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Will it freeze in Derby in the next 7 nights?
No overnight lows at or below 32°F are forecast in Derby during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 40°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
1 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 40°F Above 36°F · Partly Cloudy
- Fri, Nov 6 36°F Frost possible · Mostly Cloudy
- Sat, Nov 7 38°F Above 36°F · Mostly Clear
- Sun, Nov 8 42°F Above 36°F · Clear
- Mon, Nov 9 46°F Above 36°F · Clear
- Tue, Nov 10 48°F Above 36°F · Mostly Clear
- Wed, Nov 11 47°F Above 36°F · Mostly Clear
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 Derby
The median first fall hard-freeze date (28°F) is October 31, from NOAA’s 1991–2020 Climate Normals at Haysville 3SE. This is the 50% probability date, not a forecast for this year.
| Temperature | Last 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 | Apr 10 · Apr 24 · May 7 | Sep 27 · Oct 12 · Oct 25 | 169 days |
| 32°F freeze | Mar 30 · Apr 14 · Apr 30 | Oct 5 · Oct 22 · Nov 4 | 189 days |
| 28°F hard freeze | Mar 16 · Apr 3 · Apr 19 | Oct 16 · Oct 31 · Nov 15 | 208 days |
Average high temperature by month
1991–2020 normals at Haysville 3SE
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 Derby, KS come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Haysville 3SE (station USC00143545, elevation 1,240 ft), 4.2 mi from Derby. 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 Derby
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Haysville, KS | 5.6 mi | Apr 14 | Oct 22 |
| Mulvane, KS | 5.6 mi | Apr 14 | Oct 22 |
| Wichita, KS | 11 mi | Apr 11 | Oct 29 |
| Andover, KS | 11 mi | Apr 10 | Oct 27 |
| Bel Aire, KS | 15 mi | Apr 10 | Oct 27 |
| Park City, KS | 17 mi | Apr 10 | Oct 27 |
| Goddard, KS | 18 mi | Apr 8 | Oct 27 |
| Augusta, KS | 18 mi | Apr 13 | Oct 25 |
| Maize, KS | 19 mi | Apr 8 | Oct 27 |
| Valley Center, KS | 20 mi | Apr 10 | Oct 27 |
Frequently asked questions
When is the last frost in Derby?
On average, the last spring frost (32°F) in Derby is around April 14. In about 1 year in 10 it comes after April 30, and in 9 years in 10 it comes after March 30.
When is the first frost in Derby?
The first fall frost (32°F) usually arrives around October 22. There’s a 10% chance of a freeze by October 5 and a 90% chance by November 4.
Can it frost in Derby 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 April 24.
What growing zone is Derby?
Derby is in USDA Plant Hardiness Zone 7a (average annual extreme minimum temperature 0 to 5°F), based on the 2023 USDA map for ZIP code 67037. See growing zones in Kansas.
More: all Kansas frost dates · Kansas growing zones · UV index today in Derby · frost vs. freeze