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Will it freeze in Pacific in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 28°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
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.
3 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 · Slight Chance Drizzle then Cloudy
- Fri, Nov 6 28°F Hard freeze · Mostly Clear
- Sat, Nov 7 29°F Freeze · Mostly Clear
- Sun, Nov 8 32°F Freeze · Clear
- Mon, Nov 9 37°F Above 36°F · Clear
- Tue, Nov 10 37°F Above 36°F · Mostly Clear
- Wed, Nov 11 39°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 Pacific
The median first fall hard-freeze date (28°F) is November 4, from NOAA’s 1991–2020 Climate Normals at Washington. 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 7 · Apr 20 · May 5 | Oct 2 · Oct 16 · Oct 27 | 177 days |
| 32°F freeze | Mar 24 · Apr 8 · Apr 22 | Oct 13 · Oct 25 · Nov 5 | 199 days |
| 28°F hard freeze | Mar 12 · Mar 29 · Apr 11 | Oct 22 · Nov 4 · Nov 21 | 221 days |
Average high temperature by month
1991–2020 normals at Washington
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 Pacific, MO come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Washington (station USC00238746, elevation 487 ft), 13 mi from Pacific. 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 Pacific
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Eureka, MO | 5.6 mi | Apr 12 | Oct 23 |
| Wildwood, MO | 8.1 mi | Apr 12 | Oct 23 |
| Ellisville, MO | 12 mi | Apr 12 | Oct 23 |
| Ballwin, MO | 14 mi | Apr 4 | Oct 29 |
| Union, MO | 14 mi | Apr 11 | Oct 23 |
| Valley Park, MO | 14 mi | Apr 4 | Oct 29 |
| Manchester, MO | 15 mi | Apr 4 | Oct 29 |
| Washington, MO | 15 mi | Apr 8 | Oct 25 |
| Chesterfield, MO | 16 mi | Apr 4 | Oct 29 |
| Weldon Spring, MO | 17 mi | Apr 10 | Oct 26 |
Frequently asked questions
When is the last frost in Pacific?
On average, the last spring frost (32°F) in Pacific is around April 8. In about 1 year in 10 it comes after April 22, and in 9 years in 10 it comes after March 24.
When is the first frost in Pacific?
The first fall frost (32°F) usually arrives around October 25. There’s a 10% chance of a freeze by October 13 and a 90% chance by November 5.
Can it frost in Pacific 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 20.
What growing zone is Pacific?
Pacific is in USDA Plant Hardiness Zone 6b (average annual extreme minimum temperature −5 to 0°F), based on the 2023 USDA map for ZIP code 63069. See growing zones in Missouri.
More: all Missouri frost dates · Missouri growing zones · frost vs. freeze