ROCHESTER, N.Y. – Recently, summer-like weather arrived a bit early across the Rochester area, with temperatures climbing into the upper 80s and even approaching 90 degrees. After experiencing that kind of heat in May, many people naturally begin wondering what the upcoming summer season may bring.
It also raises a larger question: are summers in Rochester becoming warmer over time? Long-term temperature records suggest the answer is yes.
Weather data dating back to 1970 shows a noticeable increase in the number of above-normal temperature days across the Rochester region. While temperatures still fluctuate significantly from year to year, the overall trend becomes much clearer when the data is averaged over several decades.
On average, Rochester now experiences roughly 10 additional days per year with above-normal temperatures compared to the early 1970s.
That trend also aligns closely with rising average temperatures. Although individual summers still vary, long-term climate records indicate that Rochester’s average temperatures have increased by approximately 1.5 degrees over the past five decades.
Western New York is far from alone in seeing this warming trend.
Across much of the United States, long-term temperature records show warmer conditions becoming increasingly common. According to Climate Central, 91 percent of 243 major U.S. cities have recorded warming trends since 1970. Only a small portion of counties, mainly across parts of the central United States, have avoided significant warming during that period.
Warmer summers can have several impacts beyond simply making conditions feel more uncomfortable. Increased heat contributes to higher energy demand as air conditioning usage rises. It can also elevate the risk of heat-related illnesses, particularly during extended periods of hot and humid weather.
In some regions of the country, hotter and drier conditions have also contributed to an increased threat of wildfires. While western New York does not face the same wildfire risk seen in the western United States, periods of heat and dry weather can still stress crops and lawns.
Despite these warming trends, Rochester’s proximity to Lake Ontario continues to moderate some of the region’s summer extremes. Lake breezes often help keep shoreline communities cooler than inland locations during the hottest part of the season.
Still, the long-term data shows that summers across western New York are gradually becoming warmer, with hotter days occurring more frequently than they did just a few decades ago.
First Alert Weather In-Depth: Rochester’s summers have changed since 1970 WHEC.com.
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