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Summer 2010

Urban Jungle

The changing natural world at our doorsteps | Illustration and text by Patterson Clark      

July 6, 2010

The hottest month is getting hotter


After the warmest spring on record, Washington area residents can hope to relax and enjoy what climate scientists are predicting to be a "normal" July. The future, however, is looking toasty.

Washington’s average monthly temperatures

Washington D.C.'s monthly temperature averages

Earth's average surface temperature has risen by at least 1.37 degrees since the late 1800s. Climate researchers now expect a further 6.3-degree increase by the end of this century.

Sources: National Oceanic and Atmospheric Administration; staff reports

Washington’s average July temperature

The official temperature for Washington has been measured at varying sites over the years (Reagan National Airport is the current location), so the data shown below can't be used to gauge large-scale climate change, cautions NOAA's Rachel Wilhelm, but "on average, July appears to be getting warmer in the D.C. area."

Washington D.C.'s July temperature averages