Climate averages 1991–2020
Mazatlán weather
in September.
A hot, very wet month: the 5th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Mazatlán: daytime highs average 29.7°C and nights cool to about 25.1°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 205 mm of rain on roughly 19 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average September day.
The nearest other city in this atlas is Victoria de Durango (200 km away). In September its highs average 23.9°C, 5.7°C cooler than Mazatlán, with 116 mm of rain.
Among the 153 cities listed in Mexico, Mazatlán ranks 46th of 153 for the warmest September highs and joint 118th of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; Mazatlán is 3.1°C warmer than that mean.
From September to October, average highs fall by 0.1°C to 29.6°C, and monthly rainfall falls from 205 mm to 65 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Mazatlán climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.5°C16.5°C | 16.5°C | 15 | 1.5 | 10.911 h |
| February | 25.9°C16.5°C | 16.5°C | 15 | 1.2 | 11.411 h |
| March | 26.8°C17.0°C | 17.0°C | 3.2 | 0.4 | 12.012 h |
| April | 28.4°C18.3°C | 18.3°C | 0.7 | 0.2 | 12.713 h |
| May | 30.2°C20.7°C | 20.7°C | 0.6 | 0.2 | 13.213 h |
| June | 31.2°C24.2°C | 24.2°C | 25 | 3.1 | 13.514 h |
| July | 30.7°C25.3°C | 25.3°C | 132 | 14.3 | 13.413 h |
| August | 30.2°C25.4°C | 25.4°C | 184 | 18.8 | 12.913 h |
| September, selected | 29.7°C25.1°C | 25.1°C | 205 | 19.0 | 12.312 h |
| October | 29.6°C23.8°C | 23.8°C | 65 | 6.7 | 11.612 h |
| November | 28.1°C20.5°C | 20.5°C | 35 | 2.0 | 11.011 h |
| December | 26.0°C17.6°C | 17.6°C | 9.3 | 1.4 | 10.711 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Victoria de Durango in SeptemberMexico · 200 kmHigh 23.9°C · Low 14.1°C · 116 mm rain
- Culiacán in SeptemberMexico · 202 kmHigh 31.8°C · Low 24.5°C · 174 mm rain
- Tepic in SeptemberMexico · 247 kmHigh 27.2°C · Low 20.3°C · 357 mm rain
- Guamúchil in SeptemberMexico · 300 kmHigh 32.6°C · Low 24.5°C · 131 mm rain
- Puerto Vallarta in SeptemberMexico · 315 kmHigh 30.4°C · Low 24.1°C · 333 mm rain
- Guasave in SeptemberMexico · 333 kmHigh 33.1°C · Low 25.0°C · 113 mm rain
- San José del Cabo in SeptemberMexico · 336 kmHigh 31.4°C · Low 25.4°C · 140 mm rain
- Cabo San Lucas in SeptemberMexico · 359 kmHigh 30.5°C · Low 26.4°C · 124 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Mazatlán) is explained once on the Mazatlán year overview and on the Sources, method and limits page.