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Hainan weather in September

Weather in Hainan: September

Average day temperature: 30.1°C
Average night temperature: 22.1°C
Sea water temperature: 29.4°C
Number of sunny days: 6 days
Day length: 12.0 - 12.5 hours
Number of rainy days: 17 days
Precipitation totals: 229.1 mm.

Air temperature in September, °C

Show year:
2021
2020
2019

The highest day temperature during September of 2021 was 34°C. At the same time the lowest night temperature was 20°C. Daily and nightly averages during September were 30.9°C and 21.8°C.

Sea water temperature in Hainan in September, °C

Show year:
2021
2020
2019

The average sea water temperature in September of 2021 was 29.8°C. The highest and lowest sea temperatures during the month were class="nb">30.7°C and 28.8°C.

Sunny, partly cloudy and cloudy days

Mostly all days in September are partly cloudy but sunny or cloudy days are also possible.

Precipitation total in September, mm

Precipitation total value in Hainan in September is 229.1 mm. It makes september one of the most rainy months of the year.

Wind speed in September, m/s

The average wind speed value in September is 1.5 m./s. The wind's strength is relatively same during the whole year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 6.3.

Best time for vacation in Hainan

Sunniest months:
June 13 days
May 12 days
July 10 days
Warmest months:
June 32.2 °C
May 31.7 °C
July 31.7 °C
Warmest sea temp:
July 30.2 °C
June 30.2 °C
August 30.0 °C
Coldest months:
December 20.9 °C
January 21.0 °C
February 23.1 °C
Rainiest months:
August 18 days
September 17 days
July 16 days
Windiest months:
March 1.9 m/s
April 1.9 m/s
October 1.9 m/s

Hainan on a weather map

Hainan
+26°C
NE 2 m/s
Feels like: +30°C
Precip.: 70%
Places in China:
Name
С°
+27°C
+27°C
+28°C
+37°C
+40°C
+33°C
+41°C
+35°C
+33°C
+26°C
+40°C
+24°C
+32°C
+39°C
+23°C
24 Hours Forecast
Hainan
Local time: 16:12
August 10, wednesday
1800
25°C
NE
2 m/s
2100
23°C
N
2 m/s
August 11, thursday
0000
23°C
N
2 m/s
0300
23°C
N
3 m/s
0600
23°C
N
3 m/s
0900
23°C
N
2 m/s
1200
27°C
N
2 m/s
1500
30°C
NE
1 m/s