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Northeast Regional Climate Center |
The string of months with above normal temperatures ended in June. Cooler, Canadian air predominated this month, resulting in an average temperature that was 1.6 degrees below the 30-year normal. This was 0.4 degrees cooler than last year and the coolest June since 1992. Temperatures in New Jersey and Rhode Island were exactly normal, while the departures in the remaining states ranged from 0.3 degrees below normal in West Virginia to 3.3 degrees below normal in Maine.
The Northeast received 85% of normal rainfall this month. The regional average of 3.47 inches was 1.55 inches less than the same month in 2003 and the driest since 1999. Connecticut and Rhode Island had the least amount of rain this month, 50 and 51 percent of normal, respectively. Delaware (132% of normal), Maryland (118% of normal) and West Virginia (118% of normal) were the wettest states.
Clashes between warm, moist air to the south and drier, cooler air in the north led to numerous thunderstorm damage reports during June. A cold front passing through New England spawned severe weather in the northern states on the 9th and a stationary front generated storms that spawned weak tornados along with localized flooding in New York, Pennsylvania, Maryland and Delaware on the 17th.
Monthly Summary of State Temperature and Precipitation Averages.
