January is one of the warmer months of the year in Karratha, with average highs near 31.5°C and lows around 27.6°C (mean 29.6°C). It is a relatively wet time of year, averaging 60 mm of rainfall and 72% relative humidity across the period.
January is one of the warmer months of the year in Karratha. Across 45 years of records, the warmest January in Karratha was 2021 — when the month averaged 31.4°C — while the coldest was 2016 at 28.2°C. Typical January days reach 31.5°C with nights near 27.6°C. The long-term January temperature trend is broadly flat.
January is a relatively wet time of year in Karratha, averaging 60 mm of rainfall. The wettest January on record was 2025 with 242 mm, while the driest was 2024 at 1 mm.
Relative humidity in Karratha during January averages 72%. The most humid January was 2011 at 79%, and the least humid was 2007 at 65%.
January receives about 7.6 kWh/m²/day of solar energy in Karratha. The sunniest Januarys were 1988, 1992 and 2002 at 8.1 kWh/m²/day, and the cloudiest was 2006 at 6.4.
Average wind speed in Karratha during January is 5 m/s. The windiest January was 2024 at 6 m/s, while the calmest was 2001 at 4.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.5°C | 29.5°C | 29.5°C | 29.4°C | 30.2°C | +0.7°C |
| Avg High | 31.5°C | 31.5°C | 31.5°C | 31.1°C | 32.1°C | +0.6°C |
| Avg Low | 27.4°C | 27.5°C | 27.5°C | 27.7°C | 28.4°C | +1°C |
| Avg Rain | 42 mm | 35 mm | 81 mm | 84 mm | 55 mm | +13 mm |
January temperatures in Karratha have risen by about 0.5°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 22.1°C (2007) to a record high of 41.2°C (1993).
Rainfall in January is a relatively wet time of year, averaging 60 mm, with a wettest year of 242 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
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, January — with days averaging 31.5°C and nights around 27.6°C (mean 29.6°C) and moderate rainfall (60 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 🌧️ | 32.5°C | 31.1°C | 29.8°C | 35.3°C | 28.2°C | 242 mm | 73% | 4.4 m/s | 6.6 |
| 2024 | 30.7°C | 28.6°C | 26.6°C | 35.8°C | 25.2°C | 1 mm | 72% | 6 m/s | 7.8 |
| 2023 | 31.6°C | 29.6°C | 27.6°C | 36.0°C | 25.8°C | 14 mm | 71% | 5.1 m/s | 7.6 |
| 2022 | 31.8°C | 29.9°C | 28.1°C | 39.0°C | 26.6°C | 5 mm | 72% | 5.4 m/s | 7.7 |
| 2021 🔥 | 33.6°C | 31.4°C | 29.3°C | 36.6°C | 27.3°C | 24 mm | 66% | 5.2 m/s | 7.9 |
| 2020 | 32.5°C | 30.8°C | 29.0°C | 35.5°C | 27.9°C | 46 mm | 71% | 4.9 m/s | 7.5 |
| 2019 | 31.5°C | 29.8°C | 28.1°C | 35.7°C | 25.8°C | 39 mm | 74% | 4.6 m/s | 7.6 |
| 2018 | 31.7°C | 30.1°C | 28.6°C | 34.1°C | 24.7°C | 76 mm | 73% | 4.6 m/s | 7.5 |
| 2017 | 30.5°C | 28.9°C | 27.2°C | 34.3°C | 25.5°C | 77 mm | 74% | 5.7 m/s | 7.3 |
| 2016 ❄️ | 30.1°C | 28.2°C | 26.3°C | 33.1°C | 24.8°C | 85 mm | 72% | 5.2 m/s | 7.1 |
| 2015 | 31.0°C | 29.3°C | 27.6°C | 35.4°C | 25.8°C | 19 mm | 74% | 5.2 m/s | 7.9 |
| 2014 | 31.4°C | 29.5°C | 27.7°C | 35.5°C | 26.0°C | 40 mm | 74% | 4.7 m/s | 7.4 |
| 2013 | 32.4°C | 30.5°C | 28.6°C | 35.8°C | 25.0°C | 149 mm | 71% | 4.6 m/s | 6.9 |
| 2012 | 30.1°C | 28.8°C | 27.4°C | 32.4°C | 25.8°C | 174 mm | 76% | 4.8 m/s | 7.2 |
| 2011 | 30.9°C | 29.6°C | 28.3°C | 34.7°C | 27.3°C | 170 mm | 79% | 4.7 m/s | 6.6 |
| 2010 | 31.2°C | 29.3°C | 27.3°C | 33.7°C | 25.4°C | 13 mm | 72% | 5.9 m/s | 7.8 |
| 2009 | 31.8°C | 30.0°C | 28.1°C | 36.4°C | 26.5°C | 161 mm | 75% | 4.8 m/s | 7.3 |
| 2008 | 31.7°C | 30.0°C | 28.4°C | 36.4°C | 27.0°C | 15 mm | 73% | 4.8 m/s | 7.7 |
| 2007 | 32.4°C | 30.0°C | 27.6°C | 37.3°C | 22.1°C | 28 mm | 65% | 5.6 m/s | 8 |
| 2006 | 30.4°C | 28.4°C | 26.5°C | 37.9°C | 23.9°C | 178 mm | 76% | 5.7 m/s | 6.4 |
| 2005 | 32.4°C | 30.2°C | 28.0°C | 39.1°C | 26.3°C | 7 mm | 72% | 5 m/s | 7.9 |
| 2004 | 32.1°C | 29.7°C | 27.4°C | 38.0°C | 25.9°C | 19 mm | 72% | 4.8 m/s | 7.8 |
| 2003 | 32.2°C | 30.0°C | 27.8°C | 38.2°C | 25.7°C | 166 mm | 71% | 4.6 m/s | 7.6 |
| 2002 | 30.5°C | 28.3°C | 26.2°C | 36.0°C | 23.8°C | 7 mm | 71% | 4.8 m/s | 8.1 |
| 2001 | 31.8°C | 29.9°C | 28.0°C | 37.8°C | 25.9°C | 160 mm | 75% | 4.1 m/s | 7.2 |
| 2000 | 30.1°C | 28.5°C | 26.9°C | 32.7°C | 25.1°C | 65 mm | 73% | 4.6 m/s | 7.6 |
| 1999 | 31.6°C | 29.8°C | 28.1°C | 35.4°C | 25.6°C | 14 mm | 73% | 4.7 m/s | 7.8 |
| 1998 | 31.0°C | 29.0°C | 27.1°C | 35.2°C | 24.8°C | 12 mm | 74% | 5.4 m/s | 7.6 |
| 1997 | 30.7°C | 29.2°C | 27.8°C | 34.3°C | 26.3°C | 190 mm | 78% | 5 m/s | 7 |
| 1996 | 32.5°C | 30.2°C | 27.8°C | 40.0°C | 25.3°C | 4 mm | 67% | 4.7 m/s | 8 |
| 1995 | 31.3°C | 29.3°C | 27.4°C | 34.3°C | 24.8°C | 12 mm | 70% | 5.8 m/s | 7.8 |
| 1994 | 32.0°C | 29.9°C | 27.8°C | 35.9°C | 25.8°C | 14 mm | 72% | 4.4 m/s | 7.9 |
| 1993 | 32.0°C | 29.6°C | 27.3°C | 41.2°C | 26.0°C | 20 mm | 70% | 4.4 m/s | 7.9 |
| 1992 | 30.6°C | 28.3°C | 26.0°C | 35.6°C | 24.7°C | 3 mm | 69% | 5.3 m/s | 8.1 |
| 1991 | 32.9°C | 30.5°C | 28.2°C | 38.1°C | 26.8°C | 14 mm | 68% | 5.2 m/s | 7.9 |
| 1990 | 30.3°C | 28.7°C | 27.1°C | 33.9°C | 25.8°C | 69 mm | 76% | 5.3 m/s | 7.2 |
| 1989 | 32.3°C | 30.0°C | 27.7°C | 37.0°C | 25.2°C | 6 mm | 66% | 4.7 m/s | 7.8 |
| 1988 | 31.8°C | 29.6°C | 27.4°C | 40.6°C | 26.1°C | 3 mm | 70% | 4.4 m/s | 8.1 |
| 1987 | 30.5°C | 28.7°C | 26.8°C | 36.4°C | 24.1°C | 97 mm | 71% | 5.5 m/s | 7.4 |
| 1986 | 31.2°C | 29.2°C | 27.2°C | 35.0°C | 26.0°C | 22 mm | 74% | 4.5 m/s | 7.7 |
| 1985 | 31.4°C | 29.2°C | 26.9°C | 38.9°C | 24.8°C | 85 mm | 70% | 5 m/s | 7.7 |
| 1984 | 31.6°C | 29.7°C | 27.8°C | 36.0°C | 26.1°C | 14 mm | 71% | 4.8 m/s | 7.6 |
| 1983 | 31.9°C | 29.7°C | 27.4°C | 37.3°C | 26.2°C | 46 mm | 68% | 5.2 m/s | — |
| 1982 | 31.3°C | 29.5°C | 27.6°C | 38.0°C | 25.4°C | 73 mm | 73% | 4.8 m/s | — |
| 1981 | 31.7°C | 29.9°C | 28.1°C | 38.5°C | 27.3°C | 34 mm | 74% | 5.2 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 31.5°C with lows near 27.6°C (mean 29.6°C), based on 45 years of NASA POWER data.
January averages 60 mm of rainfall in Karratha, a relatively wet time of year. The wettest on record was 242 mm in 2025.
The hottest January reached 41.2°C in 1993. The coldest dipped to 22.1°C in 2007.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.5°C. Daytime highs moved from 31.6°C to 32°C and overnight lows from 27.6°C to 28.3°C over the same span.
January is one of the warmer months of the year in Karratha and a relatively wet time of year, so plan for around 31.5°C daytime highs and 27.6°C at night.
Not quite — January is the 10th coolest month in Karratha, averaging 29.6°C.
For January in Karratha, pack light, breathable clothing and sun protection, with typical highs of 31.5°C and lows of 27.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 72% — moderately humid.
Average wind speed in January is 5 m/s. The windiest January on record averaged 6 m/s (2024).
The wettest January on record was 2025 with 242 mm. On average, January sees 60 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 January, 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 January specifically, along with year-by-year records and how the month has changed over the decades.
