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Merwin, MO Weather


Merwin, MO 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 30's.

The warmest month of the year is July with an average maximum temperature of 91.00 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 17.20 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 25 degrees Fahrenheit, and moderate during winter with an average difference of 23 degrees Fahrenheit.

The annual average precipitation at Merwin is 40.46 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is June with an average rainfall of 5.39 Inches.

Normal Climate

Normal Temperatures

(BUTLER Weather station, 17.74 miles from Merwin)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 39.3 46.8 57.7 67.4 76.7 85.3 91.0 89.8 82.2 71.8 55.9 44.3 67.4
Mean °F 28.3 34.6 45.1 54.7 64.8 73.9 79.2 77.1 69.2 58.2 44.3 33.4 55.2
Min °F 17.2 22.4 32.4 41.9 52.9 62.4 67.4 64.4 56.2 44.5 32.6 22.5 43.1

Normal Precipitation

(LA CYGNE Weather station, 10.42 miles from Merwin)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 1.58 1.60 3.10 3.85 5.07 5.39 3.88 3.27 4.27 3.60 3.06 1.79 40.46