Harlingen Texas Climate Data

Monthly Average Climate Data for Harlingen Texas

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January10.2 °C21.5 °C26.92 mm
February12.3 °C23.8 °C30.23 mm
March15.2 °C26.6 °C34.29 mm
April18.6 °C29.7 °C36.32 mm
May21.9 °C32.3 °C59.69 mm
June24.1 °C34.7 °C70.36 mm
July24.6 °C35.2 °C60.45 mm
August24.6 °C35.9 °C52.58 mm
September22.8 °C33.3 °C139.7 mm
October18.9 °C30.7 °C84.58 mm
November14.4 °C25.9 °C42.42 mm
December10.8 °C22.2 °C35.31 mm
Annual18.2 °C29.3 °C672.85 mm

Climate Data for Harlingen Texas

Average First Frost DateJan. 1 - Jan. 10
Average Last Frost DateJan. 21 - Jan. 31
Average Days With FrostFrost Rare
Plant Hardiness Zone - 2023Zone 10a : -1.1°C to 1.7°C
Plant Hardiness Zone - 2012Zone 9b : -3.9°C to -1.1°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate
2024 plantmaps.com