This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A shower or fall of rain.

n. The quantity of water, expressed in inches, precipitated as rain, snow, hail, or sleet in a specified area and time interval.

n. the amount of rain that falls on a single occasion

n. A fall or descent of rain; the water, or amount of water, that falls in rain.

n. A falling of rain; a shower.

n. The precipitation of water from clouds; the water, or the amount of water, coming down as rain. The rainfall is measured by means of the pluviometer or rain-gage. The average rainfall of a district includes the snow, if any, reduced to its equivalent in water.

n. water falling in drops from vapor condensed in the atmosphere

"As the IPCC report made clear, many of the models disagree even on the sign of the change in rainfall over much of the globe, especially for winter projections."

precipitation    downfall   

rainfall chart    zone of maximum rainfall   

rain shower    mizzle    drizzle    monsoon    soaker    rainstorm    deluge    torrent    waterspout    cloud-burst   

precipitation    downpour    humidity    drought    thunderstorm    stipend    moisture    irrigation    drainage    volatility