Temperatures in September
It's hot in September in Haleakala National Park with an average temperature of 32°C. Temperatures this month range from a low of 31°C to a high of 33°C. At night, you can expect temperatures between 23°C and 25°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Haleakala National Park in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Haleakala National Park with hot temperatures, averaging around 33°C during the day and nights close to 24°C. There’s little chance of precipitation. The weather is mostly sunny and dry. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Mid-September
By mid-September, the average daytime temperature stays the same at 33°C, with nights close to 24°C. Not much precipitation expected during this period. It’s mostly dry with sunshine. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
End of September
By the end of September, the average daytime temperature in Haleakala National Park will be around 33°C, with nights close to 24°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
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Precipitation in September
In September, there is an average of 24 mm of precipitation, spread over 3 days. The wind speed is around 5 Bft, mostly coming from the Northeast.
The precipitation chance averages 11% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Haleakala National Park. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Haleakala National Park in September |
UK | ||
|---|---|---|---|
 Average Temperature |
32°C | 20°C | |
 High Temp |
33°C | 22°C | |
| Low Temp |
31°C | 17°C | |
 Total Precipitation |
24 mm | 44 mm | |
| Rainy Days |
3 days | 8 days | |
August
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.
Is September a good time to visit Haleakala National Park?
September is a great month to be in Haleakala National Park for sunny weather. You’ll get high temperatures and not too much rain this month.
Temperature records for Haleakala National Park in September
With 35°C, Haleakala National Park hit the highest temperature in the last 10 years in September 2020. The lowest daytime temperature in this month was 27°C in 2016. The extreme night temperatures ranged from a low of 17°C to a high of 27°C.
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Daily Temperature in September in Haleakala National Park
This chart shows the average daily temperatures, both day and night, for each day in September in Haleakala National Park, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Haleakala National Park
The chart below shows the average daily precipitation in September for Haleakala National Park, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 3 days of rain in Haleakala National Park.
Daily UV Index in September in Haleakala National Park
This chart shows the average daily UV index in September in Haleakala National Park, 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.
Temperature in September in Haleakala National Park Over the Years
This chart shows the average temperature in September in Haleakala National Park, measured in degrees Celsius, over the past years.
Total Precipitation in September in Haleakala National Park Over the Years
This chart shows the average precipitation in September in Haleakala National Park, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Haleakala National Park
Click on a specific day in September for detailed info on the typical weather on that day in Haleakala National Park. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Haleakala National Park
Have you been to Haleakala National Park in September?
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Average Weather in Haleakala National Park by Month
Click on a month below to see detailed weather info for Haleakala National Park. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Haleakala National Park for all months at once
