April is one of the warmer months of the year in Mount Barker, with average highs near 22.9°C and lows around 11.2°C (mean 17°C). It is about average for rainfall, averaging 43 mm of rainfall and 71% relative humidity across the period.
April is one of the warmer months of the year in Mount Barker. Across 45 years of records, the warmest April in Mount Barker was 1999 — when the month averaged 19.2°C — while the coldest was 2006 at 14.5°C. Typical April days reach 22.9°C with nights near 11.2°C. The long-term April temperature trend is broadly flat.
April is about average for rainfall in Mount Barker, averaging 43 mm of rainfall. The wettest April on record was 2005 with 130 mm, while the driest was 2024 at 6 mm.
Relative humidity in Mount Barker during April averages 71%. The most humid April was 2005 at 81%, and the least humid was 2024 at 64%.
April receives about 3.8 kWh/m²/day of solar energy in Mount Barker. The sunniest April was 2024 at 4.3 kWh/m²/day, and the cloudiest was 2016 at 3.2.
Average wind speed in Mount Barker during April is 3.1 m/s. The windiest Aprils were 1985, 1989 and 2023 at 3.5 m/s, while the calmest was 2017 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.9°C | 17.3°C | 16.6°C | 17.2°C | 17.2°C | +0.3°C |
| Avg High | 23.1°C | 23.3°C | 22.3°C | 23.1°C | 22.9°C | -0.2°C |
| Avg Low | 10.7°C | 11.4°C | 10.9°C | 11.4°C | 11.6°C | +0.9°C |
| Avg Rain | 35 mm | 30 mm | 57 mm | 45 mm | 50 mm | +15 mm |
April temperatures in Mount Barker have risen by about 0.4°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 4.6°C (1984) to a record high of 34.4°C (2001).
Rainfall in April is about average for rainfall, averaging 43 mm, with a wettest year of 130 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Mount Barker
April is a good time to visit Mount Barker, with days averaging 22.9°C and nights around 11.2°C (mean 17°C, warmer than Mount Barker's yearly average) and moderate rainfall. February and January are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 22.8°C | 17.4°C | 12.1°C | 30.5°C | 6.6°C | 47 mm | 72% | 2.9 m/s | 3.5 |
| 2024 | 24.4°C | 18.0°C | 11.6°C | 30.8°C | 8.8°C | 6 mm | 64% | 3.4 m/s | 4.3 |
| 2023 | 21.0°C | 15.8°C | 10.6°C | 28.8°C | 6.5°C | 77 mm | 73% | 3.5 m/s | 3.7 |
| 2022 | 22.1°C | 16.7°C | 11.3°C | 32.0°C | 8.1°C | 52 mm | 72% | 3 m/s | 3.6 |
| 2021 | 23.6°C | 18.0°C | 12.4°C | 32.5°C | 8.6°C | 76 mm | 73% | 2.7 m/s | 3.5 |
| 2020 | 23.2°C | 17.5°C | 11.8°C | 33.3°C | 7.5°C | 41 mm | 71% | 3.3 m/s | 3.8 |
| 2019 | 23.1°C | 16.8°C | 10.5°C | 32.1°C | 5.8°C | 37 mm | 67% | 3.4 m/s | 4 |
| 2018 | 23.3°C | 17.3°C | 11.3°C | 33.0°C | 7.3°C | 25 mm | 70% | 3.1 m/s | 3.8 |
| 2017 | 22.8°C | 16.5°C | 10.2°C | 28.2°C | 6.3°C | 17 mm | 76% | 2.5 m/s | 3.9 |
| 2016 | 21.2°C | 16.4°C | 11.6°C | 27.7°C | 7.9°C | 78 mm | 78% | 3.1 m/s | 3.2 |
| 2015 | 21.5°C | 16.0°C | 10.5°C | 26.9°C | 6.7°C | 101 mm | 74% | 3.1 m/s | 3.6 |
| 2014 | 23.9°C | 17.8°C | 11.8°C | 32.6°C | 6.9°C | 26 mm | 69% | 2.7 m/s | 3.9 |
| 2013 | 24.5°C | 18.8°C | 13.1°C | 33.9°C | 8.4°C | 33 mm | 75% | 2.6 m/s | 3.4 |
| 2012 | 23.8°C | 18.1°C | 12.3°C | 32.8°C | 7.2°C | 33 mm | 65% | 3.2 m/s | 3.8 |
| 2011 | 23.8°C | 17.6°C | 11.4°C | 33.0°C | 7.1°C | 57 mm | 68% | 3.3 m/s | 4.2 |
| 2010 | 23.0°C | 17.0°C | 11.0°C | 30.1°C | 6.5°C | 40 mm | 74% | 2.8 m/s | 3.7 |
| 2009 | 23.1°C | 17.0°C | 10.9°C | 28.5°C | 6.8°C | 18 mm | 73% | 2.9 m/s | 4.2 |
| 2008 | 21.1°C | 15.9°C | 10.6°C | 29.2°C | 7.1°C | 91 mm | 72% | 3.1 m/s | 3.8 |
| 2007 | 22.3°C | 16.5°C | 10.7°C | 30.7°C | 4.7°C | 65 mm | 74% | 3.2 m/s | 3.8 |
| 2006 ❄️ | 19.8°C | 14.5°C | 9.3°C | 27.5°C | 6.2°C | 55 mm | 77% | 2.9 m/s | 3.4 |
| 2005 🌧️ | 19.8°C | 14.7°C | 9.6°C | 25.9°C | 6.1°C | 130 mm | 81% | 2.8 m/s | 3.8 |
| 2004 | 24.2°C | 17.8°C | 11.4°C | 30.9°C | 7.0°C | 21 mm | 68% | 2.9 m/s | 3.8 |
| 2003 | 23.0°C | 17.7°C | 12.4°C | 30.3°C | 7.2°C | 55 mm | 74% | 3 m/s | 3.5 |
| 2002 | 22.6°C | 16.9°C | 11.2°C | 33.4°C | 6.6°C | 88 mm | 72% | 3 m/s | 3.6 |
| 2001 | 24.7°C | 18.1°C | 11.5°C | 34.4°C | 5.9°C | 10 mm | 64% | 3.1 m/s | 3.9 |
| 2000 | 22.4°C | 16.7°C | 11.0°C | 27.7°C | 6.5°C | 35 mm | 70% | 3.4 m/s | 4 |
| 1999 🔥 | 25.4°C | 19.2°C | 13.0°C | 31.8°C | 8.0°C | 11 mm | 67% | 3 m/s | 4 |
| 1998 | 21.0°C | 16.0°C | 11.0°C | 32.2°C | 7.3°C | 75 mm | 76% | 3.1 m/s | 3.3 |
| 1997 | 23.8°C | 18.0°C | 12.1°C | 32.0°C | 6.8°C | 24 mm | 73% | 3.1 m/s | 3.7 |
| 1996 | 23.6°C | 17.4°C | 11.2°C | 31.0°C | 7.7°C | 22 mm | 65% | 3.3 m/s | 3.8 |
| 1995 | 22.5°C | 16.5°C | 10.5°C | 32.4°C | 5.9°C | 16 mm | 70% | 3 m/s | 4.1 |
| 1994 | 25.4°C | 18.6°C | 11.7°C | 34.0°C | 6.7°C | 14 mm | 65% | 2.8 m/s | 4.2 |
| 1993 | 22.3°C | 16.1°C | 9.9°C | 32.1°C | 5.9°C | 37 mm | 73% | 3.2 m/s | 3.8 |
| 1992 | 22.5°C | 17.1°C | 11.7°C | 27.5°C | 7.3°C | 26 mm | 73% | 3.1 m/s | 3.6 |
| 1991 | 24.8°C | 18.5°C | 12.1°C | 34.2°C | 7.6°C | 23 mm | 66% | 3 m/s | 3.9 |
| 1990 | 21.5°C | 16.0°C | 10.6°C | 33.0°C | 6.9°C | 48 mm | 72% | 3.4 m/s | 3.5 |
| 1989 | 22.0°C | 16.6°C | 11.1°C | 30.1°C | 6.4°C | 66 mm | 71% | 3.5 m/s | 3.6 |
| 1988 | 24.5°C | 18.2°C | 11.8°C | 31.9°C | 7.7°C | 23 mm | 68% | 3.1 m/s | 3.8 |
| 1987 | 23.0°C | 17.3°C | 11.6°C | 29.3°C | 6.8°C | 52 mm | 69% | 3.1 m/s | 3.6 |
| 1986 | 22.6°C | 16.1°C | 9.5°C | 31.4°C | 6.1°C | 8 mm | 65% | 3.2 m/s | 4.1 |
| 1985 | 21.9°C | 15.8°C | 9.8°C | 28.0°C | 5.0°C | 61 mm | 72% | 3.5 m/s | 4 |
| 1984 | 24.0°C | 17.3°C | 10.6°C | 31.6°C | 4.6°C | 23 mm | 65% | 3.3 m/s | 3.8 |
| 1983 | 23.3°C | 17.2°C | 11.1°C | 30.4°C | 8.0°C | 23 mm | 68% | 3 m/s | — |
| 1982 | 22.2°C | 15.9°C | 9.6°C | 31.1°C | 4.9°C | 13 mm | 69% | 2.9 m/s | — |
| 1981 | 24.0°C | 17.7°C | 11.4°C | 29.0°C | 8.0°C | 48 mm | 73% | 2.8 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 22.9°C with lows near 11.2°C (mean 17°C), based on 45 years of NASA POWER data.
April averages 43 mm of rainfall in Mount Barker, about average for rainfall. The wettest on record was 130 mm in 2005.
The hottest April reached 34.4°C in 2001. The coldest dipped to 4.6°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.4°C — but days and nights have moved in opposite directions. Overnight lows rose from 10.5°C to 11.6°C while daytime highs eased from 23.1°C to 22.8°C, narrowing the gap between day and night.
April is one of the warmer months of the year in Mount Barker and about average for rainfall, so plan for around 22.9°C daytime highs and 11.2°C at night.
Not quite — April is the 8th coolest month in Mount Barker, averaging 17°C.
For April in Mount Barker, pack light layers you can adjust through the day, with typical highs of 22.9°C and lows of 11.2°C.
Relative humidity in April averages 71% — moderately humid.
Average wind speed in April is 3.1 m/s. The windiest April on record averaged 3.5 m/s (1985).
The wettest April on record was 2005 with 130 mm. On average, April sees 43 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 Mount Barker behaves each April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
