National Overview:

• Temperature Highlights - June
• The nationally-averaged temperature for June was much warmer than normal. A deep layer of high pressure dominated much of the eastern United States during the month. The southerly influx of warm air contributed to record high temperatures in many cities.
• The Southeast, South and Central regions experienced their second, fifth and seventh warmest June on record, respectively. Only the Northwest had an average temperature below normal for the month.
• Record-warm June temperatures were observed in Delaware, New Jersey and North Carolina (tied), where each had average temperatures 5 to 6 degrees F above the long-term mean. Many other states ranked in their top ten based on 116 years of data. Only Oregon and Washington had below normal monthly average temperatures for the month.
• Midway through 2010, four New England states (Maine, New Hampshire, Vermont and Rhode Island) have experienced their warmest January-June period on record. Eight other states in the Northeast and Great Lakes areas had a top-ten warm such period. In contrast, Florida observed its seventh-coolest year-to-date on record.
• Persistent warmth made the year's second quarter (April-June) much warmer than normal for every state east of the Mississippi River, and several to its west. Louisiana and ten Atlantic Seaboard states (Maine, New Hampshire, Massachusetts, Delaware, Rhode Island, Connecticut [tied], New Jersey, Maryland, Virginia, and North Carolina) had a record-warm second quarter. In all, twenty states had their warmest or second-warmest such period on record. The warmth in these areas contributed to both the Northeast and Southeast climate regions' warmest April-June period.
• There were significantly cool conditions in the West and Northwest. Oregon (4^th coolest) and Idaho (11^th coolest) had much below normal temperatures for April-June which led to the Northwest climate region's ninth coolest on record.

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