Frost Dates for Cheyenne, WY 82001
Last spring frost May 12 · First fall frost September 26 · 137 frost-free days · USDA Zone 5b
ZIP 82001 has about 38,200 people, the largest of 3 ZIP codes in Cheyenne.
Moderate season: 137 frost-free days. Spring frost risk spans April 27–May 26 (29 days). Fall frost risk spans September 14–October 8 (24 days).
Frost probability for 82001
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 26 | May 12 | April 27 |
| Fall (first frost) | September 14 | September 26 | October 8 |
Dates come from NOAA 1971–2000 freeze probabilities at CHEYENNE WSFO AP (12.6 km away); the 50% date is the median year.
Frost dates by ZIP code in Cheyenne, WY
| ZIP | Last spring frost (50%) | First fall frost (50%) | Zone |
|---|---|---|---|
| 82001 | May 12 | September 26 | 5b |
| 82009 | May 26 | September 21 | 5b |
| 82007 | May 18 | September 24 | 5b |
Which crops fit a 137-day season in Cheyenne
In Cheyenne (137 frost-free days, a moderate season), 39 of 56 planner crops fit outright, 16 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Apr 7 | May 26–Jun 2 | 95 | fits: 80 days to maturity, 95 available after May 26. | May 27 |
| Pepper | Mar 31 | May 26–Jun 2 | 95 | fits: 75 days to maturity, 95 available after May 26. | Jun 1 |
| Lettuce | Mar 17 | Apr 14–Apr 21 | 172 | two-plantings: Plant Apr 14 and again by Aug 5; both mature before Oct 3. | Aug 5 |
| Carrots | — | Apr 21–Apr 28 | 179 | fits: 70 days to maturity, 179 available after Apr 21. | Jul 25 |
| Cucumber | Apr 21 | May 26–Jun 2 | 109 | fits: 60 days to maturity, 109 available after May 26. | Jun 30 |
| Beans | — | May 19–Jun 2 | 123 | fits: 60 days to maturity, 123 available after May 19. | Jul 7 |
| Peas | — | Mar 17–May 26 | 200 | fits: 65 days to maturity, 200 available after Mar 17. | Jul 16 |
| Zucchini | Apr 28 | May 26–Jun 2 | 109 | fits: 55 days to maturity, 109 available after May 26. | Jul 5 |
| Onion | Feb 17 | Apr 14–Apr 28 | 172 | fits: 100 days to maturity, 172 available after Apr 14. | — |
| Spinach | — | Mar 17–May 5 | 214 | two-plantings: Plant Mar 17 and again by Aug 24; both mature before Oct 17. | Aug 24 |
| Kale | Mar 3 | Apr 14–Apr 28 | 186 | two-plantings: Plant Apr 14 and again by Aug 9; both mature before Oct 17. | Aug 9 |
| Broccoli | Mar 17 | Apr 14–Apr 28 | 172 | fits: 80 days to maturity, 172 available after Apr 14. | Jul 1 |
| Cabbage | Mar 17 | Apr 14–Apr 28 | 186 | fits: 70 days to maturity, 186 available after Apr 14. | Jul 25 |
| Radish | — | Mar 17–Jun 9 | 200 | two-plantings: Plant Mar 17 and again by Aug 25; both mature before Oct 3. | Aug 25 |
| Beets | — | Mar 17–Jun 9 | 200 | two-plantings: Plant Mar 17 and again by Jul 26; both mature before Oct 3. | Jul 26 |
| Potatoes | — | Apr 28–May 5 | 158 | fits: 90 days to maturity, 158 available after Apr 28. | — |
| Garlic | — | Sep 26 | 242 | overwinter: Plant Sep 26 to Oct 17; harvest the following summer. | Oct 17 |
| Strawberry | — | Apr 7–Jun 2 | 193 | perennial: A perennial: plant Apr 7; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 14 | May 19–May 26 | 109 | fits: 75 days to maturity, 109 available after May 19. | Jun 8 |
| Pumpkin | Apr 28 | May 26–May 26 | 102 | fits: 100 days to maturity, 102 available after May 26. | — |
| Cauliflower | Mar 31 | May 5–May 19 | 151 | fits: 75 days to maturity, 151 available after May 5. | Jul 6 |
| Swiss Chard | Mar 17 | Apr 28–Apr 28 | 158 | two-plantings: Plant Apr 28 and again by Jul 26; both mature before Oct 3. | Jul 26 |
| Arugula | — | Mar 17–Jun 9 | 214 | two-plantings: Plant Mar 17 and again by Aug 24; both mature before Oct 17. | Aug 24 |
| Brussel Sprouts | Mar 17 | Apr 14–Apr 28 | 186 | fits: 100 days to maturity, 186 available after Apr 14. | Jun 25 |
| Butternut Squash | Apr 28 | May 26–Jun 2 | 102 | fits: 100 days to maturity, 102 available after May 26. | — |
| Eggplant | Mar 24 | May 26–Jun 2 | 95 | fits: 70 days to maturity, 95 available after May 26. | Jun 6 |
| Okra | Apr 14 | May 19–May 26 | 116 | fits: 55 days to maturity, 116 available after May 19. | Jul 5 |
| Basil | Apr 7 | Jun 2–Jun 2 | 102 | fits: 60 days to maturity, 102 available after Jun 2. | Jun 30 |
| Cilantro | — | Apr 14–May 5 | 172 | two-plantings: Plant Apr 14 and again by Jul 31; both mature before Oct 3. | Jul 31 |
| Parsley | Mar 3 | May 19–May 26 | 137 | fits: 70 days to maturity, 137 available after May 19. | Jul 11 |
| Celery | Mar 3 | May 19–Jun 2 | 137 | fits: 120 days to maturity, 137 available after May 19. | May 22 |
| Scallions | Mar 3 | Apr 14–Apr 28 | 186 | two-plantings: Plant Apr 14 and again by Aug 4; both mature before Oct 17. | Aug 4 |
| Turnip | — | Apr 14–Apr 28 | 186 | two-plantings: Plant Apr 14 and again by Aug 14; both mature before Oct 17. | Aug 14 |
| Kohlrabi | — | Mar 31–Apr 14 | 200 | two-plantings: Plant Mar 31 and again by Aug 9; both mature before Oct 17. | Aug 9 |
| Bok Choy | Apr 14 | May 5–May 12 | 151 | two-plantings: Plant May 5 and again by Aug 5; both mature before Oct 3. | Aug 5 |
| Collards | Mar 3 | Apr 14–Apr 28 | 186 | two-plantings: Plant Apr 14 and again by Aug 4; both mature before Oct 17. | Aug 4 |
| Cantaloupe | Apr 28 | May 26–Jun 2 | 95 | fits: 85 days to maturity, 95 available after May 26. | — |
| Chives | Feb 17 | May 19–May 26 | 151 | fits: 90 days to maturity, 151 available after May 19. | — |
| Dill | — | Mar 17–Jun 9 | 200 | two-plantings: Plant Mar 17 and again by Jul 26; both mature before Oct 3. | Jul 26 |
| Oregano | Mar 3 | May 19–May 26 | 151 | fits: 80 days to maturity, 151 available after May 19. | — |
| Rosemary | Feb 17 | May 19–May 26 | 137 | fits: 80 days to maturity, 137 available after May 19. | — |
| Sage | Mar 17 | May 19–May 26 | 151 | fits: 75 days to maturity, 151 available after May 19. | — |
| Thyme | Mar 3 | May 19–May 26 | 151 | fits: 90 days to maturity, 151 available after May 19. | — |
| Calendula | Mar 31 | Apr 28–May 12 | 158 | two-plantings: Plant Apr 28 and again by Jul 31; both mature before Oct 3. | Jul 31 |
| Cosmos | Apr 14 | May 12–May 26 | 123 | fits: 60 days to maturity, 123 available after May 12. | Jun 30 |
| Lavender | Feb 17 | May 12–May 26 | 158 | fits: 90 days to maturity, 158 available after May 12. | — |
| Marigolds | Mar 31 | May 12–May 19 | 123 | two-plantings: Plant May 12 and again by Jul 10; both mature before Sep 12. | Jul 10 |
| Melons | Apr 28 | May 26–Jun 2 | 95 | fits: 85 days to maturity, 95 available after May 26. | — |
| Mint | — | May 12–May 26 | 158 | fits: 90 days to maturity, 158 available after May 12. | — |
| Nasturtiums | Apr 14 | May 12–May 19 | 123 | fits: 55 days to maturity, 123 available after May 12. | Jul 5 |
| Pole Beans | — | May 19–Jun 2 | 116 | fits: 65 days to maturity, 116 available after May 19. | Jun 25 |
| Spaghetti Squash | Apr 28 | May 26–Jun 2 | 102 | fits: 90 days to maturity, 102 available after May 26. | — |
| Sunflowers | — | May 12–May 26 | 123 | fits: 70 days to maturity, 123 available after May 12. | Jun 20 |
| Tomatillos | Mar 17 | May 19–May 26 | 102 | fits: 75 days to maturity, 102 available after May 19. | Jun 1 |
| Watermelon | Apr 28 | May 19–May 26 | 102 | fits: 80 days to maturity, 102 available after May 19. | May 27 |
| Yellow Squash | Apr 28 | May 26–Jun 2 | 109 | fits: 55 days to maturity, 109 available after May 26. | Jul 5 |
| Zinnias | Apr 14 | May 12–May 26 | 123 | fits: 60 days to maturity, 123 available after May 12. | Jun 30 |
Month by month in Cheyenne
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 17), Lavender (Feb 17), Onion (Feb 17), Rosemary (Feb 17). |
| March | Start indoors: Celery (Mar 3), Collards (Mar 3), Kale (Mar 3), Oregano (Mar 3), Parsley (Mar 3), Scallions (Mar 3), +13 more. Direct sow from: Arugula (Mar 17), Beets (Mar 17), Dill (Mar 17), Peas (Mar 17), Radish (Mar 17), Spinach (Mar 17), +1 more. |
| April | Start indoors: Basil (Apr 7), Tomato (Apr 7), Bok Choy (Apr 14), Corn (Apr 14), Cosmos (Apr 14), Nasturtiums (Apr 14), +11 more. Direct sow from: Cilantro (Apr 14), Turnip (Apr 14), Carrots (Apr 21), Potatoes (Apr 28). Transplant from: Broccoli (Apr 14), Brussel Sprouts (Apr 14), Cabbage (Apr 14), Collards (Apr 14), Kale (Apr 14), Lettuce (Apr 14), +4 more. Plant: Strawberry (Apr 7). |
| May | Direct sow from: Sunflowers (May 12), Beans (May 19), Pole Beans (May 19). Transplant from: Bok Choy (May 5), Cauliflower (May 5), Cosmos (May 12), Lavender (May 12), Marigolds (May 12), Mint (May 12), +24 more. Last frost around May 12. Last sowing dates: Celery (May 22), Tomato (May 27), Watermelon (May 27). |
| June | Transplant from: Basil (Jun 2). Last sowing dates: Pepper (Jun 1), Tomatillos (Jun 1), Eggplant (Jun 6), Corn (Jun 8), Sunflowers (Jun 20), Brussel Sprouts (Jun 25), +5 more. |
| July | Last sowing dates: Broccoli (Jul 1), Nasturtiums (Jul 5), Okra (Jul 5), Yellow Squash (Jul 5), Zucchini (Jul 5), Cauliflower (Jul 6), +11 more. |
| August | Last sowing dates: Collards (Aug 4), Scallions (Aug 4), Bok Choy (Aug 5), Lettuce (Aug 5), Kale (Aug 9), Kohlrabi (Aug 9), +4 more. |
| September | Direct sow from: Garlic (Sep 26). First frost around September 26. |
| October | Last sowing dates: Garlic (Oct 17). |
| November | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
Frequently Asked Questions
What is the last frost date for Cheyenne, WY (ZIP 82001)?
The median last spring frost date for Cheyenne, WY (ZIP code 82001) is around May 12. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area. One year in ten frost ends before April 27; one in ten it runs past May 26.
What is the first fall frost date in Cheyenne, WY?
The median first fall frost date for Cheyenne, WY is around September 26. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses. The first frost arrives around September 14 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Cheyenne, WY?
The frost-free growing season in Cheyenne is about 137 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side. In Cheyenne (137 frost-free days, a moderate season), 39 of 56 planner crops fit outright, 16 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Cheyenne, WY?
Cheyenne, WY is in USDA hardiness zone 5b (2023 USDA Plant Hardiness Zone Map). Zones come from the average coldest winter temperature, so they tell you which perennials survive the winter; the frost dates on this page tell you when to plant.
When should I start tomatoes indoors in Cheyenne, WY?
Start tomatoes indoors Apr 7 and plant out May 26 in Cheyenne. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Cheyenne?
Two: plant Apr 14 and again by Aug 5; both mature before Oct 3.
When do I plant garlic in Cheyenne?
Sep 26 to Oct 17; it overwinters and is ready the following summer.
Which nearby ZIP has a longer season?
Fort Collins (ZIP 80524) has 150 frost-free days, 13 more than Cheyenne (ZIP 82001). See Fort Collins ZIP 80524 frost dates
Nearby and related
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- Frost dates for Cheyenne, WY 82009 (20.4 mi)
- Frost dates for Fort Collins, CO 80524 (31.2 mi)
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- Frost dates for Fort Collins, CO 80525 (39.5 mi)
- When to plant in Cheyenne, WY: month-by-month guide
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- Look up another ZIP