Kauai County Climate and Average Weather
Climate of Kauai County: average temperatures, rainfall and seasons month by month.
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° | 63° | 5,2 in | ★★★★☆ |
| September | 74° | 63° | 7,7 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).
Recent extremes in Kauai County
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
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 | 121 in |
| Hanalei Bay | 8 mi | 74°F | +41°F warmer | 101 in |
| Oahu | 108 mi | 73°F | +41°F warmer | 31 in |
| Pearl Harbor National Memorial | 113 mi | 76°F | +44°F warmer | 27 in |
| Daniel K. Inouye International Airport | 116 mi | 75°F | +43°F warmer | 27 in |
Best time to visit Kauai County
Go in August. 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 this means for Kauai County
Today is slightly warmer than average for August. The forecast high of 81°F is 5.9°F above the 75°F typical for this month.
A 63% chance means rain is expected over most of the area. Plan indoor alternatives.
Visibility is down to 0,1 mi - use low beams and leave extra following distance. Wet roads are likely; braking distances roughly double in heavy rain.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 39°F - an unusually even climate through the year.
What to pack, what to skip
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 7 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.
Summary
Kauai County is a county in Hawaii. Kauai County is a county in the United States. It has a population of about 74.000.
Right now it is 67°F (19°C) in Kauai County with mainly clear. It feels like 72°F. Today runs from 65°F to 81°F. Chance of precipitation is 63%. Sightseeing conditions score 5.8/10 - fair - plan around the weather.
The best time to visit Kauai County is August. The climate is temperate. March, November and December tend to be the least comfortable months. August is the warmest month with average highs near 75°F, while February is the coldest with lows near 55°F.
The closest major airport is Daniel K. Inouye International Airport (HNL), about 116 mi away. Nearby highlights include Kauai, Hanalei Bay, Oahu and Pearl Harbor National Memorial.
In plain terms. Today is slightly warmer than average for August. The forecast high of 81°F is 5.9°F above the 75°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Kauai County today at 9.8/10. Visibility is down to 0,1 mi - use low beams and leave extra following distance. Wet roads are likely; braking distances roughly double in heavy rain.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Kauai County
| Type | County |
|---|---|
| State | Hawaii |
| Country | United States |
| Continent | North America |
| Coordinates | 22°5′47″N 159°31′34″W (22.0964, -159.5261) |
| Population | 74.000 |
| Local time | 9:10 PM (UTC-10:00) |
| Best months | August |
| Climate | Temperate |
Weather map for Kauai County
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Kauai County
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
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 67°F (19°C) with mainly clear. Humidity is 99% and wind is 2 mph.
When is the best time to visit Kauai County?
August 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 9:10 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 August 21, 2026 at 9:10 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
