Frost dates 2026–2027

Frost dates for Valley City, North Dakota

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Valley City 3 Nnw, 2.4 mi away (close match).

Last spring frostMay 13
First fall frostSep 26
136 frost-free days
Last spring frostMay 131 year in 10 after May 25
First fall frostSep 261 year in 10 by Sep 14
Growing season136 daysbetween median 32°F dates
Hardiness zoneZone 4a−30 to −25°F average extreme low

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Will it freeze in Valley City in the next 7 nights?

The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 24°F (Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST).

Tonight: forecast low 24°F. Hard freeze.

NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.

6 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.

Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.

Frost and freeze probabilities

Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.

These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.

Average first hard freeze in Valley City

The median first fall hard-freeze date (28°F) is October 5, from NOAA’s 1991–2020 Climate Normals at Valley City 3 Nnw. This is the 50% probability date, not a forecast for this year.

TemperatureLast spring date
90% · 50% · 10% chance of a later freeze
First fall date
10% · 50% · 90% chance of an earlier freeze
Season
36°F frost possible May 11 · May 22 · Jun 4 Sep 6 · Sep 17 · Sep 28 116 days
32°F freeze May 2 · May 13 · May 25 Sep 14 · Sep 26 · Oct 8 136 days
28°F hard freeze Apr 21 · May 4 · May 17 Sep 24 · Oct 5 · Oct 20 155 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00328937. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Valley City 3 Nnw

Average low temperature by month

Months with lows near or below freezing carry frost risk

Where these frost dates come from

The frost dates for Valley City, ND come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Valley City 3 Nnw (station USC00328937, elevation 1,210 ft), 2.4 mi from Valley City. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.

Frost dates near Valley City

CityDistanceLast spring frostFirst fall frost
Jamestown, ND 32 mi May 8 Sep 29
West Fargo, ND 52 mi May 4 Oct 2
Horace, ND 53 mi May 4 Oct 2
Fargo, ND 56 mi May 4 Oct 2
Moorhead, MN 60 mi May 5 Oct 3
Wahpeton, ND 80 mi May 4 Oct 3
Grand Forks, ND 81 mi May 10 Oct 1
East Grand Forks, MN 83 mi May 10 Oct 1
Crookston, MN 88 mi May 11 Sep 27
Devils Lake, ND 92 mi May 6 Oct 5

Frequently asked questions

When is the last frost in Valley City?

On average, the last spring frost (32°F) in Valley City is around May 13. In about 1 year in 10 it comes after May 25, and in 9 years in 10 it comes after May 2.

When is the first frost in Valley City?

The first fall frost (32°F) usually arrives around September 26. There’s a 10% chance of a freeze by September 14 and a 90% chance by October 8.

Can it frost in Valley City after the last frost date?

Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after May 22.

What growing zone is Valley City?

Valley City is in USDA Plant Hardiness Zone 4a (average annual extreme minimum temperature −30 to −25°F), based on the 2023 USDA map for ZIP code 58072. See growing zones in North Dakota.

More: all North Dakota frost dates · North Dakota growing zones · frost vs. freeze