Hilo in September
6.1out of 10
Possible, with caveats
Warm and comfortable: highs around 25°C. Very wet: about 22 rainy days.
25°CAvg high
22°CAvg low
22Rainy days (117 mm)
12:06 hDaylight
06:12Sunrise · 18:18 Sunset
Why this score
- Warm and comfortable: highs around 25°C
- Very wet: about 22 rainy days
What to wear and pack
- T-shirts and light layers
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±3.9 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 23°C | 20°C | 147 mm | 17 | – | – | 6.6 |
| February | 23°C | 19°C | 168 mm | 18 | – | – | 6.3 |
| March | 23°C | 20°C | 231 mm | 23 | – | – | 6.1 |
| April | 23°C | 20°C | 181 mm | 25 | – | – | 6.1 |
| May | 24°C | 21°C | 145 mm | 23 | – | – | 6.1 |
| June | 24°C | 21°C | 119 mm | 24 | – | – | 6.1 |
| July | 25°C | 22°C | 144 mm | 25 | – | – | 6.1 |
| August | 25°C | 22°C | 169 mm | 26 | – | – | 6.1 |
| September | 25°C | 22°C | 117 mm | 22 | – | – | 6.1 |
| October | 25°C | 22°C | 136 mm | 23 | – | – | 6.1 |
| November | 24°C | 21°C | 190 mm | 23 | – | – | 6.1 |
| December | 23°C | 20°C | 200 mm | 22 | – | – | 6.1 |
Frequently asked questions
How hot is Hilo in September?
Daytime highs average 25°C and nights about 22°C.
When is the best time to visit Hilo?
The best months are January, February, March, April.