Climate averages 1991–2020
San Juan, Peru weather
in July.
A hot, wet month: the 11th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in San Juan, Peru: daytime highs average 28.3°C and nights cool to about 22.1°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 165 mm of rain on roughly 23 days, which makes July a wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 55 min on an average July day.
The nearest other city in this atlas is Iquitos (4 km away). In July its highs average 28.2°C, about as warm as San Juan, Peru, with 165 mm of rain.
Among the 24 cities listed in Peru, San Juan, Peru ranks 4th of 24 for the warmest July highs and joint 23rd of 24 for the driest July (rainfall, lowest first). The mean July high of those 24 cities is 22.4°C; San Juan, Peru is 5.9°C warmer than that mean.
From July to August, average highs rise by 1.1°C to 29.4°C, and monthly rainfall falls from 165 mm to 154 mm.
The annual picture
July 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
San Juan, Peru climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.0°C23.4°C | 23.4°C | 252 | 25.9 | 12.312 h |
| February | 30.0°C23.5°C | 23.5°C | 235 | 24.7 | 12.212 h |
| March | 29.9°C23.5°C | 23.5°C | 304 | 28.4 | 12.112 h |
| April | 29.4°C23.3°C | 23.3°C | 294 | 27.3 | 12.012 h |
| May | 28.8°C22.9°C | 22.9°C | 271 | 26.7 | 11.912 h |
| June | 28.2°C22.4°C | 22.4°C | 218 | 25.0 | 11.912 h |
| July, selected | 28.3°C22.1°C | 22.1°C | 165 | 23.3 | 11.912 h |
| August | 29.4°C22.5°C | 22.5°C | 154 | 21.8 | 12.012 h |
| September | 30.1°C23.1°C | 23.1°C | 179 | 23.5 | 12.112 h |
| October | 30.3°C23.5°C | 23.5°C | 201 | 25.8 | 12.212 h |
| November | 29.9°C23.5°C | 23.5°C | 235 | 25.8 | 12.312 h |
| December | 29.9°C23.4°C | 23.4°C | 263 | 27.2 | 12.312 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
July in nearby cities
- Iquitos in JulyPeru · 4 kmHigh 28.2°C · Low 22.0°C · 165 mm rain
- Cruzeiro do Sul in JulyBrazil · 433 kmHigh 28.5°C · Low 21.0°C · 56 mm rain
- Pucallpa in JulyPeru · 531 kmHigh 28.6°C · Low 21.7°C · 82 mm rain
- Cuenca in JulyEcuador · 642 kmHigh 16.0°C · Low 9.2°C · 74 mm rain
- Florencia in JulyColombia · 653 kmHigh 24.6°C · Low 17.6°C · 212 mm rain
- Loja in JulyEcuador · 658 kmHigh 19.8°C · Low 12.8°C · 37 mm rain
- Pitalito in JulyColombia · 698 kmHigh 20.7°C · Low 13.8°C · 316 mm rain
- Ipiales in JulyColombia · 705 kmHigh 14.2°C · Low 7.9°C · 147 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 San Juan) is explained once on the San Juan, Peru year overview and on the Sources, method and limits page.
Iquitos lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.