Hawaii weather in July
The state broadly agrees with itself in July: afternoons run 89° in Kahului (Maui) and 83° 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 88°, nights around 75°, and 0.5 in of rain in a typical July.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Honolulu | 88° / 75° | 1 | The trades work overtime, and you'll want them to. |
Maui
Highs near 89°, nights around 72°, and 0.5 in of rain in a typical July.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Kahului (Maui) | 89° / 72° | 2 | Hot, dry, and windy by dinnertime — a fair trade. |
Kauai
Highs near 85°, nights around 75°, and 1.8 in of rain in a typical July.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Lihue (Kauai) | 85° / 75° | 5 | Warm through and through; the rain never really commits. |
Big Island, Kona side
Highs near 86°, nights around 75°, and 0.5 in of rain in a typical July.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Kailua-Kona | 86° / 75° | 1 | Peak summer here: flat water, hot pavement, no rain. |
Big Island, Hilo side
Highs near 83°, nights around 70°, and 9.2 in of rain in a typical July.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Hilo | 83° / 70° | 19 | Rain most days, sun most days, both before lunch. |
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.