Climate averages 1991–2020
Mérida weather
in September.
A hot, wet month: the joint 6th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Mérida: daytime highs average 32.8°C and nights cool to about 24.1°C. By daytime temperature it is the joint 6th warmest of the 12 months.
Expect about 134 mm of rain on roughly 19 days, which makes September a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average September day.
The nearest other city in this atlas is Kanasín (8 km away). In September its highs average 33.1°C, about as warm as Mérida, with 134 mm of rain.
Among the 153 cities listed in Mexico, Mérida ranks joint 11th of 153 for the warmest September highs and joint 72nd of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; Mérida is 6.3°C warmer than that mean.
From September to October, average highs fall by 1.9°C to 30.9°C, and monthly rainfall falls from 134 mm to 86 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
Mérida climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.6°C19.1°C | 19.1°C | 21 | 4.2 | 11.011 h |
| February | 30.5°C19.9°C | 19.9°C | 15 | 3.0 | 11.411 h |
| March | 32.8°C21.0°C | 21.0°C | 14 | 3.0 | 12.012 h |
| April | 35.2°C22.9°C | 22.9°C | 23 | 4.4 | 12.613 h |
| May | 35.7°C24.3°C | 24.3°C | 51 | 7.8 | 13.113 h |
| June | 34.0°C24.6°C | 24.6°C | 124 | 16.6 | 13.413 h |
| July | 34.2°C24.3°C | 24.3°C | 85 | 15.6 | 13.313 h |
| August | 34.1°C24.4°C | 24.4°C | 95 | 17.0 | 12.813 h |
| September, selected | 32.8°C24.1°C | 24.1°C | 134 | 19.2 | 12.312 h |
| October | 30.9°C23.0°C | 23.0°C | 86 | 13.6 | 11.712 h |
| November | 29.5°C21.0°C | 21.0°C | 30 | 5.7 | 11.211 h |
| December | 28.8°C19.8°C | 19.8°C | 22 | 4.2 | 10.911 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
- Kanasín in SeptemberMexico · 8 kmHigh 33.1°C · Low 24.0°C · 134 mm rain
- Campeche in SeptemberMexico · 156 kmHigh 31.8°C · Low 24.9°C · 174 mm rain
- Playa del Carmen in SeptemberMexico · 267 kmHigh 29.6°C · Low 25.6°C · 166 mm rain
- Cozumel in SeptemberMexico · 284 kmHigh 28.8°C · Low 26.6°C · 179 mm rain
- Cancún in SeptemberMexico · 289 kmHigh 29.2°C · Low 25.9°C · 162 mm rain
- Chetumal in SeptemberMexico · 305 kmHigh 30.6°C · Low 24.6°C · 186 mm rain
- Ciudad del Carmen in SeptemberMexico · 346 kmHigh 29.4°C · Low 25.2°C · 226 mm rain
- Belmopan in SeptemberBelize · 423 kmHigh 30.5°C · Low 23.5°C · 150 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 Mérida) is explained once on the Mérida year overview and on the Sources, method and limits page.
Kanasín lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.