This month was Burlington's 4th rainiest September on record, with 6.38 total inches of rainfall as of 4:54am on Sept. 28, the National Weather Service reported. The agency's records date back to 1884.
The last time a September was this rainy in Burlington was 23 years ago.
With mostly sunny conditions predicted for Sept. 29 and 30, it's unlikely that this month will surpass the number three record of 6.87 inches set in September 1938, according to the National Weather Service.
This year saw the wettest-ever Sept. 13 and Sept. 19 on record, with 2.56 inches and 1.71 inches of rain respectively. In just two hours on Sept. 13, the Burlington airport saw two inches of rainfall — beating out the previous record of 1.88 inches on Sept. 13, 1925, according to the National Weather Service.
This month had an unusually high amount of rain, given that there was no tropical cyclone or other widespread swath of precipitation, said meteorologist Robert Haynes of the National Weather Service Burlington. For example, the number one rainiest September in Burlington by far (with 10.26 total inches of rain) was during Tropical Storm Floyd in 1999. The fact that this September had so much precipitation from mostly just isolated thunderstorms is unusual, Haynes said.
Due to climate change, days with more than one inch of rain are nearly twice as common in Vermont today than they were 50 years ago, according to the state Department of Health.
As the climate continues to change, periods of heavy rainfall are expected to become more common in Vermont, according to the National Oceanic and Atmospheric Administration.
Since 1958, precipitation from extremely heavy storms has increased by 70 percent across the Northeast, according to the Environmental Protection Agency.
This article originally appeared on Burlington Free Press: September 2022 was rainiest in Burlington since 1999