Current Conditions

Upper Saint Clair, Pennsylvania

69°F20°C

Drizzle

Wind

S 6 mph10 km/h

Humidity

83%

Cloud Cover

81%

As of Wednesday, September 9, 2026 at 1:40 AM EDT

Today's Outlook

Day

Mostly cloudy and hot, with a high of 87°F31°C and morning low of 70°F21°C. Breezy from the SW at 9 to 10 mph15 to 17 km/h. Humid.

Night

Mostly cloudy, with a low around 68°F20°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. 31% chance of drizzle overnight.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Drizzle	High 87°F31°CFeels 91°F33°C	Low 68°F20°C	Precip 0.03 in0.7 mm31%	Cloud 66%	Wind SSW 8 mph13 km/h	Wednesday: Mostly cloudy and hot, with a high of 87°F31°C and morning low of 70°F21°C. Breezy from the SW at 9 to 10 mph15 to 17 km/h. Humid. Wednesday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. 31% chance of drizzle overnight.
Rain	High 76°F24°C	Low 69°F21°C	Precip 0.48 in12.3 mm93%	Cloud 90%	Wind WSW 5 mph8 km/h	Thursday: Overcast and warm, with a high of 76°F24°C. Light wind from the WSW around 5 mph8 km/h. 84% chance of rain throughout the day. Heavy, humid air. Thursday Night: Overcast, with a low around 69°F21°C. Light wind from the WSW around 5 mph8 km/h. 93% chance of rain throughout the night.
Drizzle	High 79°F26°C	Low 63°F17°C	Precip 0.01 in0.2 mm12%	Cloud 72%	Wind NE 4 mph6 km/h	Friday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 63°F17°C. Light wind from the NE around 3 mph5 km/h. Friday Night: Mostly cloudy, with a low around 64°F18°C. Light wind from the NE around 5 mph8 km/h. 12% chance of drizzle overnight.
Light Rain	High 78°F26°C	Low 64°F18°C	Precip 0.39 in9.8 mm79%	Cloud 79%	Wind SSE 5 mph9 km/h	Saturday: Overcast and warm, with a high of 78°F26°C and morning low of 66°F19°C. Light wind from the S around 6 mph9 km/h. 79% chance of light rain throughout the day. Humid. Saturday Night: Mostly cloudy, with a low around 64°F18°C. Light wind from the SE around 5 mph8 km/h. 70% chance of light rain throughout the night.
Showers	High 82°F28°CFeels 85°F29°C	Low 67°F20°C	Precip 0.18 in4.5 mm48%	Cloud 57%	Wind WSW 6 mph9 km/h	Sunday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 69°F20°C. Breezy from the WSW at 6 to 7 mph10 to 12 km/h. 48% chance of showers throughout the day. Humid. Sunday Night: Mostly cloudy, with a low around 67°F20°C. Light wind from the W around 5 mph9 km/h. 48% chance of showers throughout the night.
Partly Cloudy	High 77°F25°C	Low 60°F15°C	Precip 0.01 in0.2 mm4%	Cloud 44%	Wind NNE 5 mph7 km/h	Monday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 60°F15°C. Light wind from the N around 4 mph7 km/h. Monday Night: Partly cloudy, with a low around 61°F16°C. Light wind from the NE around 5 mph8 km/h.
Drizzle	High 86°F30°C	Low 60°F16°C	Precip 0.02 in0.6 mm13%	Cloud 39%	Wind S 7 mph11 km/h	Tuesday: Partly cloudy and warm, with a high of 86°F30°C and morning low of 62°F17°C. Breezy from the S at 7 to 8 mph12 to 13 km/h. Tuesday Night: Partly cloudy, with a low around 60°F16°C. Breezy from the SSE at 7 mph11 km/h. 13% chance of drizzle in the evening.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	87°F31°C Feels 91°F33°C	68°F20°C	0.03 in0.7 mm· 31%	66%	Drizzle	SSW 8 mph13 km/h
DayMostly cloudy and hot, with a high of 87°F31°C and morning low of 70°F21°C. Breezy from the SW at 9 to 10 mph15 to 17 km/h. Humid. NightMostly cloudy, with a low around 68°F20°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. 31% chance of drizzle overnight.
	ThursdaySep 10	76°F24°C	69°F21°C	0.48 in12.3 mm· 93%	90%	Rain	WSW 5 mph8 km/h
DayOvercast and warm, with a high of 76°F24°C. Light wind from the WSW around 5 mph8 km/h. 84% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 69°F21°C. Light wind from the WSW around 5 mph8 km/h. 93% chance of rain throughout the night.
	FridaySep 11	79°F26°C	63°F17°C	0.01 in0.2 mm· 12%	72%	Drizzle	NE 4 mph6 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 63°F17°C. Light wind from the NE around 3 mph5 km/h. NightMostly cloudy, with a low around 64°F18°C. Light wind from the NE around 5 mph8 km/h. 12% chance of drizzle overnight.
	SaturdaySep 12	78°F26°C	64°F18°C	0.39 in9.8 mm· 79%	79%	Light Rain	SSE 5 mph9 km/h
DayOvercast and warm, with a high of 78°F26°C and morning low of 66°F19°C. Light wind from the S around 6 mph9 km/h. 79% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 64°F18°C. Light wind from the SE around 5 mph8 km/h. 70% chance of light rain throughout the night.
	SundaySep 13	82°F28°C Feels 85°F29°C	67°F20°C	0.18 in4.5 mm· 48%	57%	Showers	WSW 6 mph9 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 69°F20°C. Breezy from the WSW at 6 to 7 mph10 to 12 km/h. 48% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 67°F20°C. Light wind from the W around 5 mph9 km/h. 48% chance of showers throughout the night.
	MondaySep 14	77°F25°C	60°F15°C	0.01 in0.2 mm· 4%	44%	Partly Cloudy	NNE 5 mph7 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 60°F15°C. Light wind from the N around 4 mph7 km/h. NightPartly cloudy, with a low around 61°F16°C. Light wind from the NE around 5 mph8 km/h.
	TuesdaySep 15	86°F30°C	60°F16°C	0.02 in0.6 mm· 13%	39%	Drizzle	S 7 mph11 km/h
DayPartly cloudy and warm, with a high of 86°F30°C and morning low of 62°F17°C. Breezy from the S at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 60°F16°C. Breezy from the SSE at 7 mph11 km/h. 13% chance of drizzle in the evening.
	WednesdaySep 16	86°F30°C Feels 89°F32°C	69°F21°C	0.11 in2.7 mm· 28%	52%	Showers	SSW 6 mph9 km/h
DayMostly cloudy and warm, with a high of 86°F30°C and morning low of 69°F21°C. Light wind from the SW around 5 mph9 km/h. 28% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 69°F21°C. Breezy from the SSW at 6 to 7 mph9 to 11 km/h. 24% chance of showers throughout the night.
	ThursdaySep 17	85°F30°C Feels 88°F31°C	68°F20°C	0.1 in2.6 mm· 26%	46%	Drizzle	SSW 5 mph9 km/h
DayPartly cloudy and warm, with a high of 85°F30°C and morning low of 68°F20°C. Light wind from the SW around 6 mph9 km/h. 26% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 68°F20°C. Light wind from the SSW around 5 mph9 km/h. 19% chance of drizzle throughout the night.
	FridaySep 18	83°F28°C	68°F20°C	0.16 in4.1 mm· 28%	46%	Showers	SW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 83°F28°C and morning low of 68°F20°C. Breezy from the WSW at 7 mph11 km/h. 28% chance of showers throughout the day. NightPartly cloudy, with a low around 68°F20°C. Light wind from the SW around 6 mph10 km/h. 19% chance of showers throughout the night.
	SaturdaySep 19	76°F25°C	63°F17°C	0.17 in4.2 mm· 28%	53%	Showers	W 6 mph10 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 63°F17°C. Breezy from the W at 7 to 8 mph11 to 12 km/h. 28% chance of showers throughout the day. NightPartly cloudy, with a low around 63°F17°C. Light wind from the W around 6 mph10 km/h. 22% chance of showers throughout the night.
	SundaySep 20	71°F22°C	58°F14°C	0.19 in4.9 mm· 22%	57%	Showers	NW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 58°F14°C. Light wind from the NW around 6 mph10 km/h. 22% chance of showers throughout the day. NightMostly cloudy, with a low around 58°F15°C. Light wind from the NNW around 6 mph10 km/h. 20% chance of showers throughout the night.
	MondaySep 21	69°F21°C	54°F12°C	0.09 in2.4 mm· 16%	56%	Drizzle	NE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 54°F12°C. Light wind from the NNE around 6 mph10 km/h. 16% chance of drizzle throughout the day. NightMostly cloudy, with a low around 54°F12°C. Light wind from the NE around 6 mph10 km/h. 14% chance of drizzle throughout the night.
	TuesdaySep 22	69°F21°C	54°F12°C	0.15 in3.9 mm· 18%	59%	Showers	ESE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 54°F12°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h. 18% chance of showers throughout the day. NightMostly cloudy, with a low around 54°F12°C. Light wind from the ESE around 6 mph10 km/h. 17% chance of showers throughout the night.
	WednesdaySep 23	71°F22°C	54°F12°C	0.15 in3.7 mm· 21%	60%	Showers	SE 6 mph9 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 54°F12°C. Light wind from the SSE around 6 mph9 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 54°F12°C. Light wind from the SE around 6 mph9 km/h. 21% chance of showers throughout the night.

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

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