The best times to visit Niihau for ideal weather are
December 17th to April 22nd
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Niihau Travel Guide
Other Niihau Travel Info
Weather in Niihau
Temperature
Average temperatures in Niihau vary very little. Considering humidity, temperatures feel hot for about half of the year and otherwise nice with a very low chance of rain throughout the year. The area is somewhat temperate — in the 57th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Niihau, the hottest months are August, September, and then July. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 87.4°F (30.8°C) with temperatures rarely dropping below 73.3°F (22.9°C) at night.
Niihau Temperatures (Fahrenheit)
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Niihau Temperatures (Celsius)
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“Feels-Like” Temperatures
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Niihau Perceived Temperature (F)
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Niihau Perceived Temperature (C)
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Average Niihau Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
Show Fahrenheit
| Month | Avg. High (°F) | Avg. Mean (°F) | Avg. Low (°F) |
|---|---|---|---|
| Jan | 79.9 | 72.6 | 65.5 |
| Feb | 80.3 | 73.2 | 66.3 |
| Mar | 81 | 73.3 | 65.9 |
| Apr | 82.5 | 74.9 | 67.4 |
| May | 83.9 | 76.9 | 69.4 |
| Jun | 85.7 | 78.5 | 71 |
| Jul | 86.6 | 79.4 | 72.1 |
| Aug | 87.1 | 79.8 | 72.4 |
| Sep | 87.2 | 79.5 | 72.3 |
| Oct | 86.2 | 78.6 | 71.6 |
| Nov | 84.1 | 76.2 | 69 |
| Dec | 81.9 | 74.4 | 67.3 |
Show Celsius
| Month | Avg. High (°C) | Avg. Mean (°C) | Avg. Low (°C) |
|---|---|---|---|
| Jan | 26.6 | 22.6 | 18.6 |
| Feb | 26.8 | 22.9 | 19.1 |
| Mar | 27.2 | 22.9 | 18.8 |
| Apr | 28.1 | 23.8 | 19.7 |
| May | 28.8 | 24.9 | 20.8 |
| Jun | 29.8 | 25.8 | 21.7 |
| Jul | 30.3 | 26.3 | 22.3 |
| Aug | 30.6 | 26.6 | 22.4 |
| Sep | 30.7 | 26.4 | 22.4 |
| Oct | 30.1 | 25.9 | 22 |
| Nov | 28.9 | 24.6 | 20.6 |
| Dec | 27.7 | 23.6 | 19.6 |
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Niihau are July, June, and then August. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid July. For example, on the week of July 9th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early December with an average of 1 days of significant precipitation the week of December 3rd.
When can you find snow in Niihau? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Niihau.
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Snow on the Ground
The graph below shows the average snow on the ground in Niihau (in).
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Average Rain and Snow by Month
Show Inches
| Month | Daily Chance of Rain | Average Snow Depth (in) | Total Precipitation (in) |
|---|---|---|---|
| Jan | 9% | 0 | 1.5 |
| Feb | 14% | 0 | 2.2 |
| Mar | 7% | 0 | 0.8 |
| Apr | 7% | 0 | 1 |
| May | 7% | 0 | 1.2 |
| Jun | 4% | 0 | 0.3 |
| Jul | 4% | 0 | 0.3 |
| Aug | 4% | 0 | 0.7 |
| Sep | 6% | 0 | 0.6 |
| Oct | 8% | 0 | 0.8 |
| Nov | 7% | 0 | 1.8 |
| Dec | 12% | 0 | 3.6 |
Show Centimeters
| Month | Daily Chance of Rain | Average Snow Depth (cm) | Total Precipitation (cm) |
|---|---|---|---|
| Jan | 9 | 0 | 3.8 |
| Feb | 14 | 0 | 5.6 |
| Mar | 7 | 0 | 2 |
| Apr | 7 | 0 | 2.5 |
| May | 7 | 0 | 3 |
| Jun | 4 | 0 | 0.8 |
| Jul | 4 | 0 | 0.8 |
| Aug | 4 | 0 | 1.8 |
| Sep | 6 | 0 | 1.5 |
| Oct | 8 | 0 | 2 |
| Nov | 7 | 0 | 4.6 |
| Dec | 12 | 0 | 9.1 |
Humidity and Wind
Niihau has some high humidity months, with other comfortably humid months. The least humid month is August (51.3% relative humidity), and the most humid month is December (62.9%).
Wind in Niihau is usually calm. The windiest month is February, followed by January and March. February’s average wind speed of around 6.4 knots (7.4 MPH or 11.9 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid February where average top sustained speeds reach 14.9 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Niihau.
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Wind
The graph below shows wind speed (max and average) in knots.
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Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
| Month | Avg. Wind | Avg. Wind Feel | Sustained High Wind | High Wind Feel |
| Jan | 6.4 | Light breeze | 13.7 | Significant breeze |
| Feb | 6.4 | Light breeze | 13.7 | Significant breeze |
| Mar | 6.2 | Light breeze | 13.6 | Significant breeze |
| Apr | 5.4 | Light breeze | 12.2 | Significant breeze |
| May | 5.1 | Light breeze | 11.5 | Significant breeze |
| Jun | 4.5 | Light breeze | 10.5 | Gentle breeze |
| Jul | 4.5 | Light breeze | 10.5 | Significant breeze |
| Aug | 4.5 | Light breeze | 10.6 | Gentle breeze |
| Sep | 4.5 | Light breeze | 10.4 | Significant breeze |
| Oct | 4.7 | Light breeze | 11 | Significant breeze |
| Nov | 5 | Light breeze | 11.7 | Significant breeze |
| Dec | 5.3 | Light breeze | 12.3 | Significant breeze |
Show Relative Humidity by Month
| Month | Avg. Relative Humidity |
|---|---|
| Jan | 60.3% |
| Feb | 58.6% |
| Mar | 56.6% |
| Apr | 56.7% |
| May | 55.9% |
| Jun | 54.7% |
| Jul | 52.7% |
| Aug | 51.3% |
| Sep | 55.7% |
| Oct | 57.4% |
| Nov | 56.2% |
| Dec | 62.9% |
Is it Safe to Travel to Niihau?
Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.
The Busiest and Least Crowded Months
The busiest month for tourism in Niihau, the United States is July, followed by March and February. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Niihau in June. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
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Overall Niihau Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 85°F (29.4°C) and 80.2°F (26.8°C) with warmer temperatures in the later months. Rain is rare with roughly 2 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the least precipitation with about 1 days of precipitation per month. June – August is fairly slow season for tourism in Niihau, so lodging and other accommodations may cost slightly less.
Fall (September through November)
Fall daily highs range from 87.3°F (30.7°C) and 82.7°F (28.2°C), which will feel very nice given the humidity and wind. It rains or snows a normal amount: approximately 2 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is perfect this time of year in Niihau to be enjoyable for warm weather travelers. The average high during this season is between 82.1°F (27.8°C) and 79.3°F (26.3°C). On average, it rains or snows a smalll amount: 3 to 4 times per month. These times of year are the busiest with tourists.
Best Times to Travel› the United States › Niihau, the United States