The average rate of decrease is 20°F / 4 hours = 5°F per hour.

Sun, 19 Apr 2026 19:49:40 +0000

Understanding the Average Rate of Temperature Decrease: 20°F Over 4 Hours Equals 5°F Per Hour When tracking weather patterns or analyzing environmental changes, one essential calculation helps quantify how quickly temperatures drop: the average rate of decrease. A common example is understanding how quickly temperatures fall—such as a 20°F drop over 4 hours. This article explains the math, practical implications, and why recognizing a 5°F-per-hour decline matters in meteorology, agriculture, and daily life. --- ### What Does 20°F Over 4 Hours Mean?