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Will it freeze in Porterville in the next 7 nights?
No overnight lows at or below 32°F are forecast in Porterville during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 51°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 51°F Above 36°F · Clear
- Fri, Nov 6 51°F Above 36°F · Mostly Clear
- Sat, Nov 7 53°F Above 36°F · Clear
- Sun, Nov 8 53°F Above 36°F · Mostly Clear
- Mon, Nov 9 52°F Above 36°F · Partly Cloudy
- Tue, Nov 10 53°F Above 36°F · Mostly Clear
- Wed, Nov 11 54°F Above 36°F · Mostly Clear then Slight Chance Light Rain
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 Porterville
Most years have no 28°F hard freeze at Porterville, according to NOAA’s 1991–2020 Climate Normals. Check the short-term forecast above during cold snaps.
| 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 | Jan 25 · Feb 26 · Apr 7 | Nov 10 · Nov 28 · Dec 14 | 273 days |
| 32°F freeze | Dec 25 · Jan 20 · Feb 22 | Nov 26 · Dec 13 · Jan 6 | 330 days |
| 28°F hard freeze | Dec 13 · Dec 31 · Jan 22 | Dec 4 · Dec 23 · Jan 13 | 365 days |
Average high temperature by month
1991–2020 normals at Porterville
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 Porterville, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Porterville (station USC00047077, elevation 393 ft), 0.8 mi from Porterville. 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 Porterville
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Lindsay, CA | 11 mi | Feb 20 | Nov 30 |
| Exeter, CA | 17 mi | Feb 20 | Nov 30 |
| Farmersville, CA | 19 mi | Jan 23 | Dec 13 |
| Tulare, CA | 19 mi | Jan 23 | Dec 13 |
| Delano, CA | 24 mi | Jan 31 | Dec 8 |
| Woodlake, CA | 24 mi | Feb 5 | Dec 8 |
| Visalia, CA | 25 mi | Jan 23 | Dec 13 |
| Corcoran, CA | 29 mi | Feb 15 | Nov 27 |
| McFarland, CA | 30 mi | Jan 31 | Dec 8 |
| Wasco, CA | 37 mi | Jan 31 | Dec 5 |
Frequently asked questions
When is the last frost in Porterville?
On average, the last spring frost (32°F) in Porterville is around January 20. In about 1 year in 10 it comes after February 22, and in 9 years in 10 it comes after December 25.
When is the first frost in Porterville?
The first fall frost (32°F) usually arrives around December 13. There’s a 10% chance of a freeze by November 26 and a 90% chance by January 6.
Can it frost in Porterville 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 February 26.
What growing zone is Porterville?
Porterville is in USDA Plant Hardiness Zone 9b (average annual extreme minimum temperature 25 to 30°F), based on the 2023 USDA map for ZIP code 93267. See growing zones in California.
More: all California frost dates · California growing zones · UV index today in Porterville · frost vs. freeze