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Hong Kong in September: Weather, Average temperature and Climate

Discover the weather for Hong Kong in September and if it’s a good time to travel (based on historical data).
Check flight prices to Hong Kong on Avionero:
September

Weather in Hong Kong in September 2024

OK Weather
Warm
🌧️
Rainy
If you plan to visit Hong Kong in September, the weather is typically alright, with an average high temperature of +84°F during the day and approximately 5 sunny days. Expect some rainy, though, as there are typically 13 rainy days in the month and around 217 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flights in one click on Avionero.
Good to know:
  • September is usually the hottest month of the year in Hong Kong;

Average weather

☀️
+84°F
Avg. max. temperature
+64°F
Min.
+93°F
Max.
217 mm
Total precipitation
78%
Avg. humidity
2 m/s
Avg. wind
5 ☀️
Sunny Days
12 ⛅️
Cloudy
13 🌦
Rainy
Our opinion: Hong Kong has OK weather in September.

Average temperature in Hong Kong in September

Here are the expected maximum, average and minimum temperatures in Hong Kong for September based on the historical data.
Last Year
Historical Data

Going from a maximum of +91°F during the day to a minimum of +73°F during the night, the temperature in September averages around +86°F.

The average maximum temperature goes down 60% by the end of the month, compared with the beginning of the month, from +88°F to +77°F.

Is Hong Kong warm or cold in September?

Hong Kong is typically warm in September.

Maximum temperatures go down compared to the previous month from +84°F to +84°F. The minimum temperature also goes down from +77°F to +75°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

September is the hottest month in Hong Kong, here is the comparison with other months:

Climate in Hong Kong in September

Hong Kong weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+84°F+84°F+79°F
Min. temperature
+70°F+64°F+54°F
Max. temperature
+95°F+93°F+91°F
Rainfall
324 mm217 mm77 mm
Wind
2 m/s2 m/s3 m/s
Humidity
81%78%72%
Air pressure
1004 HPa1007 HPa1013 HPa
Sunny days
3511
Cloudy days
91215
Rainy days
19135
Snowy days
000

September weather is still as ok as in August. The temperature levels stay the same in the area of +84°F for average maximum temperature during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 324 mm to 217 mm. It feels drier, as humidity decreases from 81% to 78%. The average wind speed doesn’t change much during September, staying around 2 m/s. The good news is there are likely to be more sunny days in September, from 3 to 5.

But maybe it is worth considering traveling in October as the weather gets better.

Wind

Wind speed in Hong Kong in September based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.

The average wind speed in Hong Kong is gradually increasing during September, going from 3 m/s to 8 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Hong Kong based on historical data.
Last Year
Historical Data
Typically, there is a 47% chance of rain on an average day in September, with total rainfall of approximately 205 mm. The maximum amount of rainfall per day is around 88 mm, which is considered heavy rain. September is a pretty wet month with over 14 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:
Hong Kong wettest month is August, where a typical day has a 61% chance of precipitation and 324 mm of rainfall per day. January, on the other hand, is the driest month with a mere 6% chance of precipitation and 23 mm of rainfall per day.

How was the weather last September in Hong Kong?

This is the weather in Hong Kong in September 2023:
1 September
☁️
+87°F
2 September
☁️
+88°F
3 September
☀️
+88°F
4 September
☁️
+90°F
5 September
☀️
+90°F
6 September
☀️
+87°F
7 September
🌧️
+83°F
8 September
☁️
+85°F
9 September
☁️
+87°F
10 September
☁️
+84°F
11 September
☁️
+88°F
12 September
☀️
+91°F
13 September
☀️
+92°F
14 September
☀️
+91°F
15 September
☀️
+90°F
16 September
☀️
+89°F
17 September
☁️
+90°F
18 September
🌧️
+89°F
19 September
☀️
+88°F
20 September
☁️
+86°F
21 September
☁️
+85°F
22 September
☀️
+85°F
23 September
☁️
+85°F
24 September
☀️
+84°F
25 September
☀️
+84°F
26 September
☁️
+85°F
27 September
☁️
+87°F
28 September
☁️
+86°F
29 September
🌧️
+84°F
30 September
☁️
+78°F
In September 2023 Hong Kong had 12 sunny days, 15 cloudy days, and 3 rainy days. The average maximum temperature was +86°F, with an absolute maximum of +91°F and a minimum of +77°F. The average humidity was 72%, with a maximum of 96% and a minimum of 41%. The average wind speed was 3 m/s, with a maximum of 12 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Hong Kong climate has changed over the last 43 years.

The climate in Hong Kong in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1997 (+82°F) and the highest in 2019 (+92°F). The driest year was 1995 with only 74 mm of rainfall, and the wettest year was 2014 with 452 mm.

FAQ

Frequently asked questions about the weather in Hong Kong in September:

Is September a good time to visit Hong Kong?

It’s always a good time to visit Hong Kong, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Hong Kong in September?

September is warm in Hong Kong. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Is Hong Kong rainy in September?

Hong Kong is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Hong Kong in September?

Usually, it’s not very sunny in Hong Kong in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Monthly weather in Hong Kong

Source of the data

For this page, we’ve looked at the typical weather in Hong Kong, 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.