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West Branch, IA Weather


West Branch, IA climate is warm during summer when temperatures tend to be in the 70's and very cold during winter when temperatures tend to be in the 20's.

The warmest month of the year is July with an average maximum temperature of 9.99 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 9.99 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 21 degrees Fahrenheit, and fairly limited during winter with an average difference of 17 degrees Fahrenheit.

The annual average precipitation at West Branch is 9.99 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is August with an average rainfall of 4.89 Inches.

Weather Data

Normal Climate

Normal Temperatures

(IOWA CITY Weather station, 9.60 miles from West Branch)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 30.0 36.5 49.2 63.3 74.7 83.8 87.5 85.1 77.8 65.9 48.3 34.4 61.4
Mean °F 21.7 27.9 39.6 52.1 63.4 72.8 76.9 74.6 66.7 54.9 39.8 26.8 51.4
Min °F 13.4 19.3 29.9 40.8 52.1 61.8 66.3 64.1 55.5 43.8 31.3 19.1 41.5

Normal Precipitation

(IOWA CITY Weather station, 9.60 miles from West Branch)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 1.10 1.15 2.36 3.75 4.52 4.82 4.54 4.89 3.43 2.78 2.41 1.52 9.99