Are you considering a trip to Honolulu in September? Well, the weather is usually on your side with an average maximum temperature of +86°F and about 7 sunny days. Just keep in mind that there may be some rain, with an average of 3 rainy days and 27 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flightsin one click on Avionero.
Average weather
☀️
+86°F
Avg. max. temperature
+68°F
Min.
+93°F
Max.
27 mm
Total precipitation
68%
Avg. humidity
4 m/s
Avg. wind
7 ☀️
Sunny Days
20 ⛅️
Cloudy
3 🌦
Rainy
Our opinion: Honolulu has good weather in September.
Average temperature in Honolulu in September
Here are the expected maximum, average and minimum temperatures in Honolulu for September based on the historical data.
Last Year
Historical Data
The expected average maximum temperature in September is +86°F with a maximum of +88°F and a minimum of +73°F.
The average maximum temperature goes up 13% by the end of the month, compared with the beginning of the month, from +86°F to +88°F.
Is Honolulu warm or cold in September?
Honolulu is typically warm in September.
Maximum temperatures go up compared to the previous month from +86°F to +86°F. The minimum temperature also goes up from +75°F to +75°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is one of the warmest months in Honolulu, here is the comparison with other months:
Climate in Honolulu in September
Honolulu weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+86°F
+86°F
+86°F
Min. temperature
+68°F
+68°F
+59°F
Max. temperature
+91°F
+93°F
+91°F
Rainfall
20 mm
27 mm
51 mm
Wind
4 m/s
4 m/s
4 m/s
Humidity
67%
68%
70%
Air pressure
1014 HPa
1014 HPa
1014 HPa
Sunny days
7
7
6
Cloudy days
22
20
22
Rainy days
2
3
3
Snowy days
0
0
0
September weather is still as good as in August.The temperature levels stay the same in the area of +86°F for average maximum temperature during the day.Prepare for more rain. Average rainfall goes from 20 mm to 27 mm.Humidity rises from 67% to 68%.The average wind speed doesn’t change much during September, staying around 4 m/s.The amount of sunny days stay about the same, averaging 7 sunny days during the month.
October brings much the same weather, it remains good.
Wind speed in Honolulu in September based on historical data.
Last Year
Historical Data
The average wind speed is 4 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Honolulu is gradually decreasing during September, going from 5 m/s to 4 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Honolulu based on historical data.
Last Year
Historical Data
Typically, there is a 57% chance of rain on an average day in September, with total rainfall of approximately 42 mm. The maximum amount of rainfall per day is around 6 mm, which is considered light rain.September is a pretty wet month with over 17 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Honolulu wettest month is December, where a typical day has a 16% chance of precipitation and 92 mm of rainfall per day. June, on the other hand, is the driest month with a mere 3% chance of precipitation and 14 mm of rainfall per day.
How was the weather last September in Honolulu?
This is the weather in Honolulu in September 2023:
1 September
☀️
+86°F
2 September
☁️
+86°F
3 September
☀️
+86°F
4 September
☁️
+87°F
5 September
☀️
+86°F
6 September
☁️
+86°F
7 September
☁️
+86°F
8 September
☁️
+86°F
9 September
🌧️
+86°F
10 September
☁️
+86°F
11 September
☁️
+86°F
12 September
☀️
+85°F
13 September
☀️
+86°F
14 September
☀️
+86°F
15 September
☀️
+86°F
16 September
☁️
+84°F
17 September
☁️
+86°F
18 September
☁️
+86°F
19 September
☀️
+85°F
20 September
☀️
+86°F
21 September
☀️
+87°F
22 September
☀️
+86°F
23 September
☁️
+86°F
24 September
☁️
+86°F
25 September
☁️
+86°F
26 September
☀️
+85°F
27 September
☀️
+86°F
28 September
☀️
+87°F
29 September
☀️
+87°F
30 September
☀️
+87°F
In September 2023 Honolulu had 16 sunny days, 13 cloudy days, and 1 rainy days. The average maximum temperature was +86°F, with an absolute maximum of +88°F and a minimum of +84°F. The average humidity was 72%, with a maximum of 95% and a minimum of 48%. The average wind speed was 4 m/s, with a maximum of 9 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change Over the Years
This is how Honolulu climate has changed over the last 43 years.
The climate in Honolulu in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1983 (+85°F) and the highest in 1991 (+91°F). The driest year was 2003 with only 2 mm of rainfall, and the wettest year was 2015 with 138 mm.
FAQ
Frequently asked questions about the weather in Honolulu in September:
Is September a good time to visit Honolulu?
September is a really good time to go to Honolulu. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Honolulu.
Can you sunbathe in Honolulu in September?
September is warm in Honolulu. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.
Is Honolulu rainy in September?
Honolulu is usually dry in September. Plan your packing around outdoor activities and exploring.
Is it sunny in Honolulu in September?
Usually, it’s not very sunny in Honolulu in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Honolulu, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.