March is one of the cooler months of the year in Kailua, with average highs near 23.8°C and lows around 22.2°C (mean 23°C). It is a relatively wet time of year, averaging 68 mm of rainfall and 76% relative humidity across the period.
March is one of the cooler months of the year in Kailua. Across 45 years of records, the warmest March in Kailua was 2025 — when the month averaged 24.7°C — while the coldest were 1982, 1990 and 1993 at 22°C. Typical March days reach 23.8°C with nights near 22.2°C. The long-term trend is warming, about 0.3°C per decade.
March is a relatively wet time of year in Kailua, averaging 68 mm of rainfall. The wettest March on record was 2006 with 282 mm, while the driest was 1993 at 9 mm.
Relative humidity in Kailua during March averages 76%. The most humid March was 2006 at 84%, and the least humid were 1992 and 1998 at 73%.
March receives about 5.5 kWh/m²/day of solar energy in Kailua. The sunniest Marchs were 2000, 2008 and 2025 at 6.2 kWh/m²/day, and the cloudiest was 2006 at 3.8.
Average wind speed in Kailua during March is 5.7 m/s. The windiest March was 1985 at 7.9 m/s, while the calmest was 2017 at 4.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.7°C | 22.6°C | 23.1°C | 23.0°C | 23.8°C | +1.1°C |
| Avg High | 23.5°C | 23.4°C | 23.9°C | 23.8°C | 24.7°C | +1.2°C |
| Avg Low | 21.9°C | 21.8°C | 22.3°C | 22.2°C | 23.0°C | +1.1°C |
| Avg Rain | 84 mm | 41 mm | 74 mm | 67 mm | 82 mm | -2 mm |
March temperatures in Kailua have risen by about 1.3°C between 1981–1985 and 2021–2025.
March has ranged from a record low of 18.9°C (2009) to a record high of 26.6°C (2025).
Rainfall in March is a relatively wet time of year, averaging 68 mm, with a wettest year of 282 mm.
One of the best times to visit Kailua
March is one of the best times to visit Kailua. Expect days averaging 23.8°C and nights around 22.2°C (mean 23°C) — cooler than Kailua's yearly average — with moderate rainfall (68 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🔥 | 25.7°C | 24.7°C | 23.7°C | 26.6°C | 23.1°C | 20 mm | 75% | 5.3 m/s | 6.2 |
| 2024 | 24.1°C | 23.3°C | 22.5°C | 25.4°C | 20.7°C | 38 mm | 74% | 6.7 m/s | 5.8 |
| 2023 | 25.0°C | 24.1°C | 23.3°C | 26.0°C | 22.1°C | 73 mm | 78% | 4.3 m/s | 5.5 |
| 2022 | 25.3°C | 24.3°C | 23.3°C | 26.1°C | 22.2°C | 40 mm | 76% | 4.7 m/s | 6.1 |
| 2021 | 24.0°C | 23.3°C | 22.6°C | 25.3°C | 21.8°C | 166 mm | 78% | 6.2 m/s | 5.5 |
| 2020 | 24.1°C | 23.4°C | 22.8°C | 25.5°C | 21.9°C | 155 mm | 79% | 5.8 m/s | 5.2 |
| 2019 | 23.4°C | 22.5°C | 21.6°C | 24.8°C | 19.5°C | 32 mm | 74% | 5.4 m/s | 5.9 |
| 2018 | 23.5°C | 22.7°C | 22.0°C | 25.8°C | 20.5°C | 96 mm | 79% | 4.9 m/s | 4.8 |
| 2017 | 24.9°C | 24.0°C | 23.1°C | 25.8°C | 21.5°C | 52 mm | 78% | 4.2 m/s | 6.1 |
| 2016 | 24.5°C | 23.5°C | 22.4°C | 26.0°C | 20.5°C | 42 mm | 73% | 4.3 m/s | 5.9 |
| 2015 | 23.5°C | 22.6°C | 21.8°C | 25.6°C | 19.7°C | 61 mm | 76% | 5.1 m/s | 5.5 |
| 2014 | 24.1°C | 23.2°C | 22.3°C | 25.6°C | 20.8°C | 69 mm | 76% | 5.2 m/s | 5.5 |
| 2013 | 23.2°C | 22.4°C | 21.5°C | 25.0°C | 19.9°C | 78 mm | 74% | 4.4 m/s | 5.4 |
| 2012 | 23.5°C | 22.7°C | 22.0°C | 24.6°C | 21.0°C | 145 mm | 77% | 7 m/s | 5.4 |
| 2011 | 24.2°C | 23.6°C | 22.9°C | 25.3°C | 22.2°C | 68 mm | 77% | 6.6 m/s | 5.6 |
| 2010 | 23.5°C | 22.8°C | 22.1°C | 24.6°C | 20.7°C | 26 mm | 75% | 7.2 m/s | 5.8 |
| 2009 | 22.8°C | 22.1°C | 21.5°C | 23.9°C | 18.9°C | 78 mm | 77% | 6.8 m/s | 5.2 |
| 2008 | 24.5°C | 23.7°C | 22.9°C | 25.4°C | 22.5°C | 11 mm | 75% | 5.9 m/s | 6.2 |
| 2007 | 24.6°C | 23.8°C | 22.9°C | 25.7°C | 21.7°C | 13 mm | 76% | 5 m/s | 5.7 |
| 2006 🌧️ | 23.9°C | 23.3°C | 22.7°C | 24.9°C | 21.7°C | 282 mm | 84% | 5 m/s | 3.8 |
| 2005 | 23.7°C | 22.8°C | 21.9°C | 25.5°C | 20.1°C | 85 mm | 75% | 5.5 m/s | 5.4 |
| 2004 | 23.7°C | 23.0°C | 22.3°C | 25.6°C | 20.3°C | 120 mm | 79% | 6.2 m/s | 5.1 |
| 2003 | 24.8°C | 23.9°C | 22.9°C | 26.0°C | 21.9°C | 55 mm | 76% | 4.6 m/s | 5.7 |
| 2002 | 23.4°C | 22.5°C | 21.6°C | 24.8°C | 19.6°C | 64 mm | 77% | 5.3 m/s | 5.6 |
| 2001 | 23.7°C | 22.9°C | 22.1°C | 25.4°C | 20.3°C | 14 mm | 73% | 5.6 m/s | 5.9 |
| 2000 | 23.7°C | 22.9°C | 22.1°C | 24.6°C | 21.3°C | 14 mm | 74% | 6.2 m/s | 6.2 |
| 1999 | 23.2°C | 22.6°C | 21.9°C | 24.4°C | 21.3°C | 29 mm | 75% | 7.6 m/s | 5.9 |
| 1998 | 24.5°C | 23.6°C | 22.7°C | 26.1°C | 20.4°C | 10 mm | 73% | 5.4 m/s | 6 |
| 1997 | 24.1°C | 23.3°C | 22.5°C | 25.8°C | 20.9°C | 47 mm | 78% | 6.3 m/s | 5.5 |
| 1996 | 22.8°C | 22.1°C | 21.3°C | 25.0°C | 19.8°C | 22 mm | 74% | 5.2 m/s | 5.8 |
| 1995 | 24.0°C | 23.1°C | 22.3°C | 25.2°C | 20.6°C | 24 mm | 75% | 5.4 m/s | 5.6 |
| 1994 | 23.2°C | 22.5°C | 21.7°C | 25.5°C | 20.2°C | 63 mm | 74% | 6.4 m/s | 4.9 |
| 1993 | 22.7°C | 22.0°C | 21.2°C | 24.4°C | 19.3°C | 9 mm | 74% | 6.4 m/s | 5.6 |
| 1992 | 23.5°C | 22.7°C | 21.9°C | 24.9°C | 21.0°C | 14 mm | 73% | 5.6 m/s | 5.6 |
| 1991 | 22.7°C | 22.1°C | 21.5°C | 24.3°C | 20.2°C | 127 mm | 76% | 7.1 m/s | 4.7 |
| 1990 | 22.8°C | 22.0°C | 21.3°C | 24.1°C | 19.0°C | 62 mm | 76% | 6.1 m/s | 5.1 |
| 1989 | 23.8°C | 23.1°C | 22.4°C | 25.5°C | 20.6°C | 66 mm | 79% | 5.2 m/s | 5.3 |
| 1988 | 23.8°C | 23.1°C | 22.3°C | 25.2°C | 20.8°C | 46 mm | 78% | 5.5 m/s | 5.7 |
| 1987 | 22.9°C | 22.1°C | 21.2°C | 24.6°C | 19.5°C | 25 mm | 76% | 5.8 m/s | 5.4 |
| 1986 | 23.7°C | 23.0°C | 22.3°C | 25.3°C | 20.5°C | 48 mm | 82% | 5.5 m/s | 5.1 |
| 1985 | 22.7°C | 22.1°C | 21.5°C | 23.5°C | 20.9°C | 62 mm | 75% | 7.9 m/s | 5.2 |
| 1984 | 24.3°C | 23.5°C | 22.7°C | 25.1°C | 21.7°C | 176 mm | 76% | 4.8 m/s | 5.8 |
| 1983 | 23.3°C | 22.4°C | 21.6°C | 24.5°C | 19.1°C | 163 mm | 76% | 4.4 m/s | — |
| 1982 ❄️ | 22.7°C | 22.0°C | 21.4°C | 24.6°C | 20.1°C | 147 mm | 80% | 5.8 m/s | — |
| 1981 | 23.9°C | 23.0°C | 22.1°C | 24.9°C | 20.4°C | 25 mm | 74% | 5.4 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 23.8°C with lows near 22.2°C (mean 23°C), based on 45 years of NASA POWER data.
March averages 68 mm of rainfall in Kailua, a relatively wet time of year. The wettest on record was 282 mm in 2006.
The hottest March reached 26.6°C in 2025. The coldest dipped to 18.9°C in 2009.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.3°C. Daytime highs moved from 23.4°C to 24.8°C and overnight lows from 21.9°C to 23.1°C over the same span.
March is one of the cooler months of the year in Kailua and a relatively wet time of year, so plan for around 23.8°C daytime highs and 22.2°C at night.
Not quite — March is the 2nd coolest month in Kailua, averaging 23°C.
For March in Kailua, pack light layers you can adjust through the day, with typical highs of 23.8°C and lows of 22.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 76% — quite humid.
Average wind speed in March is 5.7 m/s. The windiest March on record averaged 7.9 m/s (1985).
The wettest March on record was 2006 with 282 mm. On average, March sees 68 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Kailua behaves each March, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for March specifically, along with year-by-year records and how the month has changed over the decades.
