Frost dates for 83837Kellogg, ID
The average last spring frost in Kellogg is May 14 and the average first fall frost is September 26, giving a typical growing season of about 131 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 14
- Average first fall frost
- Sep 26
- Growing season
- 131 days
Safer after Jun 3 (1-in-10 risk)
Possible by Sep 9 (1-in-10 risk)
Last frost typically in 193 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 16 · Jun 2 · Jun 24 | Aug 26 · Sep 10 · Sep 26 | 97 days | 100% |
| Frost / freeze (32°F) | Apr 30 · May 14 · Jun 3 | Sep 9 · Sep 26 · Oct 9 | 131 days | 100% |
| Hard freeze (28°F) | Apr 12 · Apr 30 · May 13 | Sep 24 · Oct 8 · Oct 24 | 162 days | 100% |
Planting calendar for Kellogg
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 13 – Jun 19 |
| Tomatoes | Transplant outdoors | May 30 – Jun 6 |
| Peppers | Start seeds indoors | Apr 13 – May 14 |
| Peppers | Transplant outdoors | Jun 13 – Jul 14 |
| Eggplant | Start seeds indoors | Apr 30 – May 29 |
| Eggplant | Transplant outdoors | Jun 13 – Jul 14 |
| Cucumbers | Sow outdoors | Jun 13 – Jun 16 |
| Summer squash | Sow outdoors | May 30 – Jul 14 |
| Winter squash & pumpkins | Sow outdoors | Jun 13 – Jul 14 |
| Snap beans | Sow outdoors | May 30 – Jul 9 |
| Sweet corn | Sow outdoors | May 30 – Jun 6 |
| Watermelon & cantaloupe | Sow outdoors | Jun 13 – Jul 14 |
| Okra | Sow outdoors | Jun 6 – Jun 29 |
| Peas | Sow outdoors (spring) | Apr 13 – May 29 |
| Potatoes | Plant outdoors (spring) | Apr 13 – Jun 13 |
| Onions | Start seeds indoors (spring) | Mar 2 – Mar 29 |
| Onions | Transplant outdoors (spring) | Apr 30 – May 29 |
| Broccoli | Start seeds indoors (spring) | Mar 26 – Apr 29 |
| Broccoli | Transplant outdoors (spring) | Apr 30 – May 29 |
| Broccoli | Start seeds indoors (fall) | May 27 – Jun 6 |
| Broccoli | Transplant outdoors (fall) | Jun 26 – Jul 7 |
| Cabbage | Start seeds indoors (spring) | Mar 16 – Apr 13 |
| Cabbage | Transplant outdoors (spring) | Apr 13 – May 14 |
| Cabbage | Start seeds indoors (fall) | May 17 – Jun 16 |
| Cabbage | Transplant outdoors (fall) | Jun 16 – Jul 17 |
| Leaf lettuce | Sow outdoors (spring) | Apr 13 – Jun 29 |
| Leaf lettuce | Sow outdoors (fall) | Jun 16 – Aug 2 |
| Spinach | Sow outdoors (spring) | Apr 6 – May 20 |
| Spinach | Sow outdoors (fall) | Jul 3 – Aug 7 |
| Radishes | Sow outdoors (spring) | Apr 13 – Jun 3 |
| Radishes | Sow outdoors (fall) | Jun 16 – Aug 17 |
| Kale | Sow outdoors (spring) | Apr 30 – May 20 |
| Kale | Sow outdoors (fall) | Jun 9 – Jul 17 |
| Carrots | Sow outdoors (spring) | May 14 – Jun 29 |
| Carrots | Sow outdoors (fall) | May 17 – Jul 2 |
| Garlic | Plant outdoors (fall) | Sep 16 – Oct 17 |
Where these dates come from
ZIP code 83837 is matched to the NOAA station Kellogg, ID, 1 km away, at 2,377 ft elevation (84 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Kellogg, ID (used) | 2,377 ft | May 14 | Sep 26 |
| Wallace, ID | 2,710 ft | May 5 | Oct 2 |
| Prichard 3 Ese, ID | 2,547 ft | May 31 | Sep 5 |
| Mullan, ID | 3,201 ft | May 12 | Sep 30 |
Frost dates near Kellogg
- Smelterville, ID 83868 · last May 14, first Sep 26
- Osburn, ID 83849 · last May 5, first Oct 2
- Pinehurst, ID 83850 · last May 12, first Sep 30
- Kingston, ID 83839 · last May 14, first Sep 26
- Silverton, ID 83867 · last May 5, first Oct 2
- Wallace, ID 83873 · last May 5, first Oct 2
- Murray, ID 83874 · last May 5, first Oct 2
- Cataldo, ID 83810 · last May 3, first Oct 4
Frequently asked questions
- When is the last frost in Kellogg, ID?
- For ZIP code 83837, the average last spring frost (32°F) is May 14, based on NOAA 1991-2020 climate normals for the Kellogg, ID weather station. There is a 1-in-10 chance of a frost after June 3.
- When is the first frost in Kellogg, ID?
- The average first fall frost (32°F) is September 26. There is a 1-in-10 chance of frost by September 9, so tender plants are at risk from that point on.
- How long is the growing season in 83837?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 131 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.