| Climate in Pennsylvania & New Jersey | |
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Historic Philadelphia was once the center of American industry. In the 1960s and 1970s much of the industry collapsed and more than a quarter of the populace moved out of the city to the surrounding suburbs. Even with the elimination of the heavy industry, the climate shows evidence of warming, with only one month showing a drop in temperatures. |
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March in Philadelphia shows the fastest rise in high temperatures with the average rise being 0.9'F per decade. The green line at 55'F helps us see this. Before 1970 all of the highs are below 55'F, after 1985 more than half of the highs are above 55'F.
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August shows the low temperatures rising at about 0.9'F per decade. Before 1968 most of the August lows are below 66'F. After 1986 most of the lows are above 1986.
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In October Philadelphia sees its only drop in average temperatures. The highs are level or dropping. But even with the highs dropping slightly the lows are rising at 0.5'F per decade. The green line shows that after 1989 the average October lows never drop below 46'F again.
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Lambertville, New Jersey is a pretty little town on the Delaware River. Full of art and small shops it is popular with the summer tourists. Lambertville has the odd character of being one of the only locations in our study with dropping low temperatures. |
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Even though December high temperatures in Lambertville are rising at 0.8'F per decade, the lows appear to be falling.
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| In September and October both high and low temperatures are falling. For September the drop in the lows appears to be accelerating since 1990. | |
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The decline in the October highs appears to have stopped around 1992.
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