| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 22.3° | 11.3° | 25.2mm | 6.6 | 87 |
| February | 23.8° | 13.1° | 23.4mm | 5.2 | 90 |
| March | 26.5° | 16.3° | 36.1mm | 5.3 | 89 |
| April | 29.4° | 19.5° | 33.1mm | 4.6 | 81 |
| May | 32.1° | 23° | 58.9mm | 4.6 | 70 |
| June | 34.1° | 24.8° | 67.4mm | 5.7 | 60 |
| July | 34.5° | 25.1° | 64.2mm | 5.3 | 59 |
| August | 35.2° | 25.1° | 56.6mm | 6.3 | 55 |
| September | 33.1° | 23.5° | 149.5mm | 11.2 | 53 |
| October | 30.3° | 19.9° | 100mm | 7.7 | 71 |
| November | 26.4° | 15.7° | 49.9mm | 7.1 | 86 |
| December | 23.2° | 12.3° | 31.3mm | 6.8 | 86 |
January in Heroica Matamoros averages a daily high of 22.3°C with nights around 11.3°C. Expect roughly 6.6 wet days totalling 25.2mm. Comfortable conditions for being outdoors all day.
February in Heroica Matamoros averages a daily high of 23.8°C with nights around 13.1°C. Expect roughly 5.2 wet days totalling 23.4mm. Comfortable conditions for being outdoors all day.
March in Heroica Matamoros averages a daily high of 26.5°C with nights around 16.3°C. Expect roughly 5.3 wet days totalling 36.1mm. Comfortable conditions for being outdoors all day.
April in Heroica Matamoros averages a daily high of 29.4°C with nights around 19.5°C. Expect roughly 4.6 wet days totalling 33.1mm. Comfortable conditions for being outdoors all day.
May in Heroica Matamoros averages a daily high of 32.1°C with nights around 23°C. Expect roughly 4.6 wet days totalling 58.9mm. Generally workable, with some weather to plan around.
June in Heroica Matamoros averages a daily high of 34.1°C with nights around 24.8°C. Expect roughly 5.7 wet days totalling 67.4mm. Generally workable, with some weather to plan around.
July in Heroica Matamoros averages a daily high of 34.5°C with nights around 25.1°C. Expect roughly 5.3 wet days totalling 64.2mm. Generally workable, with some weather to plan around.
August in Heroica Matamoros averages a daily high of 35.2°C with nights around 25.1°C. Expect roughly 6.3 wet days totalling 56.6mm. Generally workable, with some weather to plan around.
September in Heroica Matamoros averages a daily high of 33.1°C with nights around 23.5°C. Expect roughly 11.2 wet days totalling 149.5mm. Demanding conditions — pack for it and plan indoor options.
October in Heroica Matamoros averages a daily high of 30.3°C with nights around 19.9°C. Expect roughly 7.7 wet days totalling 100mm. Generally workable, with some weather to plan around.
November in Heroica Matamoros averages a daily high of 26.4°C with nights around 15.7°C. Expect roughly 7.1 wet days totalling 49.9mm. Comfortable conditions for being outdoors all day.
December in Heroica Matamoros averages a daily high of 23.2°C with nights around 12.3°C. Expect roughly 6.8 wet days totalling 31.3mm. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Heroica Matamoros peaks at 90.
Based on 30 years of records, November–March scores highest for comfort in Heroica Matamoros, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 35.2°C.
September is the wettest, averaging 149.5mm of rain across roughly 11.2 wet days.
January is the coolest month, with average daily highs around 22.3°C.