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Relative Humidity in Des Moines, Iowa, Usa

The average annual relative humidity is 59.5% and average monthly relative humidity ranges from 52% in October to 72% in January.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Relative Humidity (%)	72	69	62	53	54	57	53	57	53	52	62	70	59.5
Average Dew Point Temperature °C ( °F)	-10.7 (12.7)	-8.4 (16.9)	-3.2 (26.2)	1.3 (34.4)	7.4 (45.4)	13.2 (55.7)	14.6 (58.2)	14.3 (57.8)	8.7 (47.6)	2.4 (36.3)	-2.4 (27.7)	-8.3 (17)	2.4 (36.3)
Interpretation	A bit dry	A bit dry	A bit dry	A bit dry	A bit dry	Comfort- able	Comfort- able	Comfort- able	A bit dry	A bit dry	A bit dry	A bit dry	A bit dry

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