Climate Chart of Kauai (Hawaii), USA
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For Kauai (Hawaii), USA, the climate data cover 2013–2023. The monthly mean temperature stays within a relatively narrow range across the year, while rainfall and sunshine each have their own month-to-month variation. These averages offer a broad guide to the annual pattern rather than a forecast for any particular visit: monthly temperature means are not daytime highs, and daily rainfall and sunshine averages do not describe conditions on every day.
Climate overview
Temperature
February has the lowest monthly mean temperature, at 21.6 °C; for visitors who prefer cooler average conditions, this is the clearest temperature-based point of reference. The highest monthly mean comes in September, at 25.3 °C, so the annual temperature pattern is comparatively contained between these two monthly averages. The unweighted mean of the monthly means is 23.5 °C. These figures describe monthly averages, not daytime maximum temperatures or the temperature on any specific day.
Rain
Mean daily rainfall reaches its highest monthly value in March, at 4.02 mm/day, a useful cue to prepare for rain if travelling then. Its lowest monthly value is in January, at 2.66 mm/day, which may suit visitors prioritising lower average rainfall. The unweighted mean across monthly daily averages is 3.53 mm/day. These are daily mean amounts, not monthly totals; they do not show how often rain falls or guarantee dry or wet days in either month.
Sunshine
Average daily sunshine is highest in June, at 12.28 hours/day, and lowest in December, at 9.08 hours/day. The unweighted mean across the monthly averages is 10.70 hours/day. For outdoor sightseeing, these figures can help indicate when average sunshine duration is greater or lower, but they are not measures of daylight length and cannot predict the sunshine on a particular day.
Best Travel Time Guide for Kauai (Hawaii), USA: Ideal Seasons and Weather Insights
If lower average rainfall is your priority, January is the conditional option, with mean daily rainfall of 2.66 mm/day. This is a monthly average rather than a promise of dry weather, so it is still sensible to be prepared for changing conditions. For cooler monthly mean temperatures, consider February, when the mean is 21.6 °C. This can guide a preference for cooler average conditions, but it does not tell you the daytime high or the temperature during your specific travel dates.
Rain preparation is particularly relevant in March, the month with the highest mean daily rainfall at 4.02 mm/day; the average cannot establish the likelihood of rain on any individual day. For daylight outdoor planning, average daily sunshine peaks in June at 12.28 hours/day, while December has the lowest value at 9.08 hours/day. Sunshine duration is not day length, and neither figure guarantees the conditions you will encounter.
Climate Data Overview for Kauai (Hawaii), USA
Explore the comprehensive climate data for Kauai (Hawaii), USA. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.
| Month | Average: Temperature °C | Rain (mm) / day | Snow (mm) / day | Sunshine (h) / day |
|---|---|---|---|---|
| Jan | 21.9 | 2.66 | 0.00 | 9.53 |
| Feb | 21.6 | 3.56 | 0.00 | 9.66 |
| Mar | 21.7 | 4.02 | 0.00 | 10.17 |
| Apr | 22.6 | 3.36 | 0.00 | 10.95 |
| May | 23.3 | 3.76 | 0.00 | 11.85 |
| Jun | 24.2 | 3.88 | 0.00 | 12.28 |
| Jul | 24.8 | 3.90 | 0.00 | 12.23 |
| Aug | 25.2 | 3.73 | 0.00 | 11.62 |
| Sep | 25.3 | 3.38 | 0.00 | 11.01 |
| Oct | 24.7 | 3.31 | 0.00 | 10.29 |
| Nov | 23.7 | 3.08 | 0.00 | 9.77 |
| Dec | 22.6 | 3.76 | 0.00 | 9.08 |
| Average | 23.5 | 3.53 | 0.00 | 10.70 |
