Clarion, Pennsylvania climate: Normal weather by month, frost dates and records
Clarion's normal year runs from 16°F January nights to 82°F July afternoons, with 46.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.7°C, January lows of −9°C, July highs of 28°C, 1,191 mm of precipitation a year.
- NOAA stationClarion (3 mi SW)
- Station IDUSC00361485
- Location41.19°N 79.44°W
- Elevation1,040 ft (317 m)
- From the center3 miles
- Population4,141
On October 23, the normal high in Clarion is 59°F and the normal low 35°F, and the chance of measurable rain or snow is 45%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Clarion.
- Jan 33° 16°
- Feb 36° 16°
- Mar 46° 23°
- Apr 60° 33°
- May 71° 44°
- Jun 79° 53°
- Jul 82° 57°
- Aug 81° 56°
- Sep 74° 50°
- Oct 62° 38°
- Nov 49° 29°
- Dec 38° 22°
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 Clarion each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 16°F. The most precipitation falls in July (5.31 in), the least in February (2.71 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 33°F | 16°F | 24.4°F | 3.64 | 19 | <1 | 29 | 9 h 30 min |
| February | 36°F | 16°F | 26.0°F | 2.71 | 15 | <1 | 26 | 10 h 40 min |
| March | 46°F | 23°F | 34.4°F | 3.50 | 15 | <1 | 26 | 11 h 50 min |
| April | 60°F | 33°F | 46.4°F | 4.05 | 15 | <1 | 15 | 13 h 20 min |
| May | 71°F | 44°F | 57.3°F | 3.86 | 14 | 1 | 3 | 14 h 30 min |
| June | 79°F | 53°F | 65.6°F | 4.66 | 14 | 2 | <1 | 15 h 10 min |
| July | 82°F | 57°F | 69.6°F | 5.31 | 12 | 3 | <1 | 14 h 50 min |
| August | 81°F | 56°F | 68.4°F | 4.22 | 11 | 3 | <1 | 13 h 50 min |
| September | 74°F | 50°F | 61.7°F | 4.00 | 12 | 1 | <1 | 12 h 30 min |
| October | 62°F | 38°F | 50.0°F | 3.64 | 14 | <1 | 8 | 11 h 10 min |
| November | 49°F | 29°F | 38.9°F | 3.56 | 14 | <1 | 21 | 10 h |
| December | 38°F | 22°F | 30.0°F | 3.73 | 17 | <1 | 28 | 9 h 10 min |
| Year (annual) | 59°F | 36°F | 47.7°F | 46.88 | 172 | 9 | 155 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 1°C | −9°C | −4.2°C | 92 mm |
| February | 2°C | −9°C | −3.3°C | 69 mm |
| March | 8°C | −5°C | 1.3°C | 89 mm |
| April | 16°C | 0°C | 8.0°C | 103 mm |
| May | 22°C | 6°C | 14.1°C | 98 mm |
| June | 26°C | 11°C | 18.7°C | 118 mm |
| July | 28°C | 14°C | 20.9°C | 135 mm |
| August | 27°C | 13°C | 20.2°C | 107 mm |
| September | 23°C | 10°C | 16.5°C | 102 mm |
| October | 17°C | 3°C | 10.0°C | 92 mm |
| November | 9°C | −2°C | 3.8°C | 90 mm |
| December | 3°C | −5°C | −1.1°C | 95 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Tionesta (20 miles away), gets 51 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00361485; 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 Clarion?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, August 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 USC00361485.
When is the last frost in Clarion?
In Clarion, the last spring frost (32°F) comes after May 9 in half of years and after May 24 in one year in ten; the first autumn frost comes before October 11 in half of years and before September 30 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
- May 91 year in 10 after May 24; 9 in 10 after April 24
- First autumn frost, half of years before
- October 111 year in 10 before September 30; 9 in 10 before October 26
NOAA puts the median frost-free season at 154 days, and the season without a hard freeze (28°F) at 178 days.
A hard freeze (28°F) comes after April 29 in half of springs and before October 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Clarion in zone 6a in ZIP code 16214, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Clarion's NOAA station is in zone 6a: the coldest night of a typical year reaches −6°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 USC00361485; 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 Clarion?
In a normal year in Clarion, 9 days a year reach 90°F, 155 nights fall to 32°F or colder and 172 days bring measurable precipitation.
- Days at 90°F or more
- 9a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 155a normal year
- Days that stay below freezing
- 41high of 32°F or less
- Days with 0.01 inch of precipitation
- 172a normal year
The highest temperature in this station's record (since 1943) is 104°F, on August 29, 1991; the lowest is −26°F, on February 2, 1961.
The wettest calendar year on that record is 1972, with 59.17 in; the snowiest season is 1950–51, with 65.9 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00361485; records: ACIS (NOAA Regional Climate Centers), station USC00361485. Records use complete months only; a month missing more than three days is left out.
How sunny is Clarion?
Over a year 67% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Clarion, 3.6 kWh per square metre a day. August is the sunniest month (76%) and December the cloudiest (47%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 52% | 1.5 |
| February | 56% | 2.2 |
| March | 59% | 3.3 |
| April | 65% | 4.5 |
| May | 68% | 5.3 |
| June | 73% | 5.9 |
| July | 76% | 5.9 |
| August | 76% | 5.2 |
| September | 73% | 4.2 |
| October | 63% | 2.7 |
| November | 60% | 1.8 |
| December | 47% | 1.1 |
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 Clarion need?
A normal year in Clarion brings 6,709 heating degree days, 25% more than the median U.S. place (5,373), and 448 cooling degree days, 51% 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 2,453 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,258 | 0 |
| February | 1,093 | 0 |
| March | 950 | 0 |
| April | 559 | 1 |
| May | 262 | 25 |
| June | 67 | 87 |
| July | 16 | 158 |
| August | 24 | 131 |
| September | 141 | 43 |
| October | 470 | 3 |
| November | 783 | 0 |
| December | 1,085 | 0 |
| Year (annual) | 6,709 | 448 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00361485. 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.
How does Clarion's climate compare?
Clarion is warmer than 23 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 76. Across the 7,247 U.S. stations with normals, its annual mean of 47.7°F is warmer than 31%.
In the Köppen classification computed from these normals, Clarion is Dfb: continental, no dry season, warm 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 Clarion share this climate record?
13 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.
- Knox, PA1,074 people · 6 mi NW
- Marianne, PA1,045 people · 4 mi N
- Rimersburg, PA929 people · 11 mi S
- East Brady, PA804 people · 17 mi SW
- Parker, PA678 people · 15 mi SW
- Sligo, PA671 people · 7 mi SW
- Emlenton, PA600 people · 14 mi W
- Strattanville, PA524 people · 6 mi E
- Summerville, PA500 people · 14 mi E
- Shippenville, PA443 people · 4 mi N
- St. Petersburg, PA330 people · 12 mi W
- Foxburg, PA180 people · 13 mi W
- Callensburg, PA141 people · 8 mi SW
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 Clarion's climate
What is the coldest month in Clarion?
January, with a normal high of 33°F and a normal low of 16°F. The warmest is July (82°F by day, 57°F at night).
Does it snow in Clarion?
Yes. NOAA publishes no 1991-2020 snowfall normal for Clarion's NOAA station; the nearest record that keeps one, Tionesta (20 miles away), records 51 inches of snow in a normal year.
What is the rainiest month in Clarion?
July, with 5.31 in of precipitation in a normal year; the driest is February with 2.71 in.
What plant hardiness zone is Clarion in?
The USDA's 2023 map puts Clarion in zone 6a in ZIP code 16214, the nearest ZIP area. By the same method at Clarion's NOAA station, the coldest night of a typical year reaches −6°F (19 years, 1991-2020): zone 6a.
How late can frost come in Clarion?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 24. Waiting until May 24 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pennsylvania climateThe statewide normals and every place in the state
- Cooksburg (2 mi NW), PA16 miles from this station, 46.0°F a year
- Tionesta, PA20 miles from this station, 49.9°F a year
- Putneyville 2 SE Dam, PA20 miles from this station, 48.7°F a year
- Franklin, PA25 miles from this station, 49.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made