Climate averages 1991–2020
Montero weather
in September.
A hot, wet month: the 5th warmest and the joint 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Montero: daytime highs average 29.1°C and nights cool to about 20.0°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 96 mm of rain on roughly 8 days, which makes September a wet month (the joint 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 59 min on an average September day.
The nearest other city in this atlas is Santa Cruz de la Sierra (50 km away). In September its highs average 28.9°C, about as warm as Montero, with 65 mm of rain.
Among the 14 cities listed in Bolivia, Montero ranks 3rd of 14 for the warmest September highs and 13th of 14 for the driest September (rainfall, lowest first). The mean September high of those 14 cities is 22.6°C; Montero is 6.5°C warmer than that mean.
From September to October, average highs rise by 0.6°C to 29.7°C, and monthly rainfall rises from 96 mm to 137 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
Montero climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.3°C22.5°C | 22.5°C | 232 | 22.6 | 13.013 h |
| February | 28.7°C22.2°C | 22.2°C | 210 | 21.1 | 12.713 h |
| March | 28.7°C22.0°C | 22.0°C | 155 | 19.6 | 12.212 h |
| April | 27.7°C20.8°C | 20.8°C | 96 | 14.0 | 11.712 h |
| May | 25.1°C18.6°C | 18.6°C | 82 | 12.0 | 11.311 h |
| June | 24.2°C17.6°C | 17.6°C | 61 | 9.9 | 11.111 h |
| July | 24.5°C16.8°C | 16.8°C | 46 | 6.6 | 11.211 h |
| August | 27.2°C18.2°C | 18.2°C | 50 | 5.8 | 11.512 h |
| September, selected | 29.1°C20.0°C | 20.0°C | 96 | 8.4 | 12.012 h |
| October | 29.7°C21.6°C | 21.6°C | 137 | 14.6 | 12.512 h |
| November | 29.3°C21.8°C | 21.8°C | 172 | 17.1 | 12.913 h |
| December | 29.2°C22.4°C | 22.4°C | 239 | 23.3 | 13.113 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
- Santa Cruz de la Sierra in SeptemberBolivia · 50 kmHigh 28.9°C · Low 19.6°C · 65 mm rain
- Sucre in SeptemberBolivia · 284 kmHigh 20.1°C · Low 7.6°C · 43 mm rain
- Sacaba in SeptemberBolivia · 296 kmHigh 20.0°C · Low 9.1°C · 59 mm rain
- Cochabamba in SeptemberBolivia · 309 kmHigh 21.6°C · Low 9.7°C · 23 mm rain
- Quillacollo in SeptemberBolivia · 321 kmHigh 22.4°C · Low 9.7°C · 23 mm rain
- Trinidad in SeptemberBolivia · 330 kmHigh 31.2°C · Low 22.2°C · 106 mm rain
- Potosí in SeptemberBolivia · 363 kmHigh 15.7°C · Low 0.1°C · 26 mm rain
- Oruro in SeptemberBolivia · 413 kmHigh 15.6°C · Low -0.1°C · 21 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 Montero) is explained once on the Montero year overview and on the Sources, method and limits page.