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Will it freeze in Reading in the next 7 nights?
No overnight lows at or below 32°F are forecast in Reading during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 60°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 60°F Above 36°F · Light Rain Likely then Patchy Fog
- Fri, Nov 6 48°F Above 36°F · Partly Cloudy
- Sat, Nov 7 41°F Above 36°F · Partly Cloudy
- Sun, Nov 8 38°F Above 36°F · Clear
- Mon, Nov 9 36°F Frost possible · Mostly Clear
- Tue, Nov 10 37°F Above 36°F · Mostly Clear
- Wed, Nov 11 34°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 Reading
The median first fall hard-freeze date (28°F) is November 8, from NOAA’s 1991–2020 Climate Normals at Reading Spaatz Field. 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 14 · Apr 28 · May 13 | Oct 4 · Oct 17 · Nov 1 | 172 days |
| 32°F freeze | Apr 1 · Apr 14 · Apr 30 | Oct 13 · Oct 29 · Nov 10 | 197 days |
| 28°F hard freeze | Mar 17 · Apr 1 · Apr 15 | Oct 25 · Nov 8 · Nov 24 | 221 days |
Average high temperature by month
1991–2020 normals at Reading Spaatz Field
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 Reading, PA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Reading Spaatz Field (station USW00014712, elevation 341 ft), 2.9 mi from Reading. 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 Reading
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Wyomissing, PA | 1.9 mi | Apr 14 | Oct 29 |
| Shillington, PA | 3.1 mi | Apr 14 | Oct 29 |
| Birdsboro, PA | 8.1 mi | Apr 16 | Oct 27 |
| Pottstown, PA | 16 mi | Apr 20 | Oct 23 |
| Ephrata, PA | 17 mi | Apr 18 | Oct 25 |
| New Holland, PA | 19 mi | Apr 14 | Nov 1 |
| Lititz, PA | 24 mi | Apr 18 | Oct 25 |
| Schuylkill Haven, PA | 24 mi | Apr 16 | Oct 25 |
| Coatesville, PA | 25 mi | Apr 19 | Oct 25 |
| Phoenixville, PA | 25 mi | Apr 18 | Oct 27 |
Frequently asked questions
When is the last frost in Reading?
On average, the last spring frost (32°F) in Reading is around April 14. In about 1 year in 10 it comes after April 30, and in 9 years in 10 it comes after April 1.
When is the first frost in Reading?
The first fall frost (32°F) usually arrives around October 29. There’s a 10% chance of a freeze by October 13 and a 90% chance by November 10.
Can it frost in Reading 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 28.
What growing zone is Reading?
Reading 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 19602. See growing zones in Pennsylvania.
More: all Pennsylvania frost dates · Pennsylvania growing zones · UV index today in Reading · frost vs. freeze