Montgomery has a humid subtropical climate , with short, mild winters, warm springs and autumns, and long, hot, humid summers. The daily average temperature in January is 46.6 °F (8.1 °C), and there are 3.4 days of sub 20 °F (−7 °C) lows; 10 °F (−12 °C) and below is extremely rare. The daily average in July is 81.8 °F (27.7 °C), with highs exceeding 90 °F (32.2 °C) on 86 days per year and 100 °F (37.8 °C) on 3.9. Summer afternoon heat indices, much more often than the actual air temperature, are frequently at or above 100 °F. The diurnal temperature variation tends to be large in spring and autumn. Rainfall is well-distributed throughout the year, though February, March and July are the wettest months, while October is significantly the driest month. Snowfall occurs only during some winters, and even then is usually light. Substantial snowstorms are rare, but do occur approximately once every 10 years. Extremes range from −5 °F (−21 °C) on February 13, 1899 to 107 °F (42 °C) on July 7, 1881.
Thunderstorms bring much of Montgomery’s rainfall. These are common during the summer months but occur throughout the year. Severe thunderstorms – producing large hail and damaging winds in addition to the usual hazards of lightning and heavy rain – can occasionally occur, particularly during the spring. Severe storms also bring a risk of tornadoes. Sometimes, tropical disturbances – some of which strike the Gulf Coast as hurricanes before losing intensity as they move inland – can bring very heavy rains.