"Overall, the combined global land and ocean surface temperature anomaly for April 2010 was the warmest April on record since records began in 1880. The previous record was set in 1998. The combined global land and ocean temperature anomaly was 0.76°C (1.37°F) above the 20th century average."
Also of note,
"The combined global land and ocean surface temperature for January–April period was the warmest January-April period on record."
for details, please refer to:
http://www.ncdc.noaa.gov/sotc/?report=global