Carrollton, Texas, experiences a humid subtropical climate, marked by hot, humid summers and mild winters. This climate classification, known as ‘Cfa’ in the Köppen system, indicates no dry season and a significant variation in temperatures throughout the year.
Temperature Variations
Throughout the year, Carrollton’s temperatures fluctuate considerably. Daytime highs range from approximately 54.3°F (12.4°C) in the winter months to around 96.3°F (35.7°C) during the summer. Nighttime temperatures also vary, averaging from 38.8°F (3.8°C) in the colder months to 77°F (25°C) in the warmer months.
Precipitation Patterns
Rainfall is fairly evenly distributed across the year, with monthly averages ranging from 1.73 inches (44mm) to 4.02 inches (102mm). May typically sees the highest precipitation, averaging 4.76 inches (121mm), while July tends to be drier, averaging 1.74 inches (44mm).
Humidity and Sunshine
Humidity levels in Carrollton range from 54% to 69%, with slightly higher levels during the warmer months. The city enjoys varying amounts of sunshine throughout the year, with daily averages ranging from 5.6 hours to 11 hours.
Seasonal Highlights
- Spring (March to May): Temperatures gradually rise, with average highs moving from 67.9°F (19.9°C) in March to 83.4°F (28.6°C) in May. This season also brings increased rainfall, particularly in May.
- Summer (June to August): Characterized by hot and humid conditions, with average highs peaking around 95.9°F (35.5°C) in August. Despite the heat, July and August are among the drier months.
- Autumn (September to November): Temperatures gradually decrease, with average highs dropping from 89°F (31.7°C) in September to 66.9°F (19.4°C) in November. Rainfall remains moderate during this period.
- Winter (December to February): Mild conditions prevail, with average highs ranging from 56.3°F (13.5°C) in January to 60.5°F (15.8°C) in February. Snowfall is rare, and precipitation levels are relatively low.
Understanding these patterns can help residents and visitors prepare for Carrollton’s diverse weather conditions throughout the year.

