Typical weather in Harlingen right through the month of May is 23 with a normal high in the month being 29 and average daily low being 21 degrees.
| Month | Degrees Celsius |
|---|---|
| Temperature | 23 |
| High Temperature | 29 |
| Low Temperature | 21 |
| Sunshine Per Day | 9 |
Useful Links: Harlingen Weather: Average Weather & Yearly Climate