NASA GISS
http://data.giss.nasa.gov/gistemp/station_data/
(Point at a region and then pick from list of sites, rural and urban)

HADLEY CRU
http://www.cru.uea.ac.uk/cru/data/temperature/

NON-STATION DATA SETS - GLOBAL

NOAA ARL Global and Hemispheric Temperatures from Radiosonde Data
http://cdiac.ornl.gov/trends/temp/angell/angell.html

MSU Satellite Derived Lower Tropospheric Temperatures, Global, Northern and Southern Hemispheres
http://www.nsstc.uah.edu/data/msu/t2lt/uahncdc_lt_5.6.txt

RSS MSU Satellite Derived Lower Tropospheric Temperatures, Latitude Bands
http://data.remss.com/msu/graphics/TLT/time_series/RSS_TS_channel_TLT_Global_Land_And_Sea_v03_3.txt

NASA NSSFC Satellite Derived Daily Global Temperatures
http://discover.itsc.uah.edu/amsutemps/amsutemps.html
The daily satellite temperature web page allows one to pick a layer of the atmosphere and see how globally averaged temperatures for that layer have fluctuated on a daily basis for any (or all) years back to late 1998.  The page is updated every day.  Pick “channel 4” if you want to see the part of the atmosphere where we live – the lower troposphere.  The page can be used to keep track of how the current month is progressing in terms of being above or below normal, in which case you will also want to check the box labeled “20 year average” to see how current temperatures compare to “normal”.  The data used in these daily averages come from the Advanced Microwave Sounding Unit (AMSU) flying on the NOAA-15 polar orbiting satellite.

Lower Tropospheric Temperatures from AMSU By World Region
http://mclean.ch/climate/Tropos_temps.htm