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Cook IslandsThe weather in September in Oneroa
It's warm in September in Oneroa with an average temperature of 24°C. Temperatures this month range from a low of 23°C to a high of 24°C. At night, you can expect temperatures between 21°C and 23°C.
Looking for great weather? September is a good time to be in Oneroa. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Oneroa, Cook Islands. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 29°C in 2018, Oneroa reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 20°C in 2015. The extreme nighttime temperatures ranged from a lowest recorded value of 15°C to a highest value of 25°C.
Rainfall amount
In September, there is an average of 87 mm of precipitation, spread over 11 days. The wind speed is around 5 Bft, mostly coming from the Southeast.
Daily weather in September for Oneroa
Click on any day in September to get detailed info about the usual weather on that day in Oneroa. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Oneroa | New York | |
|---|---|---|
| Average temperature | 24°C | 27°C |
| Max. temperature | 24°C | 31°C |
| Min. temperature | 21°C | -5°C |
| Total precipitation | 87 mm | 57 mm |
| Rainy days | 11 days | 9 days |
Start of September
The month of September starts in Oneroa with warm temps, averaging around 24°C during the day and nights around 23°C.
Mid September
By mid-September, daytime temps stay steady at around 24°C, with nights around 23°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Oneroa is around 24°C, while nighttime temps are about 22°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Oneroa for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Oneroa, Cook Islands. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Oneroa
Temperature in September in Oneroa over the years
Precipitation charts
These charts show the average amount of precipitation in September in Oneroa, Cook Islands. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Oneroa
Total precipitation in September in Oneroa over the years
Daily UV index in September in Oneroa
This chart shows the average daily UV index in September in Oneroa, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Oneroa
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Average weather in Oneroa by month
Click on a month below to see detailed weather info for Oneroa. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.