From NOAA NCDC:
Climate Highlights — February
•The February average temperature for the contiguous U.S. was 34.8°F, which was 0.8°F above the 20th century average.
•February temperatures were near-average for a large portion of the Lower 48, including the Northwest Coast, Central and Southern Plains, Midwest, Southeast, and much of the East Coast. Below-average temperatures were reported for the Southwest, while most of the Canadian-border states and parts of the Gulf Coast were warmer than average.
•The nationally-averaged precipitation total during February was 2.00 inches, which was 0.02 inch below the long-term average, masking regional wet and dry extremes.
•The West Coast and Northern Rockies were drier than average. California had its fifth driest February on record, with a precipitation total of 0.57 inch, 3.05 inches below average. Oregon’s precipitation total of 1.20 inches was 2.00 inches below average and marked the seventh driest February for the state.
•Above-average precipitation was observed from the Upper Midwest to the Central Plains, mostly along the eastern periphery of the Plains core drought area, and in the Southeast. Above-average precipitation was also present for parts of New England, where Massachusetts had its eighth wettest February and Rhode Island its third wettest.
•Georgia had its wettest February on record with 9.92 inches of precipitation, 5.42 inches above average. The above-average precipitation drastically improved drought conditions which have been present since the summer of 2010. Neighboring Alabama had its fourth wettest February and South Carolina its seventh wettest.
•Three major winter storms impacted the nation during February, contributing to an above-average monthly snow cover extent, according to data from the Rutgers Global Snow Lab. A Nor’easter hit the East Coast on February 7th-10th, dropping over 30 inches of snow in parts of New England. The storm was rated a Category 3 on the Northeast Snowfall Impact Scale (NESIS), which takes into account snowfall accumulation in the densely populated areas of the northeastern United States. Back-to-back winter storms hit the central U.S. on February 20th-23rd and 25th-28th, bringing heavy snowfall totals and near blizzard conditions from New Mexico to Michigan.
•According to the February 26 U.S. Drought Monitor report, 54.2 percent of the contiguous U.S. was experiencing moderate-to-exceptional drought, smaller than the 57.7 percent at the end of January. Drought conditions continued to plague much of the Great Plains and West.
Climate Highlights — winter season (December 2012 — February 2013)
•The average temperature for the contiguous U.S. during the winter season was 34.3°F, 1.9°F above the 20th century average, marking the 20th warmest winter on record.
•Winter was warmer than average for all states east of the Rockies, with the largest departures from average along the East Coast. Florida, Delaware, and Vermont each had one of their ten warmest winters on record. Conversely, the Southwest was cooler than average, and near-average winter temperatures reported in the Northwest.
•The winter nationally-averaged precipitation total of 7.10 inches was 0.63 inch above the long-term average.
•The above-average temperatures were accompanied by above-average precipitation for most states east of the Rockies. Many states in the Great Lakes region and Gulf Coast — Michigan, Wisconsin, Illinois, Louisiana, Mississippi, Alabama, and Georgia — had winter precipitation totals ranking among their ten wettest. Below-average precipitation occurred from the West Coast through the Northern Plains and Rockies.
•According to data from the Rutgers Global Snow Lab, the winter average snow cover extent for the contiguous U.S. was 1.3 million square miles, which was 127,000 square miles above the 1981-2010 average. This marked the 15th largest seasonal snow cover extent in the 1966-present period of record.
•The U.S. Climate Extremes Index (USCEI), an index that tracks the highest and lowest 10 percent of extremes in temperature, precipitation, drought and tropical cyclones across the contiguous U.S., was slightly below average during the December-February, period. However, the component that examines the spatial extent of drought was more than three times the normal value for the 3-month period.
•Based on NOAA’s Residential Energy Demand Temperature Index, the contiguous U.S. temperature-related energy demand was less than half the 1895-2012 period of record average during winter. This was the 14th smallest such value on record.
Climate Highlights — year-to-date (January — February)
•The first two months of 2013 were warmer than average for the contiguous U.S. with a nationally-averaged temperature of 33.3°F, 1.2°F above average. Near- and above-average temperatures were recorded east of the Rockies. Florida experienced its 11th warmest January-February with a statewide temperature 3.7°F above average. Below-average temperatures were present for much of the West, from California to Colorado. Utah had its 12th coolest January-February, with temperatures 5.3°F below average.
•The January–February precipitation total for the U.S. was 4.36 inches, just 0.12 inch below average. The West and Northeast were both drier than average during the two-month period. California had its driest January–February on record, with average precipitation of 1.75 inches, well below its average of 8.28 inches. Above-average precipitation was present for parts of the Midwest and Gulf Coast, where seven states were top ten wet.