05.09
sat
sat
Day
77°F
SW 6 mph
Precip.
21%
21%
Night
77°F
NE 2 mph
Precip.
56%
56%
06.09
sun
sun
Day
77°F
NW 11 mph
Precip.
41%
41%
Night
77°F
NW 6 mph
Precip.
24%
24%
07.09
mon
mon
Day
79°F
NW 17 mph
Precip.
21%
21%
Night
77°F
N 15 mph
Precip.
18%
18%
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 9 mph
Precip.
8%
8%
Night
77°F
SW 11 mph
Precip.
40%
40%
10.09
thu
thu
Day
77°F
SW 7 mph
Precip.
16%
16%
Night
75°F
E 2 mph
Precip.
16%
16%
11.09
fri
fri
Day
77°F
W 8 mph
Precip.
15%
15%
Night
75°F
E 3 mph
Precip.
14%
14%
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: 11:36
September 05, saturday
1200
77°F
SW
6 mph
6 mph
1500
79°F
SW
9 mph
9 mph
1800
79°F
SW
6 mph
6 mph
2100
77°F
SE
2 mph
2 mph
September 06, sunday
0000
77°F
NE
2 mph
2 mph
0300
77°F
N
2 mph
2 mph
0600
75°F
N
2 mph
2 mph
0900
77°F
NW
4 mph
4 mph
