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Will it freeze in Souderton in the next 7 nights?
No overnight lows at or below 32°F are forecast in Souderton during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 59°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
2 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 59°F Above 36°F · Light Rain Likely
- Fri, Nov 6 47°F Above 36°F · Partly Cloudy
- Sat, Nov 7 41°F Above 36°F · Partly Cloudy
- Sun, Nov 8 37°F Above 36°F · Mostly Clear
- Mon, Nov 9 36°F Frost possible · Mostly Clear
- Tue, Nov 10 37°F Above 36°F · Mostly Clear
- Wed, Nov 11 33°F Frost possible · Partly Cloudy
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 Souderton
The median first fall hard-freeze date (28°F) is October 28, from NOAA’s 1991–2020 Climate Normals at Sellersville. 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 23 · May 6 · May 23 | Sep 28 · Oct 7 · Oct 22 | 154 days |
| 32°F freeze | Apr 12 · Apr 26 · May 12 | Oct 5 · Oct 17 · Nov 1 | 175 days |
| 28°F hard freeze | Mar 30 · Apr 13 · Apr 30 | Oct 13 · Oct 28 · Nov 10 | 198 days |
Average high temperature by month
1991–2020 normals at Sellersville
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 Souderton, PA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Sellersville (station USC00367938, elevation 302 ft), 3.1 mi from Souderton. 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 Souderton
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Perkasie, PA | 4.3 mi | Apr 26 | Oct 17 |
| Lansdale, PA | 5.0 mi | Apr 11 | Nov 1 |
| Quakertown, PA | 8.7 mi | Apr 26 | Oct 17 |
| Doylestown, PA | 11 mi | Apr 13 | Oct 30 |
| Collegeville, PA | 11 mi | Apr 24 | Oct 15 |
| Ambler, PA | 12 mi | Apr 11 | Nov 1 |
| Norristown, PA | 13 mi | Apr 8 | Oct 31 |
| Bridgeport, PA | 14 mi | Apr 8 | Oct 31 |
| Hatboro, PA | 15 mi | Apr 11 | Nov 1 |
| Phoenixville, PA | 16 mi | Apr 18 | Oct 27 |
Frequently asked questions
When is the last frost in Souderton?
On average, the last spring frost (32°F) in Souderton is around April 26. In about 1 year in 10 it comes after May 12, and in 9 years in 10 it comes after April 12.
When is the first frost in Souderton?
The first fall frost (32°F) usually arrives around October 17. There’s a 10% chance of a freeze by October 5 and a 90% chance by November 1.
Can it frost in Souderton 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 6.
What growing zone is Souderton?
Souderton 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 18964. See growing zones in Pennsylvania.
More: all Pennsylvania frost dates · Pennsylvania growing zones · frost vs. freeze