March is one of the warmer months of the year in Onslow, with average highs near 32.3°C and lows around 27°C (mean 29.7°C). It is a relatively wet time of year, averaging 47 mm of rainfall and 65% relative humidity across the period.
March is one of the warmer months of the year in Onslow. Across 45 years of records, the warmest March in Onslow was 2025 — when the month averaged 31.7°C — while the coldest was 1993 at 28°C. Typical March days reach 32.3°C with nights near 27°C. The long-term trend is warming, about 0.2°C per decade.
March is a relatively wet time of year in Onslow, averaging 47 mm of rainfall. The wettest March on record was 2008 with 312 mm, while the driest was 1993 at 0 mm.
Relative humidity in Onslow during March averages 65%. The most humid March was 2000 at 79%, and the least humid was 1993 at 60%.
March receives about 6.3 kWh/m²/day of solar energy in Onslow. The sunniest March was 2001 at 7.1 kWh/m²/day, and the cloudiest was 2000 at 5.3.
Average wind speed in Onslow during March is 4.3 m/s. The windiest March was 2000 at 5 m/s, while the calmest was 1995 at 3.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.6°C | 29.3°C | 29.5°C | 29.8°C | 30.3°C | +0.7°C |
| Avg High | 32.3°C | 32.2°C | 32.0°C | 32.3°C | 32.8°C | +0.5°C |
| Avg Low | 26.9°C | 26.4°C | 27.0°C | 27.3°C | 27.8°C | +0.9°C |
| Avg Rain | 29 mm | 35 mm | 91 mm | 40 mm | 34 mm | +5 mm |
March temperatures in Onslow have risen by about 1°C between 1981–1985 and 2021–2025.
March has ranged from a record low of 21.7°C (1993) to a record high of 39.5°C (1988).
Rainfall in March is a relatively wet time of year, averaging 47 mm, with a wettest year of 312 mm.
A quieter season to visit Onslow
If your dates are flexible, the more temperate months of September and August tend to be the most comfortable for visiting Onslow. That said, March — with days averaging 32.3°C and nights around 27°C (mean 29.7°C) and moderate rainfall (47 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🔥 | 34.4°C | 31.7°C | 29.0°C | 38.8°C | 25.5°C | 14 mm | 63% | 3.9 m/s | 6.3 |
| 2024 | 32.2°C | 29.9°C | 27.5°C | 35.0°C | 25.6°C | 16 mm | 68% | 4.4 m/s | 6.4 |
| 2023 | 32.7°C | 30.1°C | 27.5°C | 36.5°C | 25.1°C | 23 mm | 65% | 4 m/s | 6.4 |
| 2022 | 32.8°C | 30.4°C | 28.0°C | 37.5°C | 25.7°C | 35 mm | 64% | 4.1 m/s | 5.9 |
| 2021 | 31.4°C | 29.1°C | 26.9°C | 34.8°C | 24.4°C | 39 mm | 66% | 4 m/s | 6.5 |
| 2020 | 33.1°C | 30.4°C | 27.7°C | 36.5°C | 26.1°C | 76 mm | 64% | 4 m/s | 6.5 |
| 2019 | 33.4°C | 31.0°C | 28.7°C | 37.6°C | 26.1°C | 38 mm | 65% | 4.6 m/s | 6 |
| 2018 | 33.4°C | 30.8°C | 28.2°C | 36.8°C | 26.6°C | 10 mm | 65% | 3.9 m/s | 6.7 |
| 2017 | 32.7°C | 30.1°C | 27.5°C | 36.2°C | 24.5°C | 33 mm | 66% | 4.2 m/s | 6.2 |
| 2016 | 32.1°C | 29.3°C | 26.5°C | 38.6°C | 23.3°C | 2 mm | 64% | 4.8 m/s | 6.7 |
| 2015 | 30.7°C | 28.5°C | 26.4°C | 33.2°C | 24.4°C | 231 mm | 73% | 4.2 m/s | 5.8 |
| 2014 | 32.9°C | 30.7°C | 28.4°C | 36.3°C | 25.3°C | 32 mm | 64% | 3.7 m/s | 6.3 |
| 2013 | 32.2°C | 29.5°C | 26.9°C | 37.4°C | 23.2°C | 5 mm | 63% | 4.9 m/s | 6.8 |
| 2012 | 31.3°C | 29.1°C | 26.9°C | 33.7°C | 25.2°C | 26 mm | 67% | 4.4 m/s | 5.7 |
| 2011 | 31.7°C | 29.2°C | 26.7°C | 33.9°C | 25.0°C | 23 mm | 68% | 3.7 m/s | 6.5 |
| 2010 | 32.5°C | 29.8°C | 27.1°C | 36.3°C | 25.8°C | 5 mm | 64% | 4.3 m/s | 6.6 |
| 2009 | 32.6°C | 29.4°C | 26.3°C | 36.5°C | 24.1°C | 1 mm | 63% | 4.3 m/s | 6.8 |
| 2008 🌧️ | 31.3°C | 29.3°C | 27.3°C | 34.6°C | 24.8°C | 312 mm | 71% | 4.4 m/s | 5.7 |
| 2007 | 31.9°C | 29.4°C | 26.9°C | 35.5°C | 23.5°C | 26 mm | 66% | 4.5 m/s | 6.1 |
| 2006 | 32.5°C | 30.1°C | 27.7°C | 35.9°C | 25.5°C | 167 mm | 69% | 3.8 m/s | 5.8 |
| 2005 | 32.6°C | 30.3°C | 28.0°C | 36.3°C | 24.4°C | 22 mm | 67% | 4.5 m/s | 6.1 |
| 2004 | 32.4°C | 29.4°C | 26.4°C | 35.4°C | 23.7°C | 41 mm | 64% | 4.5 m/s | 6.3 |
| 2003 | 31.9°C | 29.4°C | 26.9°C | 35.3°C | 23.2°C | 7 mm | 65% | 4.3 m/s | 6.7 |
| 2002 | 32.6°C | 30.0°C | 27.4°C | 36.2°C | 25.6°C | 28 mm | 62% | 3.7 m/s | 6 |
| 2001 | 31.8°C | 28.7°C | 25.7°C | 35.8°C | 22.6°C | 7 mm | 63% | 4.3 m/s | 7.1 |
| 2000 | 30.2°C | 28.6°C | 27.0°C | 35.3°C | 24.1°C | 295 mm | 79% | 5 m/s | 5.3 |
| 1999 | 32.1°C | 29.9°C | 27.7°C | 36.2°C | 24.6°C | 221 mm | 72% | 4.1 m/s | 5.8 |
| 1998 | 33.1°C | 30.5°C | 28.0°C | 37.7°C | 24.1°C | 12 mm | 63% | 4.1 m/s | 6.3 |
| 1997 | 32.1°C | 29.0°C | 25.9°C | 35.0°C | 23.2°C | 1 mm | 63% | 4.5 m/s | 6.7 |
| 1996 | 32.7°C | 29.9°C | 27.0°C | 35.3°C | 24.2°C | 2 mm | 62% | 4.8 m/s | 6.6 |
| 1995 | 31.7°C | 28.6°C | 25.6°C | 34.2°C | 22.6°C | 3 mm | 69% | 3.6 m/s | 6.7 |
| 1994 | 32.3°C | 29.3°C | 26.3°C | 35.1°C | 24.5°C | 3 mm | 67% | 4 m/s | 6.5 |
| 1993 ❄️ | 31.6°C | 28.0°C | 24.4°C | 34.2°C | 21.7°C | 0 mm | 60% | 4.6 m/s | 6.7 |
| 1992 | 31.1°C | 28.5°C | 25.8°C | 34.0°C | 23.5°C | 39 mm | 66% | 4.5 m/s | 6.4 |
| 1991 | 33.0°C | 30.0°C | 26.9°C | 36.7°C | 24.0°C | 6 mm | 60% | 4.1 m/s | 6.2 |
| 1990 | 32.2°C | 29.5°C | 26.8°C | 35.4°C | 23.1°C | 59 mm | 69% | 4.9 m/s | 6.3 |
| 1989 | 32.6°C | 30.1°C | 27.6°C | 35.7°C | 25.8°C | 19 mm | 61% | 4.3 m/s | 6.5 |
| 1988 | 33.9°C | 31.1°C | 28.2°C | 39.5°C | 25.1°C | 22 mm | 61% | 4.2 m/s | 6 |
| 1987 | 32.5°C | 29.8°C | 27.1°C | 36.0°C | 25.0°C | 7 mm | 63% | 4.2 m/s | 6.6 |
| 1986 | 32.7°C | 29.8°C | 26.9°C | 35.6°C | 24.1°C | 23 mm | 68% | 4.4 m/s | 6.2 |
| 1985 | 32.8°C | 30.0°C | 27.2°C | 38.6°C | 23.3°C | 3 mm | 63% | 4.3 m/s | 6.8 |
| 1984 | 31.8°C | 29.1°C | 26.3°C | 35.4°C | 23.7°C | 79 mm | 65% | 4.7 m/s | 6.3 |
| 1983 | 31.4°C | 28.8°C | 26.3°C | 34.9°C | 24.0°C | 29 mm | 69% | 4.4 m/s | — |
| 1982 | 32.0°C | 29.4°C | 26.9°C | 33.7°C | 24.0°C | 7 mm | 63% | 4.6 m/s | — |
| 1981 | 31.4°C | 28.7°C | 25.9°C | 34.3°C | 23.3°C | 70 mm | 66% | 4 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 32.3°C with lows near 27°C (mean 29.7°C), based on 45 years of NASA POWER data.
March averages 47 mm of rainfall in Onslow, a relatively wet time of year. The wettest on record was 312 mm in 2008.
The hottest March reached 39.5°C in 1988. The coldest dipped to 21.7°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1°C. Daytime highs moved from 31.9°C to 32.7°C and overnight lows from 26.5°C to 27.8°C over the same span.
March is one of the warmer months of the year in Onslow and a relatively wet time of year, so plan for around 32.3°C daytime highs and 27°C at night.
Not quite — March is the 12th coolest month in Onslow, averaging 29.7°C.
For March in Onslow, pack light, breathable clothing and sun protection, with typical highs of 32.3°C and lows of 27°C.
Relative humidity in March averages 65% — moderately humid.
Average wind speed in March is 4.3 m/s. The windiest March on record averaged 5 m/s (2000).
The wettest March on record was 2008 with 312 mm. On average, March sees 47 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 Onslow 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.
