Start of Summer

June 1-15 average temperatures ranged from 4°F below normal to 6°F above normal.

Average temperatures during the first half of June ranged from 4°F below normal in interior areas such as western Pennsylvania to 6°F above normal in locations closer to the coast such as southern Maine. At the Northeast’s 35 major climate sites, June 1-15 average temperatures ranged from 0.7°F cooler than normal in Charleston, WV, to 4.2°F warmer than normal in Hartford, CT. Twenty-nine of the major climate sites were warmer than normal, with this June 1-15 period ranking among the 20 warmest on record for 16 of the sites.

Outlooks from NOAA’s Climate Prediction Center indicate that the rest of June is expected to warmer than normal, as well, with a significant heat wave forecast for the June 17-22 period. For the latest forecast, visit your local National Weather Service office website. Additionally, the NWS HeatRisk map shows areas where there is the potential for heat-related impacts over the next seven days.

This June 1-15 period ranked among the 20 warmest on record for 16 major climate sites.

June 1-15 precipitation ranged from less than 25% of normal to 200% of normal.

Much of the Northeast was drier than normal during the first half of June, with the driest locations like southern Maryland and parts of Connecticut seeing less than 25% of normal precipitation. This lack of precipitation contributed to an expansion of abnormal dryness in the Northeast. Conversely, a few areas such as northern Delaware, northern Maine, and northern New York were wetter, seeing up to 200% of normal precipitation. June 1-15 precipitation at the region’s 35 major climate sites ranged from 13% of normal at Dulles Airport, VA, to 146% of normal in Wilmington, DE, with 30 of the sites being drier than normal. This first half of June ranked among the 20 driest on record for nine major climate sites but was the 17th wettest for Caribou, ME.

This June 1-15 period ranked among the 20 driest on record for nine major climate sites but was the 17th wettest for Caribou, ME.