Frost dates for 95321Groveland, CA
The average last spring frost in Groveland is April 22 and the average first fall frost is November 2, giving a typical growing season of about 192 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 22
- Average first fall frost
- Nov 2
- Growing season
- 192 days
Safer after May 14 (1-in-10 risk)
Possible by Oct 13 (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 25 · May 11 · May 30 | Sep 27 · Oct 14 · Nov 2 | 156 days | 100% |
| Frost / freeze (32°F) | Apr 5 · Apr 22 · May 14 | Oct 13 · Nov 2 · Nov 20 | 192 days | 100% |
| Hard freeze (28°F) | Mar 5 · Mar 29 · Apr 22 | Oct 30 · Nov 19 · Dec 7 | 235 days | 100% |
Planting calendar for Groveland
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 22 – May 28 |
| Tomatoes | Transplant outdoors | May 8 – Jul 13 |
| Peppers | Start seeds indoors | Mar 22 – Apr 22 |
| Peppers | Transplant outdoors | May 22 – Jun 22 |
| Eggplant | Start seeds indoors | Apr 8 – May 7 |
| Eggplant | Transplant outdoors | May 22 – Jun 22 |
| Cucumbers | Sow outdoors | May 22 – Jul 23 |
| Summer squash | Sow outdoors | May 8 – Jun 22 |
| Winter squash & pumpkins | Sow outdoors | May 22 – Jun 22 |
| Snap beans | Sow outdoors | May 8 – Aug 15 |
| Sweet corn | Sow outdoors | May 8 – Jul 13 |
| Watermelon & cantaloupe | Sow outdoors | May 22 – Jun 22 |
| Okra | Sow outdoors | May 15 – Jun 7 |
| Peas | Sow outdoors (spring) | Mar 22 – May 7 |
| Potatoes | Plant outdoors (spring) | Mar 22 – May 22 |
| Onions | Start seeds indoors (spring) | Feb 8 – Mar 7 |
| Onions | Transplant outdoors (spring) | Apr 8 – May 7 |
| Broccoli | Start seeds indoors (spring) | Mar 4 – Apr 7 |
| Broccoli | Transplant outdoors (spring) | Apr 8 – May 7 |
| Broccoli | Start seeds indoors (fall) | Jul 3 – Jul 13 |
| Broccoli | Transplant outdoors (fall) | Aug 2 – Aug 13 |
| Cabbage | Start seeds indoors (spring) | Feb 22 – Mar 22 |
| Cabbage | Transplant outdoors (spring) | Mar 22 – Apr 22 |
| Cabbage | Start seeds indoors (fall) | Jun 23 – Jul 23 |
| Cabbage | Transplant outdoors (fall) | Jul 23 – Aug 23 |
| Leaf lettuce | Sow outdoors (spring) | Mar 22 – Jun 7 |
| Leaf lettuce | Sow outdoors (fall) | Jul 23 – Sep 8 |
| Spinach | Sow outdoors (spring) | Mar 15 – Apr 28 |
| Spinach | Sow outdoors (fall) | Aug 9 – Sep 13 |
| Radishes | Sow outdoors (spring) | Mar 22 – May 12 |
| Radishes | Sow outdoors (fall) | Jul 23 – Sep 23 |
| Kale | Sow outdoors (spring) | Apr 8 – Apr 28 |
| Kale | Sow outdoors (fall) | Jul 16 – Aug 23 |
| Carrots | Sow outdoors (spring) | Apr 22 – Jun 7 |
| Carrots | Sow outdoors (fall) | Jun 23 – Aug 8 |
| Garlic | Plant outdoors (fall) | Oct 23 – Nov 23 |
Where these dates come from
ZIP code 95321 is matched to the NOAA station Groveland 2, CA, 10.8 km away, at 2,800 ft elevation (58 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Groveland 2, CA (used) | 2,800 ft | Apr 22 | Nov 2 |
| Cherry Valley Dam, CA | 4,765 ft | May 2 | Nov 4 |
| Yosemite Village 12 W, CA | 6,620 ft | May 12 | Nov 1 |
| Sonora, CA | 1,675 ft | Apr 9 | Nov 9 |
Frost dates near Groveland
- Coulterville, CA 95311 · last Apr 22, first Nov 2
- Big Oak Flat, CA 95305 · last Apr 22, first Nov 2
- Moccasin, CA 95347 · last Feb 20, first Dec 11
- Tuolumne, CA 95379 · last Apr 22, first Nov 2
- Soulsbyville, CA 95372 · last Apr 22, first Nov 2
- Standard, CA 95373 · last Apr 9, first Nov 9
- Twain Harte, CA 95383 · last Apr 16, first Nov 12
- Chinese Camp, CA 95309 · last Feb 20, first Dec 11
Frequently asked questions
- When is the last frost in Groveland, CA?
- For ZIP code 95321, the average last spring frost (32°F) is April 22, based on NOAA 1991-2020 climate normals for the Groveland 2, CA weather station. There is a 1-in-10 chance of a frost after May 14.
- When is the first frost in Groveland, CA?
- The average first fall frost (32°F) is November 2. There is a 1-in-10 chance of frost by October 13, so tender plants are at risk from that point on.
- How long is the growing season in 95321?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 192 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.