Average temperature in September is 22.2 °C
Average daytime temperature is 22.8 °C
Average night temperature is 21.5 °C
Absolute maximum temperature: 24.6 °C
Absolute minimum temperature: 19.4 °C
Number of sunny days: 7
Number of rainy days: 23
Number of snow days:
Precipitation sum: 131 mm
* Weather data for Avarua Cook Islands is based on climate observations for 2023 year
| September (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 21.6 | 21.2 | 23 | 23 | 23.2 | 22.5 | 22.9 | 23.1 | 23.1 | 22.7 | 22.3 | 22 | 22.6 | 23.5 | 24.1 | 24.2 | 24.3 | 22.4 | 22.6 | 22.1 | 22.6 | 21.2 | 21.1 | 21.5 | 21.9 | 23 | 23.3 | 24.1 | 24.5 | 24.6 |
| Apparent max temperature | 19.8 | 20.1 | 23.6 | 22.1 | 21.6 | 20.3 | 20.4 | 21 | 21.2 | 21.8 | 20.3 | 20.6 | 23 | 24.7 | 26 | 27.5 | 28.3 | 20.2 | 20.2 | 19.6 | 20.3 | 18.1 | 16.5 | 18.3 | 19 | 22.3 | 23.4 | 24.8 | 27.4 | 29 |
| Mean temperature | 20.6 | 20.9 | 22.2 | 22.7 | 22.9 | 21.9 | 22.5 | 22.3 | 22.2 | 22.4 | 21.5 | 21.5 | 22.2 | 23.2 | 23.9 | 23.7 | 22.3 | 21.7 | 21.4 | 21.2 | 21.1 | 20.4 | 20.8 | 21.2 | 21.3 | 22.1 | 22.9 | 23.6 | 24.2 | 24.2 |
| Apparent mean temperature | 17.5 | 18.1 | 20.4 | 20.3 | 20.1 | 16.8 | 18.1 | 18.8 | 20 | 19.5 | 15.6 | 16.9 | 19.8 | 22.2 | 22.9 | 23.4 | 19.1 | 17.8 | 16.9 | 16.6 | 16.8 | 14.5 | 13.9 | 14.6 | 16.6 | 18.6 | 20.2 | 21.8 | 23.9 | 25.9 |
| Minimum temperature | 19.7 | 20.6 | 21.4 | 22.4 | 22.5 | 21.5 | 21.6 | 21.4 | 21.6 | 21.9 | 20.9 | 20.9 | 21.8 | 22.9 | 23.6 | 23.4 | 21.3 | 21.2 | 20.4 | 20.1 | 19.9 | 19.4 | 19.9 | 20.7 | 20.6 | 20.8 | 22.7 | 23.1 | 24 | 23.7 |
| Apparent min temperature | 18.2 | 19.1 | 21.6 | 21.1 | 20.7 | 18.8 | 19.3 | 19.9 | 20.5 | 20.6 | 17.4 | 18 | 20.8 | 22.9 | 23.9 | 24.8 | 22.2 | 18.5 | 18.2 | 17.7 | 18.1 | 15.9 | 15 | 15.9 | 17.4 | 19.7 | 21.3 | 22.9 | 25 | 27.1 |
| September | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12 | 12 | 12 | 12 | 12 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.3 |
| Sunshine duration (h) | 10.8 | 9 | 10.9 | 10.5 | 10.6 | 4.7 | 10.3 | 6.8 | 6.7 | 0.7 | 5.2 | 11 | 11 | 11 | 11 | 7.7 | 9.5 | 11 | 11 | 11 | 10.7 | 11.1 | 11 | 11.1 | 11 | 11 | 11 | 11.1 | 11.1 | 11.2 |
| Precipitation (mm) | 0.3 | 0 | 0 | 0 | 0.9 | 31.3 | 0.5 | 5.7 | 57.1 | 24.2 | 2.4 | 0 | 0.9 | 0.1 | 0 | 0 | 3.9 | 0.2 | 0.1 | 0.3 | 0.6 | 0.1 | 0.4 | 0.1 | 0.7 | 0.8 | 0.4 | 0.1 | 0 | 0.1 |
| Precipitation hours | 3 | 0 | 0 | 0 | 3 | 21 | 5 | 13 | 23 | 24 | 7 | 0 | 7 | 1 | 0 | 0 | 11 | 2 | 1 | 3 | 6 | 1 | 2 | 1 | 6 | 6 | 4 | 1 | 0 | 1 |
| Wind speed (m/s) | 34.4 | 25.5 | 18.5 | 28.8 | 36.6 | 54 | 50 | 42.8 | 40.5 | 41.3 | 50 | 41.3 | 32.8 | 25.1 | 27.3 | 26.3 | 37.1 | 39 | 41.1 | 42.1 | 41.4 | 44.1 | 53.3 | 51.7 | 44.1 | 38.8 | 39 | 37.7 | 32.1 | 22.6 |
In September 2023, the highest daytime temperature in Avarua was 24.6°C.
While the minimum temperature at night dropped to 19.4°C.
The average nighttime and daytime temperatures during September in Avarua are 21.5°C and 22.8°C respectively.
The precipitation sum in September is about 131 mm.