April is one of the warmer months of the year in Sydney, with average highs near 21.9°C and lows around 17.4°C (mean 19.7°C). It is a relatively wet time of year, averaging 92 mm of rainfall and 73% relative humidity across the period.
April is one of the warmer months of the year in Sydney. Across 45 years of records, the warmest April in Sydney was 2018 — when the month averaged 21.8°C — while the coldest was 1995 at 17.9°C. Typical April days reach 21.9°C with nights near 17.4°C. The long-term trend is warming, about 0.3°C per decade.
April is a relatively wet time of year in Sydney, averaging 92 mm of rainfall. The wettest April on record was 1988 with 458 mm, while the driest was 1997 at 6 mm.
Relative humidity in Sydney during April averages 73%. The most humid April was 1990 at 82%, and the least humid was 2006 at 62%.
April receives about 3.8 kWh/m²/day of solar energy in Sydney. The sunniest April was 2006 at 4.4 kWh/m²/day, and the cloudiest was 1988 at 2.8.
Average wind speed in Sydney during April is 3.1 m/s. The windiest Aprils were 1999 and 2015 at 3.7 m/s, while the calmest were 2019 and 2021 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.3°C | 19.2°C | 19.9°C | 20.2°C | 19.9°C | +0.6°C |
| Avg High | 21.4°C | 21.6°C | 22.1°C | 22.4°C | 22.1°C | +0.7°C |
| Avg Low | 17.2°C | 16.9°C | 17.7°C | 17.9°C | 17.7°C | +0.5°C |
| Avg Rain | 156 mm | 81 mm | 70 mm | 75 mm | 80 mm | -76 mm |
April temperatures in Sydney have risen by about 1.1°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 9.4°C (1995) to a record high of 31.9°C (1986).
Rainfall in April is a relatively wet time of year, averaging 92 mm, with a wettest year of 458 mm.
A good time to visit Sydney
April is a good time to visit Sydney, with days averaging 21.9°C and nights around 17.4°C (mean 19.7°C, warmer than Sydney's yearly average) and higher rainfall. December and March 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 | 23.6°C | 21.4°C | 19.1°C | 27.0°C | 17.3°C | 47 mm | 71% | 3.3 m/s | 3.9 |
| 2024 | 21.8°C | 19.8°C | 17.7°C | 26.2°C | 14.4°C | 179 mm | 77% | 3.2 m/s | 3.7 |
| 2023 | 22.2°C | 20.0°C | 17.9°C | 25.6°C | 14.3°C | 70 mm | 71% | 3.2 m/s | 3.6 |
| 2022 | 21.6°C | 19.9°C | 18.1°C | 24.2°C | 15.4°C | 105 mm | 80% | 3.2 m/s | 3.5 |
| 2021 | 21.1°C | 18.7°C | 16.3°C | 25.0°C | 12.9°C | 17 mm | 73% | 2.5 m/s | 4.3 |
| 2020 | 22.0°C | 19.4°C | 16.9°C | 24.5°C | 13.5°C | 62 mm | 75% | 3 m/s | 3.7 |
| 2019 | 23.2°C | 20.6°C | 18.0°C | 28.1°C | 14.5°C | 15 mm | 74% | 2.5 m/s | 4.1 |
| 2018 🔥 | 24.3°C | 21.8°C | 19.2°C | 29.6°C | 16.6°C | 15 mm | 70% | 2.9 m/s | 4.2 |
| 2017 | 21.6°C | 19.6°C | 17.5°C | 24.7°C | 13.1°C | 32 mm | 72% | 3 m/s | 4.1 |
| 2016 | 23.6°C | 21.2°C | 18.8°C | 29.9°C | 16.8°C | 19 mm | 73% | 2.8 m/s | 3.8 |
| 2015 | 21.1°C | 19.0°C | 16.8°C | 28.8°C | 14.3°C | 263 mm | 79% | 3.7 m/s | 3.3 |
| 2014 | 22.1°C | 20.1°C | 18.1°C | 25.8°C | 14.4°C | 65 mm | 76% | 3.2 m/s | 3.4 |
| 2013 | 22.0°C | 19.5°C | 17.0°C | 26.4°C | 13.8°C | 98 mm | 72% | 2.7 m/s | 4 |
| 2012 | 21.6°C | 19.6°C | 17.5°C | 24.9°C | 12.6°C | 125 mm | 77% | 3.1 m/s | 3.6 |
| 2011 | 21.6°C | 19.6°C | 17.6°C | 26.0°C | 14.2°C | 91 mm | 70% | 3.3 m/s | 3.6 |
| 2010 | 22.9°C | 20.5°C | 18.1°C | 27.2°C | 14.4°C | 26 mm | 71% | 2.8 m/s | 3.9 |
| 2009 | 21.2°C | 19.3°C | 17.5°C | 25.4°C | 12.8°C | 85 mm | 74% | 3.4 m/s | 3.5 |
| 2008 | 20.2°C | 18.3°C | 16.3°C | 25.4°C | 11.2°C | 93 mm | 72% | 3.3 m/s | 3.6 |
| 2007 | 21.9°C | 19.8°C | 17.8°C | 25.2°C | 14.8°C | 103 mm | 75% | 3 m/s | 3.7 |
| 2006 | 22.7°C | 19.7°C | 16.8°C | 29.4°C | 13.0°C | 16 mm | 62% | 3.3 m/s | 4.4 |
| 2005 | 23.9°C | 21.3°C | 18.8°C | 28.5°C | 17.0°C | 25 mm | 74% | 2.8 m/s | 4.2 |
| 2004 | 22.6°C | 20.3°C | 18.1°C | 28.6°C | 14.5°C | 84 mm | 74% | 2.8 m/s | 4 |
| 2003 | 21.4°C | 19.6°C | 17.9°C | 25.1°C | 16.1°C | 117 mm | 76% | 3.5 m/s | 3.4 |
| 2002 | 22.2°C | 20.2°C | 18.1°C | 24.5°C | 16.5°C | 42 mm | 77% | 2.8 m/s | 3.9 |
| 2001 | 22.8°C | 20.3°C | 17.7°C | 27.1°C | 14.3°C | 88 mm | 73% | 3 m/s | 3.8 |
| 2000 | 21.9°C | 19.9°C | 17.9°C | 26.1°C | 14.3°C | 50 mm | 75% | 3 m/s | 3.5 |
| 1999 | 20.6°C | 18.8°C | 16.9°C | 24.2°C | 13.0°C | 129 mm | 75% | 3.7 m/s | 3.4 |
| 1998 | 22.7°C | 20.5°C | 18.2°C | 29.0°C | 14.4°C | 123 mm | 72% | 3.1 m/s | 3.6 |
| 1997 | 23.1°C | 20.2°C | 17.3°C | 27.4°C | 14.5°C | 6 mm | 68% | 2.9 m/s | 4.1 |
| 1996 | 21.9°C | 18.8°C | 15.8°C | 28.3°C | 11.7°C | 47 mm | 65% | 3 m/s | 4.1 |
| 1995 ❄️ | 20.4°C | 17.9°C | 15.4°C | 24.0°C | 9.4°C | 17 mm | 68% | 3.2 m/s | 4 |
| 1994 | 21.5°C | 19.1°C | 16.7°C | 25.2°C | 11.6°C | 84 mm | 75% | 3 m/s | 4.2 |
| 1993 | 22.1°C | 19.6°C | 17.2°C | 28.0°C | 15.9°C | 25 mm | 74% | 2.7 m/s | 4 |
| 1992 | 20.6°C | 18.7°C | 16.9°C | 23.2°C | 12.6°C | 78 mm | 77% | 3.1 m/s | 3.6 |
| 1991 | 21.4°C | 18.9°C | 16.3°C | 26.6°C | 13.1°C | 28 mm | 67% | 2.9 m/s | 4.2 |
| 1990 | 21.5°C | 19.9°C | 18.3°C | 24.7°C | 13.9°C | 276 mm | 82% | 3.5 m/s | 3 |
| 1989 | 21.4°C | 20.0°C | 18.7°C | 23.5°C | 15.3°C | 293 mm | 82% | 3.5 m/s | 3.2 |
| 1988 🌧️ | 20.9°C | 19.5°C | 18.2°C | 23.2°C | 15.1°C | 458 mm | 81% | 3.3 m/s | 2.8 |
| 1987 | 21.8°C | 19.3°C | 16.9°C | 26.6°C | 14.4°C | 36 mm | 73% | 2.7 m/s | 3.9 |
| 1986 | 23.5°C | 20.2°C | 16.9°C | 31.9°C | 13.1°C | 61 mm | 65% | 2.9 m/s | 4.1 |
| 1985 | 21.0°C | 19.2°C | 17.4°C | 25.3°C | 13.0°C | 204 mm | 75% | 3.1 m/s | 3.8 |
| 1984 | 20.6°C | 18.5°C | 16.3°C | 24.1°C | 13.0°C | 106 mm | 78% | 2.7 m/s | 3.8 |
| 1983 | 19.9°C | 18.0°C | 16.2°C | 23.4°C | 12.6°C | 88 mm | 76% | 3.5 m/s | — |
| 1982 | 22.0°C | 19.4°C | 16.8°C | 25.6°C | 12.0°C | 14 mm | 69% | 2.7 m/s | — |
| 1981 | 21.8°C | 19.5°C | 17.2°C | 25.3°C | 13.9°C | 143 mm | 73% | 2.9 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 21.9°C with lows near 17.4°C (mean 19.7°C), based on 45 years of NASA POWER data.
April averages 92 mm of rainfall in Sydney, a relatively wet time of year. The wettest on record was 458 mm in 1988.
The hottest April reached 31.9°C in 1986. The coldest dipped to 9.4°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.1°C. Daytime highs moved from 21.1°C to 22.1°C and overnight lows from 16.8°C to 17.8°C over the same span.
April is one of the warmer months of the year in Sydney and a relatively wet time of year, so plan for around 21.9°C daytime highs and 17.4°C at night.
Not quite — April is the 7th coolest month in Sydney, averaging 19.7°C.
For April in Sydney, pack light layers you can adjust through the day, with typical highs of 21.9°C and lows of 17.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 73% — moderately humid.
Average wind speed in April is 3.1 m/s. The windiest April on record averaged 3.7 m/s (1999).
The wettest April on record was 1988 with 458 mm. On average, April sees 92 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 Sydney 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.
