Frost dates for 89023Mercury, NV
The average last spring frost in Mercury is March 10 and the average first fall frost is November 19, giving a typical growing season of about 253 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 10
- Average first fall frost
- Nov 19
- Growing season
- 253 days
Safer after Apr 8 (1-in-10 risk)
Possible by Nov 1 (1-in-10 risk)
First frost typically in 25 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) | Mar 11 · Apr 4 · Apr 22 | Oct 21 · Nov 8 · Nov 21 | 215 days | 100% |
| Frost / freeze (32°F) | Feb 17 · Mar 10 · Apr 8 | Nov 1 · Nov 19 · Dec 2 | 253 days | 100% |
| Hard freeze (28°F) | Jan 21 · Feb 17 · Mar 9 | Nov 14 · Nov 30 · Dec 18 | 288 days | 100% |
Planting calendar for Mercury
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 | Feb 7 – Apr 15 |
| Tomatoes | Transplant outdoors | Mar 26 – Jul 30 |
| Peppers | Start seeds indoors | Feb 7 – Mar 10 |
| Peppers | Transplant outdoors | Apr 9 – May 10 |
| Eggplant | Start seeds indoors | Feb 24 – Mar 25 |
| Eggplant | Transplant outdoors | Apr 9 – May 10 |
| Cucumbers | Sow outdoors | Apr 9 – Aug 9 |
| Summer squash | Sow outdoors | Mar 26 – May 10 |
| Winter squash & pumpkins | Sow outdoors | Apr 9 – May 10 |
| Snap beans | Sow outdoors | Mar 26 – Sep 1 |
| Sweet corn | Sow outdoors | Mar 26 – Jul 30 |
| Watermelon & cantaloupe | Sow outdoors | Apr 9 – May 10 |
| Okra | Sow outdoors | Apr 2 – Apr 25 |
| Peas | Sow outdoors (spring) | Feb 7 – Mar 25 |
| Potatoes | Plant outdoors (spring) | Feb 7 – Apr 9 |
| Onions | Start seeds indoors (spring) | Dec 27 – Jan 23 |
| Onions | Transplant outdoors (spring) | Feb 24 – Mar 25 |
| Broccoli | Start seeds indoors (spring) | Jan 20 – Feb 23 |
| Broccoli | Transplant outdoors (spring) | Feb 24 – Mar 25 |
| Broccoli | Start seeds indoors (fall) | Jul 20 – Jul 30 |
| Broccoli | Transplant outdoors (fall) | Aug 19 – Aug 30 |
| Cabbage | Start seeds indoors (spring) | Jan 10 – Feb 7 |
| Cabbage | Transplant outdoors (spring) | Feb 7 – Mar 10 |
| Cabbage | Start seeds indoors (fall) | Jul 10 – Aug 9 |
| Cabbage | Transplant outdoors (fall) | Aug 9 – Sep 9 |
| Leaf lettuce | Sow outdoors (spring) | Feb 7 – Apr 25 |
| Leaf lettuce | Sow outdoors (fall) | Aug 9 – Sep 25 |
| Spinach | Sow outdoors (spring) | Jan 31 – Mar 16 |
| Spinach | Sow outdoors (fall) | Aug 26 – Sep 30 |
| Radishes | Sow outdoors (spring) | Feb 7 – Mar 30 |
| Radishes | Sow outdoors (fall) | Aug 9 – Oct 10 |
| Kale | Sow outdoors (spring) | Feb 24 – Mar 16 |
| Kale | Sow outdoors (fall) | Aug 2 – Sep 9 |
| Carrots | Sow outdoors (spring) | Mar 10 – Apr 25 |
| Carrots | Sow outdoors (fall) | Jul 10 – Aug 25 |
| Garlic | Plant outdoors (fall) | Nov 9 – Dec 10 |
Where these dates come from
ZIP code 89023 is matched to the NOAA station Mercury 3 Ssw, NV, 4.8 km away, at 3,284 ft elevation (505 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Mercury 3 Ssw, NV (used) | 3,284 ft | Mar 10 | Nov 19 |
| Mercury Desert Rock Ap, NV | 3,230 ft | Mar 16 | Nov 17 |
| Amargosa Farms-Garey, NV | 2,450 ft | Mar 15 | Nov 13 |
| Pahrump 4 Nw, NV | 2,573 ft | Mar 29 | Nov 3 |
Frost dates near Mercury
- Indian Springs, NV 89018 · last Mar 16, first Nov 17
- Pahrump, NV 89060 · last Mar 29, first Nov 3
- Amargosa Valley, NV 89020 · last Mar 15, first Nov 13
- Las Vegas, NV 89124 · last Mar 13, first Nov 15
- Beatty, NV 89003 · last Apr 12, first Nov 3
- Shoshone, CA 92384 · last Mar 29, first Nov 3
- North Las Vegas, NV 89085 · last Jan 24, first Dec 10
- Death Valley, CA 92328 · last Jan 1, first Dec 19
Frequently asked questions
- When is the last frost in Mercury, NV?
- For ZIP code 89023, the average last spring frost (32°F) is March 10, based on NOAA 1991-2020 climate normals for the Mercury 3 Ssw, NV weather station. There is a 1-in-10 chance of a frost after April 8.
- When is the first frost in Mercury, NV?
- The average first fall frost (32°F) is November 19. There is a 1-in-10 chance of frost by November 1, so tender plants are at risk from that point on.
- How long is the growing season in 89023?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 253 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.