Climate averages 1991–2020
Juliaca weather
in September.
A mild, moderately wet month: the 3rd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Juliaca: daytime highs average 15.9°C and nights cool to about 1.1°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 46 mm of rain on roughly 10 days, which makes September a moderately wet 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 Puno (40 km away). In September its highs average 15.8°C, about as warm as Juliaca, with 51 mm of rain.
Among the 24 cities listed in Peru, Juliaca ranks 22nd of 24 for the warmest September highs and 18th of 24 for the driest September (rainfall, lowest first). The mean September high of those 24 cities is 23.3°C; Juliaca is 7.4°C cooler than that mean.
From September to October, average highs stay level at 16.0°C, and monthly rainfall rises from 46 mm to 77 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
Juliaca climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.8°C5.0°C | 5.0°C | 193 | 26.3 | 12.913 h |
| February | 13.8°C5.0°C | 5.0°C | 182 | 24.0 | 12.613 h |
| March | 13.7°C4.6°C | 4.6°C | 150 | 25.1 | 12.212 h |
| April | 13.7°C2.7°C | 2.7°C | 75 | 15.7 | 11.812 h |
| May | 14.2°C-0.5°C | -0.5°C | 22 | 5.4 | 11.411 h |
| June | 14.3°C-2.0°C | -2.0°C | 7.0 | 1.7 | 11.211 h |
| July | 14.5°C-2.0°C | -2.0°C | 7.0 | 2.0 | 11.311 h |
| August | 15.4°C-0.8°C | -0.8°C | 18 | 4.8 | 11.612 h |
| September, selected | 15.9°C1.1°C | 1.1°C | 46 | 10.3 | 12.012 h |
| October | 16.0°C2.8°C | 2.8°C | 77 | 14.2 | 12.412 h |
| November | 16.5°C3.9°C | 3.9°C | 76 | 14.1 | 12.813 h |
| December | 15.1°C4.8°C | 4.8°C | 140 | 21.7 | 13.013 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
- Puno in SeptemberPeru · 40 kmHigh 15.8°C · Low 2.2°C · 51 mm rain
- Viacha in SeptemberBolivia · 234 kmHigh 15.2°C · Low 0.7°C · 32 mm rain
- La Paz in SeptemberBolivia · 239 kmHigh 14.3°C · Low 2.4°C · 36 mm rain
- Tacna in SeptemberPeru · 280 kmHigh 20.5°C · Low 13.1°C · 2.4 mm rain
- Cusco in SeptemberPeru · 295 kmHigh 16.2°C · Low 6.6°C · 37 mm rain
- Arica in SeptemberChile · 331 kmHigh 18.1°C · Low 12.8°C · 14 mm rain
- Puerto Maldonado in SeptemberPeru · 339 kmHigh 30.8°C · Low 22.0°C · 119 mm rain
- Abancay in SeptemberPeru · 361 kmHigh 21.0°C · Low 10.7°C · 41 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 Juliaca) is explained once on the Juliaca year overview and on the Sources, method and limits page.