Keystone, PA
Unincorporated community in Westmoreland County, Pennsylvania
Keystone is a small unincorporated community in Westmoreland County, Pennsylvania. It is 0.4 miles SW of Herminie, the nearest town. Its ZIP code is 15637.
Keystone at a glance
- State
- Pennsylvania
- County
- Westmoreland County
- ZIP code
- 15637
- Nearest town
- Herminie (0.4 mi)
- Time zone
- America/New York
- Coordinates
- 40.2675, -79.7081
Weather in Keystone now
Loading the National Weather Service forecast…
Keystone weather by the hour
Keystone weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Keystone.
This week in Keystone
Sunrise, sunset and moon in Keystone
What is the weather usually like in Keystone?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 85°F average high
- Januarycoldest month · 20°F average low
- 42.4 inprecipitation per year · 1,076 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Keystone: May–June and August–September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station MCKEESPORT, PA US (USC00365573), adjusted for the elevation of Keystone.
Keystone weather month by month
Sunrise and sunset in Keystone through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:37 AM | 5:18 PM | 9 h 41 min |
| February | 7:10 AM | 5:55 PM | 10 h 45 min |
| March | 7:28 AM | 7:26 PM | 11 h 58 min |
| April | 6:38 AM | 7:58 PM | 13 h 20 min |
| May | 6:01 AM | 8:29 PM | 14 h 28 min |
| June | 5:46 AM | 8:51 PM | 15 h 4 min |
| July | 6:00 AM | 8:49 PM | 14 h 48 min |
| August | 6:28 AM | 8:17 PM | 13 h 48 min |
| September | 6:58 AM | 7:29 PM | 12 h 30 min |
| October | 7:28 AM | 6:40 PM | 11 h 12 min |
| November | 7:03 AM | 5:03 PM | 10 h 0 min |
| December | 7:32 AM | 4:55 PM | 9 h 22 min |
Times for the 15th of each month, local time (America/New York).
What is the weather like in Keystone?
Keystone has a hot-summer humid continental climate. The warmest month is July, with an average high of 85°F (29°C), and the coldest is January, with average lows of 20°F (-6°C).
It gets about 42.4 inches (1,076 mm) of precipitation a year. The wettest month is June and the driest is February.
The best time to visit Keystone is May–June and August–September. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
Webcams near Keystone
The closest live webcam is North Huntingdon Township, 3.4 miles NE of Keystone.
Webcams: Windy.com. Distances in a straight line from Keystone.
Do you know Keystone? Tell us about it
Help other travelers: share what makes Keystone special. We review every message before publishing it.
Map of Keystone, PA
Tap any road on the map to see it in Street View below. Map: © OpenStreetMap contributors.
Keystone Street View
Drag the image to look around and tap the arrows on the ground to move. If it says there is no imagery, tap a nearby street on the map above.
Open in Google Maps ›Towns near Keystone
Other communities near Keystone
Questions about Keystone
Where is Keystone, PA?
Keystone is an unincorporated community in Westmoreland County, Pennsylvania, 0.4 miles SW of Herminie.
What county is Keystone in?
Keystone is in Westmoreland County, Pennsylvania.
What is the ZIP code of Keystone, PA?
The ZIP code for Keystone is 15637.
What is the nearest town to Keystone?
Herminie, 0.4 miles away.
Are there webcams near Keystone?
Yes. The closest is North Huntingdon Township, 3.4 miles away.
What is the hottest month in Keystone?
July, with an average high of 85°F (29°C).
What is the coldest month in Keystone?
January, with an average low of 20°F (-6°C).
How much does it rain in Keystone?
About 42.4 inches (1,076 mm) a year; the wettest month is June.
Does it snow in Keystone?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Keystone?
May–June and August–September, when temperatures are most pleasant and rainy days are fewer.
What climate does Keystone have?
Hot-summer humid continental (Köppen Dfa).
Last updated: