Normally average temperatures in Harlingen all through the month of October is 21. You can expect highs around 28 degrees celsius and a low of 16. We have put some more information below:
| Month | Degrees Celsius |
|---|---|
| Temperature | 21 |
| High Temperature | 28 |
| Low Temperature | 16 |
| Sunshine Per Day | 10 |
Useful Links: Harlingen Weather: Average Weather & Yearly Climate