Temperature for March
In Harlingen, TX during March the average high temperature is 80.2°F. The hottest day on record was March 28, 1984 when the temperature hit 102.9°F.
Precipitation for March
In March the average monthly rainfall in Harlingen, TX is 0.39 inches with rain usually falling on between 5 and 6 days. 1943 was the driest March with only 0.00 inches of rain falling, and 1999 was the wettest March with 3.97 inches of rain. The wettest single day in March was 28 March 1999 when 2.08 inches of rain fell.
In March there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in March.