Warmest months (mean temperature) (°C)
- Avarua
- March: 26.34
- Copper Mountain
- July: 13.39
Avarua (Cook Islands) vs Copper Mountain (USA): Temperature, Rainfall and Sunshine
Avarua (Cook Islands) has a higher monthly mean temperature than Copper Mountain (USA) in every month of the year.
Key monthly differences
Coolest months (mean temperature) (°C)
- Avarua
- August: 22.59
- Copper Mountain
- December: -9.73
Months with the lowest daily rainfall average (mm/day)
- Avarua
- September: 2.36
- Copper Mountain
- January, December: 0.01
Months with the most daily sunshine (hours/day)
- Avarua
- November: 10.55
- Copper Mountain
- June: 13.34
Compare the climate of two locations
Climate comparison questions
When are the temperatures most similar and most different?
The smallest difference in monthly mean temperature is 9.65 °C (July); the largest is 35.12 °C (January).
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 23.12 °C in Copper Mountain (USA). 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 12 months and Copper Mountain (USA) in 0; 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 5 months and Copper Mountain (USA) in 7; 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
- Copper Mountain (USA) — Reference period: 2013–2023
Monthly climate data
Difference: Copper Mountain (USA) minus Avarua (Cook Islands)
Temperature °C
| Month | Avarua | Copper Mountain | +/- |
|---|---|---|---|
| Jan | 25.86 | -9.27 | -35.12 |
| Feb | 26.16 | -8.25 | -34.41 |
| Mar | 26.34 | -4.61 | -30.96 |
| Apr | 25.67 | -1.27 | -26.94 |
| May | 24.81 | 3.53 | -21.29 |
| Jun | 23.83 | 9.35 | -14.48 |
| Jul | 23.04 | 13.39 | -9.65 |
| Aug | 22.59 | 12.59 | -10.00 |
| Sep | 22.90 | 9.50 | -13.40 |
| Oct | 23.20 | 1.35 | -21.86 |
| Nov | 24.04 | -5.68 | -29.71 |
| Dec | 25.10 | -9.73 | -34.84 |
| ⌀ Month | 24.46 | 0.91 | -23.55 |
Average sunshine (hours/day)
| Month | Avarua | Copper Mountain | +/- |
|---|---|---|---|
| Jan | 10.27 | 7.34 | -2.93 |
| Feb | 10.15 | 8.32 | -1.83 |
| Mar | 9.75 | 9.77 | 0.01 |
| Apr | 9.37 | 11.01 | 1.64 |
| May | 8.72 | 12.02 | 3.30 |
| Jun | 8.72 | 13.34 | 4.62 |
| Jul | 8.54 | 12.72 | 4.18 |
| Aug | 8.97 | 11.91 | 2.93 |
| Sep | 9.94 | 10.94 | 1.00 |
| Oct | 9.95 | 9.34 | -0.61 |
| Nov | 10.55 | 7.91 | -2.64 |
| Dec | 10.24 | 6.79 | -3.45 |
| ⌀ Month | 9.60 | 10.12 | 0.52 |
Average daily rainfall (mm/day)
| Month | Avarua | Copper Mountain | +/- |
|---|---|---|---|
| Jan | 8.14 | 0.01 | -8.13 |
| Feb | 6.90 | 0.02 | -6.88 |
| Mar | 7.51 | 0.03 | -7.48 |
| Apr | 4.72 | 0.10 | -4.62 |
| May | 5.11 | 0.54 | -4.57 |
| Jun | 2.68 | 0.62 | -2.06 |
| Jul | 3.27 | 1.75 | -1.52 |
| Aug | 3.01 | 1.66 | -1.35 |
| Sep | 2.36 | 1.04 | -1.32 |
| Oct | 2.99 | 0.24 | -2.75 |
| Nov | 2.93 | 0.02 | -2.91 |
| Dec | 5.54 | 0.01 | -5.53 |
| ⌀ Month | 4.60 | 0.50 | -4.09 |
Snow (mm)
| Month | Avarua | Copper Mountain | +/- |
|---|---|---|---|
| Jan | 0.00 | 11.57 | 11.57 |
| Feb | 0.00 | 14.08 | 14.08 |
| Mar | 0.00 | 14.11 | 14.11 |
| Apr | 0.00 | 15.65 | 15.65 |
| May | 0.00 | 11.15 | 11.15 |
| Jun | 0.00 | 1.39 | 1.39 |
| Jul | 0.00 | 0.00 | 0.00 |
| Aug | 0.00 | 0.06 | 0.06 |
| Sep | 0.00 | 1.67 | 1.67 |
| Oct | 0.00 | 8.79 | 8.79 |
| Nov | 0.00 | 10.91 | 10.91 |
| Dec | 0.00 | 12.74 | 12.74 |
| ⌀ Month | 0.00 | 8.51 | 8.51 |
