Final answer:
The statement is true as any rainfall can increase humidity and decrease evaporation rates, providing relief during a dry spell.
Step-by-step explanation:
The statement "A little bit of rain will give us some leverage from this dry spell" is true. Rainfall contributes to increasing humidity, which in turn leads to reduced evaporation rates because of the decreased difference in water vapor pressure between the leaf and atmosphere.
Consequently, there is less water loss from both the soil and plant, thereby helping them during a dry spell. This is especially important during drought conditions when stomata close to conserve water, and leaves may be shed to prevent further water loss. Therefore, any amount of rain can be beneficial in providing some temporary relief from dry conditions.