Hawaii weather in October
The state broadly agrees with itself in October: afternoons run 89° in Kahului (Maui) and 82° in Hilo, with everywhere else in between.
Based on 5 weather stations. Five stations across four islands, all near sea level — the leeward-versus-windward difference shows up here, but upcountry and volcano-summit weather is another world these numbers don’t reach.
Oahu
Highs near 87°, nights around 74°, and 1.5 in of rain in a typical October.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Honolulu | 87° / 74° | 3 | The wet season clears its throat — nothing you'd cancel for. |
Maui
Highs near 89°, nights around 70°, and 0.8 in of rain in a typical October.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Kahului (Maui) | 89° / 70° | 2 | October keeps the warmth and quietly hands back the beaches. |
Kauai
Highs near 84°, nights around 74°, and 3.3 in of rain in a typical October.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Lihue (Kauai) | 84° / 74° | 5 | The wet half of the year eases back in. |
Big Island, Kona side
Highs near 86°, nights around 75°, and 0.9 in of rain in a typical October.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Kailua-Kona | 86° / 75° | 2 | Still summer here, with the first real rain showing up. |
Big Island, Hilo side
Highs near 82°, nights around 69°, and 10.2 in of rain in a typical October.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Hilo | 82° / 69° | 17 | Steady rain returns; the coast goes an unreasonable green. |
Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.