April is one of the warmer months of the year in Port Lincoln, with average highs near 21.3°C and lows around 14.5°C (mean 17.9°C). It is about average for rainfall, averaging 27 mm of rainfall and 67% relative humidity across the period.
April is one of the warmer months of the year in Port Lincoln. Across 45 years of records, the warmest April in Port Lincoln was 2018 — when the month averaged 20.2°C — while the coldest was 1983 at 15.8°C. Typical April days reach 21.3°C with nights near 14.5°C. The long-term trend is warming, about 0.3°C per decade.
April is about average for rainfall in Port Lincoln, averaging 27 mm of rainfall. The wettest April on record was 1983 with 135 mm, while the driest was 1993 at 3 mm.
Relative humidity in Port Lincoln during April averages 67%. The most humid Aprils were 1983 and 2020 at 72%, and the least humid was 2019 at 58%.
April receives about 3.8 kWh/m²/day of solar energy in Port Lincoln. The sunniest April was 2018 at 4.3 kWh/m²/day, and the cloudiest was 2015 at 3.3.
Average wind speed in Port Lincoln during April is 4.5 m/s. The windiest April was 1986 at 5.6 m/s, while the calmest were 1992 and 1993 at 3.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.5°C | 17.4°C | 18.2°C | 18.4°C | 18.2°C | +0.7°C |
| Avg High | 21.1°C | 20.8°C | 21.7°C | 21.8°C | 21.5°C | +0.4°C |
| Avg Low | 14.0°C | 14.1°C | 14.6°C | 15.0°C | 14.9°C | +0.9°C |
| Avg Rain | 36 mm | 23 mm | 25 mm | 25 mm | 23 mm | -13 mm |
April temperatures in Port Lincoln have risen by about 0.9°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 8.9°C (1983) to a record high of 34.8°C (2005).
Rainfall in April is about average for rainfall, averaging 27 mm, with a wettest year of 135 mm.
A good time to visit Port Lincoln
April is a good time to visit Port Lincoln, with days averaging 21.3°C and nights around 14.5°C (mean 17.9°C, warmer than Port Lincoln's yearly average) and low 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 | 23.2°C | 19.8°C | 16.4°C | 31.9°C | 12.7°C | 9 mm | 64% | 4.1 m/s | 4 |
| 2024 | 19.1°C | 16.2°C | 13.2°C | 24.3°C | 11.3°C | 11 mm | 70% | 4 m/s | 3.8 |
| 2023 | 21.6°C | 18.2°C | 14.9°C | 28.6°C | 12.9°C | 32 mm | 67% | 5 m/s | 3.7 |
| 2022 | 22.2°C | 18.9°C | 15.6°C | 28.5°C | 13.3°C | 28 mm | 69% | 4.6 m/s | 3.7 |
| 2021 | 22.6°C | 18.9°C | 15.1°C | 31.5°C | 12.0°C | 5 mm | 61% | 4 m/s | 4.2 |
| 2020 | 20.0°C | 17.0°C | 14.0°C | 27.2°C | 11.7°C | 53 mm | 72% | 4.6 m/s | 3.7 |
| 2019 | 22.9°C | 19.0°C | 15.2°C | 31.7°C | 12.3°C | 11 mm | 58% | 4.7 m/s | 4 |
| 2018 🔥 | 24.0°C | 20.2°C | 16.4°C | 31.6°C | 13.6°C | 8 mm | 65% | 4.5 m/s | 4.3 |
| 2017 | 21.7°C | 18.5°C | 15.2°C | 27.9°C | 12.4°C | 8 mm | 67% | 4.1 m/s | 3.9 |
| 2016 | 21.4°C | 18.0°C | 14.7°C | 27.1°C | 12.1°C | 17 mm | 68% | 4 m/s | 3.8 |
| 2015 | 18.9°C | 16.4°C | 13.8°C | 24.5°C | 11.3°C | 50 mm | 69% | 4.8 m/s | 3.3 |
| 2014 | 21.2°C | 18.1°C | 14.9°C | 31.9°C | 12.3°C | 27 mm | 70% | 4.5 m/s | 3.5 |
| 2013 | 22.3°C | 18.9°C | 15.4°C | 28.1°C | 13.1°C | 29 mm | 67% | 4.3 m/s | 3.9 |
| 2012 | 22.5°C | 18.8°C | 15.1°C | 30.6°C | 12.3°C | 32 mm | 63% | 4.2 m/s | 4 |
| 2011 | 21.1°C | 17.5°C | 13.8°C | 28.8°C | 12.4°C | 35 mm | 70% | 4.4 m/s | 3.9 |
| 2010 | 21.7°C | 18.4°C | 15.1°C | 28.6°C | 11.6°C | 32 mm | 71% | 4.3 m/s | 3.7 |
| 2009 | 21.4°C | 18.2°C | 15.1°C | 32.3°C | 12.5°C | 39 mm | 67% | 4.8 m/s | 3.8 |
| 2008 | 21.6°C | 18.0°C | 14.4°C | 28.4°C | 11.0°C | 24 mm | 64% | 4.9 m/s | 3.8 |
| 2007 | 22.7°C | 19.0°C | 15.4°C | 30.8°C | 12.7°C | 47 mm | 68% | 4.6 m/s | 4 |
| 2006 | 19.4°C | 16.6°C | 13.9°C | 26.3°C | 11.8°C | 32 mm | 69% | 5.4 m/s | 3.5 |
| 2005 | 23.5°C | 19.3°C | 15.2°C | 34.8°C | 12.8°C | 9 mm | 61% | 4.6 m/s | 4 |
| 2004 | 21.0°C | 17.9°C | 14.7°C | 28.0°C | 11.3°C | 27 mm | 71% | 4.2 m/s | 3.5 |
| 2003 | 21.6°C | 18.0°C | 14.3°C | 26.5°C | 12.4°C | 15 mm | 69% | 4.7 m/s | 4 |
| 2002 | 22.8°C | 18.9°C | 14.9°C | 29.7°C | 12.8°C | 13 mm | 67% | 4.2 m/s | 3.6 |
| 2001 | 21.3°C | 17.6°C | 13.8°C | 29.1°C | 11.2°C | 7 mm | 63% | 4.4 m/s | 4.1 |
| 2000 | 21.4°C | 18.0°C | 14.5°C | 26.6°C | 11.6°C | 42 mm | 71% | 4.9 m/s | 4 |
| 1999 | 20.2°C | 16.8°C | 13.4°C | 27.1°C | 9.3°C | 5 mm | 68% | 4 m/s | 4.2 |
| 1998 | 19.9°C | 16.9°C | 13.8°C | 30.4°C | 11.5°C | 57 mm | 68% | 4.7 m/s | 3.6 |
| 1997 | 21.9°C | 18.3°C | 14.8°C | 27.8°C | 12.7°C | 4 mm | 67% | 4.1 m/s | 3.9 |
| 1996 | 19.2°C | 16.5°C | 13.9°C | 29.4°C | 11.5°C | 18 mm | 69% | 4.6 m/s | 3.6 |
| 1995 | 19.1°C | 16.0°C | 12.8°C | 26.3°C | 11.4°C | 24 mm | 69% | 4.6 m/s | 3.8 |
| 1994 | 21.7°C | 18.1°C | 14.5°C | 28.1°C | 11.8°C | 5 mm | 63% | 4.1 m/s | 4.1 |
| 1993 | 22.8°C | 18.7°C | 14.6°C | 28.4°C | 12.5°C | 3 mm | 60% | 3.9 m/s | 4.1 |
| 1992 | 20.5°C | 17.3°C | 14.1°C | 30.5°C | 11.2°C | 76 mm | 71% | 3.9 m/s | 3.7 |
| 1991 | 21.3°C | 17.9°C | 14.5°C | 31.8°C | 11.9°C | 23 mm | 66% | 4.3 m/s | 3.9 |
| 1990 | 21.1°C | 17.9°C | 14.7°C | 28.9°C | 11.8°C | 17 mm | 66% | 5.3 m/s | 4.1 |
| 1989 | 20.8°C | 17.5°C | 14.2°C | 29.3°C | 11.3°C | 30 mm | 70% | 4.6 m/s | 3.7 |
| 1988 | 21.3°C | 17.8°C | 14.4°C | 26.7°C | 12.0°C | 5 mm | 69% | 4.7 m/s | 3.9 |
| 1987 | 21.6°C | 17.8°C | 14.0°C | 30.2°C | 11.0°C | 21 mm | 64% | 4.3 m/s | 3.8 |
| 1986 | 20.3°C | 17.3°C | 14.3°C | 32.6°C | 12.3°C | 37 mm | 63% | 5.6 m/s | 3.7 |
| 1985 | 21.5°C | 17.8°C | 14.1°C | 30.4°C | 11.5°C | 37 mm | 63% | 4.5 m/s | 4 |
| 1984 | 20.8°C | 17.2°C | 13.5°C | 27.9°C | 11.5°C | 22 mm | 69% | 4.4 m/s | 3.8 |
| 1983 ❄️ 🌧️ | 18.9°C | 15.8°C | 12.7°C | 24.4°C | 8.9°C | 135 mm | 72% | 5 m/s | — |
| 1982 | 21.1°C | 17.6°C | 14.0°C | 28.8°C | 11.9°C | 32 mm | 66% | 4.3 m/s | — |
| 1981 | 23.2°C | 18.9°C | 14.6°C | 31.7°C | 10.2°C | 6 mm | 66% | 4 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 21.3°C with lows near 14.5°C (mean 17.9°C), based on 45 years of NASA POWER data.
April averages 27 mm of rainfall in Port Lincoln, about average for rainfall. The wettest on record was 135 mm in 1983.
The hottest April reached 34.8°C in 2005. The coldest dipped to 8.9°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.9°C. Daytime highs moved from 21.1°C to 21.7°C and overnight lows from 13.8°C to 15°C over the same span.
April is one of the warmer months of the year in Port Lincoln and about average for rainfall, so plan for around 21.3°C daytime highs and 14.5°C at night.
Not quite — April is the 8th coolest month in Port Lincoln, averaging 17.9°C.
For April in Port Lincoln, pack light layers you can adjust through the day, with typical highs of 21.3°C and lows of 14.5°C.
Relative humidity in April averages 67% — moderately humid.
Average wind speed in April is 4.5 m/s. The windiest April on record averaged 5.6 m/s (1986).
The wettest April on record was 1983 with 135 mm. On average, April sees 27 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 Port Lincoln 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.
