Avondale, Pennsylvania climate: Normal weather by month, frost dates and records
Avondale's normal year runs from 23°F January nights to 84°F July afternoons, with 47.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.3°C, January lows of −5°C, July highs of 29°C, 1,197 mm of precipitation a year.
- NOAA stationAvondale (2 mi N)
- Station IDUSW00003761
- Location39.86°N 75.79°W
- Elevation400 ft (122 m)
- From the center2 miles
- Population1,274
On October 23, the normal high in Avondale is 61°F and the normal low 41°F, and the chance of measurable rain or snow is 31%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Avondale.
- Jan 39° 23°
- Feb 41° 24°
- Mar 50° 31°
- Apr 62° 40°
- May 71° 50°
- Jun 80° 59°
- Jul 84° 64°
- Aug 82° 62°
- Sep 75° 55°
- Oct 64° 44°
- Nov 53° 34°
- Dec 43° 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 Avondale each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 23°F. The most precipitation falls in September (4.47 in), the least in February (3.12 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 39°F | 23°F | 30.6°F | 3.62 | 11 | <1 | 26 | 9 h 40 min |
| February | 41°F | 24°F | 32.6°F | 3.12 | 12 | <1 | 23 | 10 h 40 min |
| March | 50°F | 31°F | 40.4°F | 4.40 | 12 | <1 | 17 | 11 h 50 min |
| April | 62°F | 40°F | 50.8°F | 3.79 | 11 | <1 | 5 | 13 h 10 min |
| May | 71°F | 50°F | 60.7°F | 3.58 | 12 | <1 | <1 | 14 h 20 min |
| June | 80°F | 59°F | 69.2°F | 4.43 | 11 | 1 | <1 | 15 h |
| July | 84°F | 64°F | 73.6°F | 4.17 | 10 | 4 | <1 | 14 h 40 min |
| August | 82°F | 62°F | 71.7°F | 4.28 | 10 | 1 | <1 | 13 h 50 min |
| September | 75°F | 55°F | 65.2°F | 4.47 | 8 | 1 | <1 | 12 h 30 min |
| October | 64°F | 44°F | 53.9°F | 4.03 | 10 | <1 | 2 | 11 h 10 min |
| November | 53°F | 34°F | 43.8°F | 3.22 | 8 | <1 | 13 | 10 h |
| December | 43°F | 28°F | 35.4°F | 4.03 | 12 | <1 | 22 | 9 h 20 min |
| Year (annual) | 62°F | 43°F | 52.3°F | 47.14 | 128 | 8 | 109 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 4°C | −5°C | −0.8°C | 92 mm |
| February | 5°C | −4°C | 0.3°C | 79 mm |
| March | 10°C | −1°C | 4.7°C | 112 mm |
| April | 16°C | 5°C | 10.4°C | 96 mm |
| May | 22°C | 10°C | 15.9°C | 91 mm |
| June | 26°C | 15°C | 20.7°C | 113 mm |
| July | 29°C | 18°C | 23.1°C | 106 mm |
| August | 28°C | 17°C | 22.1°C | 109 mm |
| September | 24°C | 13°C | 18.4°C | 114 mm |
| October | 18°C | 7°C | 12.2°C | 102 mm |
| November | 12°C | 1°C | 6.6°C | 82 mm |
| December | 6°C | −2°C | 1.9°C | 102 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Coatesville (10 miles away), gets 32 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003761; 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 Avondale?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (8).
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 USW00003761.
When is the last frost in Avondale?
In Avondale, the last spring frost (32°F) comes after April 19 in half of years and after May 3 in one year in ten; the first autumn frost comes before October 26 in half of years and before October 11 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 191 year in 10 after May 3; 9 in 10 after April 1
- First autumn frost, half of years before
- October 261 year in 10 before October 11; 9 in 10 before November 8
NOAA puts the median frost-free season at 189 days, and the season without a hard freeze (28°F) at 214 days.
A hard freeze (28°F) comes after April 5 in half of springs and before November 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Avondale in zone 7a in ZIP code 19311, the nearest ZIP area.
Frost dates for every NOAA station in Pennsylvania · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00003761; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Avondale?
In a normal year in Avondale, 8 days a year reach 90°F, 109 nights fall to 32°F or colder and 128 days bring measurable precipitation.
- Days at 90°F or more
- 8a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 109a normal year
- Days that stay below freezing
- 21high of 32°F or less
- Days with 0.01 inch of precipitation
- 128a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USW00003761.
How sunny is Avondale?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Avondale, 4.1 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (68%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 68% | 2.0 |
| February | 71% | 2.9 |
| March | 69% | 3.8 |
| April | 73% | 5.0 |
| May | 72% | 5.6 |
| June | 78% | 6.2 |
| July | 82% | 6.2 |
| August | 80% | 5.4 |
| September | 77% | 4.4 |
| October | 73% | 3.2 |
| November | 74% | 2.3 |
| December | 68% | 1.8 |
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 Avondale need?
A normal year in Avondale brings 5,359 heating degree days, 0% fewer than the median U.S. place (5,373), and 778 cooling degree days, 14% fewer 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 3,143 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,065 | 0 |
| February | 907 | 0 |
| March | 763 | 0 |
| April | 432 | 7 |
| May | 172 | 39 |
| June | 24 | 151 |
| July | 2 | 270 |
| August | 6 | 214 |
| September | 79 | 87 |
| October | 356 | 10 |
| November | 636 | 0 |
| December | 918 | 0 |
| Year (annual) | 5,359 | 778 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003761. 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 Avondale been warmer than normal lately?
2025 averaged 52.7°F, 0.4°F above the 1991-2020 normal of 52.3°F. 3 of the 3 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 54.3°F | +2.0°F | 41.81 |
| 2024 | 54.6°F | +2.3°F | 47.58 |
| 2025 | 52.7°F | +0.4°F | 41.59 |
Source: observed years: ACIS, station USW00003761. A year counts only with all twelve months complete.
How does Avondale's climate compare?
Avondale is warmer than 81 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 79. Across the 7,247 U.S. stations with normals, its annual mean of 52.3°F is warmer than 51%.
In the Köppen classification computed from these normals, Avondale 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 Avondale share this climate record?
4 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.
- Hockessin, DE13,608 people · 8 mi SE
- Pike Creek Valley, DE11,992 people · 10 mi SE
- North Star, DE8,178 people · 8 mi S
- Pike Creek, DE7,185 people · 9 mi SE
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 Avondale's climate
What is the coldest month in Avondale?
January, with a normal high of 39°F and a normal low of 23°F. The warmest is July (84°F by day, 64°F at night).
Does it snow in Avondale?
Yes. NOAA publishes no 1991-2020 snowfall normal for Avondale's NOAA station; the nearest record that keeps one, Coatesville (10 miles away), records 32 inches of snow in a normal year.
What is the rainiest month in Avondale?
September, with 4.47 in of precipitation in a normal year; the driest is February with 3.12 in.
What plant hardiness zone is Avondale in?
The USDA's 2023 map puts Avondale in zone 7a in ZIP code 19311, the nearest ZIP area.
How late can frost come in Avondale?
In half of years the last 32°F night comes after April 19; in one year in ten it comes after May 3. Waiting until May 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pennsylvania climateThe statewide normals and every place in the state
- Coatesville, PA9 miles from this station, 52.8°F a year
- West Chester, PA11 miles from this station, 52.4°F a year
- Newark, DE14 miles from this station, 55.7°F a year
- Wilmington Porter Research, DE14 miles from this station, 53.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made