Two great rivers, the Mississippi and the Rock Rivers, surround Rock Island. The Mississippi River runs East-West in the Quad Cities.
 
Averages
Annual average temp - 50 degrees
Normal yearly snowfall - 35 inches
Normal yearly rainfall - 38 inches
Normal wind speed - 10-15 mph

Winter December - February
Average normal temp - 25 degrees Fahrenheit
Average low temp - 16 degrees
Average high temp - 33 degrees
Normal snowfall - 5-10 inches per month

Spring March - May
Average normal temp - 50 degrees
Average low temp - 40 degrees
Average high temp - 61 degrees
Normal rainfall - 3-4 inches per month

Summer June - August
Average normal temp - 73 degrees
Average low temp - 62 degrees
Average high temp - 84 degrees
Normal rainfall - 4-5 inches per month

Autumn September - November
Average normal temp - 52 degrees
Average low temp - 42 degrees
Average high temp - 63 degrees
Normal rainfall - 2-3 inches per month