Frost dates for 56265Montevideo, MN
The average last spring frost in Montevideo is May 4 and the average first fall frost is October 1, giving a typical growing season of about 149 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 4
- Average first fall frost
- Oct 1
- Growing season
- 149 days
Safer after May 17 (1-in-10 risk)
Possible by Sep 18 (1-in-10 risk)
Last frost typically in 182 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 1 · May 12 · May 27 | Sep 10 · Sep 23 · Oct 5 | 130 days | 100% |
| Frost / freeze (32°F) | Apr 22 · May 4 · May 17 | Sep 18 · Oct 1 · Oct 15 | 149 days | 100% |
| Hard freeze (28°F) | Apr 12 · Apr 26 · May 6 | Sep 26 · Oct 10 · Oct 25 | 167 days | 100% |
Planting calendar for Montevideo
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 3 – Jun 9 |
| Tomatoes | Transplant outdoors | May 20 – Jun 11 |
| Peppers | Start seeds indoors | Apr 3 – May 4 |
| Peppers | Transplant outdoors | Jun 3 – Jul 4 |
| Eggplant | Start seeds indoors | Apr 20 – May 19 |
| Eggplant | Transplant outdoors | Jun 3 – Jul 4 |
| Cucumbers | Sow outdoors | Jun 3 – Jun 21 |
| Summer squash | Sow outdoors | May 20 – Jul 4 |
| Winter squash & pumpkins | Sow outdoors | Jun 3 – Jul 4 |
| Snap beans | Sow outdoors | May 20 – Jul 14 |
| Sweet corn | Sow outdoors | May 20 – Jun 11 |
| Watermelon & cantaloupe | Sow outdoors | Jun 3 – Jul 4 |
| Okra | Sow outdoors | May 27 – Jun 19 |
| Peas | Sow outdoors (spring) | Apr 3 – May 19 |
| Potatoes | Plant outdoors (spring) | Apr 3 – Jun 3 |
| Onions | Start seeds indoors (spring) | Feb 20 – Mar 19 |
| Onions | Transplant outdoors (spring) | Apr 20 – May 19 |
| Broccoli | Start seeds indoors (spring) | Mar 16 – Apr 19 |
| Broccoli | Transplant outdoors (spring) | Apr 20 – May 19 |
| Broccoli | Start seeds indoors (fall) | Jun 1 – Jun 11 |
| Broccoli | Transplant outdoors (fall) | Jul 1 – Jul 12 |
| Cabbage | Start seeds indoors (spring) | Mar 6 – Apr 3 |
| Cabbage | Transplant outdoors (spring) | Apr 3 – May 4 |
| Cabbage | Start seeds indoors (fall) | May 22 – Jun 21 |
| Cabbage | Transplant outdoors (fall) | Jun 21 – Jul 22 |
| Leaf lettuce | Sow outdoors (spring) | Apr 3 – Jun 19 |
| Leaf lettuce | Sow outdoors (fall) | Jun 21 – Aug 7 |
| Spinach | Sow outdoors (spring) | Mar 27 – May 10 |
| Spinach | Sow outdoors (fall) | Jul 8 – Aug 12 |
| Radishes | Sow outdoors (spring) | Apr 3 – May 24 |
| Radishes | Sow outdoors (fall) | Jun 21 – Aug 22 |
| Kale | Sow outdoors (spring) | Apr 20 – May 10 |
| Kale | Sow outdoors (fall) | Jun 14 – Jul 22 |
| Carrots | Sow outdoors (spring) | May 4 – Jun 19 |
| Carrots | Sow outdoors (fall) | May 22 – Jul 7 |
| Garlic | Plant outdoors (fall) | Sep 21 – Oct 22 |
Where these dates come from
ZIP code 56265 is matched to the NOAA station Montevideo 1Sw, MN, 6.7 km away, at 990 ft elevation (17 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Montevideo 1Sw, MN (used) | 990 ft | May 4 | Oct 1 |
| Granite Falls, MN | 930 ft | May 4 | Oct 1 |
| Milan 1Nw, MN | 1,020 ft | May 3 | Oct 2 |
| Madison Wwtp, MN | 1,075 ft | May 3 | Oct 2 |
Frost dates near Montevideo
- Watson, MN 56295 · last May 3, first Oct 2
- Maynard, MN 56260 · last May 4, first Oct 1
- Granite Falls, MN 56241 · last May 4, first Oct 1
- Milan, MN 56262 · last May 3, first Oct 2
- Boyd, MN 56218 · last May 4, first Oct 1
- Clarkfield, MN 56223 · last May 4, first Oct 1
- Clara City, MN 56222 · last Apr 30, first Oct 7
- Dawson, MN 56232 · last May 3, first Oct 2
Frequently asked questions
- When is the last frost in Montevideo, MN?
- For ZIP code 56265, the average last spring frost (32°F) is May 4, based on NOAA 1991-2020 climate normals for the Montevideo 1Sw, MN weather station. There is a 1-in-10 chance of a frost after May 17.
- When is the first frost in Montevideo, MN?
- The average first fall frost (32°F) is October 1. There is a 1-in-10 chance of frost by September 18, so tender plants are at risk from that point on.
- How long is the growing season in 56265?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 149 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.