Clarence, Pennsylvania climate: Normal weather by month, frost dates and records
Clarence's normal year runs from 14°F January nights to 82°F July afternoons, with 44.5 inches of precipitation and 50 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.9°C, January lows of −10°C, July highs of 28°C, 1,130 mm of precipitation a year.
- NOAA stationClarence
- Station IDUSC00361480
- Location41.05°N 77.94°W
- Elevation1,390 ft (424 m)
- Population (census place)767
On October 23, the normal high in Clarence is 59°F and the normal low 33°F, and the chance of measurable rain or snow is 41%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Clarence.
- Jan 33° 14°
- Feb 37° 14°
- Mar 46° 21°
- Apr 59° 31°
- May 70° 40°
- Jun 78° 50°
- Jul 82° 53°
- Aug 81° 52°
- Sep 74° 44°
- Oct 62° 35°
- Nov 49° 26°
- Dec 38° 21°
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 Clarence each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 14°F. The most precipitation falls in September (4.45 in), the least in February (2.56 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 33°F | 14°F | 23.4°F | 3.17 | 12.8 | 16 | <1 | 30 | 9 h 30 min |
| February | 37°F | 14°F | 25.1°F | 2.56 | 11.5 | 13 | <1 | 27 | 10 h 40 min |
| March | 46°F | 21°F | 33.5°F | 3.62 | 11.4 | 13 | <1 | 27 | 11 h 50 min |
| April | 59°F | 31°F | 45.3°F | 3.78 | 1.7 | 14 | <1 | 18 | 13 h 20 min |
| May | 70°F | 40°F | 55.1°F | 4.13 | 0.0 | 14 | <1 | 7 | 14 h 30 min |
| June | 78°F | 50°F | 63.8°F | 4.15 | 0.0 | 13 | 1 | 1 | 15 h 10 min |
| July | 82°F | 53°F | 67.7°F | 3.97 | 0.0 | 12 | 4 | <1 | 14 h 50 min |
| August | 81°F | 52°F | 66.2°F | 4.07 | 0.0 | 11 | 1 | <1 | 13 h 50 min |
| September | 74°F | 44°F | 59.2°F | 4.45 | 0.0 | 12 | 1 | 2 | 12 h 30 min |
| October | 62°F | 35°F | 48.3°F | 3.80 | 0.8 | 13 | <1 | 13 | 11 h 10 min |
| November | 49°F | 26°F | 37.4°F | 3.31 | 3.1 | 13 | <1 | 24 | 10 h |
| December | 38°F | 21°F | 29.2°F | 3.46 | 9.0 | 15 | <1 | 27 | 9 h 10 min |
| Year (annual) | 59°F | 33°F | 46.2°F | 44.47 | 50.3 | 157 | 6 | 175 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −10°C | −4.8°C | 81 mm | 33 cm |
| February | 3°C | −10°C | −3.8°C | 65 mm | 29 cm |
| March | 8°C | −6°C | 0.8°C | 92 mm | 29 cm |
| April | 15°C | 0°C | 7.4°C | 96 mm | 4 cm |
| May | 21°C | 4°C | 12.8°C | 105 mm | 0 cm |
| June | 26°C | 10°C | 17.7°C | 105 mm | 0 cm |
| July | 28°C | 12°C | 19.8°C | 101 mm | 0 cm |
| August | 27°C | 11°C | 19.0°C | 103 mm | 0 cm |
| September | 24°C | 7°C | 15.1°C | 113 mm | 0 cm |
| October | 17°C | 2°C | 9.1°C | 97 mm | 2 cm |
| November | 9°C | −3°C | 3.0°C | 84 mm | 8 cm |
| December | 3°C | −6°C | −1.6°C | 88 mm | 23 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00361480; 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 Clarence?
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 USC00361480.
When is the last frost in Clarence?
In Clarence, the last spring frost (32°F) comes after May 21 in half of years and after June 1 in one year in ten; the first autumn frost comes before September 27 in half of years and before September 12 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 211 year in 10 after June 1; 9 in 10 after April 30
- First autumn frost, half of years before
- September 271 year in 10 before September 12; 9 in 10 before October 13
NOAA puts the median frost-free season at 130 days, and the season without a hard freeze (28°F) at 153 days.
A hard freeze (28°F) comes after May 7 in half of springs and before October 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Clarence in zone 6a in ZIP code 16829, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Clarence's NOAA station is in zone 5b: the coldest night of a typical year reaches −14°F (15 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Pennsylvania · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00361480; 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 Clarence?
In a normal year in Clarence, 6 days a year reach 90°F, 175 nights fall to 32°F or colder and 157 days bring measurable precipitation.
- Days at 90°F or more
- 6a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 175a normal year
- Days that stay below freezing
- 44high of 32°F or less
- Days with 0.01 inch of precipitation
- 157a normal year
- Days with 1 inch of snow or more
- 15a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00361480.
How sunny is Clarence?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Clarence, 3.7 kWh per square metre a day. July is the sunniest month (75%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 59% | 1.6 |
| February | 64% | 2.5 |
| March | 65% | 3.6 |
| April | 66% | 4.6 |
| May | 67% | 5.3 |
| June | 72% | 5.8 |
| July | 75% | 5.8 |
| August | 75% | 5.1 |
| September | 72% | 4.1 |
| October | 65% | 2.7 |
| November | 63% | 1.9 |
| December | 55% | 1.3 |
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 Clarence need?
A normal year in Clarence brings 7,131 heating degree days, 33% more than the median U.S. place (5,373), and 299 cooling degree days, 67% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,104 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,289 | 0 |
| February | 1,118 | 0 |
| March | 976 | 0 |
| April | 593 | 0 |
| May | 318 | 11 |
| June | 90 | 53 |
| July | 33 | 115 |
| August | 50 | 87 |
| September | 204 | 30 |
| October | 521 | 3 |
| November | 828 | 0 |
| December | 1,110 | 0 |
| Year (annual) | 7,131 | 299 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00361480. 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 Clarence's climate compare?
Clarence is warmer than 10 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 59. Across the 7,247 U.S. stations with normals, its annual mean of 46.2°F is warmer than 24%.
In the Köppen classification computed from these normals, Clarence 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 Clarence share this climate record?
14 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.
- Milesburg, PA1,077 people · 11 mi SE
- Snow Shoe, PA666 people · 2 mi S
- Grassflat, PA539 people · 9 mi W
- Runville, PA467 people · 8 mi SE
- Moshannon, PA291 people · 4 mi W
- Drifting, PA261 people · 9 mi W
- Karthaus, PA255 people · 11 mi NW
- Moose Run, PA200 people · 10 mi SE
- Pine Glen, PA189 people · 7 mi NW
- Holters Crossing, PA132 people · 12 mi SE
- Mount Eagle, PA115 people · 13 mi E
- Orviston, PA74 people · 11 mi E
- Yarnell, PA74 people · 7 mi SE
- Monument, PA55 people · 13 mi E
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 Clarence's climate
What is the coldest month in Clarence?
January, with a normal high of 33°F and a normal low of 14°F. The warmest is July (82°F by day, 53°F at night).
Does it snow in Clarence?
Yes: 50 inches in a normal year, falling on 35 days with 0.1 inch or more, the most in January (12.8 inches).
What is the rainiest month in Clarence?
September, with 4.45 in of precipitation in a normal year; the driest is February with 2.56 in.
What plant hardiness zone is Clarence in?
The USDA's 2023 map puts Clarence in zone 6a in ZIP code 16829, the nearest ZIP area. By the same method at Clarence's NOAA station, the coldest night of a typical year reaches −14°F (15 years, 1991-2020): zone 5b.
How late can frost come in Clarence?
In half of years the last 32°F night comes after May 21; in one year in ten it comes after June 1. Waiting until June 1 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pennsylvania climateThe statewide normals and every place in the state
- State College, PA18 miles from this station, 50.1°F a year
- Philipsburg, PA19 miles from this station, 46.6°F a year
- Alvin R Bush Dam, PA21 miles from this station, 49.0°F a year
- Renovo, PA22 miles from this station, 49.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made