Climate averages 1991–2020
Mazatenango weather
in September.
A warm, very wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Mazatenango: daytime highs average 27.1°C and nights cool to about 20.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 542 mm of rain on roughly 30 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 13 min on an average September day.
The nearest other city in this atlas is Retalhuleu (19 km away). In September its highs average 28.1°C, 1.0°C warmer than Mazatenango, with 456 mm of rain.
Among the 23 cities listed in Guatemala, Mazatenango ranks 7th of 23 for the warmest September highs and 22nd of 23 for the driest September (rainfall, lowest first). The mean September high of those 23 cities is 24.7°C; Mazatenango is 2.4°C warmer than that mean.
From September to October, average highs fall by 0.4°C to 26.7°C, and monthly rainfall falls from 542 mm to 541 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
Mazatenango climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.3°C19.2°C | 19.2°C | 22 | 6.0 | 11.411 h |
| February | 30.5°C19.4°C | 19.4°C | 17 | 5.2 | 11.712 h |
| March | 30.8°C20.2°C | 20.2°C | 53 | 10.8 | 12.012 h |
| April | 30.5°C21.0°C | 21.0°C | 133 | 17.9 | 12.512 h |
| May | 28.7°C21.1°C | 21.1°C | 437 | 28.5 | 12.813 h |
| June | 27.5°C20.9°C | 20.9°C | 433 | 29.0 | 13.013 h |
| July | 27.9°C21.0°C | 21.0°C | 366 | 30.1 | 12.913 h |
| August | 27.7°C20.9°C | 20.9°C | 452 | 30.6 | 12.613 h |
| September, selected | 27.1°C20.5°C | 20.5°C | 542 | 29.5 | 12.212 h |
| October | 26.7°C20.3°C | 20.3°C | 541 | 29.8 | 11.812 h |
| November | 27.3°C20.1°C | 20.1°C | 207 | 22.0 | 11.511 h |
| December | 28.2°C19.5°C | 19.5°C | 41 | 9.9 | 11.311 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
- Retalhuleu in SeptemberGuatemala · 19 kmHigh 28.1°C · Low 21.9°C · 456 mm rain
- Quetzaltenango in SeptemberGuatemala · 35 kmHigh 19.1°C · Low 13.8°C · 479 mm rain
- Coatepeque in SeptemberGuatemala · 43 kmHigh 26.0°C · Low 19.5°C · 629 mm rain
- Totonicapán in SeptemberGuatemala · 45 kmHigh 19.1°C · Low 12.8°C · 264 mm rain
- Santa Lucía Cotzumalguapa in SeptemberGuatemala · 56 kmHigh 26.6°C · Low 19.5°C · 374 mm rain
- Chichicastenango in SeptemberGuatemala · 62 kmHigh 20.8°C · Low 14.0°C · 265 mm rain
- Santa Cruz del Quiché in SeptemberGuatemala · 67 kmHigh 21.2°C · Low 13.6°C · 264 mm rain
- Malacatán in SeptemberGuatemala · 73 kmHigh 26.4°C · Low 18.4°C · 462 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 Mazatenango) is explained once on the Mazatenango year overview and on the Sources, method and limits page.