Guwahati has a clammy subtropical hot summer climate that is placid with dry winters, hot clammy summers and moderate seasonality. According to the Holdrege life zones system of bioclimatic classification Guwahati is situated in or near the subtropical humid forest biome. The general average temperature is 24.2 degrees Celsius (75.6 degrees Fahrenheit). Average monthly temperatures diverge by 11.7 °C (21.1°F). During the winter seasons, time records indicate temperatures by day reach 24.7°C (76.4°F) on average decreasing to 11.4°C (52.5°F) overnight.
During spring time temperatures increases reaching 30.5°C (87°F) frequently in the afternoon with overnight lows of 19.3°C (66.8°F).During summer average high temperatures are 31.9°C (89.4°F) and average low temperatures are 25.2°C (77.3°F). Moving down to the autumn season temperatures decrease achieve average highs of 29.7°C (85.5°F) during the day and lows of 21°C (69.9°F) usually after sunrise. Total annual rainfall averages 1722 mm (67.8 inches) which is equivalent to 1722 Litres/m² (42.24 Gallons/ft²).