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Siasconset weather in September

Weather in Siasconset: September

Average day temperature: 66.9°F
Average night temperature: 66.3°F
Sea water temperature: 66.1°F
Number of sunny days: 13 days
Day length: 11.8 - 13.1 hours
Number of rainy days: 2 days
Precipitation totals: 1.0 in.

Air temperature in September, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
0
12
24
36
48
60
72
84
96
Day temperature   
Night temperature

The highest day temperature during September of 2024 was 71°F. At the same time the lowest night temperature was 56°F. Daily and nightly averages during September were 65.4°F and 64.7°F.

Sea water temperature in Siasconset in September, °F

Show year:
2024
2023
2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
56
59
62
65
68
71
74
77

The average sea water temperature in September of 2024 was 65.4°F. The highest and lowest sea temperatures during the month were 68.2°F and 60.1°F.

Sunny, partly cloudy and cloudy days
Sunny days
Partly cloudy days
Cloudy days
43%
30%
27%

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

Precipitation total in September, in.

jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
1.3
1.8
1.6
1.2
1.1
1.3
1.1
1.4
1.6
1.3
1.8
1.6
1.2
1.1
1.3
1.1
1.4
1.6

Precipitation total value in Siasconset in September is 1.0 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
3.3
6.5
9.8
13.1
16.4
19.6
22.9
18.4
18.3
15.7
13.2
12.9
13.6
15.8
17.1
19.1
18.2
19.0
18.4
18.3
15.7
15.0
13.2
12.9
13.6
15.8
17.1
19.1
18.2
19.0

The average wind speed value in September is 15.0 mph It makes September one of the least windy months of the year.

Average sunny hours
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.6
3.2
4.7
6.3
7.9
9.5
11.0
4.0
5.6
5.9
8.4
8.6
9.2
7.9
6.6
5.6
4.5
4.2
4.0
5.6
5.9
7.3
8.4
8.6
9.2
7.9
6.6
5.6
4.5
4.2

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: 7.3.

Best time for vacation in Siasconset

Sunniest months:
June 14 days
September 13 days
July 12 days
Warmest months:
August 71.3 °F
July 70.7 °F
September 66.9 °F
Warmest sea temp:
August 68.8 °F
July 66.6 °F
September 66.1 °F
Coldest months:
February 36.5 °F
January 36.9 °F
March 40.4 °F
Rainiest months:
January 4 days
October 4 days
April 3 days
Windiest months:
March 19.1 mph
January 19.0 mph
December 18.4 mph

Siasconset on a weather map

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24 Hours Forecast
Siasconset
Local time: 01:44
April 15, tuesday
0300
46°F
N
13 mph
0600
46°F
NE
14 mph
0900
45°F
N
14 mph
1200
46°F
NE
14 mph
1500
46°F
NE
17 mph
1800
46°F
NE
32 mph
2100
46°F
NE
25 mph
April 16, wednesday
0000
46°F
E
27 mph
Units of measurement: °C / °F