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New ZealandThe weather in September in Portland
It's cool to moderate in September in Portland with an average temperature of 18°C. Temperatures this month range from a low of 16°C to a high of 19°C. At night, you can expect temperatures between 9°C and 12°C.
Looking for sun? September isn’t a good month to be in Portland. The temperature is nice, but there’s too much chance of 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 Portland, New Zealand. 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 30°C in 2019, Portland reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 10°C in 2016. The extreme nighttime temperatures ranged from a lowest recorded value of 4°C to a highest value of 16°C.
Rainfall amount
In September, there is an average of 102 mm of precipitation, spread over 13 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in September for Portland
Click on any day in September to get detailed info about the usual weather on that day in Portland. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Portland | New York | |
|---|---|---|
| Average temperature | 18°C | 27°C |
| Max. temperature | 19°C | 31°C |
| Min. temperature | 9°C | -5°C |
| Total precipitation | 102 mm | 57 mm |
| Rainy days | 13 days | 9 days |
Start of September
The month of September starts in Portland with cool temps, averaging around 17°C during the day and nights around 10°C.
Mid September
By mid-September, daytime temps rise to around 18°C, with nights around 10°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 Portland is around 18°C, while nighttime temps are about 11°C. A shower might pop up, but overall, the weather will be dry and sunny.
UV index
The UV index is a maximum of 8 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 Portland for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Portland, New Zealand. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Portland
Temperature in September in Portland over the years
Precipitation charts
These charts show the average amount of precipitation in September in Portland, New Zealand. 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 Portland
Total precipitation in September in Portland over the years
Daily UV index in September in Portland
This chart shows the average daily UV index in September in Portland, 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 Portland
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Average weather in Portland by month
Click on a month below to see detailed weather info for Portland. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.