The average temperature in Birmingham goes up rapidly during the course of spring. In March, the average high temperature is 65 degrees Fahrenheit, and the average low is 42. But by June, the average high is 88 and the average low is 66. The humidity is usually high, around 80 percent in the morning and 60 percent by the afternoon.
Summer in Birmingham is hot. In June, July and August, the average highs are in the upper 80s and low 90s Fahrenheit, and the average lows are in the upper 60s and low 70s. It is also very humid, with morning humidity near 90 percent.
Fall reverses the pattern of spring in Birmingham. In September, the average high is 84 degrees Fahrenheit and the average low is 64, but by November, the average high is 62 and the average low is 41. Humidity remains high, similar to spring.
It sometimes goes below freezing in Birmingham, but usually only at night. From December through February, the average lows are in the mid-30s Fahrenheit and the average highs are in the 50s. Humidity levels are again similar to spring and fall.
