USDA Hardiness Zone 4b
Frost Dates for 55356 — Long Lake, Minnesota
NOAA 1991–2020 normals from Chanhassen Wsfo, MN (946 ft), 9 miles south.
Updated
In Long Lake, the last spring frost (32°F) is around April 30 in half of years and has passed by May 15 in nine years out of ten. The first fall frost comes around October 9, as early as September 25 one year in ten, leaving a typical freeze-free season of 160 days (NOAA, Chanhassen Wsfo, MN).
- Last spring frost
- April 30
- First fall frost
- October 9
- Growing season
- 160 days
- Hardiness zone
- 4b
50% probability
50% probability
freeze-free, 50%
-25 to -20°F (-31.7 to -28.9°C) coldest night
- First snow
- November 8
- Last snow
- April 10
- Winters with snow
- 100%
- Snow per year
- 54.7"
median, 1991–2020
median, 1991–2020
24 of 24 observed
NOAA normal
Frost risk by date in Long Lake
Half of springs at Chanhassen Wsfo, MN see their last 32°F night by April 30; only one in ten is past it by April 15, and one in ten still has one after May 15. Planting tender crops after May 6 leaves a 30% risk of a frost on them, after May 9 20%, and after May 15 10%. The 15 days between the even-odds date and the one-in-ten date is wider than at 64% of the 142 Minnesota stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 9 in half of years, as early as September 25 one year in ten, and holds off past October 21 one year in ten. A hard freeze of 28°F follows 10 days later, around October 19; in spring the one-in-ten date for 28°F is May 4, 11 days before the 32°F one. The freeze-free season lasts 160 days in a typical year, longer than at 77% of the 142 Minnesota stations; it reaches 178 days one year in ten and falls short of 140 one year in ten. On average 156 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 9 days longer, to about May 9, and return around September 30. Severe cold of 16°F or below comes every winter, usually between November 14 and March 26.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 27 | May 1 | May 5 | May 7 | May 9 | May 12 | May 15 | May 19 | May 24 |
| 32°F | Apr 15 | Apr 20 | Apr 24 | Apr 27 | Apr 30 | May 2 | May 6 | May 9 | May 15 |
| 28°F | Apr 4 | Apr 9 | Apr 13 | Apr 16 | Apr 19 | Apr 22 | Apr 25 | Apr 29 | May 4 |
| 24°F | Mar 27 | Apr 1 | Apr 4 | Apr 6 | Apr 8 | Apr 11 | Apr 15 | Apr 18 | Apr 23 |
| 20°F | Mar 17 | Mar 22 | Mar 27 | Mar 31 | Apr 2 | Apr 4 | Apr 6 | Apr 9 | Apr 16 |
| 16°F | Mar 10 | Mar 15 | Mar 19 | Mar 22 | Mar 26 | Mar 29 | Apr 1 | Apr 3 | Apr 7 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 17 | Sep 21 | Sep 24 | Sep 27 | Sep 30 | Oct 2 | Oct 4 | Oct 7 | Oct 11 |
| 32°F | Sep 25 | Sep 30 | Oct 3 | Oct 6 | Oct 9 | Oct 12 | Oct 14 | Oct 17 | Oct 21 |
| 28°F | Oct 4 | Oct 10 | Oct 13 | Oct 17 | Oct 19 | Oct 22 | Oct 24 | Oct 27 | Oct 31 |
| 24°F | Oct 14 | Oct 19 | Oct 23 | Oct 26 | Oct 29 | Nov 1 | Nov 3 | Nov 6 | Nov 10 |
| 20°F | Oct 25 | Oct 30 | Nov 1 | Nov 3 | Nov 6 | Nov 9 | Nov 11 | Nov 14 | Nov 20 |
| 16°F | Nov 2 | Nov 5 | Nov 9 | Nov 11 | Nov 14 | Nov 17 | Nov 20 | Nov 24 | Nov 27 |
Freeze probabilities 1991–2020 at Chanhassen Wsfo, MN, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 55356 →Compare Long Lake with another place →
Weather by month in Long Lake
July is the warmest month at Chanhassen Wsfo, MN, averaging 81°F by day and 62°F at night; January is the coldest at 22°F and 6°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 47% of years.
Warmth for growing adds up to 2,566 growing degree days a year (base 50°F), more than at 67% of the 142 Minnesota stations. 33% of them (848) have built up by the end of June, and July adds the most, 674. Precipitation totals 33.0 inches a year, most in August (4.8") and least in January (0.9"); May to September bring 63% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 22 | 6 | 0.9 | 100% | 31 | 0 |
| Feb | 27 | 9 | 0.9 | 100% | 27 | 0 |
| Mar | 40 | 22 | 1.6 | 100% | 25 | 10 |
| Apr | 55 | 35 | 3.2 | 100% | 11 | 60 |
| May | 68 | 47 | 4.4 | 47% | 1 | 253 |
| Jun | 77 | 58 | 4.4 | 0% | 0 | 525 |
| Jul | 81 | 62 | 3.9 | 0% | 0 | 674 |
| Aug | 79 | 60 | 4.8 | 0% | 0 | 601 |
| Sep | 71 | 51 | 3.3 | 21% | <1 | 348 |
| Oct | 57 | 38 | 2.7 | 100% | 8 | 88 |
| Nov | 41 | 25 | 1.7 | 100% | 23 | 8 |
| Dec | 27 | 12 | 1.2 | 100% | 30 | 0 |
Monthly normals 1991–2020 at Chanhassen Wsfo, MN (946 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, New Hope, MN, 10 miles east of Long Lake, has a last frost 1 day earlier (April 29), a first frost 3 days later (October 12), a season 3 days longer.
When it snows in Long Lake, Minnesota
The first measurable snow (0.1 inch or more) in Long Lake usually arrives around November 8, and the last of the season around April 10. Those are the middle dates across the winters of 1991–2020 at Chanhassen Wsfo, MN, 9.4 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 20 days after the last snow.
Planting calendar for 55356
| When | What to do |
|---|---|
| February 19 – March 5 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| March 5 – March 19 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| April 2 – April 16 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 30 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 17 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by September 25 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 9 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 55356 is 9 miles from Chanhassen Wsfo, MN, which stands at 946 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 55317 (Chanhassen). The 2023 USDA Plant Hardiness Zone Map lists ZIP 55356 in zone 4b, the band where the coldest night of the year averaged -25 to -20°F (-31.7 to -28.9°C) over 1991–2020; a zone describes winter lows, not frost dates.
Frost dates across Minnesota →
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.