April is one of the warmer months of the year in Sunbury, with average highs near 20.2°C and lows around 8.7°C (mean 14.5°C). It is about average for rainfall, averaging 54 mm of rainfall and 73% relative humidity across the period.
April is one of the warmer months of the year in Sunbury. Across 45 years of records, the warmest April in Sunbury was 2025 — when the month averaged 16.9°C — while the coldest was 1995 at 11.1°C. Typical April days reach 20.2°C with nights near 8.7°C. The long-term trend is warming, about 0.2°C per decade.
April is about average for rainfall in Sunbury, averaging 54 mm of rainfall. The wettest April on record was 2020 with 181 mm, while the driest was 2019 at 8 mm.
Relative humidity in Sunbury during April averages 73%. The most humid April was 2020 at 83%, and the least humid was 2005 at 64%.
April receives about 3.5 kWh/m²/day of solar energy in Sunbury. The sunniest Aprils were 1999, 2005 and 2018, among others at 3.9 kWh/m²/day, and the cloudiest were 2014, 2020 and 2022 at 3.1.
Average wind speed in Sunbury during April is 2 m/s. The windiest April was 1986 at 2.5 m/s, while the calmest were 1989 and 2007 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.5°C | 13.6°C | 14.7°C | 14.9°C | 14.4°C | -0.1°C |
| Avg High | 20.3°C | 19.3°C | 20.7°C | 20.6°C | 19.8°C | -0.5°C |
| Avg Low | 8.6°C | 8.0°C | 8.8°C | 9.2°C | 9.0°C | +0.4°C |
| Avg Rain | 52 mm | 55 mm | 51 mm | 44 mm | 74 mm | +22 mm |
April temperatures in Sunbury have risen by about 0.7°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 1.4°C (2009) to a record high of 34.1°C (1986).
Rainfall in April is about average for rainfall, averaging 54 mm, with a wettest year of 181 mm.
A good time to visit Sunbury
April is a good time to visit Sunbury, with days averaging 20.2°C and nights around 8.7°C (mean 14.5°C, close to Sunbury'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 🔥 | 22.7°C | 16.9°C | 11.0°C | 29.7°C | 6.3°C | 20 mm | 70% | 1.9 m/s | 3.7 |
| 2024 | 18.5°C | 13.5°C | 8.4°C | 29.7°C | 6.1°C | 91 mm | 79% | 1.9 m/s | 3.2 |
| 2023 | 19.6°C | 14.3°C | 9.0°C | 26.0°C | 5.1°C | 60 mm | 78% | 2 m/s | 3.3 |
| 2022 | 20.4°C | 15.1°C | 9.9°C | 26.4°C | 4.7°C | 68 mm | 78% | 1.8 m/s | 3.1 |
| 2021 | 20.2°C | 14.3°C | 8.3°C | 30.4°C | 4.7°C | 26 mm | 73% | 2 m/s | 3.6 |
| 2020 🌧️ | 17.1°C | 12.4°C | 7.7°C | 23.1°C | 3.8°C | 181 mm | 83% | 2.1 m/s | 3.1 |
| 2019 | 22.1°C | 15.6°C | 9.2°C | 29.3°C | 4.5°C | 8 mm | 64% | 2 m/s | 3.7 |
| 2018 | 22.9°C | 16.4°C | 10.0°C | 30.5°C | 5.7°C | 16 mm | 69% | 1.9 m/s | 3.9 |
| 2017 | 20.3°C | 14.8°C | 9.3°C | 25.9°C | 5.7°C | 59 mm | 75% | 2 m/s | 3.4 |
| 2016 | 21.8°C | 15.8°C | 9.9°C | 27.2°C | 5.7°C | 36 mm | 69% | 2.1 m/s | 3.5 |
| 2015 | 18.9°C | 13.4°C | 7.9°C | 27.2°C | 4.0°C | 49 mm | 75% | 2.1 m/s | 3.4 |
| 2014 | 19.6°C | 14.6°C | 9.7°C | 30.7°C | 3.8°C | 82 mm | 77% | 2.1 m/s | 3.1 |
| 2013 | 20.4°C | 14.6°C | 8.9°C | 26.5°C | 3.5°C | 18 mm | 73% | 1.9 m/s | 3.4 |
| 2012 | 20.4°C | 14.6°C | 8.8°C | 27.4°C | 4.0°C | 46 mm | 76% | 1.9 m/s | 3.7 |
| 2011 | 19.3°C | 13.7°C | 8.0°C | 24.2°C | 5.1°C | 68 mm | 79% | 1.8 m/s | 3.7 |
| 2010 | 20.7°C | 15.6°C | 10.5°C | 26.5°C | 4.6°C | 57 mm | 77% | 2 m/s | 3.3 |
| 2009 | 20.0°C | 14.0°C | 8.1°C | 30.1°C | 1.4°C | 54 mm | 71% | 2 m/s | 3.6 |
| 2008 | 19.9°C | 13.8°C | 7.7°C | 26.7°C | 2.8°C | 19 mm | 71% | 1.9 m/s | 3.6 |
| 2007 | 21.9°C | 15.6°C | 9.4°C | 27.9°C | 6.4°C | 33 mm | 71% | 1.6 m/s | 3.8 |
| 2006 | 17.9°C | 12.5°C | 7.2°C | 25.7°C | 3.8°C | 65 mm | 72% | 2.4 m/s | 3.3 |
| 2005 | 23.6°C | 16.8°C | 10.0°C | 32.4°C | 6.4°C | 26 mm | 64% | 2.2 m/s | 3.9 |
| 2004 | 21.0°C | 15.0°C | 8.9°C | 30.7°C | 5.9°C | 47 mm | 69% | 2.2 m/s | 3.6 |
| 2003 | 20.3°C | 14.5°C | 8.8°C | 27.0°C | 3.9°C | 74 mm | 75% | 1.9 m/s | 3.5 |
| 2002 | 22.2°C | 16.0°C | 9.8°C | 28.8°C | 4.6°C | 38 mm | 72% | 1.8 m/s | 3.4 |
| 2001 | 19.7°C | 14.2°C | 8.6°C | 27.6°C | 5.4°C | 100 mm | 74% | 2.1 m/s | 3.4 |
| 2000 | 20.7°C | 14.9°C | 9.2°C | 26.4°C | 5.6°C | 54 mm | 72% | 1.9 m/s | 3.7 |
| 1999 | 18.9°C | 13.2°C | 7.5°C | 24.4°C | 2.8°C | 29 mm | 74% | 1.8 m/s | 3.9 |
| 1998 | 19.0°C | 13.2°C | 7.4°C | 29.0°C | 4.1°C | 70 mm | 74% | 1.9 m/s | 3.4 |
| 1997 | 20.6°C | 14.2°C | 7.8°C | 27.8°C | 3.2°C | 17 mm | 67% | 2 m/s | 3.6 |
| 1996 | 16.4°C | 11.9°C | 7.5°C | 24.6°C | 4.8°C | 79 mm | 81% | 2.2 m/s | 3.2 |
| 1995 ❄️ | 16.2°C | 11.1°C | 6.0°C | 23.2°C | 2.1°C | 119 mm | 78% | 2.3 m/s | 3.4 |
| 1994 | 20.1°C | 14.4°C | 8.6°C | 26.8°C | 5.5°C | 38 mm | 72% | 2.1 m/s | 3.5 |
| 1993 | 22.0°C | 15.3°C | 8.6°C | 26.8°C | 6.0°C | 15 mm | 69% | 2 m/s | 3.9 |
| 1992 | 19.8°C | 14.3°C | 8.8°C | 28.8°C | 2.5°C | 61 mm | 73% | 2.1 m/s | 3.5 |
| 1991 | 19.3°C | 13.4°C | 7.5°C | 26.4°C | 3.7°C | 32 mm | 71% | 2 m/s | 3.7 |
| 1990 | 20.3°C | 15.1°C | 9.8°C | 28.8°C | 5.2°C | 90 mm | 77% | 2.4 m/s | 3.4 |
| 1989 | 19.6°C | 14.8°C | 9.9°C | 26.7°C | 5.9°C | 79 mm | 82% | 1.6 m/s | 3.3 |
| 1988 | 22.2°C | 15.9°C | 9.6°C | 26.5°C | 4.9°C | 23 mm | 69% | 2 m/s | 3.6 |
| 1987 | 21.1°C | 14.7°C | 8.2°C | 28.2°C | 3.3°C | 38 mm | 70% | 1.9 m/s | 3.7 |
| 1986 | 19.8°C | 14.1°C | 8.5°C | 34.1°C | 2.7°C | 76 mm | 68% | 2.5 m/s | 3.5 |
| 1985 | 21.1°C | 15.4°C | 9.8°C | 31.7°C | 4.6°C | 65 mm | 74% | 1.9 m/s | 3.8 |
| 1984 | 19.3°C | 13.4°C | 7.4°C | 24.7°C | 4.7°C | 59 mm | 74% | 1.9 m/s | 3.6 |
| 1983 | 17.2°C | 12.1°C | 7.0°C | 22.1°C | 2.6°C | 62 mm | 76% | 2 m/s | — |
| 1982 | 20.4°C | 14.3°C | 8.1°C | 28.3°C | 3.0°C | 51 mm | 70% | 1.9 m/s | — |
| 1981 | 21.7°C | 15.4°C | 9.0°C | 28.6°C | 3.0°C | 17 mm | 69% | 2.1 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 20.2°C with lows near 8.7°C (mean 14.5°C), based on 45 years of NASA POWER data.
April averages 54 mm of rainfall in Sunbury, about average for rainfall. The wettest on record was 181 mm in 2020.
The hottest April reached 34.1°C in 1986. The coldest dipped to 1.4°C in 2009.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.7°C. Daytime highs moved from 19.9°C to 20.3°C and overnight lows from 8.3°C to 9.3°C over the same span.
April is one of the warmer months of the year in Sunbury and about average for rainfall, so plan for around 20.2°C daytime highs and 8.7°C at night.
Not quite — April is the 7th coolest month in Sunbury, averaging 14.5°C.
For April in Sunbury, pack light layers you can adjust through the day, with typical highs of 20.2°C and lows of 8.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 73% — moderately humid.
Average wind speed in April is 2 m/s. The windiest April on record averaged 2.5 m/s (1986).
The wettest April on record was 2020 with 181 mm. On average, April sees 54 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 Sunbury 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.
