Frost dates for 82005Fe Warren Afb, WY
The average last spring frost in Fe Warren Afb is May 12 and the average first fall frost is October 1, giving a typical growing season of about 141 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 12
- Average first fall frost
- Oct 1
- Growing season
- 141 days
Safer after May 26 (1-in-10 risk)
Possible by Sep 18 (1-in-10 risk)
Last frost typically in 197 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | May 12 · May 24 · Jun 8 | Sep 10 · Sep 24 · Oct 5 | 121 days | 100% |
| Frost / freeze (32°F) | May 1 · May 12 · May 26 | Sep 18 · Oct 1 · Oct 14 | 141 days | 100% |
| Hard freeze (28°F) | Apr 19 · May 2 · May 14 | Sep 28 · Oct 11 · Oct 24 | 161 days | 100% |
Planting calendar for Fe Warren Afb
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Apr 11 – Jun 17 |
| Tomatoes | Transplant outdoors | May 28 – Jun 11 |
| Peppers | Start seeds indoors | Apr 11 – May 12 |
| Peppers | Transplant outdoors | Jun 11 – Jul 12 |
| Eggplant | Start seeds indoors | Apr 28 – May 27 |
| Eggplant | Transplant outdoors | Jun 11 – Jul 12 |
| Cucumbers | Sow outdoors | Jun 11 – Jun 21 |
| Summer squash | Sow outdoors | May 28 – Jul 12 |
| Winter squash & pumpkins | Sow outdoors | Jun 11 – Jul 12 |
| Snap beans | Sow outdoors | May 28 – Jul 14 |
| Sweet corn | Sow outdoors | May 28 – Jun 11 |
| Watermelon & cantaloupe | Sow outdoors | Jun 11 – Jul 12 |
| Okra | Sow outdoors | Jun 4 – Jun 27 |
| Peas | Sow outdoors (spring) | Apr 11 – May 27 |
| Potatoes | Plant outdoors (spring) | Apr 11 – Jun 11 |
| Onions | Start seeds indoors (spring) | Feb 28 – Mar 27 |
| Onions | Transplant outdoors (spring) | Apr 28 – May 27 |
| Broccoli | Start seeds indoors (spring) | Mar 24 – Apr 27 |
| Broccoli | Transplant outdoors (spring) | Apr 28 – May 27 |
| Broccoli | Start seeds indoors (fall) | Jun 1 – Jun 11 |
| Broccoli | Transplant outdoors (fall) | Jul 1 – Jul 12 |
| Cabbage | Start seeds indoors (spring) | Mar 14 – Apr 11 |
| Cabbage | Transplant outdoors (spring) | Apr 11 – May 12 |
| Cabbage | Start seeds indoors (fall) | May 22 – Jun 21 |
| Cabbage | Transplant outdoors (fall) | Jun 21 – Jul 22 |
| Leaf lettuce | Sow outdoors (spring) | Apr 11 – Jun 27 |
| Leaf lettuce | Sow outdoors (fall) | Jun 21 – Aug 7 |
| Spinach | Sow outdoors (spring) | Apr 4 – May 18 |
| Spinach | Sow outdoors (fall) | Jul 8 – Aug 12 |
| Radishes | Sow outdoors (spring) | Apr 11 – Jun 1 |
| Radishes | Sow outdoors (fall) | Jun 21 – Aug 22 |
| Kale | Sow outdoors (spring) | Apr 28 – May 18 |
| Kale | Sow outdoors (fall) | Jun 14 – Jul 22 |
| Carrots | Sow outdoors (spring) | May 12 – Jun 27 |
| Carrots | Sow outdoors (fall) | May 22 – Jul 7 |
| Garlic | Plant outdoors (fall) | Sep 21 – Oct 22 |
Where these dates come from
ZIP code 82005 is matched to the NOAA station Cheyenne, WY, 5 km away, at 6,128 ft elevation (24 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Cheyenne, WY (used) | 6,128 ft | May 12 | Oct 1 |
| Cheyenne Wfo, WY | 6,119 ft | May 14 | Oct 1 |
| Archer, WY | 6,010 ft | May 21 | Sep 24 |
| Hecla 1E, WY | 6,690 ft | May 27 | Sep 19 |
Frost dates near Fe Warren Afb
- Cheyenne, WY 82002 · last May 14, first Oct 1
- Granite Canon, WY 82059 · last May 31, first Sep 19
- Carr, CO 80612 · last May 13, first Sep 27
- Hillsdale, WY 82060 · last May 14, first Sep 26
- Buford, WY 82052 · last May 31, first Sep 19
- Horse Creek, WY 82061 · last May 27, first Sep 19
- Burns, WY 82053 · last May 16, first Sep 27
- Nunn, CO 80648 · last May 13, first Sep 27
Frequently asked questions
- When is the last frost in Fe Warren Afb, WY?
- For ZIP code 82005, the average last spring frost (32°F) is May 12, based on NOAA 1991-2020 climate normals for the Cheyenne, WY weather station. There is a 1-in-10 chance of a frost after May 26.
- When is the first frost in Fe Warren Afb, WY?
- The average first fall frost (32°F) is October 1. There is a 1-in-10 chance of frost by September 18, so tender plants are at risk from that point on.
- How long is the growing season in 82005?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 141 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.