Frost dates for 95947Greenville, CA
The average last spring frost in Greenville is May 18 and the average first fall frost is October 8, giving a typical growing season of about 143 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 18
- Average first fall frost
- Oct 8
- Growing season
- 143 days
Safer after Jun 9 (1-in-10 risk)
Possible by Sep 24 (1-in-10 risk)
Last frost typically in 203 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 21 · Jun 7 · Jun 23 | Sep 7 · Sep 24 · Oct 9 | 106 days | 100% |
| Frost / freeze (32°F) | Apr 30 · May 18 · Jun 9 | Sep 24 · Oct 8 · Oct 24 | 143 days | 100% |
| Hard freeze (28°F) | Apr 10 · Apr 26 · May 16 | Oct 8 · Oct 26 · Nov 11 | 181 days | 100% |
Planting calendar for Greenville
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 17 – Jun 23 |
| Tomatoes | Transplant outdoors | Jun 3 – Jun 18 |
| Peppers | Start seeds indoors | Apr 17 – May 18 |
| Peppers | Transplant outdoors | Jun 17 – Jul 18 |
| Eggplant | Start seeds indoors | May 4 – Jun 2 |
| Eggplant | Transplant outdoors | Jun 17 – Jul 18 |
| Cucumbers | Sow outdoors | Jun 17 – Jun 28 |
| Summer squash | Sow outdoors | Jun 3 – Jul 18 |
| Winter squash & pumpkins | Sow outdoors | Jun 17 – Jul 18 |
| Snap beans | Sow outdoors | Jun 3 – Jul 21 |
| Sweet corn | Sow outdoors | Jun 3 – Jun 18 |
| Watermelon & cantaloupe | Sow outdoors | Jun 17 – Jul 18 |
| Okra | Sow outdoors | Jun 10 – Jul 3 |
| Peas | Sow outdoors (spring) | Apr 17 – Jun 2 |
| Potatoes | Plant outdoors (spring) | Apr 17 – Jun 17 |
| Onions | Start seeds indoors (spring) | Mar 6 – Apr 2 |
| Onions | Transplant outdoors (spring) | May 4 – Jun 2 |
| Broccoli | Start seeds indoors (spring) | Mar 30 – May 3 |
| Broccoli | Transplant outdoors (spring) | May 4 – Jun 2 |
| Broccoli | Start seeds indoors (fall) | Jun 8 – Jun 18 |
| Broccoli | Transplant outdoors (fall) | Jul 8 – Jul 19 |
| Cabbage | Start seeds indoors (spring) | Mar 20 – Apr 17 |
| Cabbage | Transplant outdoors (spring) | Apr 17 – May 18 |
| Cabbage | Start seeds indoors (fall) | May 29 – Jun 28 |
| Cabbage | Transplant outdoors (fall) | Jun 28 – Jul 29 |
| Leaf lettuce | Sow outdoors (spring) | Apr 17 – Jul 3 |
| Leaf lettuce | Sow outdoors (fall) | Jun 28 – Aug 14 |
| Spinach | Sow outdoors (spring) | Apr 10 – May 24 |
| Spinach | Sow outdoors (fall) | Jul 15 – Aug 19 |
| Radishes | Sow outdoors (spring) | Apr 17 – Jun 7 |
| Radishes | Sow outdoors (fall) | Jun 28 – Aug 29 |
| Kale | Sow outdoors (spring) | May 4 – May 24 |
| Kale | Sow outdoors (fall) | Jun 21 – Jul 29 |
| Carrots | Sow outdoors (spring) | May 18 – Jul 3 |
| Carrots | Sow outdoors (fall) | May 29 – Jul 14 |
| Garlic | Plant outdoors (fall) | Sep 28 – Oct 29 |
Where these dates come from
ZIP code 95947 is matched to the NOAA station Canyon Dam, CA, 15.9 km away, at 4,560 ft elevation (479 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Canyon Dam, CA (used) | 4,560 ft | May 18 | Oct 8 |
| Quincy, CA | 3,420 ft | May 22 | Sep 25 |
| Chester, CA | 4,530 ft | May 28 | Sep 28 |
| Susanville 2Sw, CA | 4,212 ft | May 16 | Oct 8 |
Frost dates near Greenville
- Crescent Mills, CA 95934 · last May 18, first Oct 8
- Westwood, CA 96137 · last May 18, first Oct 8
- Taylorsville, CA 95983 · last May 22, first Sep 25
- Twain, CA 95984 · last May 18, first Oct 8
- Quincy, CA 95971 · last May 22, first Sep 25
- Meadow Valley, CA 95956 · last May 22, first Sep 25
- Chester, CA 96020 · last May 28, first Sep 28
- Susanville, CA 96130 · last May 16, first Oct 8
Frequently asked questions
- When is the last frost in Greenville, CA?
- For ZIP code 95947, the average last spring frost (32°F) is May 18, based on NOAA 1991-2020 climate normals for the Canyon Dam, CA weather station. There is a 1-in-10 chance of a frost after June 9.
- When is the first frost in Greenville, CA?
- The average first fall frost (32°F) is October 8. There is a 1-in-10 chance of frost by September 24, so tender plants are at risk from that point on.
- How long is the growing season in 95947?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 143 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.