Frost dates for 83842Medimont, ID
The average last spring frost in Medimont is May 3 and the average first fall frost is October 4, giving a typical growing season of about 152 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 3
- Average first fall frost
- Oct 4
- Growing season
- 152 days
Safer after May 18 (1-in-10 risk)
Possible by Sep 18 (1-in-10 risk)
Last frost typically in 182 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 5 · May 20 · Jun 7 | Sep 5 · Sep 20 · Oct 4 | 119 days | 100% |
| Frost / freeze (32°F) | Apr 20 · May 3 · May 18 | Sep 18 · Oct 4 · Oct 20 | 152 days | 100% |
| Hard freeze (28°F) | Mar 26 · Apr 14 · May 2 | Oct 2 · Oct 19 · Nov 6 | 188 days | 100% |
Planting calendar for Medimont
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 2 – Jun 8 |
| Tomatoes | Transplant outdoors | May 19 – Jun 14 |
| Peppers | Start seeds indoors | Apr 2 – May 3 |
| Peppers | Transplant outdoors | Jun 2 – Jul 3 |
| Eggplant | Start seeds indoors | Apr 19 – May 18 |
| Eggplant | Transplant outdoors | Jun 2 – Jul 3 |
| Cucumbers | Sow outdoors | Jun 2 – Jun 24 |
| Summer squash | Sow outdoors | May 19 – Jul 3 |
| Winter squash & pumpkins | Sow outdoors | Jun 2 – Jul 3 |
| Snap beans | Sow outdoors | May 19 – Jul 17 |
| Sweet corn | Sow outdoors | May 19 – Jun 14 |
| Watermelon & cantaloupe | Sow outdoors | Jun 2 – Jul 3 |
| Okra | Sow outdoors | May 26 – Jun 18 |
| Peas | Sow outdoors (spring) | Apr 2 – May 18 |
| Potatoes | Plant outdoors (spring) | Apr 2 – Jun 2 |
| Onions | Start seeds indoors (spring) | Feb 19 – Mar 18 |
| Onions | Transplant outdoors (spring) | Apr 19 – May 18 |
| Broccoli | Start seeds indoors (spring) | Mar 15 – Apr 18 |
| Broccoli | Transplant outdoors (spring) | Apr 19 – May 18 |
| Broccoli | Start seeds indoors (fall) | Jun 4 – Jun 14 |
| Broccoli | Transplant outdoors (fall) | Jul 4 – Jul 15 |
| Cabbage | Start seeds indoors (spring) | Mar 5 – Apr 2 |
| Cabbage | Transplant outdoors (spring) | Apr 2 – May 3 |
| Cabbage | Start seeds indoors (fall) | May 25 – Jun 24 |
| Cabbage | Transplant outdoors (fall) | Jun 24 – Jul 25 |
| Leaf lettuce | Sow outdoors (spring) | Apr 2 – Jun 18 |
| Leaf lettuce | Sow outdoors (fall) | Jun 24 – Aug 10 |
| Spinach | Sow outdoors (spring) | Mar 26 – May 9 |
| Spinach | Sow outdoors (fall) | Jul 11 – Aug 15 |
| Radishes | Sow outdoors (spring) | Apr 2 – May 23 |
| Radishes | Sow outdoors (fall) | Jun 24 – Aug 25 |
| Kale | Sow outdoors (spring) | Apr 19 – May 9 |
| Kale | Sow outdoors (fall) | Jun 17 – Jul 25 |
| Carrots | Sow outdoors (spring) | May 3 – Jun 18 |
| Carrots | Sow outdoors (fall) | May 25 – Jul 10 |
| Garlic | Plant outdoors (fall) | Sep 24 – Oct 25 |
Where these dates come from
ZIP code 83842 is matched to the NOAA station Saint Maries, ID, 16.3 km away, at 2,151 ft elevation (579 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Saint Maries, ID (used) | 2,151 ft | May 3 | Oct 4 |
| Coeur D'Alene, ID | 2,133 ft | Apr 22 | Oct 18 |
| Plummer 3 Wsw, ID | 2,905 ft | May 11 | Oct 5 |
| Kellogg, ID | 2,377 ft | May 14 | Sep 26 |
Frost dates near Medimont
- Cataldo, ID 83810 · last May 3, first Oct 4
- Harrison, ID 83833 · last Apr 22, first Oct 18
- Saint Maries, ID 83861 · last May 3, first Oct 4
- Kingston, ID 83839 · last May 14, first Sep 26
- Pinehurst, ID 83850 · last May 12, first Sep 30
- Worley, ID 83876 · last May 11, first Oct 5
- Plummer, ID 83851 · last May 11, first Oct 5
- Smelterville, ID 83868 · last May 14, first Sep 26
Frequently asked questions
- When is the last frost in Medimont, ID?
- For ZIP code 83842, the average last spring frost (32°F) is May 3, based on NOAA 1991-2020 climate normals for the Saint Maries, ID weather station. There is a 1-in-10 chance of a frost after May 18.
- When is the first frost in Medimont, ID?
- The average first fall frost (32°F) is October 4. 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 83842?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 152 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.