late year (1 in 10) it comes after May 21.
October 8
Average first frost in fall. 1 year in 10 it comes by September 25.
Source: NOAA U.S. Climate Normals 1991–2020, station Cherry Creek Dam (USC00051547), 8.3 miles from Aurora, elevation 5,647 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 26 | May 7 | May 21 |
| First frost in fall | Sept 25 | Oct 8 | Oct 19 |
An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.
Frost-free days in an average year: 152
Planting calendar for Aurora
Fall planting
USDA dates for places whose average first freeze is about October 10 (Aurora: October 8).
- Eggplant plantsMay 15 – June 15 (past for this year)
- PotatoesMay 15 – June 15 (past for this year)
- Sweet potatoesMay 20 – June 10 (past for this year)
- Black-eyed peasJune 1 – July 1 (past for this year)
- Cabbage plantsJune 1 – July 15 (past for this year)
- Cantaloupe (muskmelon)June 1 – 15 (past for this year)
- CarrotsJune 1 – July 20 (past for this year)
- Cauliflower plantsJune 1 – July 25 (past for this year)
- Celery and celeriac plantsJune 1 – July 15 (past for this year)
- CucumbersJune 1 – July 1 (past for this year)
- Lima beansJune 1 – 15 (past for this year)
- New Zealand spinachJune 1 – July 15 (past for this year)
- OkraJune 1 – July 15 (past for this year)
- ParsnipsJune 1 – July 10 (past for this year)
- Peppers plantsJune 1 – July 1 (past for this year)
- SalsifyJune 1 – July 1 (past for this year)
- SoybeansJune 1 – 25 (past for this year)
- Summer squashJune 1 – July 15 (past for this year)
- Sweet cornJune 1 – July 10 (past for this year)
- Swiss chardJune 1 – July 20 (past for this year)
- TomatoesJune 1 – 20 (past for this year)
- WatermelonJune 1 – 15 (past for this year)
- Winter squashJune 1 – July 1 (past for this year)
- Witloof chicoryJune 1 – July 1 (past for this year)
- BeetsJune 15 – July 25 (past for this year)
- Broccoli plantsJune 15 – July 15 (past for this year)
- Brussels sprouts plantsJune 15 – July 15 (past for this year)
- Chinese cabbageJune 15 – Aug 1 (past for this year)
- Florence fennelJune 15 – July 15 (past for this year)
- ParsleyJune 15 – Aug 1 (past for this year)
- RutabagaJune 15 – July 15 (past for this year)
- Snap beansJune 15 – July 20 (past for this year)
- Collards plantsJuly 1 – Aug 1 (past for this year)
- EndiveJuly 1 – Aug 15 (past for this year)
- KaleJuly 1 – Aug 1 (past for this year)
- KohlrabiJuly 1 – Aug 1 (past for this year)
- SorrelJuly 1 – Aug 1 (past for this year)
- TurnipsJuly 1 – Aug 1 (past for this year)
- DandelionJuly 15 – Sept 1 (past for this year)
- Head lettuce plantsJuly 15 – Aug 15 (past for this year)
- Leaf lettuceJuly 15 – Sept 1 (past for this year)
- Mustard greensJuly 15 – Aug 15 (past for this year)
- RadishesJuly 15 – Sept 15 (past for this year)
- SpinachAug 1 – Sept 1 (past for this year)
- Corn saladAug 15 – Sept 15 (past for this year)
- Upland cressAug 15 – Sept 15 (past for this year)
- Rhubarb plantsOct 15 – Nov 15Now
- Asparagus plantsOct 20 – Nov 15Now
USDA lists chervil and chives, garlic, horseradish, leeks, onion plants, onion seed, onion sets, garden peas, shallots as generally spring-planted here.
Spring planting
USDA dates for places whose average last freeze is about May 10 (Aurora: May 7).
- Cabbage plantsApr 1 – May 15
- Chervil and chivesApr 1 – May 1
- Chinese cabbageApr 1 – May 15
- Corn saladApr 1 – June 1
- DandelionApr 1 – May 1
- Garden peasApr 1 – May 15
- GarlicApr 1 – May 1
- Onion seedApr 1 – May 1
- PotatoesApr 1 – June 1
- RadishesApr 1 – June 1
- Rhubarb plantsApr 1 – May 1
- SpinachApr 1 – June 15
- TurnipsApr 1 – June 1
- Asparagus plantsApr 10 – 30
- KaleApr 10 – May 1
- KohlrabiApr 10 – May 15
- Onion plants plantsApr 10 – May 1
- Onion setsApr 10 – May 1
- ShallotsApr 10 – May 1
- BeetsApr 15 – June 15
- Broccoli plantsApr 15 – June 1
- Brussels sprouts plantsApr 15 – June 1
- Cauliflower plantsApr 15 – May 15
- Collards plantsApr 15 – June 1
- EndiveApr 15 – May 15
- Florence fennelApr 15 – May 15
- Head lettuce plantsApr 15 – May 15
- Horseradish plantsApr 15 – May 15
- Leaf lettuceApr 15 – June 15
- LeeksApr 15 – May 15
- Mustard greensApr 15 – June 1
- ParsleyApr 15 – May 15
- ParsnipsApr 15 – May 15
- SalsifyApr 15 – June 1
- SorrelApr 15 – June 1
- CarrotsApr 20 – June 15
- Celery and celeriac plantsApr 20 – June 15
- Swiss chardApr 20 – June 15
- Upland cressApr 20 – May 20
- RutabagaMay 1 – June 1
- New Zealand spinachMay 10 – June 15
- Snap beansMay 10 – June 30
- Summer squashMay 10 – June 10
- Sweet cornMay 10 – June 1
- TomatoesMay 15 – June 10
- CucumbersMay 20 – June 15
- Eggplant plantsMay 20 – June 15
- OkraMay 20 – June 10
- Peppers plantsMay 20 – June 10
- Lima beansMay 25 – June 15
- SoybeansMay 25 – June 10
- Cantaloupe (muskmelon)June 1 – 15
- WatermelonJune 1 – 15
- Witloof chicoryJune 1 – 20
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.
Nearby in Colorado
- Denver 9 mi · last frost May 4
- Centennial 11 mi · last frost May 5
- Greenwood Village 12 mi · last frost May 7
- Commerce City 13 mi · last frost May 3
- Parker 14 mi · last frost May 9