Frost dates for 98247Everson, WA
The average last spring frost in Everson is April 18 and the average first fall frost is October 18, giving a typical growing season of about 185 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 18
- Average first fall frost
- Oct 18
- Growing season
- 185 days
Safer after May 5 (1-in-10 risk)
Possible by Sep 28 (1-in-10 risk)
Last frost typically in 174 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) | Apr 23 · May 7 · May 22 | Sep 10 · Sep 29 · Oct 14 | 143 days | 100% |
| Frost / freeze (32°F) | Mar 27 · Apr 18 · May 5 | Sep 28 · Oct 18 · Nov 8 | 185 days | 100% |
| Hard freeze (28°F) | Feb 25 · Mar 18 · Apr 8 | Oct 20 · Nov 7 · Dec 4 | 235 days | 100% |
Planting calendar for Everson
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 | Mar 18 – May 24 |
| Tomatoes | Transplant outdoors | May 4 – Jun 28 |
| Peppers | Start seeds indoors | Mar 18 – Apr 18 |
| Peppers | Transplant outdoors | May 18 – Jun 18 |
| Eggplant | Start seeds indoors | Apr 4 – May 3 |
| Eggplant | Transplant outdoors | May 18 – Jun 18 |
| Cucumbers | Sow outdoors | May 18 – Jul 8 |
| Summer squash | Sow outdoors | May 4 – Jun 18 |
| Winter squash & pumpkins | Sow outdoors | May 18 – Jun 18 |
| Snap beans | Sow outdoors | May 4 – Jul 31 |
| Sweet corn | Sow outdoors | May 4 – Jun 28 |
| Watermelon & cantaloupe | Sow outdoors | May 18 – Jun 18 |
| Okra | Sow outdoors | May 11 – Jun 3 |
| Peas | Sow outdoors (spring) | Mar 18 – May 3 |
| Potatoes | Plant outdoors (spring) | Mar 18 – May 18 |
| Onions | Start seeds indoors (spring) | Feb 4 – Mar 3 |
| Onions | Transplant outdoors (spring) | Apr 4 – May 3 |
| Broccoli | Start seeds indoors (spring) | Feb 28 – Apr 3 |
| Broccoli | Transplant outdoors (spring) | Apr 4 – May 3 |
| Broccoli | Start seeds indoors (fall) | Jun 18 – Jun 28 |
| Broccoli | Transplant outdoors (fall) | Jul 18 – Jul 29 |
| Cabbage | Start seeds indoors (spring) | Feb 18 – Mar 18 |
| Cabbage | Transplant outdoors (spring) | Mar 18 – Apr 18 |
| Cabbage | Start seeds indoors (fall) | Jun 8 – Jul 8 |
| Cabbage | Transplant outdoors (fall) | Jul 8 – Aug 8 |
| Leaf lettuce | Sow outdoors (spring) | Mar 18 – Jun 3 |
| Leaf lettuce | Sow outdoors (fall) | Jul 8 – Aug 24 |
| Spinach | Sow outdoors (spring) | Mar 11 – Apr 24 |
| Spinach | Sow outdoors (fall) | Jul 25 – Aug 29 |
| Radishes | Sow outdoors (spring) | Mar 18 – May 8 |
| Radishes | Sow outdoors (fall) | Jul 8 – Sep 8 |
| Kale | Sow outdoors (spring) | Apr 4 – Apr 24 |
| Kale | Sow outdoors (fall) | Jul 1 – Aug 8 |
| Carrots | Sow outdoors (spring) | Apr 18 – Jun 3 |
| Carrots | Sow outdoors (fall) | Jun 8 – Jul 24 |
| Garlic | Plant outdoors (fall) | Oct 8 – Nov 8 |
Where these dates come from
ZIP code 98247 is matched to the NOAA station Clearbrook, WA, 7 km away, at 64 ft elevation (34 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Clearbrook, WA (used) | 64 ft | Apr 18 | Oct 18 |
| Bellingham Intl Ap, WA | 149 ft | Mar 31 | Oct 30 |
| Bellingham 3 Ssw, WA | 15 ft | Apr 1 | Nov 2 |
| Blaine, WA | 60 ft | Mar 31 | Nov 4 |
Frost dates near Everson
- Nooksack, WA 98276 · last Apr 18, first Oct 18
- Lynden, WA 98264 · last Apr 18, first Oct 18
- Sumas, WA 98295 · last Apr 18, first Oct 18
- Bellingham, WA 98226 · last Mar 31, first Oct 30
- Maple Falls, WA 98266 · last Apr 18, first Oct 18
- Ferndale, WA 98248 · last Mar 31, first Oct 30
- Deming, WA 98244 · last Apr 24, first Oct 29
- Custer, WA 98240 · last Mar 31, first Nov 4
Frequently asked questions
- When is the last frost in Everson, WA?
- For ZIP code 98247, the average last spring frost (32°F) is April 18, based on NOAA 1991-2020 climate normals for the Clearbrook, WA weather station. There is a 1-in-10 chance of a frost after May 5.
- When is the first frost in Everson, WA?
- The average first fall frost (32°F) is October 18. There is a 1-in-10 chance of frost by September 28, so tender plants are at risk from that point on.
- How long is the growing season in 98247?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 185 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.