As I said the monsoon migrated itself, so there was less rain in the Sahara.

就像我说的，季风会自己转移，所以撒哈拉的雨水就少了。

youdao

Then the cycle continues, less rain, drier soil, less vegetation, fewer clouds, less rain etc.

然后这个循环继续下去，雨水减少，土壤变干，植被减少，云层减少，雨水再减少等等。

youdao

At the current rate of decline, many of the rain forest animals could become extinct in less than 10 years.

按照目前的下降速度，许多雨林动物不到十年就会绝种。

《柯林斯英汉双解大词典》

Following a second quarter that was the wettest on record, the Olympics period in central London brought slightly less rain than normal, a spokeswoman for the Met Office, the U.K. weather agency, said Sunday.

WSJ: Social Media

In marked contrast, some places across the eastern half of England recorded less than 1 mm of rain in the whole month.

BBC: Weather - UK Review - April 2011

The Los Angeles area has received less than 2 inches of rain since January, making the bone-dry region "definitely ripe for these fires, " said William Patzert, a NASA climatologist.

CNN: Fire rages in California even as winds die down