Hidden Valley, Pennsylvania climate: Climate normals at a NOAA weather station
Hidden Valley's normal year runs from 17°F January nights to 77°F July afternoons, with 55.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.4°C, January lows of −8°C, July highs of 25°C, 1,421 mm of precipitation a year.
- NOAA stationHidden Valley
- Station IDUSC00363928
- Location40.04°N 79.26°W
- Elevation2,876 ft (877 m)
On October 23, the normal high in Hidden Valley is 56°F and the normal low 37°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Hidden Valley.
- Jan 32° 17°
- Feb 35° 18°
- Mar 44° 25°
- Apr 57° 34°
- May 67° 47°
- Jun 72° 56°
- Jul 77° 61°
- Aug 75° 59°
- Sep 70° 52°
- Oct 59° 40°
- Nov 47° 30°
- Dec 37° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Hidden Valley each month?
July is the warmest month, with normal highs of 77°F; January the coldest, with normal lows of 17°F. The most precipitation falls in April (5.54 in), the least in October (4.10 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 32°F | 17°F | 24.3°F | 4.48 | – | <1 | 28 | 9 h 40 min |
| February | 35°F | 18°F | 26.4°F | 4.86 | – | <1 | 22 | 10 h 40 min |
| March | 44°F | 25°F | 34.2°F | 4.48 | – | <1 | 26 | 11 h 50 min |
| April | 57°F | 34°F | 45.6°F | 5.54 | – | <1 | 14 | 13 h 10 min |
| May | 67°F | 47°F | 56.9°F | 5.37 | – | <1 | 2 | 14 h 20 min |
| June | 72°F | 56°F | 64.0°F | 4.73 | – | <1 | <1 | 15 h |
| July | 77°F | 61°F | 69.1°F | 4.15 | – | <1 | <1 | 14 h 50 min |
| August | 75°F | 59°F | 67.0°F | 4.72 | – | <1 | <1 | 13 h 50 min |
| September | 70°F | 52°F | 61.1°F | 4.31 | – | <1 | <1 | 12 h 30 min |
| October | 59°F | 40°F | 49.3°F | 4.10 | – | <1 | 3 | 11 h 10 min |
| November | 47°F | 30°F | 38.4°F | 4.18 | – | <1 | 21 | 10 h |
| December | 37°F | 23°F | 29.7°F | 5.01 | – | <1 | 27 | 9 h 20 min |
| Year (annual) | 56°F | 38°F | 47.1°F | 55.93 | – | <1 | 142 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 0°C | −8°C | −4.3°C | 114 mm |
| February | 2°C | −8°C | −3.1°C | 123 mm |
| March | 7°C | −4°C | 1.2°C | 114 mm |
| April | 14°C | 1°C | 7.6°C | 141 mm |
| May | 19°C | 8°C | 13.8°C | 136 mm |
| June | 22°C | 13°C | 17.8°C | 120 mm |
| July | 25°C | 16°C | 20.6°C | 105 mm |
| August | 24°C | 15°C | 19.4°C | 120 mm |
| September | 21°C | 11°C | 16.2°C | 109 mm |
| October | 15°C | 4°C | 9.6°C | 104 mm |
| November | 8°C | −1°C | 3.6°C | 106 mm |
| December | 3°C | −5°C | −1.3°C | 127 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Laurel Summit (11 miles away), gets 142 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00363928; 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.
Which months are mildest at Hidden Valley?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
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 USC00363928.
When is the last frost at Hidden Valley?
In Hidden Valley, the last spring frost (32°F) comes after May 2 in half of years and after May 18 in one year in ten; the first autumn frost comes before October 17 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
- May 21 year in 10 after May 18; 9 in 10 after April 19
- First autumn frost, half of years before
- October 171 year in 10 before October 5; 9 in 10 before October 30
NOAA puts the median frost-free season at 168 days, and the season without a hard freeze (28°F) at 189 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hidden Valley in zone 6a in ZIP code 15502, 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 USC00363928; 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 at Hidden Valley?
In a normal year in Hidden Valley, a 90°F day is rare and 142 nights fall to 32°F or colder.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 142a normal year
- Days that stay below freezing
- 55high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00363928.
How sunny is it at Hidden Valley?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds at Hidden Valley, 3.7 kWh per square metre a day. August is the sunniest month (76%) and December the cloudiest (51%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 53% | 1.6 |
| February | 58% | 2.4 |
| March | 61% | 3.4 |
| April | 66% | 4.6 |
| May | 69% | 5.3 |
| June | 73% | 5.9 |
| July | 76% | 5.9 |
| August | 76% | 5.3 |
| September | 75% | 4.3 |
| October | 66% | 2.9 |
| November | 65% | 2.0 |
| December | 51% | 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 many heating and cooling degree days does Hidden Valley record?
A normal year at Hidden Valley brings 6,799 heating degree days, 27% more than the median U.S. place (5,373), and 320 cooling degree days, 65% 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 2,301 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,263 | 0 |
| February | 1,082 | 0 |
| March | 956 | 0 |
| April | 584 | 0 |
| May | 268 | 15 |
| June | 75 | 45 |
| July | 8 | 133 |
| August | 30 | 90 |
| September | 152 | 35 |
| October | 488 | 1 |
| November | 800 | 0 |
| December | 1,094 | 0 |
| Year (annual) | 6,799 | 320 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00363928. 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.
Have recent years at Hidden Valley been warmer than normal?
2025 averaged 47.5°F, 0.4°F above the 1991-2020 normal of 47.1°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 48.2°F | +1.1°F | 58.27 |
| 2022 | 46.8°F | −0.3°F | 61.31 |
| 2023 | 48.8°F | +1.7°F | 63.23 |
| 2024 | 50.0°F | +2.9°F | 61.21 |
| 2025 | 47.5°F | +0.4°F | 65.17 |
Source: observed years: ACIS, station USC00363928. A year counts only with all twelve months complete.
How does Hidden Valley's climate compare?
Hidden Valley is warmer than 16 of the 108 places with their own NOAA record in Pennsylvania, and wetter than 105. Across the 7,247 U.S. stations with normals, its annual mean of 47.1°F is warmer than 28%.
In the Köppen classification computed from these normals, Hidden Valley 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 Hidden Valley 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.
- Somerset, PA5,870 people · 10 mi E
- Rockwood, PA820 people · 10 mi SE
- New Centerville, PA123 people · 8 mi SE
- Seven Springs, PA24 people · 2 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 Hidden Valley's climate
What is the coldest month at Hidden Valley?
January, with a normal high of 32°F and a normal low of 17°F. The warmest is July (77°F by day, 61°F at night).
Does it snow at Hidden Valley?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Laurel Summit (11 miles away), records 142 inches of snow in a normal year.
What is the rainiest month at Hidden Valley?
April, with 5.54 in of precipitation in a normal year; the driest is October with 4.10 in.
What plant hardiness zone is Hidden Valley in?
The USDA's 2023 map puts Hidden Valley in zone 6a in ZIP code 15502, the nearest ZIP area.
How late can frost come at Hidden Valley?
In half of years the last 32°F night comes after May 2; 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
- Pennsylvania climateThe statewide normals and every place in the state
- Rector (3 mi SSW), PA9 miles from this station, 50.2°F a year
- Donegal, PA10 miles from this station, 49.6°F a year
- Laurel Summit, PA11 miles from this station, 45.6°F a year
- Laurel Mountain, PA12 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