January is one of the warmer months of the year in Mount Barker, with average highs near 29.5°C and lows around 13.5°C (mean 21.5°C). It is one of the drier months, averaging 23 mm of rainfall and 59% relative humidity across the period.
January is one of the warmer months of the year in Mount Barker. Across 45 years of records, the warmest January in Mount Barker was 2025 — when the month averaged 23.7°C — while the coldest was 2006 at 19.4°C. Typical January days reach 29.5°C with nights near 13.5°C. The long-term trend is warming, about 0.2°C per decade.
January is one of the drier months in Mount Barker, averaging 23 mm of rainfall. The wettest January on record was 1982 with 167 mm, while the driest were 1984 and 1986 at 2 mm.
Relative humidity in Mount Barker during January averages 59%. The most humid January was 2006 at 65%, and the least humid was 1986 at 53%.
January receives about 7.5 kWh/m²/day of solar energy in Mount Barker. The sunniest January was 2017 at 8.4 kWh/m²/day, and the cloudiest was 1989 at 6.2.
Average wind speed in Mount Barker during January is 4 m/s. The windiest January was 2021 at 4.5 m/s, while the calmest was 1982 at 3.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.2°C | 21.4°C | 21.1°C | 22.0°C | 22.2°C | +1°C |
| Avg High | 29.4°C | 29.5°C | 28.7°C | 30.0°C | 30.3°C | +0.9°C |
| Avg Low | 13.0°C | 13.3°C | 13.4°C | 14.0°C | 14.1°C | +1.1°C |
| Avg Rain | 35 mm | 14 mm | 23 mm | 31 mm | 8 mm | -27 mm |
January temperatures in Mount Barker have risen by about 1.1°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 7.5°C (1988) to a record high of 45.2°C (1991).
Rainfall in January is one of the drier months, averaging 23 mm, with a wettest year of 167 mm.
One of the best times to visit Mount Barker
January is one of the best times to visit Mount Barker. Expect days averaging 29.5°C and nights around 13.5°C (mean 21.5°C) — warmer than Mount Barker's yearly average — with low rainfall (23 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 🔥 | 32.5°C | 23.7°C | 14.9°C | 42.9°C | 10.1°C | 9 mm | 55% | 3.9 m/s | 7.3 |
| 2024 | 30.5°C | 22.4°C | 14.2°C | 40.7°C | 10.2°C | 8 mm | 60% | 4.3 m/s | 7.4 |
| 2023 | 29.8°C | 21.5°C | 13.3°C | 40.0°C | 10.6°C | 2 mm | 57% | 4.3 m/s | 7.8 |
| 2022 | 30.6°C | 22.7°C | 14.7°C | 40.6°C | 13.1°C | 4 mm | 58% | 4.3 m/s | 7.7 |
| 2021 | 29.4°C | 21.7°C | 14.0°C | 41.2°C | 10.1°C | 6 mm | 57% | 4.5 m/s | 7.5 |
| 2020 | 29.2°C | 21.4°C | 13.6°C | 40.5°C | 10.0°C | 19 mm | 58% | 3.8 m/s | 7.6 |
| 2019 | 29.7°C | 21.5°C | 13.3°C | 42.1°C | 9.0°C | 14 mm | 58% | 3.9 m/s | 7.9 |
| 2018 | 28.7°C | 21.1°C | 13.4°C | 35.4°C | 9.9°C | 28 mm | 61% | 3.9 m/s | 7.6 |
| 2017 | 30.4°C | 21.4°C | 12.4°C | 40.6°C | 8.7°C | 4 mm | 55% | 3.8 m/s | 8.4 |
| 2016 | 28.5°C | 21.7°C | 14.8°C | 37.7°C | 11.2°C | 99 mm | 65% | 4.2 m/s | 6.5 |
| 2015 | 30.7°C | 22.4°C | 14.2°C | 40.6°C | 10.4°C | 9 mm | 55% | 4.1 m/s | 8 |
| 2014 | 31.2°C | 22.7°C | 14.2°C | 44.4°C | 10.4°C | 3 mm | 57% | 3.9 m/s | 8 |
| 2013 | 30.3°C | 22.6°C | 14.9°C | 40.6°C | 9.7°C | 27 mm | 57% | 3.9 m/s | 7.6 |
| 2012 | 29.7°C | 22.2°C | 14.7°C | 40.0°C | 11.6°C | 20 mm | 60% | 4.3 m/s | 6.9 |
| 2011 | 29.8°C | 22.0°C | 14.2°C | 38.2°C | 11.5°C | 94 mm | 62% | 4.1 m/s | 7.3 |
| 2010 | 30.6°C | 22.1°C | 13.6°C | 43.6°C | 9.0°C | 11 mm | 57% | 4.2 m/s | 7.6 |
| 2009 | 29.6°C | 21.8°C | 14.0°C | 41.9°C | 10.6°C | 11 mm | 63% | 3.8 m/s | 7.5 |
| 2008 | 28.8°C | 21.2°C | 13.5°C | 38.6°C | 9.0°C | 20 mm | 63% | 4.3 m/s | 7.2 |
| 2007 | 28.6°C | 21.1°C | 13.5°C | 41.7°C | 8.5°C | 21 mm | 60% | 4 m/s | 7.3 |
| 2006 ❄️ | 26.4°C | 19.4°C | 12.5°C | 36.3°C | 8.0°C | 43 mm | 65% | 3.8 m/s | 6.5 |
| 2005 | 29.0°C | 21.1°C | 13.2°C | 38.5°C | 9.9°C | 8 mm | 57% | 3.9 m/s | 7.9 |
| 2004 | 27.9°C | 20.7°C | 13.6°C | 37.1°C | 9.6°C | 24 mm | 63% | 4.4 m/s | 6.7 |
| 2003 | 30.3°C | 21.8°C | 13.2°C | 42.0°C | 9.5°C | 5 mm | 54% | 4.2 m/s | 7.9 |
| 2002 | 28.0°C | 20.2°C | 12.5°C | 37.6°C | 8.0°C | 6 mm | 63% | 4 m/s | 7.3 |
| 2001 | 30.7°C | 22.4°C | 14.0°C | 39.8°C | 8.1°C | 16 mm | 60% | 3.9 m/s | 7.1 |
| 2000 | 27.7°C | 20.9°C | 14.1°C | 36.1°C | 10.8°C | 75 mm | 64% | 4.3 m/s | 6.8 |
| 1999 | 28.3°C | 20.9°C | 13.4°C | 38.9°C | 8.3°C | 24 mm | 63% | 4.4 m/s | 7 |
| 1998 | 30.9°C | 22.3°C | 13.7°C | 41.4°C | 9.9°C | 4 mm | 55% | 4 m/s | 8.1 |
| 1997 | 31.0°C | 22.5°C | 14.0°C | 43.0°C | 11.1°C | 6 mm | 55% | 4.2 m/s | 7.7 |
| 1996 | 27.7°C | 20.2°C | 12.7°C | 35.7°C | 9.4°C | 9 mm | 62% | 4.2 m/s | 7.4 |
| 1995 | 29.8°C | 22.0°C | 14.2°C | 38.3°C | 11.5°C | 12 mm | 60% | 4.3 m/s | 7.3 |
| 1994 | 29.6°C | 21.1°C | 12.6°C | 42.7°C | 9.7°C | 5 mm | 58% | 4.2 m/s | 8.1 |
| 1993 | 30.6°C | 22.0°C | 13.5°C | 38.3°C | 9.2°C | 4 mm | 59% | 3.6 m/s | 8 |
| 1992 | 29.5°C | 21.5°C | 13.4°C | 37.7°C | 8.4°C | 7 mm | 59% | 4.1 m/s | 7.7 |
| 1991 | 29.7°C | 21.5°C | 13.3°C | 45.2°C | 9.4°C | 10 mm | 58% | 3.9 m/s | 7.5 |
| 1990 | 27.7°C | 20.0°C | 12.3°C | 40.2°C | 7.5°C | 59 mm | 58% | 4.1 m/s | 7.3 |
| 1989 | 28.3°C | 21.0°C | 13.7°C | 40.6°C | 8.6°C | 77 mm | 58% | 4 m/s | 6.2 |
| 1988 | 28.6°C | 20.6°C | 12.6°C | 40.4°C | 7.5°C | 14 mm | 59% | 3.7 m/s | 7.4 |
| 1987 | 28.7°C | 20.5°C | 12.3°C | 36.0°C | 8.3°C | 5 mm | 56% | 3.9 m/s | 7.6 |
| 1986 | 31.5°C | 22.6°C | 13.7°C | 43.4°C | 9.0°C | 2 mm | 53% | 4.4 m/s | 7.9 |
| 1985 | 29.1°C | 21.0°C | 13.0°C | 41.0°C | 8.7°C | 31 mm | 59% | 3.7 m/s | 7.7 |
| 1984 | 30.4°C | 21.7°C | 13.0°C | 42.6°C | 9.6°C | 2 mm | 55% | 3.8 m/s | 7.8 |
| 1983 | 31.1°C | 22.5°C | 13.9°C | 41.8°C | 9.5°C | 7 mm | 54% | 3.8 m/s | — |
| 1982 🌧️ | 27.2°C | 19.7°C | 12.2°C | 39.5°C | 8.4°C | 167 mm | 64% | 3.5 m/s | — |
| 1981 | 30.1°C | 21.6°C | 13.0°C | 40.8°C | 9.5°C | 8 mm | 54% | 4.2 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 29.5°C with lows near 13.5°C (mean 21.5°C), based on 45 years of NASA POWER data.
January averages 23 mm of rainfall in Mount Barker, one of the drier months. The wettest on record was 167 mm in 1982.
The hottest January reached 45.2°C in 1991. The coldest dipped to 7.5°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.1°C. Daytime highs moved from 29.6°C to 30.6°C and overnight lows from 13°C to 14.2°C over the same span.
January is one of the warmer months of the year in Mount Barker and one of the drier months, so plan for around 29.5°C daytime highs and 13.5°C at night.
Not quite — January is the 11th coolest month in Mount Barker, averaging 21.5°C.
For January in Mount Barker, pack light layers you can adjust through the day, with typical highs of 29.5°C and lows of 13.5°C.
Relative humidity in January averages 59% — moderately humid.
Average wind speed in January is 4 m/s. The windiest January on record averaged 4.5 m/s (2021).
The wettest January on record was 1982 with 167 mm. On average, January sees 23 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 Mount Barker 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.
