April is one of the warmer months of the year in Karratha, with average highs near 31.1°C and lows around 26.7°C (mean 28.9°C). It is about average for rainfall, averaging 20 mm of rainfall and 62% relative humidity across the period.
April is one of the warmer months of the year in Karratha. Across 45 years of records, the warmest April in Karratha was 2018 — when the month averaged 30.8°C — while the coldest was 1999 at 26.6°C. Typical April days reach 31.1°C with nights near 26.7°C. The long-term April temperature trend is broadly flat.
April is about average for rainfall in Karratha, averaging 20 mm of rainfall. The wettest April on record was 2006 with 104 mm, while the driest was 1994 at 0 mm.
Relative humidity in Karratha during April averages 62%. The most humid April was 2000 at 72%, and the least humid was 1994 at 53%.
April receives about 5.5 kWh/m²/day of solar energy in Karratha. The sunniest April was 1994 at 6 kWh/m²/day, and the cloudiest was 2015 at 4.5.
Average wind speed in Karratha during April is 4.1 m/s. The windiest April was 2015 at 5.8 m/s, while the calmest was 1988 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.1°C | 28.8°C | 28.7°C | 28.8°C | 29.3°C | +0.2°C |
| Avg High | 31.2°C | 31.0°C | 30.9°C | 31.0°C | 31.4°C | +0.2°C |
| Avg Low | 26.9°C | 26.5°C | 26.4°C | 26.5°C | 27.3°C | +0.4°C |
| Avg Rain | 20 mm | 32 mm | 23 mm | 13 mm | 10 mm | -10 mm |
April temperatures in Karratha have risen by about 0.3°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 20°C (2015) to a record high of 37.2°C (1985).
Rainfall in April is about average for rainfall, averaging 20 mm, with a wettest year of 104 mm.
A quieter season to visit Karratha
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Karratha. That said, April — with days averaging 31.1°C and nights around 26.7°C (mean 28.9°C) and low rainfall (20 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 32.6°C | 30.7°C | 28.8°C | 35.2°C | 25.8°C | 3 mm | 59% | 3.8 m/s | 5.8 |
| 2024 | 31.0°C | 28.6°C | 26.3°C | 34.5°C | 22.9°C | 16 mm | 59% | 4.8 m/s | 5.6 |
| 2023 | 30.4°C | 28.3°C | 26.2°C | 32.6°C | 23.3°C | 4 mm | 60% | 4.7 m/s | 5.4 |
| 2022 | 31.4°C | 29.3°C | 27.3°C | 33.8°C | 24.8°C | 9 mm | 60% | 4.2 m/s | 5.2 |
| 2021 | 31.0°C | 28.8°C | 26.7°C | 33.5°C | 24.0°C | 22 mm | 60% | 3.8 m/s | 5.7 |
| 2020 | 32.1°C | 30.2°C | 28.2°C | 34.8°C | 27.0°C | 4 mm | 63% | 3.9 m/s | 5.4 |
| 2019 | 30.7°C | 28.4°C | 26.0°C | 32.4°C | 22.7°C | 17 mm | 66% | 4.3 m/s | 5.3 |
| 2018 🔥 | 33.2°C | 30.8°C | 28.4°C | 36.8°C | 27.0°C | 2 mm | 59% | 3.6 m/s | 5.9 |
| 2017 | 30.4°C | 28.1°C | 25.8°C | 32.5°C | 23.8°C | 26 mm | 62% | 4.3 m/s | 5.3 |
| 2016 | 32.5°C | 29.9°C | 27.3°C | 36.0°C | 25.7°C | 4 mm | 61% | 3.8 m/s | 5.8 |
| 2015 | 29.1°C | 27.2°C | 25.3°C | 34.1°C | 20.0°C | 53 mm | 67% | 5.8 m/s | 4.5 |
| 2014 | 30.9°C | 28.8°C | 26.6°C | 32.4°C | 25.6°C | 2 mm | 58% | 4 m/s | 5.7 |
| 2013 | 31.6°C | 29.4°C | 27.2°C | 34.5°C | 25.4°C | 10 mm | 61% | 3.9 m/s | 5.8 |
| 2012 | 30.8°C | 28.4°C | 26.1°C | 33.3°C | 23.8°C | 1 mm | 58% | 4.3 m/s | 5.8 |
| 2011 | 30.2°C | 28.1°C | 26.1°C | 32.4°C | 24.4°C | 16 mm | 65% | 3.7 m/s | 5.4 |
| 2010 | 30.8°C | 28.6°C | 26.5°C | 34.3°C | 24.8°C | 3 mm | 65% | 4.2 m/s | 5.6 |
| 2009 | 30.9°C | 28.6°C | 26.3°C | 33.9°C | 24.0°C | 1 mm | 58% | 4.7 m/s | 5.3 |
| 2008 | 30.9°C | 28.6°C | 26.2°C | 34.2°C | 24.2°C | 8 mm | 66% | 3.4 m/s | 5.2 |
| 2007 | 30.8°C | 28.7°C | 26.7°C | 32.6°C | 24.6°C | 12 mm | 64% | 3.2 m/s | 5.7 |
| 2006 🌧️ | 29.2°C | 27.2°C | 25.2°C | 31.1°C | 21.4°C | 104 mm | 71% | 4.3 m/s | 5.4 |
| 2005 | 32.4°C | 30.1°C | 27.9°C | 36.1°C | 24.6°C | 33 mm | 63% | 3.6 m/s | 5.1 |
| 2004 | 31.3°C | 28.9°C | 26.5°C | 33.4°C | 23.3°C | 5 mm | 62% | 3.9 m/s | 5.8 |
| 2003 | 30.8°C | 28.6°C | 26.3°C | 33.4°C | 23.1°C | 35 mm | 61% | 3.8 m/s | 5.6 |
| 2002 | 32.5°C | 29.7°C | 26.8°C | 35.2°C | 25.5°C | 2 mm | 58% | 3.9 m/s | 5.9 |
| 2001 | 30.8°C | 28.4°C | 26.1°C | 33.0°C | 23.2°C | 3 mm | 63% | 3.5 m/s | 5.8 |
| 2000 | 29.5°C | 27.9°C | 26.2°C | 32.6°C | 20.9°C | 23 mm | 72% | 4.2 m/s | 5.5 |
| 1999 ❄️ | 29.3°C | 26.6°C | 23.9°C | 31.8°C | 20.8°C | 32 mm | 67% | 5.1 m/s | 5.4 |
| 1998 | 31.2°C | 29.2°C | 27.2°C | 33.5°C | 25.6°C | 38 mm | 64% | 3.5 m/s | 4.9 |
| 1997 | 31.0°C | 28.6°C | 26.2°C | 32.3°C | 25.1°C | 16 mm | 59% | 3.7 m/s | 5.4 |
| 1996 | 31.3°C | 29.1°C | 26.8°C | 35.7°C | 24.3°C | 91 mm | 64% | 4.6 m/s | 5.3 |
| 1995 | 30.5°C | 28.4°C | 26.4°C | 32.3°C | 24.3°C | 40 mm | 67% | 3.8 m/s | 5.4 |
| 1994 | 31.7°C | 29.0°C | 26.3°C | 34.6°C | 23.8°C | 0 mm | 53% | 4.1 m/s | 6 |
| 1993 | 31.8°C | 29.4°C | 27.1°C | 33.9°C | 25.7°C | 15 mm | 63% | 3.6 m/s | 5.5 |
| 1992 | 30.7°C | 28.6°C | 26.5°C | 35.5°C | 23.1°C | 80 mm | 67% | 4.3 m/s | 5.1 |
| 1991 | 31.1°C | 29.3°C | 27.4°C | 33.8°C | 25.2°C | 7 mm | 64% | 4.1 m/s | 5.5 |
| 1990 | 31.7°C | 29.3°C | 26.9°C | 33.6°C | 25.2°C | 0 mm | 57% | 4.3 m/s | 5.6 |
| 1989 | 31.1°C | 28.9°C | 26.8°C | 33.7°C | 22.1°C | 59 mm | 61% | 4.6 m/s | 5.4 |
| 1988 | 30.7°C | 29.0°C | 27.2°C | 32.7°C | 25.9°C | 8 mm | 63% | 3.1 m/s | 5.5 |
| 1987 | 31.9°C | 29.9°C | 28.0°C | 37.1°C | 26.6°C | 30 mm | 64% | 3.8 m/s | 5.4 |
| 1986 | 32.8°C | 30.0°C | 27.1°C | 36.3°C | 24.2°C | 3 mm | 54% | 4.5 m/s | 5.7 |
| 1985 | 31.4°C | 29.4°C | 27.4°C | 37.2°C | 24.1°C | 45 mm | 66% | 4.4 m/s | 5 |
| 1984 | 30.5°C | 28.3°C | 26.2°C | 33.3°C | 23.5°C | 17 mm | 65% | 3.8 m/s | 5.6 |
| 1983 | 28.7°C | 27.1°C | 25.4°C | 32.5°C | 21.8°C | 15 mm | 68% | 5.5 m/s | — |
| 1982 | 31.4°C | 29.4°C | 27.5°C | 33.1°C | 25.2°C | 2 mm | 59% | 3.7 m/s | — |
| 1981 | 32.4°C | 29.6°C | 26.9°C | 35.7°C | 25.6°C | 2 mm | 60% | 3.4 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 31.1°C with lows near 26.7°C (mean 28.9°C), based on 45 years of NASA POWER data.
April averages 20 mm of rainfall in Karratha, about average for rainfall. The wettest on record was 104 mm in 2006.
The hottest April reached 37.2°C in 1985. The coldest dipped to 20°C in 2015.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.3°C. Daytime highs moved from 30.9°C to 31.3°C and overnight lows from 26.7°C to 27.1°C over the same span.
April is one of the warmer months of the year in Karratha and about average for rainfall, so plan for around 31.1°C daytime highs and 26.7°C at night.
Not quite — April is the 9th coolest month in Karratha, averaging 28.9°C.
For April in Karratha, pack light, breathable clothing and sun protection, with typical highs of 31.1°C and lows of 26.7°C.
Relative humidity in April averages 62% — moderately humid.
Average wind speed in April is 4.1 m/s. The windiest April on record averaged 5.8 m/s (2015).
The wettest April on record was 2006 with 104 mm. On average, April sees 20 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 Karratha 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.
