Island in Hawaii, United States
Kauai weather by month and the best time to visit
When to go to Kauai
Apr–Jun and Sep–Oct are the driest, with calmer seas. Winter brings big north-shore surf and heavy rain; Dec–Mar is humpback whale season.
Kauai weather by month
Average daily high, rainfall and conditions.
- Jan24°68 mm
- Feb23°84 mm
- Mar24°125 mm
- Apr24°57 mm
- May25°49 mm
- Jun26°43 mm
- Jul26°41 mm
- Aug27°47 mm
- Sep27°51 mm
- Oct27°76 mm
- Nov26°84 mm
- Dec24°100 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 24°C75°F | 22°C72°F | 68 mm | 76% | Pleasant |
| February | 23°C74°F | 22°C71°F | 84 mm | 76% | Pleasant |
| March | 24°C74°F | 22°C71°F | 125 mm | 77% | Pleasant |
| April | 24°C76°F | 22°C72°F | 57 mm | 77% | Pleasant |
| May | 25°C77°F | 23°C74°F | 49 mm | 76% | Pleasant |
| June | 26°C79°F | 24°C76°F | 43 mm | 77% | Pleasant |
| July | 26°C80°F | 25°C77°F | 41 mm | 77% | Pleasant |
| August | 27°C80°F | 25°C77°F | 47 mm | 77% | Pleasant |
| September | 27°C81°F | 25°C78°F | 51 mm | 76% | Pleasant |
| October | 27°C80°F | 25°C77°F | 76 mm | 76% | Pleasant |
| November | 26°C78°F | 24°C75°F | 84 mm | 77% | Pleasant |
| December | 24°C76°F | 23°C73°F | 100 mm | 77% | Pleasant |
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 Kauai?
Apr–Jun, Sep–Oct. Apr–Jun and Sep–Oct are the driest, with calmer seas. Winter brings big north-shore surf and heavy rain; Dec–Mar is humpback whale season.
When is the rainy season in Kauai?
Rain peaks in March with about 125 mm. No month averages 150 mm or more.
What is the hottest month in Kauai?
September, with average highs of 27°C (81°F).
How cold does Kauai get?
The coolest nights are in February, averaging 22°C (71°F).
More about Kauai
Going to Kauai solo?
SoloSquare is where travelers, nomads and locals in Kauai meet up for small plans: coffee, dinners, walks and day trips. Join one, or start your own in a minute.
Sources
- NASA POWER climatology (2001–2020)
- Lihue Airport (Hawaii Department of Transportation)
- Kauai Visitors Bureau
- Haena State Park reservations
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. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.