Kauai County Weather Forecast
Kauai County weather: 71°F, mainly clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Kauai County weather in May
Weather map for Kauai County
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Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Climate in Kauai County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 69° | 56° | 7,6 in | ★★★☆☆ |
| February | 68° | 55° | 9,2 in | ★★★☆☆ |
| March | 69° | 58° | 12,6 in | ★★☆☆☆ |
| April | 70° | 59° | 17,3 in | ★★★☆☆ |
| May | 70° | 60° | 13,5 in | ★★★☆☆ |
| June | 72° | 62° | 10,1 in | ★★★☆☆ |
| July | 73° | 62° | 11,7 in | ★★★☆☆ |
| August | 75° | 64° | 10,2 in | ★★★☆☆ |
| September | 74° | 63° | 8,8 in | ★★★☆☆ |
| October | 74° | 62° | 6,9 in | ★★★☆☆ |
| November | 71° | 60° | 9,8 in | ★★☆☆☆ |
| December | 70° | 58° | 9,6 in | ★★☆☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Best time to visit Kauai County
Go in January, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: March, November and December - expect the least comfortable mix of heat, cold or rain.
What to pack, what to skip
- A packable rain shell - 5 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid March, November and December - historically the least comfortable months here.
How Kauai County compares with nearby places
Annual averages, and the difference against Kauai County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Kauai | 0 mi | 64°F | about the same | 127 in |
| Hanalei Bay | 8 mi | 74°F | +41°F warmer | 106 in |
| Oahu | 108 mi | 73°F | +41°F warmer | 33 in |
| Pearl Harbor National Memorial | 113 mi | 76°F | +44°F warmer | 28 in |
| Daniel K. Inouye International Airport | 116 mi | 75°F | +43°F warmer | 28 in |
See the Kauai County forecast by time range
Kauai County weather - more answers
Explore Kauai County
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Frequently asked questions
Where is Kauai County?
Kauai County is a county in Hawaii. Its coordinates are 22.0964, -159.5261. It lies in North America.
What is the weather like in Kauai County right now?
It is currently 71°F (21°C) with mainly clear. Humidity is 74% and wind is 6 mph.
When is the best time to visit Kauai County?
January, September and October offer the most comfortable conditions in Kauai County, which has a temperate climate. March, November and December are usually the hardest months for outdoor plans.
What time zone is Kauai County in?
Kauai County observes Pacific/Honolulu (UTC-10:00). The local time is 6:45 PM.
How many people live in Kauai County?
Kauai County has a population of approximately 74.000.
What is the nearest airport to Kauai County?
The closest airports are Daniel K. Inouye International Airport (HNL), 116 mi away.
What are the top things to do in Kauai County?
Popular options include Kauai, Hanalei Bay, Oahu, Pearl Harbor National Memorial, Waikiki Beach and Maui.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated October 22, 2026 at 6:45 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
