Avarua (Cook Islands) vs Edinburgh of the Seven Seas, Tristan da Cunha (Saint Helena, Ascension and Tristan da Cunha): Temperature, Rainfall and Sunshine
Avarua (Cook Islands) has a higher monthly mean temperature than Edinburgh of the Seven Seas, Tristan da Cunha (Saint Helena, Ascension and Tristan da Cunha) in every month of the year.
| Key monthly differences | Avarua | Edinburgh of the Seven Seas, Tristan da Cunha |
|---|---|---|
| Warmest months (mean temperature) (°C) | March: 26.34 | February: 17.13 |
| Coolest months (mean temperature) (°C) | August: 22.59 | September: 11.23 |
| Months with the lowest daily rainfall average (mm/day) | September: 2.36 | February: 2.93 |
| Months with the most daily sunshine (hours/day) | November: 10.55 | January: 10.17 |
Climate comparison questions
When are the temperatures most similar and most different?
The smallest difference in monthly mean temperature is 9.03 °C (February); the largest is 11.66 °C (September).
How much do temperatures vary across the year?
The difference between the warmest and coolest monthly means is 3.75 °C in Avarua (Cook Islands) and 5.89 °C in Edinburgh of the Seven Seas, Tristan da Cunha (Saint Helena, Ascension and Tristan da Cunha). This describes seasonal variation, not the range between daytime highs and nighttime lows.
Which location has more rainfall?
Avarua (Cook Islands) has a higher daily rainfall average in 4 months and Edinburgh of the Seven Seas, Tristan da Cunha (Saint Helena, Ascension and Tristan da Cunha) in 8; 0 months are equal at the displayed precision. Rainfall amounts do not tell us how many days it rains.
Which location has more sunshine?
Avarua (Cook Islands) has more average sunshine hours per day in 12 months and Edinburgh of the Seven Seas, Tristan da Cunha (Saint Helena, Ascension and Tristan da Cunha) in 0; 0 months are equal at the displayed precision. Sunshine duration is different from daylight duration.
Data and measurement guide
Daily values are averaged separately for each calendar month over the saved reference period. Temperatures are daily means, not daytime highs. Rainfall is an average daily amount, not a monthly total; sunshine is average hours per day. These historical averages are not a weather forecast. Each location’s reference period is listed below and may differ.
- Avarua (Cook Islands) — Reference period: 2013–2023
- Edinburgh of the Seven Seas, Tristan da Cunha (Saint Helena, Ascension and Tristan da Cunha) — Reference period: 2013–2023
Monthly climate data
Difference: Edinburgh of the Seven Seas, Tristan da Cunha (Saint Helena, Ascension and Tristan da Cunha) minus Avarua (Cook Islands)
Temperature °C
| Month | Avarua | Edinburgh of the Seven Seas, Tristan da Cunha | +/- |
|---|---|---|---|
| Jan | 25.86 | 16.61 | -9.24 |
| Feb | 26.16 | 17.13 | -9.03 |
| Mar | 26.34 | 16.91 | -9.43 |
| Apr | 25.67 | 15.75 | -9.93 |
| May | 24.81 | 14.24 | -10.57 |
| Jun | 23.83 | 12.88 | -10.96 |
| Jul | 23.04 | 11.89 | -11.15 |
| Aug | 22.59 | 11.43 | -11.16 |
| Sep | 22.90 | 11.23 | -11.66 |
| Oct | 23.20 | 12.06 | -11.14 |
| Nov | 24.04 | 13.27 | -10.77 |
| Dec | 25.10 | 15.36 | -9.75 |
| ⌀ Month | 24.46 | 14.06 | -10.40 |
Average sunshine (hours/day)
| Month | Avarua | Edinburgh of the Seven Seas, Tristan da Cunha | +/- |
|---|---|---|---|
| Jan | 10.27 | 10.17 | -0.10 |
| Feb | 10.15 | 9.70 | -0.44 |
| Mar | 9.75 | 8.23 | -1.53 |
| Apr | 9.37 | 7.22 | -2.15 |
| May | 8.72 | 6.10 | -2.62 |
| Jun | 8.72 | 5.33 | -3.39 |
| Jul | 8.54 | 5.76 | -2.79 |
| Aug | 8.97 | 6.96 | -2.01 |
| Sep | 9.94 | 7.73 | -2.21 |
| Oct | 9.95 | 8.65 | -1.29 |
| Nov | 10.55 | 9.48 | -1.06 |
| Dec | 10.24 | 9.72 | -0.52 |
| ⌀ Month | 9.60 | 7.92 | -1.68 |
Average daily rainfall (mm/day)
| Month | Avarua | Edinburgh of the Seven Seas, Tristan da Cunha | +/- |
|---|---|---|---|
| Jan | 8.14 | 3.10 | -5.04 |
| Feb | 6.90 | 2.93 | -3.97 |
| Mar | 7.51 | 5.28 | -2.23 |
| Apr | 4.72 | 5.56 | 0.84 |
| May | 5.11 | 6.14 | 1.02 |
| Jun | 2.68 | 6.83 | 4.15 |
| Jul | 3.27 | 5.67 | 2.39 |
| Aug | 3.01 | 4.40 | 1.39 |
| Sep | 2.36 | 4.57 | 2.21 |
| Oct | 2.99 | 5.17 | 2.18 |
| Nov | 2.93 | 3.87 | 0.93 |
| Dec | 5.54 | 3.37 | -2.17 |
| ⌀ Month | 4.60 | 4.74 | 0.14 |
Snow (mm)
| Month | Avarua | Edinburgh of the Seven Seas, Tristan da Cunha | +/- |
|---|---|---|---|
| Jan | 0.00 | 0.00 | 0.00 |
| Feb | 0.00 | 0.00 | 0.00 |
| Mar | 0.00 | 0.00 | 0.00 |
| Apr | 0.00 | 0.00 | 0.00 |
| May | 0.00 | 0.00 | 0.00 |
| Jun | 0.00 | 0.00 | 0.00 |
| Jul | 0.00 | 0.00 | 0.00 |
| Aug | 0.00 | 0.04 | 0.04 |
| Sep | 0.00 | 0.03 | 0.03 |
| Oct | 0.00 | 0.00 | 0.00 |
| Nov | 0.00 | 0.00 | 0.00 |
| Dec | 0.00 | 0.00 | 0.00 |
| ⌀ Month | 0.00 | 0.01 | 0.01 |
