Mercedes, TX
Climate overview — based on NOAA 1991-2020 normals from WESLACO, TX US.
Year-round temperatures (°F)
Climate summary
Mercedes has an annual average temperature of 75°F with about 25.7 inches of precipitation per year. The warmest month is August (average high 97.3°F), and the coldest is January (average low 50.0°F). September is typically the wettest month (5.64 in) and February the driest (0.95 in).
Best time to visit Mercedes
Full guide →Climate change signal
All-time records →41 of 366 (11.2%) of Mercedes's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1910s | 27 | |
| 1920s | 43 | |
| 1930s | 45 | |
| 1940s | 79 | |
| 1950s | 28 | |
| 1960s | 19 | |
| 1970s | 16 | |
| 1980s | 17 | |
| 1990s | 29 | |
| 2000s | 17 | |
| 2010s | 11 | |
| 2020s | 35 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 71.3°F | 50.0°F | 60.7°F | 1.02 in | — | — |
| February | 75.4°F | 53.5°F | 64.4°F | 0.95 in | — | — |
| March | 80.7°F | 60.1°F | 70.4°F | 1.45 in | — | — |
| April | 86.3°F | 65.1°F | 75.7°F | 1.46 in | — | — |
| May | 90.3°F | 71.5°F | 80.9°F | 2.61 in | — | — |
| June | 94.6°F | 75.5°F | 85.1°F | 2.79 in | — | — |
| July | 95.7°F | 76.5°F | 86.1°F | 2.24 in | — | — |
| August | 97.3°F | 76.4°F | 86.9°F | 1.87 in | — | — |
| September | 92.0°F | 72.8°F | 82.4°F | 5.64 in | — | — |
| October | 87.2°F | 66.0°F | 76.6°F | 2.84 in | — | — |
| November | 79.9°F | 58.4°F | 69.2°F | 1.61 in | — | — |
| December | 72.0°F | 51.6°F | 61.8°F | 1.25 in | — | — |
Climate twins of Mercedes
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).