No, but with a reservation. It depends on where you look. Recently Climate scientists has found that 'stratospheric water vapor' have changed. "Since 2000, water vapor in the stratosphere decreased by about 10 percent. The reason for the recent decline in water vapor is unknown. The new study used calculations and models to show that the cooling from this change caused surface temperatures to increase about 25 percent more slowly than they would have otherwise, due only to the increases in carbon dioxide and other greenhouse gases." This vapor exist in a little researched narrow altitude region of the stratosphere that exist from about 17 km (56,000 ft) up to 51 km (32 mi; 170,000 ft). Temperature increases with height due to increased absorption of ultraviolet radiation by the ozone layer, which restricts turbulence and mixing. While the temperature may be -60° −60 °C (−76 °F; 213.2 K) at the troposphere, the top of the stratosphere is much warmer, and may be near freezing.
"An increase in stratospheric water vapor in the 1990s likely had the opposite effect of increasing the rate of warming observed during that time by about 30 percent, the authors found. Susan Solomon, Karen Rosenlof, Robert Portmann, and John Daniel, all of the NOAA Earth System Research Laboratory (ESRL) in Boulder, Colo.; Sean Davis and Todd Sanford, NOAA/ESRL and the Cooperative Institute for Research in Environmental Sciences, University of Colorado; and Gian-Kasper Plattner, University of Bern, Switzerland. "
(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fwww.noaanews.noaa.gov%2Fstories2010%2Fimages%2Fcartoon.jpg&hash=94af0522603ec820e6a3b96cbe2156d1)
Right-click on it, and choose 'view image' to view a higher resolution.
Water vapor, even though being our biggest 'green house gas', at its lower levels have a natural short term effect. There will be more vapor as the global warming increase though, heating our oceans and seas. It's an important 'feedback' of heat but no 'forcing' as for example CO2, mostly due to its short cycle, around ten days. As we get more water vapor we will see more clouds, storms, and it will trap more long-wave radiation. Relative humidity might, according to some models, be expected to raise in the Tropics as this happens but decrease at mid latitudes, including the the bottom half of Australia, Chile, Argentina, South Africa. Siberia, Russia, Canada, British Isles and other countries left and right of these places.