Frost dates for 95636Grizzly Flats, CA
The average last spring frost in Grizzly Flats is April 26 and the average first fall frost is November 2, giving a typical growing season of about 191 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 26
- Average first fall frost
- Nov 2
- Growing season
- 191 days
Safer after May 19 (1-in-10 risk)
Possible by Oct 14 (1-in-10 risk)
First frost typically in 6 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 29 · May 20 · Jun 9 | Sep 30 · Oct 16 · Nov 4 | 151 days | 100% |
| Frost / freeze (32°F) | Apr 10 · Apr 26 · May 19 | Oct 14 · Nov 2 · Nov 20 | 191 days | 100% |
| Hard freeze (28°F) | Mar 10 · Apr 6 · Apr 24 | Oct 31 · Nov 22 · Dec 11 | 230 days | 100% |
Planting calendar for Grizzly Flats
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 26 – Jun 1 |
| Tomatoes | Transplant outdoors | May 12 – Jul 13 |
| Peppers | Start seeds indoors | Mar 26 – Apr 26 |
| Peppers | Transplant outdoors | May 26 – Jun 26 |
| Eggplant | Start seeds indoors | Apr 12 – May 11 |
| Eggplant | Transplant outdoors | May 26 – Jun 26 |
| Cucumbers | Sow outdoors | May 26 – Jul 23 |
| Summer squash | Sow outdoors | May 12 – Jun 26 |
| Winter squash & pumpkins | Sow outdoors | May 26 – Jun 26 |
| Snap beans | Sow outdoors | May 12 – Aug 15 |
| Sweet corn | Sow outdoors | May 12 – Jul 13 |
| Watermelon & cantaloupe | Sow outdoors | May 26 – Jun 26 |
| Okra | Sow outdoors | May 19 – Jun 11 |
| Peas | Sow outdoors (spring) | Mar 26 – May 11 |
| Potatoes | Plant outdoors (spring) | Mar 26 – May 26 |
| Onions | Start seeds indoors (spring) | Feb 12 – Mar 11 |
| Onions | Transplant outdoors (spring) | Apr 12 – May 11 |
| Broccoli | Start seeds indoors (spring) | Mar 8 – Apr 11 |
| Broccoli | Transplant outdoors (spring) | Apr 12 – May 11 |
| Broccoli | Start seeds indoors (fall) | Jul 3 – Jul 13 |
| Broccoli | Transplant outdoors (fall) | Aug 2 – Aug 13 |
| Cabbage | Start seeds indoors (spring) | Feb 26 – Mar 26 |
| Cabbage | Transplant outdoors (spring) | Mar 26 – Apr 26 |
| Cabbage | Start seeds indoors (fall) | Jun 23 – Jul 23 |
| Cabbage | Transplant outdoors (fall) | Jul 23 – Aug 23 |
| Leaf lettuce | Sow outdoors (spring) | Mar 26 – Jun 11 |
| Leaf lettuce | Sow outdoors (fall) | Jul 23 – Sep 8 |
| Spinach | Sow outdoors (spring) | Mar 19 – May 2 |
| Spinach | Sow outdoors (fall) | Aug 9 – Sep 13 |
| Radishes | Sow outdoors (spring) | Mar 26 – May 16 |
| Radishes | Sow outdoors (fall) | Jul 23 – Sep 23 |
| Kale | Sow outdoors (spring) | Apr 12 – May 2 |
| Kale | Sow outdoors (fall) | Jul 16 – Aug 23 |
| Carrots | Sow outdoors (spring) | Apr 26 – Jun 11 |
| Carrots | Sow outdoors (fall) | Jun 23 – Aug 8 |
| Garlic | Plant outdoors (fall) | Oct 23 – Nov 23 |
Where these dates come from
ZIP code 95636 is matched to the NOAA station Pacific House, CA, 12.2 km away, at 3,450 ft elevation (644 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Pacific House, CA (used) | 3,450 ft | Apr 26 | Nov 2 |
| Placerville, CA | 1,850 ft | Mar 31 | Nov 21 |
| Sutter Hill Cdf, CA | 1,586 ft | Mar 4 | Dec 11 |
| Georgetown Rs, CA | 3,001 ft | Apr 12 | Nov 21 |
Frost dates near Grizzly Flats
- Somerset, CA 95684 · last Apr 26, first Nov 2
- Pollock Pines, CA 95726 · last Apr 12, first Nov 21
- Camino, CA 95709 · last Apr 12, first Nov 21
- Fiddletown, CA 95629 · last Mar 31, first Nov 21
- Volcano, CA 95689 · last Apr 12, first Nov 21
- Mount Aukum, CA 95656 · last Mar 31, first Nov 21
- River Pines, CA 95675 · last Mar 31, first Nov 21
- Pioneer, CA 95666 · last Apr 12, first Nov 21
Frequently asked questions
- When is the last frost in Grizzly Flats, CA?
- For ZIP code 95636, the average last spring frost (32°F) is April 26, based on NOAA 1991-2020 climate normals for the Pacific House, CA weather station. There is a 1-in-10 chance of a frost after May 19.
- When is the first frost in Grizzly Flats, CA?
- The average first fall frost (32°F) is November 2. There is a 1-in-10 chance of frost by October 14, so tender plants are at risk from that point on.
- How long is the growing season in 95636?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 191 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.