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Canonsburg, PA Weather
Current conditions
Observed at Washington County Airport · 51 min ago
Forecast
10-day-
Saturday Night
Mostly clear, with a low around 36.
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Sunday
Sunny, with a high near 67.
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Sunday Night
Partly cloudy, with a low around 41.
National Weather Service forecast updated 4 days ago.
Hourly
Hourly forecast- Now41°
- 3 AM40°
- 4 AM39°
- 5 AM38°
- 6 AM37°
- 7 AM36°
- 8 AM37°
- 9 AM42°
- 10 AM48°
- 11 AM54°
- 12 PM58°
- 1 PM62°
- 2 PM64°
- 3 PM66°
- 4 PM66°
- 5 PM66°
- 6 PM63°
- 7 PM59°
- 8 PM55°
- 9 PM52°
- 10 PM49°
- 11 PM47°
- Mon12 AM46°
- 1 AM46°
10-day forecast
Details- TonightOct 20Mostly Clear then Patchy Fog37°
- WedOct 21Patchy Fog then Sunny36°67°
- ThuOct 22Patchy Fog then Mostly Sunny42°63°
- FriOct 23Sunny33°63°
- SatOct 24Sunny36°64°
- TodayOct 25Sunny41°67°
- MonOct 26Mostly Sunny45°68°
- TueOct 27Partly Sunny60°
- WedOct 28Rain0.15 in39°51°
- ThuOct 29Mostly sunny34°52°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Canonsburg
More weather news-
Old Farmer’s Almanac Forecasts Rain, Snow Showers for Northeast on ThanksgivingWith autumnal foliage colors and cooler temperatures settling in across the Philadelphia region, it’s time to start our attentions to the upcoming holiday and winter season. Take a look at… The Almanac's Thanksgiving…
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AccuWeather's Pittsburgh Winter Forecast Revealed: Warm/WetWith October already over halfway over, the colder weather will soon be here. For the next week or so, Pittsburgh is expecting sunshine and highs in the low to mid 60s through at least this weekend. But how is winter…
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It's going to be a dry week without rain throughout the Pittsburgh areaOctober 19, 2026 / 7:13 AM EDT / CBS Pittsburgh It's going to be a dry week without rain in the Pittsburgh area. Any alert days ahead? Nope. There are freeze warnings in place for a couple of counties this morning…
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Beautiful fall weather continues on Tuesday, with a cool start to the dayWPXI Beautiful fall weather continues on Tuesday, with a cool start to the day PITTSBURGH â Picture-perfect fall weather continues with crisp, cool nights and warmer, sun-filled days. Temperatures will swing more than…
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Another frosty night in the Pittsburgh areaWPXI PITTSBURGH — It will be another frosty night across the entire area, with temperatures dropping back down into the 30s tonight. A Frost Advisory is in effect for much of the area from Allegheny County south and…
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Sunday begins with colder temperatures in Pittsburgh, but sunshine and seasonable weather followsOctober 18, 2026 / 7:32 AM EDT / CBS Pittsburgh We are in First Alert Weather mode until 9 a.m. with a Freeze Warning for everyone. Some areas dipped into the upper 20s! Average first fall frost for Pittsburgh is…
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Pittsburgh: A stunning stretch of fall weatherIt's only sunshine and seasonal temperatures this week. The Freeze Warning is set to expire at 9 a.m. Frosty mornings and mild afternoons with sunshine are in our future. It is shaping up to be a glorious fall week. A…
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Coldest morning since spring gives way to warmer, dry weekOnce the sun rises, weâll warm up in a hurry with highs pushing into the low 60s. Coldest morning since spring gives way to warmer, dry week PITTSBURGH â Itâs the coldest morning since spring with temperatures…
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New winter forecast reveals complete shift in snow predictions for 2027By CHRIS MELORE, US DEPUTY SCIENCE EDITOR A new forecast model predicts that the impact of a historic El Niño will completely flip America's winter, bringing snow to some areas that saw next to none last year…
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Freeze Watch Upgraded to Warning for Almost All of Pennsylvania as Conditions WorsenFreeze Warnings are now in effect for most of Pennsylvania from 1 a.m. to 9 a.m. EDT Sunday, with lows between 25 and 30 degrees expected in central Pennsylvania. The earlier Freeze Watches have been upgraded to…
Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- SunModerate (75)
- MonModerate (70)
- TueModerate
Mon Valley Area, PA reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyPittsburgh Allegheny County Ap, records since 1935. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Pittsburgh 26 km
- Mount Lebanon 16 km
- Bethel Park 14 km
- Monroeville 38 km
- Cranberry Township 47 km
- Wheeling 50 km
- Plum 46 km
- Allison Park 38 km
- Murrysville 45 km
- West Mifflin 29 km
- Baldwin 20 km
- McKeesport 29 km
Forecasters' discussion
From the National Weather Service office in PBZ, issued 5 hrs ago
What Has Changed
No changes to the forecast package or messaging.
Key Messages
1) Above normal temperature with dry weather highly likely until at least late next week.
Discussion
KEY MESSAGE 1... Keen readers may note the lack of notably different discussions recently and this latest discussion offers little to change that trend. The combination of surface high pressure and ridging aloft over a multi-day period (with very high confidence) means the weather story is a bit monotonous. So continue to enjoy above normal temperature (with large diurnal swings), light winds, abundant sunshine and dry weather.
More variance in the upper level pattern from ensemble models starting around Thursday through the following Monday (November 2nd) suggests some topics of discussion but with little confidence at this point. This includes weak shortwave movement north of the region Thursday into Friday morning (offering 30% or less probabilities for measurable rain mainly in NW PA); unlikely waves Friday into Saturday (offering less than 20% measurable rain probabilities); and the potential strong trough passage Sunday into Monday (higher likelihood of rain but timing of its arrival has slowly be inching later). Clarity will arrive eventually but for now, nothing merits further discussion.
Aviation
High confidence VFR continues through much of next week. Light E/SE winds are expected through Sunday. River valley fog may impact isolated sites with IFR to LIFR visibility between 11Z and 13Z Sunday morning before diurnal mixing after sunrise.
Outlook... Outside of any morning river valley fog, VFR is highly likely through Thursday under high pressure.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.