Río San Juan monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at Río San Juan
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 27.7 | 28.1 | 29 | 29.5 | 30.4 | 31.4 | 31.4 | 31.3 | 31.5 | 30.9 | 29.2 | 27.7 |
| °F | 81.8 | 82.6 | 84.1 | 85 | 86.8 | 88.5 | 88.5 | 88.3 | 88.7 | 87.7 | 84.5 | 81.9 |
Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.
Average rainfall & rainy days
The graph below shows the average rainfall and number of rainy days per month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 135 | 103 | 109 | 152 | 204 | 108 | 132 | 162 | 131 | 166 | 268 | 225 |
| inches | 5.3 | 4 | 4.3 | 6 | 8 | 4.2 | 5.2 | 6.4 | 5.1 | 6.5 | 10.5 | 8.8 |
| Rainy days | 14 | 11 | 11 | 10 | 13 | 13 | 15 | 16 | 16 | 17 | 14 | 15 |
Average annual rainfall in Río San Juan: 1841.8mm (725.1 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in Río San Juan
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 7 | 7.5 | 7.8 | 7.7 | 7.4 | 8.2 | 8.4 | 8.5 | 7.6 | 7.2 | 6.7 | 6 |
Day / night temperatures
The graph below shows the daily range of temperatures for each month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 18.9 | 19.1 | 19.4 | 19.9 | 21 | 21.8 | 21.8 | 21.7 | 21.7 | 21.5 | 20.4 | 19.5 |
| Max °C | 27.9 | 28.4 | 29.2 | 29.7 | 30.7 | 31.6 | 31.6 | 31.5 | 31.8 | 31.2 | 29.4 | 28 |
| Min °F | 66 | 66.3 | 66.9 | 67.8 | 69.7 | 71.2 | 71.2 | 71.1 | 71 | 70.6 | 68.7 | 67 |
| Max °F | 74.1 | 74.7 | 75.7 | 76.6 | 78.4 | 80.1 | 80.1 | 79.9 | 80.1 | 79.3 | 76.8 | 74.7 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 26.5 | 26.1 | 26.1 | 26.5 | 27.2 | 28 | 28.3 | 28.7 | 29 | 29 | 28.3 | 27.3 |
| °F | 79.8 | 79.1 | 78.9 | 79.7 | 81 | 82.4 | 82.9 | 83.6 | 84.2 | 84.1 | 82.9 | 81.1 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 9 | 10 | 11 | 10 | 10 | 11 | 12 | 11 | 10 | 8 | 8 | 9 |
| mph | 6 | 6 | 7 | 7 | 6 | 7 | 7 | 7 | 6 | 5 | 5 | 5 |
A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.
Relative humidity
The graph below shows the average relative humidity.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 78% | 76% | 74% | 74% | 77% | 74% | 74% | 75% | 75% | 77% | 79% | 80% |
Other monthly averages
Río San Juan weather stats
| Hottest month: | June | 31.4°C 88.5°F |
|---|---|---|
| Driest month: | February | 103mm 4.1ins |
| Sunniest month: | August | 8.5hrs |
| Coldest month: | January | 27.7°C 81.9°F |
| Wettest month: | November | 268mm 10.6ins |
| Warmest sea: | September | 29°C 84.2°F |
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