March is one of the warmer months of the year in Merredin, with average highs near 30.9°C and lows around 15.9°C (mean 23.4°C). It is about average for rainfall, averaging 22 mm of rainfall and 45% relative humidity across the period.
March is one of the warmer months of the year in Merredin. Across 45 years of records, the warmest March in Merredin was 2025 — when the month averaged 25.8°C — while the coldest was 1984 at 20.9°C. Typical March days reach 30.9°C with nights near 15.9°C. The long-term trend is warming, about 0.2°C per decade.
March is about average for rainfall in Merredin, averaging 22 mm of rainfall. The wettest March on record was 1999 with 91 mm, while the driest was 2001 at 0 mm.
Relative humidity in Merredin during March averages 45%. The most humid March was 2000 at 61%, and the least humid was 1994 at 36%.
March receives about 6.1 kWh/m²/day of solar energy in Merredin. The sunniest Marchs were 1989 and 2007 at 6.7 kWh/m²/day, and the cloudiest were 1988 and 2005 at 5.4.
Average wind speed in Merredin during March is 3.9 m/s. The windiest March was 1997 at 4.6 m/s, while the calmest were 1981, 1994 and 2013 at 3.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.1°C | 23.4°C | 23.2°C | 23.6°C | 24.0°C | +0.9°C |
| Avg High | 30.8°C | 31.0°C | 30.9°C | 30.9°C | 31.4°C | +0.6°C |
| Avg Low | 15.4°C | 15.9°C | 15.6°C | 16.3°C | 16.6°C | +1.2°C |
| Avg Rain | 15 mm | 28 mm | 17 mm | 26 mm | 25 mm | +10 mm |
March temperatures in Merredin have risen by about 1.5°C between 1981–1985 and 2021–2025.
March has ranged from a record low of 5.9°C (2001) to a record high of 42.2°C (1998).
Rainfall in March is about average for rainfall, averaging 22 mm, with a wettest year of 91 mm.
One of the best times to visit Merredin
March is one of the best times to visit Merredin. Expect days averaging 30.9°C and nights around 15.9°C (mean 23.4°C) — warmer than Merredin's yearly average — with low rainfall (22 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 🔥 | 33.7°C | 25.8°C | 18.0°C | 41.2°C | 12.3°C | 20 mm | 41% | 3.9 m/s | 6.2 |
| 2024 | 31.0°C | 23.5°C | 16.1°C | 36.9°C | 10.8°C | 26 mm | 48% | 4.3 m/s | 6 |
| 2023 | 31.6°C | 24.1°C | 16.5°C | 38.9°C | 11.4°C | 27 mm | 43% | 3.7 m/s | 6.1 |
| 2022 | 31.2°C | 24.0°C | 16.8°C | 38.3°C | 10.3°C | 14 mm | 47% | 4.3 m/s | 6 |
| 2021 | 31.3°C | 24.0°C | 16.8°C | 40.0°C | 10.4°C | 34 mm | 45% | 3.6 m/s | 5.9 |
| 2020 | 29.5°C | 22.6°C | 15.6°C | 36.3°C | 10.0°C | 25 mm | 51% | 3.6 m/s | 6 |
| 2019 | 32.2°C | 24.9°C | 17.7°C | 38.0°C | 9.4°C | 13 mm | 43% | 3.7 m/s | 5.8 |
| 2018 | 32.4°C | 24.7°C | 17.0°C | 38.4°C | 10.4°C | 8 mm | 43% | 4.2 m/s | 6.2 |
| 2017 | 30.3°C | 22.6°C | 15.0°C | 39.1°C | 7.6°C | 19 mm | 51% | 3.7 m/s | 6 |
| 2016 | 30.6°C | 23.8°C | 17.0°C | 38.3°C | 11.1°C | 69 mm | 53% | 4 m/s | 5.7 |
| 2015 | 29.8°C | 22.4°C | 15.1°C | 38.1°C | 9.1°C | 61 mm | 53% | 3.8 m/s | 5.9 |
| 2014 | 31.6°C | 24.3°C | 17.0°C | 39.2°C | 11.3°C | 9 mm | 42% | 3.7 m/s | 6.1 |
| 2013 | 28.6°C | 21.5°C | 14.4°C | 35.5°C | 6.9°C | 44 mm | 54% | 3.5 m/s | 5.8 |
| 2012 | 30.4°C | 22.7°C | 15.0°C | 40.0°C | 10.4°C | 12 mm | 43% | 3.9 m/s | 6.5 |
| 2011 | 31.6°C | 24.3°C | 17.1°C | 36.0°C | 13.4°C | 3 mm | 45% | 3.8 m/s | 6.6 |
| 2010 | 31.6°C | 24.4°C | 17.3°C | 39.4°C | 11.5°C | 25 mm | 46% | 3.9 m/s | 6.2 |
| 2009 | 30.1°C | 22.3°C | 14.5°C | 38.8°C | 8.4°C | 15 mm | 46% | 3.8 m/s | 6.5 |
| 2008 | 32.4°C | 24.5°C | 16.6°C | 40.7°C | 10.9°C | 19 mm | 43% | 4.1 m/s | 6.2 |
| 2007 | 31.0°C | 23.2°C | 15.3°C | 39.8°C | 6.4°C | 1 mm | 39% | 4.2 m/s | 6.7 |
| 2006 | 30.4°C | 22.6°C | 14.7°C | 38.7°C | 9.9°C | 20 mm | 48% | 3.9 m/s | 6.3 |
| 2005 | 32.4°C | 25.4°C | 18.5°C | 39.1°C | 14.2°C | 46 mm | 44% | 3.6 m/s | 5.4 |
| 2004 | 30.1°C | 22.2°C | 14.2°C | 38.4°C | 7.7°C | 9 mm | 44% | 3.8 m/s | 6.5 |
| 2003 | 32.1°C | 24.6°C | 17.2°C | 40.8°C | 10.2°C | 24 mm | 44% | 3.8 m/s | 6.2 |
| 2002 | 32.5°C | 24.3°C | 16.0°C | 40.2°C | 11.0°C | 2 mm | 39% | 3.8 m/s | 6.4 |
| 2001 | 29.8°C | 22.0°C | 14.3°C | 36.7°C | 5.9°C | 0 mm | 42% | 3.9 m/s | 6.6 |
| 2000 | 27.8°C | 21.0°C | 14.2°C | 34.6°C | 9.1°C | 33 mm | 61% | 3.9 m/s | 5.9 |
| 1999 🌧️ | 29.7°C | 23.0°C | 16.3°C | 39.3°C | 9.7°C | 91 mm | 54% | 4.1 m/s | 5.7 |
| 1998 | 33.1°C | 25.1°C | 17.1°C | 42.2°C | 10.5°C | 9 mm | 37% | 3.7 m/s | 6.3 |
| 1997 | 29.9°C | 22.4°C | 14.8°C | 36.0°C | 11.6°C | 31 mm | 49% | 4.6 m/s | 6.4 |
| 1996 | 30.6°C | 22.6°C | 14.6°C | 40.5°C | 9.4°C | 4 mm | 43% | 4.3 m/s | 6.3 |
| 1995 | 30.5°C | 23.2°C | 15.8°C | 37.2°C | 8.6°C | 25 mm | 48% | 3.6 m/s | 6.3 |
| 1994 | 33.8°C | 25.2°C | 16.7°C | 39.6°C | 9.8°C | 2 mm | 36% | 3.5 m/s | 6.5 |
| 1993 | 29.3°C | 22.0°C | 14.8°C | 39.5°C | 9.4°C | 11 mm | 47% | 3.8 m/s | 6 |
| 1992 | 30.2°C | 23.3°C | 16.3°C | 41.6°C | 10.0°C | 53 mm | 58% | 4.1 m/s | 5.6 |
| 1991 | 31.5°C | 23.7°C | 15.9°C | 40.8°C | 7.3°C | 4 mm | 41% | 4.1 m/s | 6.5 |
| 1990 | 30.9°C | 23.6°C | 16.3°C | 41.1°C | 6.7°C | 46 mm | 51% | 3.8 m/s | 5.6 |
| 1989 | 31.0°C | 23.3°C | 15.6°C | 38.1°C | 11.7°C | 3 mm | 43% | 4.2 m/s | 6.7 |
| 1988 | 31.3°C | 24.1°C | 16.9°C | 39.2°C | 10.8°C | 23 mm | 39% | 4.3 m/s | 5.4 |
| 1987 | 31.0°C | 23.5°C | 16.0°C | 36.9°C | 9.5°C | 4 mm | 38% | 3.6 m/s | 5.8 |
| 1986 | 30.9°C | 22.8°C | 14.7°C | 39.8°C | 7.6°C | 9 mm | 42% | 4 m/s | 6.3 |
| 1985 | 32.5°C | 24.8°C | 17.1°C | 38.9°C | 11.2°C | 26 mm | 42% | 4 m/s | 6.5 |
| 1984 ❄️ | 28.4°C | 20.9°C | 13.5°C | 35.9°C | 7.3°C | 43 mm | 50% | 3.6 m/s | 5.7 |
| 1983 | 31.4°C | 23.8°C | 16.1°C | 35.8°C | 11.7°C | 14 mm | 41% | 3.8 m/s | — |
| 1982 | 29.7°C | 21.6°C | 13.6°C | 36.6°C | 7.8°C | 7 mm | 40% | 4.2 m/s | — |
| 1981 | 30.9°C | 22.8°C | 14.7°C | 37.0°C | 7.9°C | 4 mm | 38% | 3.5 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 30.9°C with lows near 15.9°C (mean 23.4°C), based on 45 years of NASA POWER data.
March averages 22 mm of rainfall in Merredin, about average for rainfall. The wettest on record was 91 mm in 1999.
The hottest March reached 42.2°C in 1998. The coldest dipped to 5.9°C in 2001.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.5°C. Daytime highs moved from 30.6°C to 31.8°C and overnight lows from 15°C to 16.8°C over the same span.
March is one of the warmer months of the year in Merredin and about average for rainfall, so plan for around 30.9°C daytime highs and 15.9°C at night.
Not quite — March is the 9th coolest month in Merredin, averaging 23.4°C.
For March in Merredin, pack light, breathable clothing and sun protection, with typical highs of 30.9°C and lows of 15.9°C.
Relative humidity in March averages 45% — relatively dry.
Average wind speed in March is 3.9 m/s. The windiest March on record averaged 4.6 m/s (1997).
The wettest March on record was 1999 with 91 mm. On average, March sees 22 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 Merredin 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.
