Climate averages 1991–2020
La Paz weather
in September.
A cool, fairly dry month: the 4th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a cool month in La Paz: daytime highs average 14.3°C and nights cool to about 2.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 36 mm of rain on roughly 13 days, which makes September a fairly dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 00 min on an average September day.
The nearest other city in this atlas is Viacha (23 km away). In September its highs average 15.2°C, 0.9°C warmer than La Paz, with 32 mm of rain.
Among the 14 cities listed in Bolivia, La Paz ranks 14th of 14 for the warmest September highs and 8th of 14 for the driest September (rainfall, lowest first). The mean September high of those 14 cities is 22.6°C; La Paz is 8.3°C cooler than that mean.
From September to October, average highs rise by 0.7°C to 15.0°C, and monthly rainfall rises from 36 mm to 55 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
La Paz climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 14.2°C5.8°C | 5.8°C | 132 | 26.4 | 13.013 h |
| February | 14.2°C5.7°C | 5.7°C | 116 | 23.4 | 12.613 h |
| March | 14.1°C5.3°C | 5.3°C | 89 | 23.4 | 12.212 h |
| April | 13.9°C4.1°C | 4.1°C | 43 | 13.8 | 11.712 h |
| May | 14.1°C2.4°C | 2.4°C | 16 | 5.4 | 11.411 h |
| June | 13.5°C1.1°C | 1.1°C | 11 | 3.6 | 11.211 h |
| July | 13.1°C0.5°C | 0.5°C | 14 | 4.4 | 11.211 h |
| August | 13.7°C1.1°C | 1.1°C | 21 | 6.9 | 11.612 h |
| September, selected | 14.3°C2.4°C | 2.4°C | 36 | 12.5 | 12.012 h |
| October | 15.0°C4.0°C | 4.0°C | 55 | 16.1 | 12.512 h |
| November | 15.6°C5.0°C | 5.0°C | 57 | 16.2 | 12.913 h |
| December | 14.8°C5.7°C | 5.7°C | 112 | 22.8 | 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
- Viacha in SeptemberBolivia · 23 kmHigh 15.2°C · Low 0.7°C · 32 mm rain
- Oruro in SeptemberBolivia · 198 kmHigh 15.6°C · Low -0.1°C · 21 mm rain
- Puno in SeptemberPeru · 213 kmHigh 15.8°C · Low 2.2°C · 51 mm rain
- Quillacollo in SeptemberBolivia · 222 kmHigh 22.4°C · Low 9.7°C · 23 mm rain
- Cochabamba in SeptemberBolivia · 233 kmHigh 21.6°C · Low 9.7°C · 23 mm rain
- Juliaca in SeptemberPeru · 239 kmHigh 15.9°C · Low 1.1°C · 46 mm rain
- Sacaba in SeptemberBolivia · 246 kmHigh 20.0°C · Low 9.1°C · 59 mm rain
- Tacna in SeptemberPeru · 280 kmHigh 20.5°C · Low 13.1°C · 2.4 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 La Paz) is explained once on the La Paz year overview and on the Sources, method and limits page.