Climate averages 1991–2020
San Juan, Peru weather
in April.
A hot, very wet month: the joint 8th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a hot month in San Juan, Peru: daytime highs average 29.4°C and nights cool to about 23.3°C. By daytime temperature it is the joint 8th warmest of the 12 months.
Expect about 294 mm of rain on roughly 27 days, which makes April a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 02 min on an average April day.
The nearest other city in this atlas is Iquitos (4 km away). In April its highs average 29.4°C, about as warm as San Juan, Peru, with 294 mm of rain.
Among the 24 cities listed in Peru, San Juan, Peru ranks joint 4th of 24 for the warmest April highs and joint 23rd of 24 for the driest April (rainfall, lowest first). The mean April high of those 24 cities is 24.7°C; San Juan, Peru is 4.7°C warmer than that mean.
From April to May, average highs fall by 0.6°C to 28.8°C, and monthly rainfall falls from 294 mm to 271 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Iquitos in AprilPeru · 4 kmHigh 29.4°C · Low 23.2°C · 294 mm rain
- Cruzeiro do Sul in AprilBrazil · 433 kmHigh 29.0°C · Low 22.5°C · 221 mm rain
- Pucallpa in AprilPeru · 531 kmHigh 29.2°C · Low 23.0°C · 257 mm rain
- Cuenca in AprilEcuador · 642 kmHigh 17.8°C · Low 11.4°C · 155 mm rain
- Florencia in AprilColombia · 653 kmHigh 26.6°C · Low 18.8°C · 239 mm rain
- Loja in AprilEcuador · 658 kmHigh 20.8°C · Low 14.8°C · 148 mm rain
- Pitalito in AprilColombia · 698 kmHigh 22.8°C · Low 15.4°C · 329 mm rain
- Ipiales in AprilColombia · 705 kmHigh 16.1°C · Low 9.6°C · 258 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.