| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 26.6° | 13.9° | 1.1mm | 0.4 | 99 |
| February | 26.4° | 14.4° | 3.3mm | 0.4 | 99 |
| March | 26.8° | 15.1° | 2.1mm | 0.3 | 99 |
| April | 28.3° | 17.2° | 7.7mm | 0.3 | 94 |
| May | 30.7° | 20.9° | 0mm | 0 | 85 |
| June | 32.6° | 25° | 54.7mm | 3.3 | 71 |
| July | 33.5° | 25.1° | 147.2mm | 9.3 | 55 |
| August | 34° | 25° | 230.8mm | 13.3 | 45 |
| September | 33.5° | 24.9° | 230.5mm | 10.9 | 52 |
| October | 33° | 23.8° | 66.9mm | 3.8 | 68 |
| November | 30.7° | 19.3° | 29mm | 1.1 | 83 |
| December | 27.5° | 15.1° | 5.1mm | 0.7 | 97 |
January in Mazatlán averages a daily high of 26.6°C with nights around 13.9°C. Rain is rare — about 0.4 wet days and 1.1mm across the month. Comfortable conditions for being outdoors all day.
February in Mazatlán averages a daily high of 26.4°C with nights around 14.4°C. Rain is rare — about 0.4 wet days and 3.3mm across the month. Comfortable conditions for being outdoors all day.
March in Mazatlán averages a daily high of 26.8°C with nights around 15.1°C. Rain is rare — about 0.3 wet days and 2.1mm across the month. Comfortable conditions for being outdoors all day.
April in Mazatlán averages a daily high of 28.3°C with nights around 17.2°C. Rain is rare — about 0.3 wet days and 7.7mm across the month. Comfortable conditions for being outdoors all day.
May in Mazatlán averages a daily high of 30.7°C with nights around 20.9°C. Rain is rare — about 0 wet days and 0mm across the month. Comfortable conditions for being outdoors all day.
June in Mazatlán averages a daily high of 32.6°C with nights around 25°C. Expect roughly 3.3 wet days totalling 54.7mm. Generally workable, with some weather to plan around.
July in Mazatlán averages a daily high of 33.5°C with nights around 25.1°C. Expect roughly 9.3 wet days totalling 147.2mm. Generally workable, with some weather to plan around.
August in Mazatlán averages a daily high of 34°C with nights around 25°C. Expect roughly 13.3 wet days totalling 230.8mm. Demanding conditions — pack for it and plan indoor options.
September in Mazatlán averages a daily high of 33.5°C with nights around 24.9°C. Expect roughly 10.9 wet days totalling 230.5mm. Demanding conditions — pack for it and plan indoor options.
October in Mazatlán averages a daily high of 33°C with nights around 23.8°C. Expect roughly 3.8 wet days totalling 66.9mm. Generally workable, with some weather to plan around.
November in Mazatlán averages a daily high of 30.7°C with nights around 19.3°C. Rain is rare — about 1.1 wet days and 29mm across the month. Comfortable conditions for being outdoors all day.
December in Mazatlán averages a daily high of 27.5°C with nights around 15.1°C. Rain is rare — about 0.7 wet days and 5.1mm across the month. 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. Mazatlán peaks at 99.
Based on 30 years of records, December–April scores highest for comfort in Mazatlán, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 34°C.
August is the wettest, averaging 230.8mm of rain across roughly 13.3 wet days.
February is the coolest month, with average daily highs around 26.4°C.