Frost dates for 04360Vienna, ME
The average last spring frost in Vienna is May 6 and the average first fall frost is October 3, giving a typical growing season of about 148 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 6
- Average first fall frost
- Oct 3
- Growing season
- 148 days
Safer after May 21 (1-in-10 risk)
Possible by Sep 23 (1-in-10 risk)
Last frost typically in 184 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 6 · May 19 · Jun 3 | Sep 11 · Sep 23 · Oct 5 | 126 days | 100% |
| Frost / freeze (32°F) | Apr 24 · May 6 · May 21 | Sep 23 · Oct 3 · Oct 16 | 148 days | 100% |
| Hard freeze (28°F) | Apr 10 · Apr 24 · May 5 | Oct 1 · Oct 14 · Nov 1 | 175 days | 100% |
Planting calendar for Vienna
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 5 – Jun 11 |
| Tomatoes | Transplant outdoors | May 22 – Jun 13 |
| Peppers | Start seeds indoors | Apr 5 – May 6 |
| Peppers | Transplant outdoors | Jun 5 – Jul 6 |
| Eggplant | Start seeds indoors | Apr 22 – May 21 |
| Eggplant | Transplant outdoors | Jun 5 – Jul 6 |
| Cucumbers | Sow outdoors | Jun 5 – Jun 23 |
| Summer squash | Sow outdoors | May 22 – Jul 6 |
| Winter squash & pumpkins | Sow outdoors | Jun 5 – Jul 6 |
| Snap beans | Sow outdoors | May 22 – Jul 16 |
| Sweet corn | Sow outdoors | May 22 – Jun 13 |
| Watermelon & cantaloupe | Sow outdoors | Jun 5 – Jul 6 |
| Okra | Sow outdoors | May 29 – Jun 21 |
| Peas | Sow outdoors (spring) | Apr 5 – May 21 |
| Potatoes | Plant outdoors (spring) | Apr 5 – Jun 5 |
| Onions | Start seeds indoors (spring) | Feb 22 – Mar 21 |
| Onions | Transplant outdoors (spring) | Apr 22 – May 21 |
| Broccoli | Start seeds indoors (spring) | Mar 18 – Apr 21 |
| Broccoli | Transplant outdoors (spring) | Apr 22 – May 21 |
| Broccoli | Start seeds indoors (fall) | Jun 3 – Jun 13 |
| Broccoli | Transplant outdoors (fall) | Jul 3 – Jul 14 |
| Cabbage | Start seeds indoors (spring) | Mar 8 – Apr 5 |
| Cabbage | Transplant outdoors (spring) | Apr 5 – May 6 |
| Cabbage | Start seeds indoors (fall) | May 24 – Jun 23 |
| Cabbage | Transplant outdoors (fall) | Jun 23 – Jul 24 |
| Leaf lettuce | Sow outdoors (spring) | Apr 5 – Jun 21 |
| Leaf lettuce | Sow outdoors (fall) | Jun 23 – Aug 9 |
| Spinach | Sow outdoors (spring) | Mar 29 – May 12 |
| Spinach | Sow outdoors (fall) | Jul 10 – Aug 14 |
| Radishes | Sow outdoors (spring) | Apr 5 – May 26 |
| Radishes | Sow outdoors (fall) | Jun 23 – Aug 24 |
| Kale | Sow outdoors (spring) | Apr 22 – May 12 |
| Kale | Sow outdoors (fall) | Jun 16 – Jul 24 |
| Carrots | Sow outdoors (spring) | May 6 – Jun 21 |
| Carrots | Sow outdoors (fall) | May 24 – Jul 9 |
| Garlic | Plant outdoors (fall) | Sep 23 – Oct 24 |
Where these dates come from
ZIP code 04360 is matched to the NOAA station Hartford, ME, 31.5 km away, at 705 ft elevation (13 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Hartford, ME (used) | 705 ft | May 6 | Oct 3 |
| New Sharon, ME | 480 ft | May 7 | Oct 2 |
| Livermore Falls 1 E, ME | 380 ft | May 11 | Sep 29 |
| Farmington, ME | 405 ft | May 16 | Sep 26 |
Frost dates near Vienna
- Mount Vernon, ME 04352 · last Apr 27, first Oct 16
- Belgrade Lakes, ME 04918 · last May 2, first Oct 10
- Farmington Falls, ME 04940 · last May 16, first Sep 26
- New Sharon, ME 04955 · last May 16, first Sep 26
- Kents Hill, ME 04349 · last May 6, first Oct 3
- Belgrade, ME 04917 · last Apr 27, first Oct 16
- Readfield, ME 04355 · last Apr 27, first Oct 16
- Farmington, ME 04938 · last May 16, first Sep 26
Frequently asked questions
- When is the last frost in Vienna, ME?
- For ZIP code 04360, the average last spring frost (32°F) is May 6, based on NOAA 1991-2020 climate normals for the Hartford, ME weather station. There is a 1-in-10 chance of a frost after May 21.
- When is the first frost in Vienna, ME?
- The average first fall frost (32°F) is October 3. There is a 1-in-10 chance of frost by September 23, so tender plants are at risk from that point on.
- How long is the growing season in 04360?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 148 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.