Slippery Rock, PA Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Slippery Rock's primary NOAA station, SLIPPERY ROCK 1 SSW.
The climate verdict for Slippery Rock
Water is the standout signal in Slippery Rock, Pennsylvania: 45.2 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 48°F. Its climate comfort score of 64/100 (good) lands mid-pack nationally, exceeding 49% of station-mapped location scores.
- 48°F
- average temperature, NOAA 1991-2020 normal
- 64/100
- comfort score, above 49% of station-mapped location scores
- 45.2"
- yearly precipitation total
- 160 days
- growing season, frost-free days
Slippery Rock: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00368184 · Slippery Rock, PA 48°F mean · 45.2" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 48°F
- RANK-COOL #2,196
- PHOTO-FINISH ≈ Kings Rvr Vly -…
- PRCP-MID 45.2"
- SWING-MID 45°F
- COMF-MID 64/100
- LOAD-HEAT 6,575 HDD
- STN-1 USC00368184
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Kings Rvr Vly - Orovada, NV (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every PA station list.
- Slippery Rock (this station) 48°F
- Cold Mahanoy City, PA 48°F
- Hot Southbridge, MA 48°F
- Near Kings Rvr Vly -…, NV 48°F
- Near Carmel, NY 48°F
Climate Living Index · Slippery Rock
Slippery Rock: 43/100 · grade D
Slippery Rock publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Slippery Rock, not an official NOAA rating. Rankings still use Comfort Score 64/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 45.2 in · 10.2 from 35 in | 64/100 · C |
| Normal heat + freeze calendar | 150 calendar days | 46/100 · D |
| Frost-free season | 160 days/year | 33/100 · F |
| Annual temperature balance | 48.1°F · 19.4° from 67.5°F | 32/100 · F |
Slippery Rock · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Slippery Rock is a continental Köppen climate: Dfb
Coldest-month mean 25.1°F and warmest-month mean 69.7°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 69.7°F
- Coldest month
- 25.1°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Slippery Rock sits across the climate record
Three NOAA fields for Slippery Rock's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 32nd percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 69th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- 56th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Slippery Rock compares across U.S. station-mapped locations
Slippery Rock's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
64 49th percentile score exceeds 49% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Slippery Rock's measured station temperature trend
MethodologyAcross 57 complete annual observations from 1951 to 2023, SLIPPERY ROCK 1 SSW warmed at a fitted rate of 0.14°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Slippery Rock primary station fitted change +0.14 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 33°F (1°C) | 17°F (-8°C) | 25°F (-4°C) | 3.5" | 27.4 | 0.0 |
| February | 37°F (3°C) | 18°F (-8°C) | 27°F (-3°C) | 2.7" | 24.8 | 0.0 |
| March | 46°F (8°C) | 25°F (-4°C) | 36°F (2°C) | 3.4" | 23.2 | 0.0 |
| April | 59°F (15°C) | 35°F (2°C) | 47°F (8°C) | 3.9" | 12.4 | 0.0 |
| May | 69°F (21°C) | 45°F (7°C) | 57°F (14°C) | 4.1" | 3.2 | 0.6 |
| June | 77°F (25°C) | 54°F (12°C) | 65°F (19°C) | 4.8" | 0.0 | 2.2 |
| July | 81°F (27°C) | 58°F (14°C) | 70°F (21°C) | 4.6" | 0.0 | 5.5 |
| August | 80°F (27°C) | 56°F (14°C) | 68°F (20°C) | 4.0" | 0.0 | 3.8 |
| September | 74°F (23°C) | 50°F (10°C) | 62°F (17°C) | 4.1" | 0.3 | 1.0 |
| October | 62°F (16°C) | 39°F (4°C) | 51°F (10°C) | 3.5" | 7.3 | 0.1 |
| November | 49°F (9°C) | 31°F (-1°C) | 40°F (4°C) | 3.5" | 18.1 | 0.0 |
| December | 38°F (3°C) | 23°F (-5°C) | 31°F (-1°C) | 3.2" | 25.3 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 82°F around July 14, short of 90°F on every date, while 150 dates carry a normal low at or below freezing, the coldest 16°F near January 26.
The freezing stretch
The normal low stays at or below 32°F into April 7, then returns to freezing around November 10, covering 150 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is January 8, when 54% of years recorded at least a hundredth of an inch. The driest is September 1 at 37%. Summed across the calendar, that is about 164 wet dates a year.
The widest day
April 29 carries the biggest normal gap between afternoon and dawn, 25°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Slippery Rock.
Monthly Precipitation
Average monthly rainfall
17.2 days with precipitation
13.6 days with precipitation
13.1 days with precipitation
14.2 days with precipitation
15.0 days with precipitation
14.1 days with precipitation
12.6 days with precipitation
11.3 days with precipitation
11.2 days with precipitation
13.5 days with precipitation
13.2 days with precipitation
15.2 days with precipitation
Slippery Rock spreads its precipitation across the year
Neither half of the year dominates here: June through August take 30% of the annual total and December through February 21%, with neither reaching the 35% that would mark a distinct wet season. Slippery Rock has no dry season to plan around, though it does carry a 44.6°F seasonal spread.
The gap between the wettest and driest month still matters: June averages 4.8" and February 2.7". The three wettest months together take 30% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How Slippery Rock's precipitation splits across the calendar
About 164 days a year record measurable precipitation here, carrying 45.2" between them, or roughly 0.28 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Frost Dates & Growing Season
First Fall Freeze
October 14
50% probability date
Last Spring Freeze
May 7
50% probability date
Growing Season
160 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,575
Higher = more heating needed
Cooling Degree Days
454
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside PA closest to Slippery Rock on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (48°F here).
- Boone, IA 48°F · 0.0°F off
- Castleford, ID 48°F · 0.0°F off
- Concord, NE 48°F · 0.0°F off
- Crofton, NE 48°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (45.2" here), excluding temperature-peer places.
- Columbia, SC 45.2" · 0.0" off
- Hampton, SC 45.3" · 0.0" off
- Union, SC 45.3" · 0.0" off
- Buffalo, MO 45.3" · 0.0" off
Data-derived climate profile
How Slippery Rock's climate pattern fits together
heating led · wet · mid swing
Slippery Rock's energy balance leans toward cold weather: 6,575 annual heating degree days against 454 for cooling. Its 44.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Slippery Rock's frost-free season lasts about 160 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Slippery Rock's middle-range seasonal profile. The measured spread is 44.6°F. The annual average is 48°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Slippery Rock carries 45.2 inches of precipitation in a normal year, inside PlainClimate's wet range. Snowfall is not added to the interpretation because its annual value is missing. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Slippery Rock's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Slippery Rock, not an official NOAA class or a year-ahead forecast.
Questions about Slippery Rock's climate
How much rain does Slippery Rock get? ▼
How cold does Slippery Rock get in winter? ▼
How much energy does heating and cooling require in Slippery Rock? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Slippery Rock's primary station: SLIPPERY ROCK 1 SSW (USC00368184). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 4271184). Match rule for Slippery Rock: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Slippery Rock comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.