Frost dates for 89830Montello, NV
The average last spring frost in Montello is June 1 and the average first fall frost is September 12, giving a typical growing season of about 100 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 1
- Average first fall frost
- Sep 12
- Growing season
- 100 days
Safer after Jun 20 (1-in-10 risk)
Possible by Aug 27 (1-in-10 risk)
Last frost typically in 218 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) | — | — | 74 days | 100% |
| Frost / freeze (32°F) | May 12 · Jun 1 · Jun 20 | Aug 27 · Sep 12 · Sep 25 | 100 days | 100% |
| Hard freeze (28°F) | Apr 30 · May 15 · Jun 5 | Sep 5 · Sep 21 · Oct 6 | 127 days | 100% |
Planting calendar for Montello
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 | May 1 – Jul 7 |
| Tomatoes | Transplant outdoors | Jun 17 – May 23 |
| Peppers | Start seeds indoors | May 1 – Jun 1 |
| Peppers | Transplant outdoors | Jul 1 – Aug 1 |
| Eggplant | Start seeds indoors | May 18 – Jun 16 |
| Eggplant | Transplant outdoors | Jul 1 – Aug 1 |
| Cucumbers | Sow outdoors | Jul 1 – Jun 2 |
| Summer squash | Sow outdoors | Jun 17 – Aug 1 |
| Winter squash & pumpkins | Sow outdoors | Jul 1 – Aug 1 |
| Snap beans | Sow outdoors | Jun 17 – Jun 25 |
| Sweet corn | Sow outdoors | Jun 17 – May 23 |
| Watermelon & cantaloupe | Sow outdoors | Jul 1 – Aug 1 |
| Okra | Sow outdoors | Jun 24 – Jul 17 |
| Peas | Sow outdoors (spring) | May 1 – Jun 16 |
| Potatoes | Plant outdoors (spring) | May 1 – Jul 1 |
| Onions | Start seeds indoors (spring) | Mar 20 – Apr 16 |
| Onions | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (spring) | Apr 13 – May 17 |
| Broccoli | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (fall) | May 13 – May 23 |
| Broccoli | Transplant outdoors (fall) | Jun 12 – Jun 23 |
| Cabbage | Start seeds indoors (spring) | Apr 3 – May 1 |
| Cabbage | Transplant outdoors (spring) | May 1 – Jun 1 |
| Cabbage | Start seeds indoors (fall) | May 3 – Jun 2 |
| Cabbage | Transplant outdoors (fall) | Jun 2 – Jul 3 |
| Leaf lettuce | Sow outdoors (spring) | May 1 – Jul 17 |
| Leaf lettuce | Sow outdoors (fall) | Jun 2 – Jul 19 |
| Spinach | Sow outdoors (spring) | Apr 24 – Jun 7 |
| Spinach | Sow outdoors (fall) | Jun 19 – Jul 24 |
| Radishes | Sow outdoors (spring) | May 1 – Jun 21 |
| Radishes | Sow outdoors (fall) | Jun 2 – Aug 3 |
| Kale | Sow outdoors (spring) | May 18 – Jun 7 |
| Kale | Sow outdoors (fall) | May 26 – Jul 3 |
| Carrots | Sow outdoors (spring) | Jun 1 – Jul 17 |
| Carrots | Sow outdoors (fall) | May 3 – Jun 18 |
| Garlic | Plant outdoors (fall) | Sep 2 – Oct 3 |
Where these dates come from
ZIP code 89830 is matched to the NOAA station Montello 2Ne, NV, 2.7 km away, at 4,830 ft elevation (49 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Montello 2Ne, NV (used) | 4,830 ft | Jun 1 | Sep 12 |
| Montello - 7Ne, NV | 4,828 ft | Jun 3 | Sep 18 |
| Wendover 16Nw, NV | 4,828 ft | May 12 | Sep 30 |
| Oasis, NV | 5,835 ft | Jun 12 | Sep 11 |
Frost dates near Montello
- Grouse Creek, UT 84313 · last Jun 4, first Sep 17
- West Wendover, NV 89883 · last Apr 18, first Oct 23
- Wendover, UT 84083 · last Apr 18, first Oct 23
- Wells, NV 89835 · last Jun 10, first Sep 16
- Jackpot, NV 89825 · last —, first —
- Deeth, NV 89823 · last —, first —
- Park Valley, UT 84329 · last May 21, first Oct 2
- Almo, ID 83312 · last Jun 4, first Sep 17
Frequently asked questions
- When is the last frost in Montello, NV?
- For ZIP code 89830, the average last spring frost (32°F) is June 1, based on NOAA 1991-2020 climate normals for the Montello 2Ne, NV weather station. There is a 1-in-10 chance of a frost after June 20.
- When is the first frost in Montello, NV?
- The average first fall frost (32°F) is September 12. There is a 1-in-10 chance of frost by August 27, so tender plants are at risk from that point on.
- How long is the growing season in 89830?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 100 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.