Oeiras monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at Oeiras
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 31.5 | 31.3 | 31.1 | 30.8 | 31.5 | 32.6 | 32.8 | 34.1 | 35.6 | 34.9 | 34.7 | 33.2 |
| °F | 88.7 | 88.3 | 87.9 | 87.4 | 88.8 | 90.8 | 91 | 93.4 | 96.1 | 94.8 | 94.4 | 91.8 |
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 | 161 | 165 | 177 | 114 | 20 | 6 | 2 | 1 | 8 | 33 | 75 | 119 |
| inches | 6.3 | 6.5 | 7 | 4.5 | 0.8 | 0.2 | 0.1 | 0 | 0.3 | 1.3 | 3 | 4.7 |
| Rainy days | 22 | 24 | 27 | 26 | 26 | 20 | 18 | 12 | 12 | 9 | 11 | 15 |
Average annual rainfall in Oeiras: 832.534mm (327.8 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in Oeiras
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 5.4 | 5.8 | 6.2 | 7.2 | 8.6 | 9.3 | 9.7 | 10 | 9.7 | 8.8 | 8.1 | 6.8 |
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 | 22.3 | 22.1 | 21.3 | 21.8 | 21 | 20.1 | 19.9 | 20.8 | 22.9 | 23.7 | 23.1 | 23 |
| Max °C | 31.8 | 31.5 | 31.3 | 31 | 31.8 | 33 | 33.1 | 34.5 | 35.9 | 35.2 | 35 | 33.5 |
| Min °F | 72.1 | 71.8 | 70.3 | 71.2 | 69.8 | 68.1 | 67.8 | 69.4 | 73.2 | 74.6 | 73.5 | 73.3 |
| Max °F | 80.6 | 80.2 | 79.3 | 79.5 | 79.5 | 79.7 | 79.7 | 81.7 | 84.9 | 84.9 | 84.2 | 82.8 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 27.4 | 27.8 | 28 | 28 | 27.6 | 27 | 26.3 | 25.9 | 25.8 | 26 | 26.4 | 27 |
| °F | 81.3 | 82 | 82.4 | 82.5 | 81.7 | 80.6 | 79.4 | 78.6 | 78.4 | 78.8 | 79.6 | 80.5 |
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 | 8 | 7 | 7 | 7 | 8 | 9 | 11 | 13 | 12 | 12 | 11 |
| mph | 5 | 5 | 4 | 4 | 4 | 5 | 6 | 7 | 8 | 7 | 7 | 7 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 72% | 74% | 78% | 75% | 68% | 56% | 52% | 47% | 43% | 49% | 54% | 63% |
Other monthly averages
Oeiras weather stats
| Hottest month: | September | 35.6°C 96.1°F |
|---|---|---|
| Driest month: | August | 1mm 0ins |
| Sunniest month: | August | 10hrs |
| Coldest month: | March | 31.1°C 88°F |
| Wettest month: | March | 177mm 7ins |
| Warmest sea: | April | 28°C 82.4°F |
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