Paul heard that it rained 1.3 inches, while Janet heard that it rained between one and two inches (1 or 2 inches). Considering this, Paul heard that it rained more than 1 inch but less than 1.5 inches.
If we take the lower end of Janet's range (1 inch), then Paul heard more rain than Janet. If we take the higher end of her range (2 inches), then Janet heard more rain than Paul.
Since Janet's heard "one or two inches," the lowest amount (1 inch) is less than 1.3 inches, and the highest amount (2 inches) is greater than 1.3 inches.
Thus, Paul heard that it rained more than the lowest amount Janet heard (1 inch), which means Janet heard that it rained less if you consider her lowest amount of 1 inch.