Distant from stars like our sun, the temperature of space is just 2.73 Kelvins. It's pretty easy to work out the temperature for any given location in space -- just add up the effect of any nearby stars, whose radiation decreases as the square of distance, and add the background temperature of space itself, caused by the Big Bang afterglow.
What this means is that, unless you're close to a star, it is very, very cold. Even at Pluto's relatively nearby location, the average temperature is only 33 Kelvins.
Lots of infrared too, though.