Uniontown, Pennsylvania climate: Normal weather by month, frost dates and records
Uniontown's normal year runs from 21°F January nights to 84°F July afternoons, with 44.4 inches of precipitation and 28 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.2°C, January lows of −6°C, July highs of 29°C, 1,126 mm of precipitation a year.
- NOAA stationUniontown (1 mi NE)
- Station IDUSC00369050
- Location39.91°N 79.72°W
- Elevation956 ft (291 m)
- From the center1 miles
- Population9,554
On October 23, the normal high in Uniontown is 63°F and the normal low 39°F, and the chance of measurable rain or snow is 39%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Uniontown.
- Jan 40° 21°
- Feb 43° 23°
- Mar 51° 29°
- Apr 64° 38°
- May 73° 48°
- Jun 81° 57°
- Jul 84° 62°
- Aug 83° 60°
- Sep 78° 53°
- Oct 66° 41°
- Nov 54° 32°
- Dec 44° 26°
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 Uniontown each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 21°F. The most precipitation falls in June (4.81 in), the least in February (2.81 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. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 40°F | 21°F | 30.4°F | 3.25 | 10.0 | 17 | <1 | 26 | 9 h 40 min |
| February | 43°F | 23°F | 32.6°F | 2.81 | 8.2 | 14 | <1 | 24 | 10 h 40 min |
| March | 51°F | 29°F | 39.9°F | 3.73 | 4.9 | 14 | <1 | 21 | 11 h 50 min |
| April | 64°F | 38°F | 51.2°F | 3.81 | 0.4 | 15 | <1 | 10 | 13 h 10 min |
| May | 73°F | 48°F | 60.9°F | 4.36 | 0.0 | 15 | <1 | 1 | 14 h 20 min |
| June | 81°F | 57°F | 69.0°F | 4.81 | 0.0 | 14 | 2 | <1 | 15 h |
| July | 84°F | 62°F | 73.1°F | 4.75 | 0.0 | 12 | 5 | <1 | 14 h 50 min |
| August | 83°F | 60°F | 71.7°F | 3.63 | 0.0 | 11 | 4 | <1 | 13 h 50 min |
| September | 78°F | 53°F | 65.2°F | 3.55 | 0.0 | 11 | 2 | <1 | 12 h 30 min |
| October | 66°F | 41°F | 53.6°F | 3.17 | 0.1 | 12 | <1 | 7 | 11 h 10 min |
| November | 54°F | 32°F | 42.8°F | 3.15 | 0.9 | 13 | <1 | 17 | 10 h |
| December | 44°F | 26°F | 35.1°F | 3.33 | 3.6 | 15 | <1 | 24 | 9 h 20 min |
| Year (annual) | 63°F | 41°F | 52.1°F | 44.35 | 28.1 | 161 | 14 | 129 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −6°C | −0.9°C | 83 mm | 25 cm |
| February | 6°C | −5°C | 0.3°C | 71 mm | 21 cm |
| March | 11°C | −2°C | 4.4°C | 95 mm | 12 cm |
| April | 18°C | 3°C | 10.7°C | 97 mm | 1 cm |
| May | 23°C | 9°C | 16.1°C | 111 mm | 0 cm |
| June | 27°C | 14°C | 20.6°C | 122 mm | 0 cm |
| July | 29°C | 17°C | 22.8°C | 121 mm | 0 cm |
| August | 28°C | 16°C | 22.1°C | 92 mm | 0 cm |
| September | 25°C | 12°C | 18.4°C | 90 mm | 0 cm |
| October | 19°C | 5°C | 12.0°C | 81 mm | 0 cm |
| November | 12°C | 0°C | 6.0°C | 80 mm | 2 cm |
| December | 7°C | −3°C | 1.7°C | 85 mm | 9 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00369050; 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 Uniontown?
Normal highs sit between 65°F and 85°F in May, June, July, August, September and October. Of those, September has the fewest days with rain (11).
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 USC00369050.
When is the last frost in Uniontown?
In Uniontown, the last spring frost (32°F) comes after April 30 in half of years and after May 18 in one year in ten; the first autumn frost comes before October 18 in half of years and before October 5 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 301 year in 10 after May 18; 9 in 10 after April 15
- First autumn frost, half of years before
- October 181 year in 10 before October 5; 9 in 10 before October 30
NOAA puts the median frost-free season at 171 days, and the season without a hard freeze (28°F) at 195 days.
A hard freeze (28°F) comes after April 17 in half of springs and before October 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Uniontown in zone 6b in ZIP code 15401, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Uniontown's NOAA station is in zone 6b: the coldest night of a typical year reaches −3°F (26 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 USC00369050; 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 Uniontown?
In a normal year in Uniontown, 14 days a year reach 90°F, 129 nights fall to 32°F or colder and 161 days bring measurable precipitation.
- Days at 90°F or more
- 14a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 129a normal year
- Days that stay below freezing
- 26high of 32°F or less
- Days with 0.01 inch of precipitation
- 161a normal year
- Days with 1 inch of snow or more
- 12a normal year
The highest temperature in this station's record (since 1894) is 102°F, on July 26, 1934; the lowest is −22°F, on January 22, 1994.
The wettest calendar year on that record is 1996, with 60.86 in; the snowiest season is 2009–10, with 83.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00369050; records: ACIS (NOAA Regional Climate Centers), station USC00369050. Records use complete months only; a month missing more than three days is left out.
How sunny is Uniontown?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Uniontown, 3.8 kWh per square metre a day. August is the sunniest month (76%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 55% | 1.7 |
| February | 59% | 2.5 |
| March | 62% | 3.5 |
| April | 66% | 4.7 |
| May | 67% | 5.3 |
| June | 73% | 5.9 |
| July | 75% | 5.8 |
| August | 76% | 5.2 |
| September | 74% | 4.3 |
| October | 67% | 3.0 |
| November | 66% | 2.1 |
| December | 55% | 1.5 |
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 Uniontown need?
A normal year in Uniontown brings 5,450 heating degree days, 1% more than the median U.S. place (5,373), and 791 cooling degree days, 13% 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 3,185 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,071 | 0 |
| February | 907 | 0 |
| March | 779 | 1 |
| April | 423 | 9 |
| May | 181 | 53 |
| June | 35 | 155 |
| July | 4 | 255 |
| August | 7 | 215 |
| September | 84 | 91 |
| October | 366 | 12 |
| November | 668 | 0 |
| December | 925 | 0 |
| Year (annual) | 5,450 | 791 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00369050. 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 Uniontown been warmer than normal lately?
Over 104 complete years from 1890 to 2017, the station's annual mean temperature rose at a fitted 0.8°F per century (+0.04°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Uniontown's climate compare?
Uniontown is warmer than 78 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 58. Across the 7,247 U.S. stations with normals, its annual mean of 52.1°F is warmer than 50%.
In the Köppen classification computed from these normals, Uniontown 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 Uniontown share this climate record?
9 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.
- Leith-Hatfield, PA2,621 people · 3 mi S
- Oliver, PA2,198 people · 0 mi W
- East Uniontown, PA2,181 people · 2 mi SE
- Hopwood, PA1,628 people · 3 mi S
- South Uniontown, PA1,201 people · 2 mi SW
- Grindstone, PA592 people · 9 mi NW
- Lemont Furnace, PA582 people · 3 mi E
- Rowes Run, PA517 people · 8 mi NW
- Smock, PA479 people · 7 mi NW
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 Uniontown's climate
What is the coldest month in Uniontown?
January, with a normal high of 40°F and a normal low of 21°F. The warmest is July (84°F by day, 62°F at night).
Does it snow in Uniontown?
Yes: 28 inches in a normal year, falling on 16 days with 0.1 inch or more, the most in January (10.0 inches).
What is the rainiest month in Uniontown?
June, with 4.81 in of precipitation in a normal year; the driest is February with 2.81 in.
What plant hardiness zone is Uniontown in?
The USDA's 2023 map puts Uniontown in zone 6b in ZIP code 15401, the nearest ZIP area. By the same method at Uniontown's NOAA station, the coldest night of a typical year reaches −3°F (26 years, 1991-2020): zone 6b.
How late can frost come in Uniontown?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 18. Waiting until May 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Uniontown in OctoberThis month day by day, its records and recent years
- Pennsylvania climateThe statewide normals and every place in the state
- Chalk Hill (2 mi ENE), PA8 miles from this station, 46.9°F a year
- Connellsville, PA9 miles from this station, 51.9°F a year
- Grays Landing, PA14 miles from this station, 51.7°F a year
- Lake Lynn, WV16 miles from this station, 52.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made