January is one of the warmer months of the year in Warrnambool, with average highs near 20.6°C and lows around 14.7°C (mean 17.7°C). It is one of the drier months, averaging 42 mm of rainfall and 73% relative humidity across the period.
January is one of the warmer months of the year in Warrnambool. Across 45 years of records, the warmest January in Warrnambool was 2022 — when the month averaged 19.5°C — while the coldest was 1992 at 15.3°C. Typical January days reach 20.6°C with nights near 14.7°C. The long-term trend is warming, about 0.3°C per decade.
January is one of the drier months in Warrnambool, averaging 42 mm of rainfall. The wettest January on record was 1991 with 140 mm, while the driest was 2019 at 3 mm.
Relative humidity in Warrnambool during January averages 73%. The most humid January was 2021 at 79%, and the least humid was 1983 at 67%.
January receives about 6.9 kWh/m²/day of solar energy in Warrnambool. The sunniest January was 2009 at 7.7 kWh/m²/day, and the cloudiest was 2001 at 6.3.
Average wind speed in Warrnambool during January is 5.1 m/s. The windiest January was 1994 at 6 m/s, while the calmest was 2011 at 4.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.5°C | 17.3°C | 17.5°C | 18.1°C | 18.2°C | +0.7°C |
| Avg High | 20.5°C | 20.2°C | 20.4°C | 21.1°C | 21.1°C | +0.6°C |
| Avg Low | 14.4°C | 14.3°C | 14.6°C | 15.2°C | 15.3°C | +0.9°C |
| Avg Rain | 35 mm | 45 mm | 35 mm | 38 mm | 68 mm | +33 mm |
January temperatures in Warrnambool have risen by about 0.4°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 10.9°C (1983) to a record high of 36.2°C (2014).
Rainfall in January is one of the drier months, averaging 42 mm, with a wettest year of 140 mm.
One of the best times to visit Warrnambool
January is one of the best times to visit Warrnambool. Expect days averaging 20.6°C and nights around 14.7°C (mean 17.7°C) — warmer than Warrnambool's yearly average — with moderate rainfall (42 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 22.2°C | 19.1°C | 16.1°C | 31.9°C | 12.9°C | 13 mm | 70% | 4.7 m/s | 7 |
| 2024 | 20.5°C | 17.9°C | 15.4°C | 28.2°C | 13.3°C | 72 mm | 79% | 5 m/s | 6.8 |
| 2023 | 20.6°C | 17.7°C | 14.9°C | 31.0°C | 13.2°C | 24 mm | 76% | 4.5 m/s | 7.2 |
| 2022 🔥 | 22.7°C | 19.5°C | 16.2°C | 30.7°C | 13.4°C | 131 mm | 77% | 4.7 m/s | 6.6 |
| 2021 | 19.5°C | 16.9°C | 14.3°C | 32.2°C | 12.1°C | 105 mm | 79% | 5.3 m/s | 6.6 |
| 2020 | 21.0°C | 17.8°C | 14.7°C | 32.6°C | 12.8°C | 65 mm | 73% | 5 m/s | 6.5 |
| 2019 | 22.2°C | 19.1°C | 16.0°C | 34.8°C | 14.1°C | 3 mm | 73% | 4.3 m/s | 7.5 |
| 2018 | 21.7°C | 18.7°C | 15.7°C | 35.2°C | 13.3°C | 31 mm | 72% | 4.8 m/s | 7.4 |
| 2017 | 20.4°C | 17.8°C | 15.2°C | 31.9°C | 12.9°C | 39 mm | 73% | 4.6 m/s | 7.1 |
| 2016 | 20.6°C | 18.0°C | 15.4°C | 30.6°C | 13.3°C | 26 mm | 74% | 4.7 m/s | 7 |
| 2015 | 20.7°C | 17.7°C | 14.8°C | 31.9°C | 13.1°C | 74 mm | 72% | 5.6 m/s | 6.6 |
| 2014 | 21.9°C | 18.5°C | 15.1°C | 36.2°C | 12.1°C | 23 mm | 71% | 5.3 m/s | 7.3 |
| 2013 | 20.6°C | 17.8°C | 15.0°C | 33.3°C | 13.0°C | 21 mm | 70% | 4.8 m/s | 7.3 |
| 2012 | 22.0°C | 18.9°C | 15.9°C | 32.9°C | 13.3°C | 30 mm | 70% | 5.7 m/s | 7 |
| 2011 | 20.3°C | 17.7°C | 15.0°C | 29.8°C | 12.6°C | 119 mm | 79% | 4.2 m/s | 6.6 |
| 2010 | 20.2°C | 17.2°C | 14.2°C | 33.0°C | 12.7°C | 18 mm | 72% | 4.7 m/s | 7 |
| 2009 | 20.6°C | 17.4°C | 14.2°C | 35.2°C | 11.5°C | 9 mm | 71% | 4.7 m/s | 7.7 |
| 2008 | 20.2°C | 17.6°C | 14.9°C | 32.1°C | 12.9°C | 19 mm | 76% | 4.8 m/s | 7.4 |
| 2007 | 21.4°C | 18.3°C | 15.2°C | 32.9°C | 12.9°C | 103 mm | 73% | 4.9 m/s | 6.4 |
| 2006 | 20.6°C | 17.7°C | 14.8°C | 34.3°C | 12.4°C | 35 mm | 75% | 4.8 m/s | 7.2 |
| 2005 | 20.6°C | 17.6°C | 14.6°C | 32.2°C | 11.4°C | 34 mm | 73% | 5.2 m/s | 7.1 |
| 2004 | 18.0°C | 16.0°C | 14.1°C | 25.7°C | 11.5°C | 42 mm | 74% | 5.2 m/s | 6.9 |
| 2003 | 21.3°C | 17.8°C | 14.4°C | 32.4°C | 12.7°C | 42 mm | 71% | 5.3 m/s | 6.9 |
| 2002 | 18.5°C | 16.0°C | 13.6°C | 27.2°C | 11.7°C | 28 mm | 77% | 5.2 m/s | 6.4 |
| 2001 | 22.4°C | 19.0°C | 15.7°C | 32.8°C | 13.5°C | 15 mm | 73% | 5 m/s | 6.3 |
| 2000 | 20.2°C | 17.4°C | 14.6°C | 31.5°C | 12.5°C | 24 mm | 73% | 5.5 m/s | 6.5 |
| 1999 | 20.6°C | 17.7°C | 14.8°C | 32.6°C | 12.9°C | 18 mm | 78% | 5.1 m/s | 6.9 |
| 1998 | 20.7°C | 17.8°C | 14.9°C | 32.8°C | 12.7°C | 36 mm | 75% | 4.9 m/s | 6.7 |
| 1997 | 22.2°C | 18.5°C | 14.8°C | 33.3°C | 12.6°C | 49 mm | 69% | 5.1 m/s | 7.1 |
| 1996 | 19.6°C | 16.6°C | 13.5°C | 33.2°C | 11.7°C | 38 mm | 75% | 5.7 m/s | 6.6 |
| 1995 | 21.1°C | 17.8°C | 14.6°C | 28.9°C | 11.7°C | 28 mm | 75% | 4.9 m/s | 6.8 |
| 1994 | 19.0°C | 16.0°C | 13.1°C | 33.1°C | 11.0°C | 55 mm | 72% | 6 m/s | 7.2 |
| 1993 | 21.0°C | 17.9°C | 14.8°C | 32.2°C | 12.4°C | 51 mm | 76% | 4.3 m/s | 6.7 |
| 1992 ❄️ | 17.4°C | 15.3°C | 13.3°C | 26.5°C | 12.1°C | 18 mm | 76% | 5.5 m/s | 6.6 |
| 1991 🌧️ | 20.2°C | 17.5°C | 14.9°C | 35.0°C | 12.8°C | 140 mm | 75% | 5.2 m/s | 6.8 |
| 1990 | 20.6°C | 17.5°C | 14.5°C | 32.6°C | 11.4°C | 17 mm | 70% | 5.1 m/s | 7.2 |
| 1989 | 21.6°C | 18.1°C | 14.7°C | 32.2°C | 12.3°C | 36 mm | 69% | 5.3 m/s | 6.9 |
| 1988 | 21.5°C | 18.4°C | 15.3°C | 32.3°C | 13.7°C | 30 mm | 71% | 4.6 m/s | 7 |
| 1987 | 18.2°C | 15.6°C | 13.1°C | 28.1°C | 11.4°C | 58 mm | 74% | 5.8 m/s | 6.6 |
| 1986 | 18.7°C | 16.2°C | 13.8°C | 29.1°C | 12.5°C | 26 mm | 74% | 5.3 m/s | 7.5 |
| 1985 | 19.8°C | 16.9°C | 14.0°C | 33.0°C | 11.7°C | 16 mm | 71% | 5.4 m/s | 7 |
| 1984 | 19.7°C | 17.0°C | 14.3°C | 27.3°C | 12.3°C | 26 mm | 71% | 5.4 m/s | 6.9 |
| 1983 | 19.7°C | 16.5°C | 13.3°C | 34.0°C | 10.9°C | 40 mm | 67% | 5.4 m/s | — |
| 1982 | 22.5°C | 19.1°C | 15.6°C | 34.4°C | 12.5°C | 33 mm | 68% | 5.3 m/s | — |
| 1981 | 22.9°C | 19.3°C | 15.8°C | 35.6°C | 13.7°C | 47 mm | 70% | 5.1 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 20.6°C with lows near 14.7°C (mean 17.7°C), based on 45 years of NASA POWER data.
January averages 42 mm of rainfall in Warrnambool, one of the drier months. The wettest on record was 140 mm in 1991.
The hottest January reached 36.2°C in 2014. The coldest dipped to 10.9°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.4°C. Daytime highs moved from 20.9°C to 21.1°C and overnight lows from 14.6°C to 15.4°C over the same span.
January is one of the warmer months of the year in Warrnambool and one of the drier months, so plan for around 20.6°C daytime highs and 14.7°C at night.
Not quite — January is the 11th coolest month in Warrnambool, averaging 17.7°C.
For January in Warrnambool, pack light layers you can adjust through the day, with typical highs of 20.6°C and lows of 14.7°C.
Relative humidity in January averages 73% — moderately humid.
Average wind speed in January is 5.1 m/s. The windiest January on record averaged 6 m/s (1994).
The wettest January on record was 1991 with 140 mm. On average, January sees 42 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 Warrnambool 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.
