Frost dates 2026–2027

Frost dates for Doylestown, Pennsylvania

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Doylestown Airport, 1.1 mi away (close match).

Last spring frostApr 13
First fall frostOct 30
198 frost-free days
Last spring frostApr 131 year in 10 after Apr 27
First fall frostOct 301 year in 10 by Oct 15
Growing season198 daysbetween median 32°F dates
Hardiness zoneZone 7a0 to 5°F average extreme low

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Will it freeze in Doylestown in the next 7 nights?

No overnight lows at or below 32°F are forecast in Doylestown during the next 7 nights in the available NWS frost forecast.

Tonight: forecast low 61°F. Above 36°F.

NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.

1 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.

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 Doylestown

The median first fall hard-freeze date (28°F) is November 10, from NOAA’s 1991–2020 Climate Normals at Doylestown Airport. This is the 50% probability date, not a forecast for this year.

TemperatureLast 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 27 · May 11 Oct 5 · Oct 18 · Nov 1 173 days
32°F freeze Apr 1 · Apr 13 · Apr 27 Oct 15 · Oct 30 · Nov 12 198 days
28°F hard freeze Mar 17 · Apr 2 · Apr 14 Oct 27 · Nov 10 · Nov 25 223 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USW00054786. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Doylestown Airport

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 Doylestown, PA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Doylestown Airport (station USW00054786, elevation 394 ft), 1.1 mi from Doylestown. 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 Doylestown

CityDistanceLast spring frostFirst fall frost
Lansdale, PA 9.3 mi Apr 11 Nov 1
Hatboro, PA 9.3 mi Apr 11 Nov 1
Perkasie, PA 9.3 mi Apr 26 Oct 17
Souderton, PA 11 mi Apr 26 Oct 17
Ambler, PA 12 mi Apr 11 Nov 1
Quakertown, PA 14 mi Apr 26 Oct 17
Norristown, PA 17 mi Apr 8 Oct 31
Bridgeport, PA 19 mi Apr 8 Oct 31
Conshohocken, PA 19 mi Apr 8 Oct 31
Collegeville, PA 19 mi Apr 24 Oct 15

Frequently asked questions

When is the last frost in Doylestown?

On average, the last spring frost (32°F) in Doylestown is around April 13. In about 1 year in 10 it comes after April 27, and in 9 years in 10 it comes after April 1.

When is the first frost in Doylestown?

The first fall frost (32°F) usually arrives around October 30. There’s a 10% chance of a freeze by October 15 and a 90% chance by November 12.

Can it frost in Doylestown 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 27.

What growing zone is Doylestown?

Doylestown 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 18901. See growing zones in Pennsylvania.

More: all Pennsylvania frost dates · Pennsylvania growing zones · frost vs. freeze