Santa Helena monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at Santa Helena
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 30.8 | 30 | 29.9 | 30.1 | 30.5 | 30.5 | 30.6 | 31.2 | 31.7 | 31.9 | 32.1 | 31.9 |
| °F | 87.4 | 86 | 85.8 | 86.2 | 86.8 | 86.9 | 87 | 88.1 | 89.1 | 89.4 | 89.7 | 89.5 |
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 | 202 | 343 | 444 | 456 | 339 | 247 | 208 | 62 | 21 | 14 | 16 | 69 |
| inches | 7.9 | 13.5 | 17.5 | 18 | 13.4 | 9.7 | 8.2 | 2.4 | 0.8 | 0.5 | 0.6 | 2.7 |
| Rainy days | 27 | 28 | 31 | 30 | 30 | 20 | 17 | 10 | 10 | 8 | 10 | 16 |
Average annual rainfall in Santa Helena: 2373.4mm (934.4 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in Santa Helena
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 5.7 | 4.3 | 3.8 | 4.1 | 5.4 | 7.2 | 7.8 | 8.6 | 8.5 | 8 | 8.2 | 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 | 22.9 | 22.9 | 23 | 23.1 | 22.4 | 22.7 | 22.5 | 22.6 | 22.9 | 22.9 | 23.1 | 23.3 |
| Max °C | 31 | 30.2 | 30.1 | 30.3 | 30.7 | 30.7 | 30.8 | 31.4 | 32 | 32.1 | 32.3 | 32.2 |
| Min °F | 73.1 | 73.1 | 73.3 | 73.6 | 72.2 | 72.9 | 72.4 | 72.7 | 73.1 | 73.2 | 73.6 | 73.9 |
| Max °F | 80.4 | 79.7 | 79.7 | 80.1 | 79.7 | 80.1 | 79.9 | 80.6 | 81.3 | 81.5 | 81.9 | 81.9 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 28.1 | 28.3 | 28.4 | 28.6 | 28.6 | 28.3 | 27.9 | 27.5 | 27.3 | 27.3 | 27.5 | 27.8 |
| °F | 82.5 | 82.9 | 83.1 | 83.5 | 83.5 | 83 | 82.1 | 81.4 | 81.1 | 81.2 | 81.6 | 82.1 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 7 | 6 | 5 | 5 | 5 | 5 | 6 | 9 | 11 | 12 | 12 | 10 |
| mph | 4 | 4 | 3 | 3 | 3 | 3 | 4 | 5 | 7 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 82% | 86% | 88% | 87% | 87% | 85% | 83% | 80% | 77% | 76% | 75% | 77% |
Other monthly averages
Santa Helena weather stats
| Hottest month: | November | 32.1°C 89.8°F |
|---|---|---|
| Driest month: | October | 14mm 0.6ins |
| Sunniest month: | August | 8.6hrs |
| Coldest month: | February | 30°C 86°F |
| Wettest month: | April | 456mm 18ins |
| Warmest sea: | May | 28.6°C 83.5°F |
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