10-day forecast for Upper St. Clair, PA: 53° to 87°, with precipitation expected on 5 days. The table below breaks each day into morning, afternoon, evening and overnight.
85°
Best day: Sunday, August 9
84° · 0.46 in
Worst day: Tuesday, August 11
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0985° / 67°0.02
Morning68°feels 69°
Afternoon81°feels 81°
Evening77°feels 78°
Overnight71°feels 72°
85 °
Upper St. Clair, Sunday, 9 August
Light rain. High 85°, low 67°.
Pressure30.06 inHg
Wind5.3 mph SW
Humidity51%
Visibility6.2 mi
Dew point61°
Mon, 1087° / 67°0.33
Morning67°feels 68°
Afternoon79°feels 79°
Evening72°feels 73°
Overnight70°feels 71°
87 °
Upper St. Clair, Monday, 10 August
Rain. High 87°, low 67°.
Pressure30.03 inHg
Wind9.3 mph S
Humidity85%
Visibility6.2 mi
Dew point71°
Tue, 1184° / 65°0.46
Morning67°feels 67°
Afternoon83°feels 87°
Evening66°feels 67°
Overnight66°feels 67°
84 °
Upper St. Clair, Tuesday, 11 August
Rain. High 84°, low 65°.
Pressure29.97 inHg
Wind8.1 mph W
Humidity66%
Visibility6.2 mi
Dew point68°
Wed, 1272° / 65°0.16
Morning67°feels 68°
Afternoon71°feels 72°
Evening72°feels 73°
Overnight65°feels 66°
72 °
Upper St. Clair, Wednesday, 12 August
Light rain. High 72°, low 65°.
Pressure29.83 inHg
Wind8.2 mph SW
Humidity93%
Visibility6.2 mi
Dew point69°
Thu, 1375° / 65°0.09
Morning69°feels 70°
Afternoon74°feels 74°
Evening67°feels 67°
Overnight65°feels 65°
75 °
Upper St. Clair, Thursday, 13 August
Light rain. High 75°, low 65°.
Pressure29.88 inHg
Wind9 mph W
Humidity71%
Visibility—
Dew point64°
Fri, 1474° / 58°0
Morning64°feels 63°
Afternoon72°feels 71°
Evening64°feels 63°
Overnight58°feels 57°
74 °
Upper St. Clair, Friday, 14 August
Clear. High 74°, low 58°.
Pressure30.03 inHg
Wind7.8 mph N
Humidity43%
Visibility—
Dew point48°
Sat, 1573° / 53°0
Morning61°feels 60°
Afternoon71°feels 70°
Evening63°feels 62°
Overnight58°feels 57°
73 °
Upper St. Clair, Saturday, 15 August
Partly cloudy. High 73°, low 53°.
Pressure30.27 inHg
Wind7.7 mph N
Humidity42%
Visibility—
Dew point46°
Sun, 1676° / 54°0
Morning63°feels 62°
Afternoon74°feels 74°
Evening67°feels 66°
Overnight63°feels 62°
76 °
Upper St. Clair, Sunday, 16 August
Partly cloudy. High 76°, low 54°.
Pressure30.27 inHg
Wind5.1 mph E
Humidity41%
Visibility—
Dew point48°
Mon, 1781° / 58°0
Morning66°feels 66°
Afternoon78°feels 78°
Evening71°feels 71°
Overnight66°feels 66°
81 °
Upper St. Clair, Monday, 17 August
Overcast. High 81°, low 58°.
Pressure30.12 inHg
Wind6 mph SW
Humidity44%
Visibility—
Dew point53°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Upper St. Clair, PA around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.