When is the last frost in Pueblo, CO?

The average (50% probability) last spring frost in Pueblo is April 30, based on NOAA 1991–2020 normals. A 1-in-10 risk remains until May 12.

When is the first frost in Pueblo?

The average first fall frost in Pueblo is October 9, with a growing season of about 161 days.

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Pueblo, Colorado frost dates

Average last spring frost: April 30. Average first fall frost: October 9. That gives a growing season of about 161 days. For frost-tender plants, a safer planting date is May 12, after which a freeze happens in only 1 year in 10.

Last frost (50%)

Apr 30

1-in-10 risk after May 12

First frost (50%)

Oct 9

1-in-10 risk before Sep 27

Growing season

161 days

median frost-free days

Hard freeze (28°F)

Apr 19

median last 28°F in spring

Frost risk by date

Chance of frost	Spring: frost after	Fall: frost before
90%	April 18	October 21
70%	April 26	October 14
50%	April 30	October 9
30%	May 4	October 4
10%	May 12	September 27

Read the spring column like this: there is a 10% chance of a 32°F freeze after May 12. These are NOAA probabilities for the Pueblo Mem Airport weather station (USW00093058, elevation 1439 m), 1991–2020.

Pueblo vegetable planting calendar

Dates count from the 50% last-frost date (April 30). For tomatoes, peppers and other frost-tender crops, waiting until the 10% date (May 12) is the cautious choice.

Crop	Start seeds indoors	Plant out
Beans	Apr 9	May 7 (usually sown directly in the garden)
Broccoli	Feb 19	Apr 2
Brussels sprouts	Feb 19	Apr 2
Cabbage	Feb 12	Mar 26
Cauliflower	Mar 5	Apr 16
Sweet corn	Apr 2	Apr 30 (usually sown directly in the garden)
Cucumbers	Apr 16	May 7
Kale	Feb 12	Mar 26
Leeks	Jan 15	Mar 26
Lettuce	Mar 12	Apr 16
Melons	Apr 23	May 14
Onions	Jan 8	Mar 19 (from seed; sets and transplants go out at the same time)
Peas	Mar 5	Apr 2 (usually sown directly in the garden)
Peppers	Mar 19	May 14
Squash	Apr 23	May 14
Tomatoes	Mar 5	Apr 30

Offsets from Oregon State University Extension's seed-starting table. "Plant out" means transplant, or sow directly for crops usually grown from seed.

Fall frost and season extension

The first fall freeze usually arrives around October 9. There's a 1-in-10 chance it comes before September 27. Harvest tender crops such as basil, tomatoes, peppers and squash before then, or cover them on cold nights. Cool-season crops like kale, cabbage and Brussels sprouts handle light frost, and often taste sweeter after it. A hard freeze (28°F) typically comes around October 18.

Nearby cities

City	Last frost (50%)	First frost (50%)	Distance
Colorado Springs, CO	May 3	Oct 8	~60 km
Denver, CO	May 5	Oct 9	~172 km
Cheyenne, WY	May 12	Oct 1	~319 km
Santa Fe, NM	May 4	Oct 15	~327 km
Grand Junction, CO	Apr 28	Oct 16	~364 km
Albuquerque, NM	Apr 6	Nov 3	~405 km

More: all Colorado frost dates