Canadian Wildfire Smoke Could Cause Hazy Conditions In PA

After a wet and chilly May, temperatures will warm up this week with highs in the low 90s predicted. There is also the threat of haze in the atmosphere due to smoke from Canadian wildfires.

"Fair and tranquil weather will dominate through at least midweek with a general warming trend in temperatures," the National Weather Service said. The heat will peak Thursday, when a high near 90 degrees is expected.

Additionally, smoke from Canadian wildfires is spreading across the eastern US. In the Philadelphia region, the smoke is not expected to impact air quality. "The smoky skies will likely linger at times into early next week," the National Weather Service said.

During the spring and summer of 2023, smoke from large wildfires in Quebec and Ontario was significant across the region, and caused multiple days of air quality warnings.

That threat is not expected at this time.

Noticing a haziness to the sky today? That is due to smoke from Canadian wildfires spreading across the eastern US. In our region, the smoke is aloft only and will not impact air quality. The smoky skies will likely linger at times into early next week. #PAwx #NJwx #DEwx #MDwx pic.twitter.com/cp452m6wGt
— NWS Mount Holly (@NWS_MountHolly) June 1, 2025

"Most of the time, the smoke will be high-flying and dim the sun, leading to vivid sunrises and sunsets and causing a hazy appearance to the sky overhead," AccuWeather Meteorologist Brandon Buckingham said.

"However, there will be episodes where the smoke can reach the lower levels of the atmosphere and affect visibility and air quality," Buckingham added. "That could be a safety concern for travel in extreme cases and pose health problems for some individuals with respiratory issues."

Here's the latest forecast:

Today: Sunny, with a high near 74. Northwest wind around 5 mph.

Tonight: Partly cloudy, with a low around 55. West wind around 5 mph becoming calm.

Tuesday: Sunny, with a high near 83. Calm wind.

Tuesday Night: Clear, with a low around 60. South wind around 5 mph becoming calm.

Wednesday: Sunny, with a high near 88. Light south wind becoming southwest 5 to 10 mph in the afternoon.

Wednesday Night: Clear, with a low around 65.

Thursday: Mostly sunny, with a high near 90.

Thursday Night: Partly cloudy, with a low around 69.

Friday: A chance of showers after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 40%.

Friday Night: A chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.

Saturday: Showers likely. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.