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Hainan weather in September

Weather in Hainan: September

Average day temperature: 85.8°F
Average night temperature: 72.0°F
Sea water temperature: 85.0°F
Number of sunny days: 5 days
Day length: 12.0 - 12.5 hours
Number of rainy days: 15 days
Precipitation totals: 7.9 in.

Air temperature in September, °F

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2023
2022
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0
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Day temperature   
Night temperature

The highest day temperature during September of 2024 was 91°F. At the same time the lowest night temperature was 71°F. Day and night temperature averages during September were 83.2°F and 73.9°F.

Sea water temperature in Hainan in September, °F

Show year:
2024
2023
2022
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5
7
9
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25
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79
81
83
85
87
89
91
93

The average sea water temperature in September of 2024 was 85.5°F. The highest and lowest sea temperatures during the month were 87.4°F and 83.7°F.

Sunny, partly cloudy and cloudy days
Sunny days
Partly cloudy days
Cloudy days
17%
50%
33%

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

Precipitation total in September, in.

jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.8
3.5
5.3
7.1
8.9
10.6
12.4
1.5
4.7
10.4
8.0
7.2
4.7
7.2
4.2
2.7
1.1
1.8
1.5
4.7
10.4
7.3
8.0
7.2
4.7
7.2
4.2
2.7
1.1
1.8

Precipitation total value in Hainan in September is 7.3 in. Other months of the year show relatively similar values.

Wind speed in September, mph
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
0.8
1.6
2.4
3.1
3.9
4.7
5.5
3.8
3.8
4.4
3.4
4.0
4.2
3.8
4.6
4.5
4.2
3.8
3.8
3.8
4.4
3.3
3.4
4.0
4.2
3.8
4.6
4.5
4.2
3.8

The average wind speed value in September is 3.3 mph It makes September lest windy month of the year.

Average sunny hours
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.4
2.8
4.3
5.7
7.1
8.5
10.0
3.9
4.4
3.3
7.1
7.4
8.3
6.8
7.2
6.7
5.6
4.7
3.9
4.4
3.3
5.6
7.1
7.4
8.3
6.8
7.2
6.7
5.6
4.7

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: 5.6.

Best time for vacation in Hainan

Sunniest months:
June 13 days
May 12 days
April 11 days
Warmest months:
June 90.1 °F
July 89.1 °F
May 89.1 °F
Warmest sea temp:
July 86.7 °F
June 86.4 °F
August 86.3 °F
Coldest months:
December 69.3 °F
January 69.8 °F
February 74.5 °F
Rainiest months:
July 15 days
August 15 days
May 15 days
Windiest months:
March 4.4 mph
April 4.4 mph
October 4.2 mph

Hainan on a weather map

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24 Hours Forecast
Hainan
Local time: 20:10
February 13, thursday
2100
66°F
W
7 mph
February 14, friday
0000
64°F
NW
4 mph
0300
64°F
NW
4 mph
0600
64°F
W
4 mph
0900
66°F
NW
6 mph
1200
72°F
W
5 mph
1500
70°F
W
6 mph
1800
70°F
W
5 mph
Units of measurement: °C / °F