Island in Hawaii, United States
Big Island weather by month and the best time to visit
When to go to Big Island
Apr–Jun and Sep–Oct are drier with fewer crowds. Dec–Mar has higher prices and humpback whales; Hilo is rainy year-round; Mauna Kea can be snowy in winter.
Big Island weather by month
Average daily high, rainfall and conditions.
- Jan22°147 mm
- Feb22°155 mm
- Mar22°224 mm
- Apr23°192 mm
- May24°138 mm
- Jun25°106 mm
- Jul26°120 mm
- Aug26°140 mm
- Sep26°119 mm
- Oct25°135 mm
- Nov24°169 mm
- Dec22°171 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 22°C72°F | 15°C59°F | 147 mm | 84% | Pleasant |
| February | 22°C72°F | 15°C59°F | 155 mm | 84% | Pleasant |
| March | 22°C72°F | 16°C60°F | 224 mm | 84% | Rainy |
| April | 23°C74°F | 16°C61°F | 192 mm | 83% | Rainy |
| May | 24°C76°F | 17°C62°F | 138 mm | 82% | Pleasant |
| June | 25°C77°F | 17°C63°F | 106 mm | 81% | Pleasant |
| July | 26°C79°F | 18°C64°F | 120 mm | 81% | Pleasant |
| August | 26°C79°F | 18°C65°F | 140 mm | 81% | Pleasant |
| September | 26°C78°F | 18°C65°F | 119 mm | 82% | Pleasant |
| October | 25°C77°F | 18°C64°F | 135 mm | 84% | Pleasant |
| November | 24°C74°F | 17°C63°F | 169 mm | 85% | Rainy |
| December | 22°C72°F | 16°C60°F | 171 mm | 86% | Rainy |
Best months across United States
| Place | Best months | Warmest month |
|---|---|---|
| New York City | Apr–Jun, Sep–Oct | Jul (26°C) |
| Las Vegas | Mar–May, Oct–Nov | Jul (42°C) |
| Los Angeles | Mar–May, Sep–Nov | Aug (32°C) |
| Orlando | Feb–Apr, Nov | May (31°C) |
| Miami | Nov–Apr | Aug (30°C) |
| San Francisco | Apr–May, Sep–Oct | Sep (24°C) |
| Honolulu | Apr–Jun, Sep–Oct | Sep (28°C) |
| Washington, D.C. | Mar–May, Sep–Oct | Jul (31°C) |
| Chicago | May–Jun, Sep–Oct | Jul (25°C) |
| Boston | May–Jun, Sep–Oct | Jul (28°C) |
| New Orleans | Feb–Apr, Oct–Nov | Jul (30°C) |
| San Diego | Apr–May, Sep–Nov | Aug (32°C) |
| Seattle | Jun–Sep | Aug (24°C) |
| Maui | Apr–May, Sep–Oct | Sep (22°C) |
| Nashville | Apr–May, Sep–Oct | Aug (32°C) |
| Austin | Mar–May, Oct–Nov | Aug (36°C) |
| Miami Beach | Nov–Apr | Aug (30°C) |
| Key West | Dec–Apr | Aug (30°C) |
| Denver | May–Jun, Sep–Oct | Jul (33°C) |
| Philadelphia | Apr–May, Sep–Oct | Jul (30°C) |
| Portland | Jun–Sep | Aug (29°C) |
| Atlanta | Mar–May, Oct–Nov | Jul (32°C) |
| San Antonio | Mar–May, Oct–Nov | Aug (36°C) |
| Charleston | Mar–May, Oct–Nov | Jul (32°C) |
| Savannah | Mar–May, Oct–Nov | Jul (33°C) |
| Fort Lauderdale | Dec–Apr | Aug (30°C) |
| Kauai | Apr–Jun, Sep–Oct | Sep (27°C) |
| Big Island | Apr–Jun, Sep–Oct | Aug (26°C) |
| Sedona | Mar–May, Sep–Nov | Jul (35°C) |
| Scottsdale | Feb–Apr, Oct–Nov | Jul (42°C) |
Quick answers
What is the best month to visit Big Island?
Apr–Jun, Sep–Oct. Apr–Jun and Sep–Oct are drier with fewer crowds. Dec–Mar has higher prices and humpback whales; Hilo is rainy year-round; Mauna Kea can be snowy in winter.
When is the rainy season in Big Island?
Rain peaks in March with about 224 mm. Months with 150 mm or more: Feb–Apr, Nov–Dec.
What is the hottest month in Big Island?
August, with average highs of 26°C (79°F).
How cold does Big Island get?
The coolest nights are in February, averaging 15°C (59°F).
More about Big Island
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Sources
- NASA POWER climatology (2001–2020)
- Hawaii County Mass Transit Agency (Hele-On)
- Hawaii Volcanoes National Park (NPS)
- Hawaii Airports Division
- Go Hawaii: Island of Hawaii
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 2.2°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.