lack of rainfall

基本解释

A drought occurs for a variety of reasons, usually including a lack of rainfall and warm temperatures.
引发干旱有多种原因，通常包括缺少降水和高温。
The main period about 40,25,10 and 4-7 years are found. Based on this, we can forecast the lack of rainfall in Wuhan city in initial stages of this century.
指出武汉市主汛期降水存在40年、25年、10年、4—7年左右的周期振荡，并由降水的周期性推知本世纪初武汉市汛期将进入下一个少雨时段。

No wonder, either, that every so often the private sector makes a mistake, as anyone can: this new water-main or sewer is not built on time, or lack of rainfall means that a reservoir is dry.
ECONOMIST: Third-world water and the private sector
So far the October to January cocoa harvest in the African country has been strong, according to Laurent Pipitone, senior statistician at the International Cocoa Organization (ICCO), "but the second part of the main harvest (January to March) is expected to be relatively poor, " thanks to the lack of rainfall between August and October of 2009.
FORBES: Soft Commodities