Average weather in Harlingen throughout the month of April is 20. With the average high being 26 and typical average low being around 16 degrees celsius. We have put some more detail below here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 20 |
| High Temperature | 26 |
| Low Temperature | 16 |
| Sunshine Per Day | 10 |
Useful Links: Harlingen Weather: Average Weather & Yearly Climate