Current Conditions

Upper Saint Clair, Pennsylvania

73°F23°C

Clear

Wind

SSW 11 mph17 km/h

Humidity

70%

Cloud Cover

As of Tuesday, October 13, 2026 at 12:17 PM EDT

Today's Outlook

Day

Mostly clear and warm, with a high of 80°F26°C and morning low of 58°F15°C. Breezy from the SSW at 10 to 11 mph16 to 18 km/h.

Night

Mostly clear, with a low around 58°F14°C. Breezy from the SW at 9 to 11 mph15 to 17 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 80°F26°C	Low 58°F14°C	Precip 0 in0 mm—	Cloud 10%	Wind SSW 10 mph16 km/h	Tuesday: Mostly clear and warm, with a high of 80°F26°C and morning low of 58°F15°C. Breezy from the SSW at 10 to 11 mph16 to 18 km/h. Tuesday Night: Mostly clear, with a low around 58°F14°C. Breezy from the SW at 9 to 11 mph15 to 17 km/h.
Showers	High 74°F23°C	Low 62°F17°C	Precip 0.26 in6.5 mm80%	Cloud 62%	Wind WSW 8 mph13 km/h	Wednesday: Mostly cloudy and warm, with a high of 74°F23°C and morning low of 65°F18°C. Breezy from the WSW at 8 mph12 km/h. 80% chance of light rain in the morning. Humid. Wednesday Night: Mostly cloudy, with a low around 62°F17°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 72% chance of showers in the evening.
Drizzle	High 65°F18°C	Low 55°F13°C	Precip 0.07 in1.7 mm27%	Cloud 83%	Wind E 7 mph11 km/h	Thursday: Overcast and mild, with a high of 64°F18°C and morning low of 55°F13°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h. 25% chance of drizzle around midday. Thursday Night: Overcast, with a low around 56°F13°C. Breezy from the E at 7 to 8 mph11 to 14 km/h. 27% chance of drizzle overnight.
Light Rain	High 68°F20°C	Low 51°F10°C	Precip 0.37 in9.4 mm80%	Cloud 77%	Wind WSW 12 mph19 km/h	Friday: Mostly cloudy and warm, with a high of 68°F20°C and morning low of 61°F16°C. Breezy from the WSW at 12 to 13 mph20 to 21 km/h. 80% chance of light rain in the morning. Friday Night: Overcast, with a low around 51°F10°C. Breezy from the WSW at 11 to 12 mph18 to 19 km/h. 65% chance of light rain overnight.
Drizzle	High 50°F10°CFeels 45°F7°C	Low 38°F3°CFeels 32°F0°C	Precip 0.04 in1.1 mm32%	Cloud 48%	Wind NW 10 mph16 km/h	Saturday: Mostly cloudy and cool, with a high of 47°F9°C and morning low of 41°F5°C. Breezy from the NNW at 10 to 11 mph16 to 17 km/h. 10% chance of drizzle. Dry air. Saturday Night: Partly cloudy, with a low around 38°F3°C. Breezy from the NW at 9 to 12 mph15 to 19 km/h. 32% chance of drizzle overnight.
Clear	High 55°F13°C	Low 31°F0°CFeels 25°F-4°C	Precip 0.05 in1.3 mm8%	Cloud 11%	Wind SSE 7 mph11 km/h	Sunday: Mostly clear and mild, with a high of 55°F13°C and morning low of 31°F0°C. Breezy from the SSE at 7 mph11 km/h. Very dry. Sunday Night: Mostly clear, with a low around 31°F0°C. Frost likely. Breezy from the SSE at 7 mph11 km/h.
Freezing Drizzle	High 61°F16°C	Low 37°F3°CFeels 32°F0°C	Precip 0.05 in1.2 mm12%	Cloud 33%	Wind S 7 mph11 km/h	Monday: Partly cloudy and mild, with a high of 61°F16°C and morning low of 37°F3°C. Breezy from the S at 7 mph11 km/h. 12% chance of freezing drizzle in the morning. Dry air. Monday Night: Partly cloudy, with a low around 38°F3°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdayOct 13	80°F26°C	58°F14°C	0 in0 mm· —	10%	Clear	SSW 10 mph16 km/h
DayMostly clear and warm, with a high of 80°F26°C and morning low of 58°F15°C. Breezy from the SSW at 10 to 11 mph16 to 18 km/h. NightMostly clear, with a low around 58°F14°C. Breezy from the SW at 9 to 11 mph15 to 17 km/h.
	WednesdayOct 14	74°F23°C	62°F17°C	0.26 in6.5 mm· 80%	62%	Showers	WSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 65°F18°C. Breezy from the WSW at 8 mph12 km/h. 80% chance of light rain in the morning. Humid. NightMostly cloudy, with a low around 62°F17°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 72% chance of showers in the evening.
	ThursdayOct 15	65°F18°C	55°F13°C	0.07 in1.7 mm· 27%	83%	Drizzle	E 7 mph11 km/h
DayOvercast and mild, with a high of 64°F18°C and morning low of 55°F13°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h. 25% chance of drizzle around midday. NightOvercast, with a low around 56°F13°C. Breezy from the E at 7 to 8 mph11 to 14 km/h. 27% chance of drizzle overnight.
	FridayOct 16	68°F20°C	51°F10°C	0.37 in9.4 mm· 80%	77%	Light Rain	WSW 12 mph19 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 61°F16°C. Breezy from the WSW at 12 to 13 mph20 to 21 km/h. 80% chance of light rain in the morning. NightOvercast, with a low around 51°F10°C. Breezy from the WSW at 11 to 12 mph18 to 19 km/h. 65% chance of light rain overnight.
	SaturdayOct 17	50°F10°C Feels 45°F7°C	38°F3°C Feels 32°F0°C	0.04 in1.1 mm· 32%	48%	Drizzle	NW 10 mph16 km/h
DayMostly cloudy and cool, with a high of 47°F9°C and morning low of 41°F5°C. Breezy from the NNW at 10 to 11 mph16 to 17 km/h. 10% chance of drizzle. Dry air. NightPartly cloudy, with a low around 38°F3°C. Breezy from the NW at 9 to 12 mph15 to 19 km/h. 32% chance of drizzle overnight.
	SundayOct 18	55°F13°C	31°F0°C Feels 25°F-4°C	0.05 in1.3 mm· 8%	11%	Clear	SSE 7 mph11 km/h
DayMostly clear and mild, with a high of 55°F13°C and morning low of 31°F0°C. Breezy from the SSE at 7 mph11 km/h. Very dry. NightMostly clear, with a low around 31°F0°C. Frost likely. Breezy from the SSE at 7 mph11 km/h.
	MondayOct 19	61°F16°C	37°F3°C Feels 32°F0°C	0.05 in1.2 mm· 12%	33%	Freezing Drizzle	S 7 mph11 km/h
DayPartly cloudy and mild, with a high of 61°F16°C and morning low of 37°F3°C. Breezy from the S at 7 mph11 km/h. 12% chance of freezing drizzle in the morning. Dry air. NightPartly cloudy, with a low around 38°F3°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h.
	TuesdayOct 20	64°F18°C	42°F6°C Feels 39°F4°C	0.01 in0.2 mm· 4%	40%	Partly Cloudy	S 5 mph9 km/h
DayPartly cloudy and mild, with a high of 64°F18°C and morning low of 42°F6°C. Light wind from the SSW around 5 mph8 km/h. Dry air. NightPartly cloudy, with a low around 43°F6°C. Light wind from the SSE around 6 mph9 km/h.
	WednesdayOct 21	66°F19°C	43°F6°C Feels 40°F4°C	0 in0.1 mm· 2%	25%	Clear	ESE 5 mph8 km/h
DayPartly cloudy and mild, with a high of 66°F19°C and morning low of 43°F6°C. Light wind from the ESE around 5 mph8 km/h. Dry air. NightMostly clear, with a low around 44°F7°C. Light wind from the ESE around 6 mph9 km/h.
	ThursdayOct 22	66°F19°C	46°F8°C Feels 42°F6°C	0.04 in0.9 mm· 10%	36%	Drizzle	S 7 mph11 km/h
DayPartly cloudy and mild, with a high of 66°F19°C and morning low of 46°F8°C. Light wind from the SSW around 7 mph11 km/h. Dry air. NightPartly cloudy, with a low around 46°F8°C. Breezy from the S at 7 mph11 km/h. 10% chance of drizzle in the evening.
	FridayOct 23	65°F18°C	49°F9°C Feels 46°F8°C	0.04 in1 mm· 12%	48%	Drizzle	SW 7 mph11 km/h
DayPartly cloudy and mild, with a high of 65°F18°C and morning low of 49°F9°C. Breezy from the SW at 7 mph11 km/h. 12% chance of drizzle in the morning. Dry air. NightPartly cloudy, with a low around 49°F9°C. Breezy from the SSW at 7 mph11 km/h. 12% chance of drizzle before dawn.
	SaturdayOct 24	64°F18°C	50°F10°C Feels 47°F8°C	0.09 in2.2 mm· 20%	62%	Drizzle	SSW 7 mph12 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 50°F10°C. Breezy from the SSW at 7 to 8 mph12 to 12 km/h. 20% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 50°F10°C. Breezy from the SSW at 7 to 8 mph12 to 12 km/h. 20% chance of drizzle in the evening.
	SundayOct 25	60°F16°C	50°F10°C Feels 47°F8°C	0.17 in4.3 mm· 27%	70%	Light Rain	WSW 8 mph12 km/h
DayMostly cloudy and mild, with a high of 60°F16°C and morning low of 50°F10°C. Breezy from the WSW at 8 mph13 km/h. 27% chance of light rain in the morning. Dry air. NightMostly cloudy, with a low around 50°F10°C. Breezy from the WSW at 8 mph12 km/h. 25% chance of light rain overnight.
	MondayOct 26	57°F14°C	46°F8°C Feels 42°F6°C	0.11 in2.9 mm· 23%	67%	Showers	WSW 7 mph12 km/h
DayMostly cloudy and mild, with a high of 57°F14°C and morning low of 46°F8°C. Breezy from the WSW at 7 to 8 mph12 to 12 km/h. 23% chance of showers in the morning. Dry air. NightMostly cloudy, with a low around 46°F8°C. Breezy from the W at 7 mph12 km/h. 18% chance of drizzle overnight.
	TuesdayOct 27	55°F13°C	44°F7°C Feels 40°F5°C	0.11 in2.9 mm· 21%	66%	Showers	WSW 7 mph12 km/h
DayMostly cloudy and mild, with a high of 55°F13°C and morning low of 44°F7°C. Breezy from the WSW at 7 to 8 mph12 to 13 km/h. 20% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 44°F7°C. Breezy from the WSW at 7 mph12 km/h. 21% chance of showers overnight.

Nearby Cities

Mount Lebanon2 mi4 km Bethel Park2 mi4 km Baldwin6 mi9 km Pittsburgh9 mi14 km McKeesport12 mi19 km West Mifflin12 mi19 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 40.3359°N, 80.0834°W·Elevation: 335m·Timezone: America/New_York·Population: 19,229