Wailuku weather in March
In March, Wailuku sees average daytime highs of 77°F and overnight lows near 69°F, with 1.8 in of rain across 6.7 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.
Day-to-day highs hold fairly steady near 77°F through the month. The sky is clear or mostly clear about 41% of the time in March, and the air most often feels humid.
Daylight stretches from about 11 h 36 min at the start of March to 12 h 12 min by month's end. Set against the rest of the year, March is Wailuku's 11th-clearest and 5th-windiest month. For the whole year in context, see Wailuku's year-round climate.
- Daytime high
- 77°
- 10th warmest
- Overnight low
- 69°
- 3rd coldest
- Rainfall
- 1.8 in
- 6.7 wet days
- Daylight
- 11 h 54 min
- 6:40 AM – 6:31 PM
- Cloud cover
- 51%
- 11th clearest
- Wind
- 10 mph
- 5th windiest
- Solar energy
- 5.65 kWh/m²
- Travel score
- 7.5
- out of 10
Wailuku is census-designated place in Maui County, Hawaiʻi, United States.
- Density
- 1,042/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in March
Day-to-day highs hold fairly steady near 77°F through the month.
A typical March day in Wailuku reaches about 77°F in the afternoon and slips back to 69°F overnight — a 8°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 81°F. Set against its neighbours, March runs on par with February and about 1°F cooler than April.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 |
| Avg low (°F) | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 70 | 70 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 77 | 69 |
| 2 | 77 | 69 |
| 3 | 77 | 69 |
| 4 | 77 | 69 |
| 5 | 77 | 69 |
| 6 | 77 | 69 |
| 7 | 77 | 69 |
| 8 | 77 | 69 |
| 9 | 77 | 69 |
| 10 | 77 | 69 |
| 11 | 77 | 69 |
| 12 | 77 | 69 |
| 13 | 77 | 69 |
| 14 | 77 | 69 |
| 15 | 77 | 69 |
| 16 | 77 | 69 |
| 17 | 77 | 69 |
| 18 | 77 | 69 |
| 19 | 77 | 69 |
| 20 | 77 | 69 |
| 21 | 78 | 69 |
| 22 | 78 | 69 |
| 23 | 78 | 69 |
| 24 | 78 | 69 |
| 25 | 78 | 69 |
| 26 | 78 | 69 |
| 27 | 78 | 69 |
| 28 | 78 | 69 |
| 29 | 78 | 69 |
| 30 | 78 | 70 |
| 31 | 78 | 70 |
Wailuku weather by month
How March compares with the rest of the year at a glance. March is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 77° / 69° | 1.4 | 5.6 | 10.9 | 7.9 |
| Feb | 77° / 68° | 1.2 | 5.2 | 11.3 | 7.8 |
| Mar | 77° / 69° | 1.8 | 6.7 | 11.9 | 7.5 |
| Apr | 79° / 70° | 0.8 | 3.9 | 12.5 | 7.6 |
| May | 81° / 72° | 0.5 | 3.3 | 13 | 7.7 |
| Jun | 82° / 73° | 0.2 | 1.9 | 13.2 | 7.6 |
| Jul | 83° / 74° | 0.4 | 2.7 | 13.1 | 7.0 |
| Aug | 84° / 75° | 0.5 | 2.7 | 12.7 | 6.8 |
| Sep | 84° / 75° | 0.4 | 2.2 | 12.1 | 6.8 |
| Oct | 83° / 74° | 0.7 | 3.2 | 11.5 | 7.0 |
| Nov | 80° / 72° | 1.0 | 5 | 11 | 7.4 |
| Dec | 78° / 70° | 1.6 | 5.2 | 10.8 | 7.7 |
Cloud cover in March
The sky is clear or mostly clear about 41% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 22% of March, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 67 | 67 | 66 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 64 | 64 | 64 | 64 | 62 | 62 | 62 | 62 | 62 | 62 | 61 | 61 | 62 | 62 | 63 | 63 | 64 | 64 | 65 | 65 | 65 |
| Cloudier (%) | 33 | 33 | 34 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 36 | 36 | 36 | 36 | 38 | 38 | 38 | 38 | 38 | 38 | 39 | 39 | 38 | 38 | 37 | 37 | 36 | 36 | 35 | 35 | 35 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 67 | 33 |
| 2 | 67 | 33 |
| 3 | 66 | 34 |
| 4 | 65 | 35 |
| 5 | 65 | 35 |
| 6 | 65 | 35 |
| 7 | 65 | 35 |
| 8 | 65 | 35 |
| 9 | 65 | 35 |
| 10 | 65 | 35 |
| 11 | 64 | 36 |
| 12 | 64 | 36 |
| 13 | 64 | 36 |
| 14 | 64 | 36 |
| 15 | 62 | 38 |
| 16 | 62 | 38 |
| 17 | 62 | 38 |
| 18 | 62 | 38 |
| 19 | 62 | 38 |
| 20 | 62 | 38 |
| 21 | 61 | 39 |
| 22 | 61 | 39 |
| 23 | 62 | 38 |
| 24 | 62 | 38 |
| 25 | 63 | 37 |
| 26 | 63 | 37 |
| 27 | 64 | 36 |
| 28 | 64 | 36 |
| 29 | 65 | 35 |
| 30 | 65 | 35 |
| 31 | 65 | 35 |
Chance of precipitation in March
Wailuku gets around 1.8 in of rain over 6.7 wet days in March, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 21% and peaks near 22% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 21 | 21 | 21 | 21 | 20 | 20 | 19 | 19 | 19 |
| Rain chance (%) | |
|---|---|
| 1 | 19 |
| 2 | 19 |
| 3 | 20 |
| 4 | 20 |
| 5 | 20 |
| 6 | 21 |
| 7 | 21 |
| 8 | 21 |
| 9 | 21 |
| 10 | 22 |
| 11 | 22 |
| 12 | 22 |
| 13 | 21 |
| 14 | 21 |
| 15 | 21 |
| 16 | 21 |
| 17 | 21 |
| 18 | 21 |
| 19 | 21 |
| 20 | 21 |
| 21 | 21 |
| 22 | 22 |
| 23 | 21 |
| 24 | 21 |
| 25 | 21 |
| 26 | 21 |
| 27 | 20 |
| 28 | 20 |
| 29 | 19 |
| 30 | 19 |
| 31 | 19 |
Humidity in March
Most of March feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the humid band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Comfortable (%) | 24 | 24 | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 20 | 20 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 13 | 12 | 12 | 11 | 11 | 11 |
| Humid (%) | 52 | 52 | 52 | 53 | 52 | 52 | 53 | 53 | 53 | 53 | 54 | 54 | 54 | 55 | 54 | 55 | 54 | 55 | 55 | 56 | 55 | 56 | 57 | 57 | 57 | 58 | 59 | 57 | 58 | 58 | 58 |
| Muggy (%) | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 23 | 23 | 24 | 24 | 25 | 25 | 26 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 28 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 4 | 24 | 52 | 20 | 0 |
| 2 | 4 | 24 | 52 | 20 | 0 |
| 3 | 4 | 24 | 52 | 20 | 0 |
| 4 | 4 | 23 | 53 | 20 | 0 |
| 5 | 4 | 23 | 52 | 21 | 0 |
| 6 | 4 | 23 | 52 | 21 | 0 |
| 7 | 4 | 22 | 53 | 21 | 0 |
| 8 | 4 | 22 | 53 | 21 | 0 |
| 9 | 3 | 22 | 53 | 21 | 1 |
| 10 | 3 | 22 | 53 | 21 | 1 |
| 11 | 3 | 21 | 54 | 21 | 1 |
| 12 | 3 | 21 | 54 | 21 | 1 |
| 13 | 3 | 21 | 54 | 21 | 1 |
| 14 | 3 | 20 | 55 | 21 | 1 |
| 15 | 3 | 20 | 54 | 22 | 1 |
| 16 | 3 | 19 | 55 | 22 | 1 |
| 17 | 3 | 19 | 54 | 23 | 1 |
| 18 | 3 | 18 | 55 | 23 | 1 |
| 19 | 2 | 18 | 55 | 24 | 1 |
| 20 | 2 | 17 | 56 | 24 | 1 |
| 21 | 2 | 17 | 55 | 25 | 1 |
| 22 | 2 | 16 | 56 | 25 | 1 |
| 23 | 2 | 15 | 57 | 26 | 0 |
| 24 | 2 | 15 | 57 | 26 | 0 |
| 25 | 2 | 14 | 57 | 27 | 0 |
| 26 | 2 | 13 | 58 | 27 | 0 |
| 27 | 2 | 12 | 59 | 27 | 0 |
| 28 | 2 | 12 | 57 | 28 | 1 |
| 29 | 2 | 11 | 58 | 28 | 1 |
| 30 | 2 | 11 | 58 | 28 | 1 |
| 31 | 2 | 11 | 58 | 28 | 1 |
Wind in March
Winds average 10 mph in March.
Across March, daily wind ranges from about 10 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 10 | light breeze |
| 2 | 10 | light breeze |
| 3 | 10 | light breeze |
| 4 | 10 | light breeze |
| 5 | 10 | light breeze |
| 6 | 10 | light breeze |
| 7 | 10 | light breeze |
| 8 | 10 | light breeze |
| 9 | 10 | light breeze |
| 10 | 10 | light breeze |
| 11 | 10 | light breeze |
| 12 | 10 | light breeze |
| 13 | 10 | light breeze |
| 14 | 10 | light breeze |
| 15 | 10 | light breeze |
| 16 | 10 | light breeze |
| 17 | 10 | light breeze |
| 18 | 10 | light breeze |
| 19 | 10 | light breeze |
| 20 | 10 | light breeze |
| 21 | 10 | light breeze |
| 22 | 10 | light breeze |
| 23 | 10 | light breeze |
| 24 | 10 | light breeze |
| 25 | 10 | light breeze |
| 26 | 11 | light breeze |
| 27 | 11 | light breeze |
| 28 | 11 | light breeze |
| 29 | 11 | light breeze |
| 30 | 11 | light breeze |
| 31 | 11 | light breeze |
Sunrise & sunset in March
Daylight runs from about 11 h 36 min at the start of March to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 36 minutes over March. Sunrise moves from 6:53 AM to 6:26 AM, and sunset from 6:26 PM to 6:36 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 |
| Sunrise (AM) | 6:53 | 6:52 | 6:51 | 6:50 | 6:50 | 6:49 | 6:48 | 6:47 | 6:46 | 6:45 | 6:45 | 6:44 | 6:43 | 6:42 | 6:41 | 6:40 | 6:39 | 6:38 | 6:37 | 6:36 | 6:36 | 6:35 | 6:34 | 6:33 | 6:32 | 6:31 | 6:30 | 6:29 | 6:28 | 6:27 | 6:26 |
| Sunset (PM) | 6:26 | 6:26 | 6:27 | 6:27 | 6:27 | 6:28 | 6:28 | 6:28 | 6:29 | 6:29 | 6:30 | 6:30 | 6:30 | 6:31 | 6:31 | 6:31 | 6:32 | 6:32 | 6:32 | 6:32 | 6:33 | 6:33 | 6:33 | 6:34 | 6:34 | 6:34 | 6:35 | 6:35 | 6:35 | 6:35 | 6:36 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 6:53 | 6:26 |
| 2 | 11.6 | 6:52 | 6:26 |
| 3 | 11.6 | 6:51 | 6:27 |
| 4 | 11.6 | 6:50 | 6:27 |
| 5 | 11.6 | 6:50 | 6:27 |
| 6 | 11.6 | 6:49 | 6:28 |
| 7 | 11.7 | 6:48 | 6:28 |
| 8 | 11.7 | 6:47 | 6:28 |
| 9 | 11.7 | 6:46 | 6:29 |
| 10 | 11.7 | 6:45 | 6:29 |
| 11 | 11.7 | 6:45 | 6:30 |
| 12 | 11.8 | 6:44 | 6:30 |
| 13 | 11.8 | 6:43 | 6:30 |
| 14 | 11.8 | 6:42 | 6:31 |
| 15 | 11.8 | 6:41 | 6:31 |
| 16 | 11.9 | 6:40 | 6:31 |
| 17 | 11.9 | 6:39 | 6:32 |
| 18 | 11.9 | 6:38 | 6:32 |
| 19 | 11.9 | 6:37 | 6:32 |
| 20 | 11.9 | 6:36 | 6:32 |
| 21 | 12.0 | 6:36 | 6:33 |
| 22 | 12.0 | 6:35 | 6:33 |
| 23 | 12.0 | 6:34 | 6:33 |
| 24 | 12.0 | 6:33 | 6:34 |
| 25 | 12.0 | 6:32 | 6:34 |
| 26 | 12.1 | 6:31 | 6:34 |
| 27 | 12.1 | 6:30 | 6:35 |
| 28 | 12.1 | 6:29 | 6:35 |
| 29 | 12.1 | 6:28 | 6:35 |
| 30 | 12.1 | 6:27 | 6:35 |
| 31 | 12.2 | 6:26 | 6:36 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 5.65 kWh/m².
For context, solar energy here swings from a low near 4.12 kWh/m² to a high of 6.81 kWh/m² in June across the year — March's 5.65 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.6 | 5.6 | 5.7 | 5.7 | 5.7 | 5.7 | 5.8 | 5.8 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.1 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.3 | Bright |
| 2 | 5.3 | Bright |
| 3 | 5.4 | Bright |
| 4 | 5.4 | Bright |
| 5 | 5.4 | Bright |
| 6 | 5.4 | Bright |
| 7 | 5.5 | Bright |
| 8 | 5.5 | Bright |
| 9 | 5.5 | Bright |
| 10 | 5.5 | Bright |
| 11 | 5.5 | Bright |
| 12 | 5.5 | Bright |
| 13 | 5.6 | Bright |
| 14 | 5.6 | Bright |
| 15 | 5.6 | Bright |
| 16 | 5.6 | Bright |
| 17 | 5.7 | Bright |
| 18 | 5.7 | Bright |
| 19 | 5.7 | Bright |
| 20 | 5.7 | Bright |
| 21 | 5.8 | Bright |
| 22 | 5.8 | Bright |
| 23 | 5.8 | Bright |
| 24 | 5.8 | Bright |
| 25 | 5.9 | Bright |
| 26 | 5.9 | Bright |
| 27 | 5.9 | Bright |
| 28 | 6.0 | Bright |
| 29 | 6.0 | Intense |
| 30 | 6.0 | Intense |
| 31 | 6.1 | Intense |
Hazard calendar for Wailuku
None of Wailuku's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Wailuku sits in the eastern Pacific hurricane zone; the season peaks August–September.
Is March a good time to visit Wailuku?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is one of the better times to visit Wailuku for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Wailuku in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Wailuku sees daytime highs around 77°F and nights near 69°F. Worth packing: light clothes and sun protection. About 7 days see rain.
Sea temperature near Wailuku in March
The nearest coast averages about 75°F in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 80°F and coldest in February near 75°F.
The water stays above 68°F all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 76 | 75 | 75 | 76 | 77 | 78 | 79 | 80 | 80 | 80 | 79 | 77 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 76 | Warm |
| Feb | 75 | Warm |
| Mar | 75 | Warm |
| Apr | 76 | Warm |
| May | 77 | Warm |
| Jun | 78 | Warm |
| Jul | 79 | Warm |
| Aug | 80 | Warm |
| Sep | 80 | Warm |
| Oct | 80 | Warm |
| Nov | 79 | Warm |
| Dec | 77 | Warm |
UV index in Wailuku in March
Clear-sky midday UV in March peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Wailuku peaks around July 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 6 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 7 | 9 | 11 | 13 | 10 | 11 | 12 | 12 | 12 | 10 | 7 | 6 |
| Level | High | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | High |
| Feb | 9 | Very high |
| Mar | 11 | Extreme |
| Apr | 13 | Extreme |
| May | 10 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Where is Wailuku?
Wailuku sits at 20.9°N, 156.5°W, 249 ft above sea level, in United States. The nearest listed city is Kahului, 1.9 mi away.
Topography around Wailuku
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Wailuku.
Within 2 miles, the terrain around Wailuku has large variations in elevation — a maximum elevation change of 2,749 ft around an average of 522 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,751 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,977 ft.
The land around Wailuku is covered by trees (45%), artificial surfaces (30%) and grassland (20%) within 2 miles, grassland (38%), water (34%) and trees (21%) within 10 miles, and water (82%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Wailuku (20.8913°, -156.506°, elevation 249 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).