Frost Dates for Sheridan, WY 82801
Last spring frost May 28 · First fall frost September 13 · 108 frost-free days · USDA Zone 5a
ZIP 82801 has about 26,300 people.
Short season: 108 frost-free days. Spring frost risk spans May 6–June 18 (43 days). Fall frost risk spans August 30–September 28 (29 days).
Frost probability for 82801
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | June 18 | May 28 | May 6 |
| Fall (first frost) | August 30 | September 13 | September 28 |
Dates come from NOAA 1971–2000 freeze probabilities at SHERIDAN FLD STN (4.3 km away); the 50% date is the median year.
Which crops fit a 108-day season in Sheridan
In Sheridan (108 frost-free days, a short season), 29 of 56 planner crops fit outright, 15 get two plantings, 9 need an indoor start, 2 don't reliably mature, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Apr 23 | Jun 11–Jun 18 | 66 | head-start: Even planted out Jun 11, the outdoor season is about 14 days short; choose an early variety or grow under cover. | — |
| Pepper | Apr 16 | Jun 11–Jun 18 | 66 | head-start: Even planted out Jun 11, the outdoor season is about 9 days short; choose an early variety or grow under cover. | — |
| Lettuce | Apr 2 | Apr 30–May 7 | 143 | two-plantings: Plant Apr 30 and again by Jul 23; both mature before Sep 20. | Jul 23 |
| Carrots | — | May 7–May 14 | 150 | fits: 70 days to maturity, 150 available after May 7. | Jul 12 |
| Cucumber | May 7 | Jun 11–Jun 18 | 80 | fits: 60 days to maturity, 80 available after Jun 11. | Jun 17 |
| Beans | — | Jun 4–Jun 18 | 94 | fits: 60 days to maturity, 94 available after Jun 4. | Jun 24 |
| Peas | — | Apr 2–Jun 11 | 171 | fits: 65 days to maturity, 171 available after Apr 2. | Jul 3 |
| Zucchini | May 14 | Jun 11–Jun 18 | 80 | fits: 55 days to maturity, 80 available after Jun 11. | Jun 22 |
| Onion | Mar 5 | Apr 30–May 14 | 143 | fits: 100 days to maturity, 143 available after Apr 30. | — |
| Spinach | — | Apr 2–May 21 | 185 | two-plantings: Plant Apr 2 and again by Aug 11; both mature before Oct 4. | Aug 11 |
| Kale | Mar 19 | Apr 30–May 14 | 157 | two-plantings: Plant Apr 30 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Broccoli | Apr 2 | Apr 30–May 14 | 143 | fits: 80 days to maturity, 143 available after Apr 30. | Jun 18 |
| Cabbage | Apr 2 | Apr 30–May 14 | 157 | fits: 70 days to maturity, 157 available after Apr 30. | Jul 12 |
| Radish | — | Apr 2–Jun 25 | 171 | two-plantings: Plant Apr 2 and again by Aug 12; both mature before Sep 20. | Aug 12 |
| Beets | — | Apr 2–Jun 25 | 171 | two-plantings: Plant Apr 2 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Potatoes | — | May 14–May 21 | 129 | fits: 90 days to maturity, 129 available after May 14. | — |
| Garlic | — | Sep 13 | 213 | overwinter: Plant Sep 13 to Oct 4; harvest the following summer. | Oct 4 |
| Strawberry | — | Apr 23–Jun 18 | 164 | perennial: A perennial: plant Apr 23; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 30 | Jun 4–Jun 11 | 80 | fits: 75 days to maturity, 80 available after Jun 4. | — |
| Pumpkin | May 14 | Jun 11–Jun 11 | 73 | no-fit: Needs 100 days; Sheridan has 73 after Jun 11. | — |
| Cauliflower | Apr 16 | May 21–Jun 4 | 122 | fits: 75 days to maturity, 122 available after May 21. | Jun 23 |
| Swiss Chard | Apr 2 | May 14–May 14 | 129 | two-plantings: Plant May 14 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Arugula | — | Apr 2–Jun 25 | 185 | two-plantings: Plant Apr 2 and again by Aug 11; both mature before Oct 4. | Aug 11 |
| Brussel Sprouts | Apr 2 | Apr 30–May 14 | 157 | fits: 100 days to maturity, 157 available after Apr 30. | Jun 12 |
| Butternut Squash | May 14 | Jun 11–Jun 18 | 73 | no-fit: Needs 100 days; Sheridan has 73 after Jun 11. | — |
| Eggplant | Apr 9 | Jun 11–Jun 18 | 66 | head-start: Even planted out Jun 11, the outdoor season is about 4 days short; choose an early variety or grow under cover. | — |
| Okra | Apr 30 | Jun 4–Jun 11 | 87 | fits: 55 days to maturity, 87 available after Jun 4. | Jun 22 |
| Basil | Apr 23 | Jun 18–Jun 18 | 73 | fits: 60 days to maturity, 73 available after Jun 18. | — |
| Cilantro | — | Apr 30–May 21 | 143 | two-plantings: Plant Apr 30 and again by Jul 18; both mature before Sep 20. | Jul 18 |
| Parsley | Mar 19 | Jun 4–Jun 11 | 108 | fits: 70 days to maturity, 108 available after Jun 4. | Jun 28 |
| Celery | Mar 19 | Jun 4–Jun 18 | 108 | head-start: Even planted out Jun 4, the outdoor season is about 12 days short; choose an early variety or grow under cover. | — |
| Scallions | Mar 19 | Apr 30–May 14 | 157 | two-plantings: Plant Apr 30 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Turnip | — | Apr 30–May 14 | 157 | two-plantings: Plant Apr 30 and again by Aug 1; both mature before Oct 4. | Aug 1 |
| Kohlrabi | — | Apr 16–Apr 30 | 171 | two-plantings: Plant Apr 16 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Bok Choy | Apr 30 | May 21–May 28 | 122 | two-plantings: Plant May 21 and again by Jul 23; both mature before Sep 20. | Jul 23 |
| Collards | Mar 19 | Apr 30–May 14 | 157 | two-plantings: Plant Apr 30 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Cantaloupe | May 14 | Jun 11–Jun 18 | 66 | head-start: Even planted out Jun 11, the outdoor season is about 19 days short; choose an early variety or grow under cover. | — |
| Chives | Mar 5 | Jun 4–Jun 11 | 122 | fits: 90 days to maturity, 122 available after Jun 4. | — |
| Dill | — | Apr 2–Jun 25 | 171 | two-plantings: Plant Apr 2 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Oregano | Mar 19 | Jun 4–Jun 11 | 122 | fits: 80 days to maturity, 122 available after Jun 4. | — |
| Rosemary | Mar 5 | Jun 4–Jun 11 | 108 | fits: 80 days to maturity, 108 available after Jun 4. | — |
| Sage | Apr 2 | Jun 4–Jun 11 | 122 | fits: 75 days to maturity, 122 available after Jun 4. | — |
| Thyme | Mar 19 | Jun 4–Jun 11 | 122 | fits: 90 days to maturity, 122 available after Jun 4. | — |
| Calendula | Apr 16 | May 14–May 28 | 129 | two-plantings: Plant May 14 and again by Jul 18; both mature before Sep 20. | Jul 18 |
| Cosmos | Apr 30 | May 28–Jun 11 | 94 | fits: 60 days to maturity, 94 available after May 28. | Jun 17 |
| Lavender | Mar 5 | May 28–Jun 11 | 129 | fits: 90 days to maturity, 129 available after May 28. | — |
| Marigolds | Apr 16 | May 28–Jun 4 | 94 | fits: 50 days to maturity, 94 available after May 28. | Jun 27 |
| Melons | May 14 | Jun 11–Jun 18 | 66 | head-start: Even planted out Jun 11, the outdoor season is about 19 days short; choose an early variety or grow under cover. | — |
| Mint | — | May 28–Jun 11 | 129 | fits: 90 days to maturity, 129 available after May 28. | — |
| Nasturtiums | Apr 30 | May 28–Jun 4 | 94 | fits: 55 days to maturity, 94 available after May 28. | Jun 22 |
| Pole Beans | — | Jun 4–Jun 18 | 87 | fits: 65 days to maturity, 87 available after Jun 4. | Jun 12 |
| Spaghetti Squash | May 14 | Jun 11–Jun 18 | 73 | head-start: Even planted out Jun 11, the outdoor season is about 17 days short; choose an early variety or grow under cover. | — |
| Sunflowers | — | May 28–Jun 11 | 94 | fits: 70 days to maturity, 94 available after May 28. | Jun 7 |
| Tomatillos | Apr 2 | Jun 4–Jun 11 | 73 | head-start: Even planted out Jun 4, the outdoor season is about 2 days short; choose an early variety or grow under cover. | — |
| Watermelon | May 14 | Jun 4–Jun 11 | 73 | head-start: Even planted out Jun 4, the outdoor season is about 7 days short; choose an early variety or grow under cover. | — |
| Yellow Squash | May 14 | Jun 11–Jun 18 | 80 | fits: 55 days to maturity, 80 available after Jun 11. | Jun 22 |
| Zinnias | Apr 30 | May 28–Jun 11 | 94 | fits: 60 days to maturity, 94 available after May 28. | Jun 17 |
Month by month in Sheridan
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start the slowest-growing crops indoors: onions, leeks, and celery (10–12 weeks before last frost). |
| March | Start indoors: Chives (Mar 5), Lavender (Mar 5), Onion (Mar 5), Rosemary (Mar 5), Celery (Mar 19), Collards (Mar 19), +5 more. |
| April | Start indoors: Broccoli (Apr 2), Brussel Sprouts (Apr 2), Cabbage (Apr 2), Lettuce (Apr 2), Sage (Apr 2), Swiss Chard (Apr 2), +14 more. Direct sow from: Arugula (Apr 2), Beets (Apr 2), Dill (Apr 2), Peas (Apr 2), Radish (Apr 2), Spinach (Apr 2), +3 more. Transplant from: Broccoli (Apr 30), Brussel Sprouts (Apr 30), Cabbage (Apr 30), Collards (Apr 30), Kale (Apr 30), Lettuce (Apr 30), +2 more. Plant: Strawberry (Apr 23). |
| May | Start indoors: Cucumber (May 7), Butternut Squash (May 14), Cantaloupe (May 14), Melons (May 14), Pumpkin (May 14), Spaghetti Squash (May 14), +3 more. Direct sow from: Carrots (May 7), Potatoes (May 14), Sunflowers (May 28). Transplant from: Calendula (May 14), Swiss Chard (May 14), Bok Choy (May 21), Cauliflower (May 21), Cosmos (May 28), Lavender (May 28), +4 more. Last frost around May 28. |
| June | Direct sow from: Beans (Jun 4), Pole Beans (Jun 4). Transplant from: Celery (Jun 4), Chives (Jun 4), Corn (Jun 4), Okra (Jun 4), Oregano (Jun 4), Parsley (Jun 4), +17 more. Last sowing dates: Sunflowers (Jun 7), Brussel Sprouts (Jun 12), Pole Beans (Jun 12), Cosmos (Jun 17), Cucumber (Jun 17), Zinnias (Jun 17), +9 more. |
| July | Last sowing dates: Peas (Jul 3), Cabbage (Jul 12), Carrots (Jul 12), Beets (Jul 13), Dill (Jul 13), Swiss Chard (Jul 13), +8 more. |
| August | Last sowing dates: Turnip (Aug 1), Arugula (Aug 11), Spinach (Aug 11), Radish (Aug 12). |
| September | Direct sow from: Garlic (Sep 13). First frost around September 13. |
| October | Last sowing dates: Garlic (Oct 4). |
| 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 Sheridan, WY (ZIP 82801)?
The median last spring frost date for Sheridan, WY (ZIP code 82801) is around May 28. 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 May 6; one in ten it runs past June 18.
What is the first fall frost date in Sheridan, WY?
The median first fall frost date for Sheridan, WY is around September 13. 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 August 30 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Sheridan, WY?
The frost-free growing season in Sheridan is about 108 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 Sheridan (108 frost-free days, a short season), 29 of 56 planner crops fit outright, 15 get two plantings, 9 need an indoor start, 2 don't reliably mature, 1 crop is perennial.
What USDA hardiness zone is Sheridan, WY?
Sheridan, WY is in USDA hardiness zone 5a (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 Sheridan, WY?
Start tomatoes indoors Apr 23 and plant out Jun 11 in Sheridan. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Sheridan?
Two: plant Apr 30 and again by Jul 23; both mature before Sep 20.
When do I plant garlic in Sheridan?
Sep 13 to Oct 4; it overwinters and is ready the following summer.
Can I grow Celery in Sheridan?
Yes, with help. Even planted out Jun 4, the outdoor season is about 12 days short; choose an early variety or grow under cover.
Which nearby ZIP has a longer season?
Gillette (ZIP 82718) has 119 frost-free days, 11 more than Sheridan (ZIP 82801). See Gillette ZIP 82718 frost dates
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- When to plant in WY
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