Doylestown, Pennsylvania climate: Normal weather by month, frost dates and records
Doylestown's normal year runs from 23°F January nights to 86°F July afternoons, with 47.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.9°C, January lows of −5°C, July highs of 30°C, 1,211 mm of precipitation a year.
- NOAA stationDoylestown Airport
- Station IDUSW00054786
- Location40.33°N 75.12°W
- Elevation394 ft (120 m)
- From the center1 miles
- Population8,382
On October 23, the normal high in Doylestown is 63°F and the normal low 43°F, and the chance of measurable rain or snow is 38%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Doylestown.
- Jan 39° 23°
- Feb 42° 25°
- Mar 50° 31°
- Apr 63° 41°
- May 72° 51°
- Jun 81° 60°
- Jul 86° 65°
- Aug 84° 63°
- Sep 77° 57°
- Oct 65° 45°
- Nov 54° 36°
- Dec 44° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Doylestown each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 23°F. The most precipitation falls in July (5.48 in), the least in February (2.47 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 39°F | 23°F | 31.0°F | 3.16 | 10 | <1 | 26 | 9 h 40 min |
| February | 42°F | 25°F | 33.3°F | 2.47 | 10 | <1 | 24 | 10 h 40 min |
| March | 50°F | 31°F | 40.8°F | 3.88 | 12 | <1 | 17 | 11 h 50 min |
| April | 63°F | 41°F | 51.9°F | 3.91 | 12 | <1 | 4 | 13 h 10 min |
| May | 72°F | 51°F | 61.6°F | 4.27 | 14 | 1 | <1 | 14 h 20 min |
| June | 81°F | 60°F | 70.3°F | 4.24 | 13 | 3 | <1 | 15 h |
| July | 86°F | 65°F | 75.4°F | 5.48 | 13 | 9 | <1 | 14 h 50 min |
| August | 84°F | 63°F | 73.5°F | 4.86 | 13 | 5 | <1 | 13 h 50 min |
| September | 77°F | 57°F | 66.8°F | 4.35 | 12 | 2 | <1 | 12 h 30 min |
| October | 65°F | 45°F | 55.2°F | 3.75 | 13 | <1 | 2 | 11 h 10 min |
| November | 54°F | 36°F | 44.9°F | 3.35 | 10 | <1 | 11 | 10 h |
| December | 44°F | 28°F | 35.9°F | 3.95 | 11 | <1 | 22 | 9 h 20 min |
| Year (annual) | 63°F | 44°F | 53.4°F | 47.67 | 141 | 20 | 106 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 4°C | −5°C | −0.6°C | 80 mm |
| February | 6°C | −4°C | 0.7°C | 63 mm |
| March | 10°C | 0°C | 4.9°C | 99 mm |
| April | 17°C | 5°C | 11.1°C | 99 mm |
| May | 22°C | 10°C | 16.4°C | 108 mm |
| June | 27°C | 15°C | 21.3°C | 108 mm |
| July | 30°C | 18°C | 24.1°C | 139 mm |
| August | 29°C | 17°C | 23.1°C | 123 mm |
| September | 25°C | 14°C | 19.3°C | 110 mm |
| October | 18°C | 7°C | 12.9°C | 95 mm |
| November | 12°C | 2°C | 7.2°C | 85 mm |
| December | 6°C | −2°C | 2.2°C | 100 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Lambertville (10 miles away), gets 13 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00054786; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Doylestown?
Normal highs sit between 65°F and 85°F in May, June, August, September and October. Of those, September has the fewest days with rain (12).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00054786.
When is the last frost in Doylestown?
In Doylestown, the last spring frost (32°F) comes after April 13 in half of years and after April 27 in one year in ten; the first autumn frost comes before October 30 in half of years and before October 15 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 131 year in 10 after April 27; 9 in 10 after April 1
- First autumn frost, half of years before
- October 301 year in 10 before October 15; 9 in 10 before November 12
NOAA puts the median frost-free season at 198 days, and the season without a hard freeze (28°F) at 223 days.
A hard freeze (28°F) comes after April 2 in half of springs and before November 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Doylestown in zone 7a in ZIP code 18901. By the map's own method, the average of each year's coldest night over 1991-2020, Doylestown's NOAA station is in zone 7a: the coldest night of a typical year reaches 5°F (19 complete years).
Frost dates for every NOAA station in Pennsylvania · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00054786; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Doylestown?
In a normal year in Doylestown, 20 days a year reach 90°F, 106 nights fall to 32°F or colder and 141 days bring measurable precipitation.
- Days at 90°F or more
- 20a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 106a normal year
- Days that stay below freezing
- 21high of 32°F or less
- Days with 0.01 inch of precipitation
- 141a normal year
The highest temperature in this station's record (since 1999) is 105°F, on July 22, 2011; the lowest is −4°F, on February 24, 2015.
The wettest calendar year on that record is 2011, with 63.46 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00054786; records: ACIS (NOAA Regional Climate Centers), station USW00054786. Records use complete months only; a month missing more than three days is left out.
How sunny is Doylestown?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Doylestown, 3.9 kWh per square metre a day. July is the sunniest month (79%) and December the cloudiest (63%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 1.9 |
| February | 68% | 2.7 |
| March | 67% | 3.6 |
| April | 70% | 4.8 |
| May | 69% | 5.3 |
| June | 74% | 5.9 |
| July | 79% | 6.0 |
| August | 77% | 5.2 |
| September | 75% | 4.2 |
| October | 69% | 3.0 |
| November | 70% | 2.1 |
| December | 63% | 1.6 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Doylestown need?
A normal year in Doylestown brings 5,160 heating degree days, 4% fewer than the median U.S. place (5,373), and 959 cooling degree days, 6% more than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,410 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,052 | 0 |
| February | 888 | 0 |
| March | 750 | 0 |
| April | 406 | 11 |
| May | 157 | 51 |
| June | 23 | 182 |
| July | 1 | 321 |
| August | 3 | 267 |
| September | 58 | 112 |
| October | 318 | 14 |
| November | 605 | 0 |
| December | 901 | 0 |
| Year (annual) | 5,160 | 959 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00054786. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Doylestown been warmer than normal lately?
2023 averaged 56.2°F, 2.8°F above the 1991-2020 normal of 53.4°F. 3 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 55.8°F | +2.4°F | – |
| 2022 | 54.9°F | +1.5°F | – |
| 2023 | 56.2°F | +2.8°F | – |
Source: observed years: ACIS, station USW00054786. A year counts only with all twelve months complete.
How does Doylestown's climate compare?
Doylestown is warmer than 98 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 83. Across the 7,247 U.S. stations with normals, its annual mean of 53.4°F is warmer than 55%.
In the Köppen classification computed from these normals, Doylestown is Dfa: continental, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Doylestown share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Chalfont, PA4,415 people · 5 mi SW
- New Britain, PA2,814 people · 4 mi SW
- Stockton, NJ499 people · 10 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Doylestown's climate
What is the coldest month in Doylestown?
January, with a normal high of 39°F and a normal low of 23°F. The warmest is July (86°F by day, 65°F at night).
Does it snow in Doylestown?
Yes. NOAA publishes no 1991-2020 snowfall normal for Doylestown's NOAA station; the nearest record that keeps one, Lambertville (10 miles away), records 13 inches of snow in a normal year.
What is the rainiest month in Doylestown?
July, with 5.48 in of precipitation in a normal year; the driest is February with 2.47 in.
What plant hardiness zone is Doylestown in?
The USDA's 2023 map puts Doylestown in zone 7a in ZIP code 18901. By the same method at Doylestown's NOAA station, the coldest night of a typical year reaches 5°F (19 years, 1991-2020): zone 7a.
How late can frost come in Doylestown?
In half of years the last 32°F night comes after April 13; in one year in ten it comes after April 27. Waiting until April 27 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Doylestown in OctoberThis month day by day, its records and recent years
- Pennsylvania climateThe statewide normals and every place in the state
- Willow Grove, PA9 miles from this station, 54.0°F a year
- Lambertville, NJ9 miles from this station, 53.1°F a year
- Sellersville, PA10 miles from this station, 51.4°F a year
- Bucksville, PA12 miles from this station, 51.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made