05.09
sat
sat
Day
77°F
SW 6 mph
Precip.
9%
9%
Night
77°F
SW 1 mph
Precip.
29%
29%
06.09
sun
sun
Day
77°F
W 8 mph
Precip.
23%
23%
Night
77°F
NW 6 mph
Precip.
24%
24%
07.09
mon
mon
Day
79°F
NW 17 mph
Precip.
21%
21%
Night
79°F
N 13 mph
Precip.
11%
11%
08.09
tue
tue
Day
79°F
NW 18 mph
Precip.
21%
21%
Night
77°F
NW 7 mph
Precip.
22%
22%
09.09
wed
wed
Day
79°F
W 8 mph
Precip.
20%
20%
Night
77°F
SW 9 mph
Precip.
34%
34%
10.09
thu
thu
Day
77°F
SW 7 mph
Precip.
14%
14%
Night
75°F
W 4 mph
Precip.
38%
38%
11.09
fri
fri
Day
77°F
W 4 mph
Precip.
19%
19%
Night
75°F
NE 2 mph
Precip.
23%
23%
12.09
sat
sat
Day
77°F
SW 11 mph
Precip.
9%
9%
Night
77°F
NW 9 mph
Precip.
10%
10%
13.09
sun
sun
Day
77°F
S 12 mph
Precip.
58%
58%
Night
75°F
N 3 mph
Precip.
73%
73%
14.09
mon
mon
Day
77°F
SW 11 mph
Precip.
53%
53%
Night
75°F
S 3 mph
Precip.
36%
36%
15.09
tue
tue
Day
77°F
W 7 mph
Precip.
36%
36%
Night
75°F
NW 3 mph
Precip.
66%
66%
16.09
wed
wed
Day
79°F
W 7 mph
Precip.
23%
23%
Night
77°F
S 4 mph
Precip.
19%
19%
17.09
thu
thu
Day
77°F
S 8 mph
Precip.
34%
34%
Night
77°F
S 4 mph
Precip.
54%
54%
18.09
fri
fri
Day
77°F
SW 6 mph
Precip.
39%
39%
Night
77°F
S 6 mph
Precip.
57%
57%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 80.4°F. The highest and lowest sea temperatures during the month were 80.8°F and 80.1°F.
Air temperature in Hilo, °F
Precipitation total in Hilo, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Hilo
Hilo on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Hilo
Local time: 11:19
September 05, saturday
1200
77°F
SW
6 mph
6 mph
1500
77°F
SW
7 mph
7 mph
1800
79°F
SW
7 mph
7 mph
2100
77°F
S
2 mph
2 mph
September 06, sunday
0000
77°F
SW
1 mph
1 mph
0300
75°F
SE
2 mph
2 mph
0600
77°F
N
2 mph
2 mph
0900
77°F
NW
6 mph
6 mph
