January is one of the warmer months of the year in Tumby Bay, with average highs near 22.5°C and lows around 18.1°C (mean 20.3°C). It is one of the drier months, averaging 17 mm of rainfall and 71% relative humidity across the period.
January is one of the warmer months of the year in Tumby Bay. Across 45 years of records, the warmest January in Tumby Bay was 2001 — when the month averaged 22.2°C — while the coldest were 1987 and 1992 at 18.1°C. Typical January days reach 22.5°C with nights near 18.1°C. The long-term trend is warming, about 0.3°C per decade.
January is one of the drier months in Tumby Bay, averaging 17 mm of rainfall. The wettest January on record was 2015 with 118 mm, while the driest were 2018 and 2025 at 1 mm.
Relative humidity in Tumby Bay during January averages 71%. The most humid January was 2022 at 77%, and the least humid was 1982 at 67%.
January receives about 7.5 kWh/m²/day of solar energy in Tumby Bay. The sunniest January was 2009 at 8.4 kWh/m²/day, and the cloudiest were 2006 and 2022 at 6.9.
Average wind speed in Tumby Bay during January is 5.5 m/s. The windiest Januarys were 1994 and 1996 at 6.2 m/s, while the calmest was 1993 at 4.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.0°C | 19.7°C | 20.3°C | 21.2°C | 20.6°C | +0.6°C |
| Avg High | 22.3°C | 21.9°C | 22.5°C | 23.4°C | 22.5°C | +0.2°C |
| Avg Low | 17.6°C | 17.5°C | 18.1°C | 19.0°C | 18.6°C | +1°C |
| Avg Rain | 10 mm | 15 mm | 13 mm | 24 mm | 27 mm | +17 mm |
January temperatures in Tumby Bay have stayed relatively stable across the record.
January has ranged from a record low of 14.2°C (1987) to a record high of 39°C (2009).
Rainfall in January is one of the drier months, averaging 17 mm, with a wettest year of 118 mm.
One of the best times to visit Tumby Bay
January is one of the best times to visit Tumby Bay. Expect days averaging 22.5°C and nights around 18.1°C (mean 20.3°C) — warmer than Tumby Bay's yearly average — with low rainfall (17 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 | 23.8°C | 21.7°C | 19.6°C | 31.4°C | 17.7°C | 1 mm | 70% | 5.3 m/s | 7.9 |
| 2024 | 21.9°C | 20.0°C | 18.2°C | 30.9°C | 16.1°C | 101 mm | 77% | 5.2 m/s | 7.2 |
| 2023 | 22.3°C | 20.4°C | 18.4°C | 33.4°C | 16.4°C | 14 mm | 73% | 5.5 m/s | 7.4 |
| 2022 | 22.7°C | 20.9°C | 19.0°C | 27.9°C | 16.7°C | 17 mm | 77% | 5.2 m/s | 6.9 |
| 2021 | 21.5°C | 19.6°C | 17.8°C | 33.2°C | 15.8°C | 24 mm | 73% | 5.6 m/s | 7.2 |
| 2020 | 23.0°C | 20.7°C | 18.4°C | 34.2°C | 16.4°C | 5 mm | 69% | 5.5 m/s | 7.4 |
| 2019 | 24.4°C | 21.9°C | 19.4°C | 35.3°C | 16.8°C | 1 mm | 69% | 5 m/s | 7.7 |
| 2018 | 24.2°C | 21.9°C | 19.7°C | 35.8°C | 17.3°C | 1 mm | 68% | 5.5 m/s | 7.1 |
| 2017 | 23.6°C | 21.1°C | 18.6°C | 32.6°C | 16.8°C | 2 mm | 71% | 5.2 m/s | 7.4 |
| 2016 | 23.4°C | 21.3°C | 19.2°C | 31.9°C | 17.1°C | 18 mm | 71% | 5.8 m/s | 7.4 |
| 2015 🌧️ | 22.0°C | 20.0°C | 18.1°C | 35.2°C | 16.1°C | 118 mm | 73% | 5.9 m/s | 7 |
| 2014 | 24.0°C | 21.6°C | 19.2°C | 35.1°C | 15.8°C | 9 mm | 68% | 5.7 m/s | 7.5 |
| 2013 | 23.2°C | 20.9°C | 18.7°C | 32.9°C | 16.7°C | 5 mm | 68% | 5.5 m/s | 7.8 |
| 2012 | 23.1°C | 21.0°C | 19.0°C | 29.8°C | 17.0°C | 12 mm | 70% | 6 m/s | 7.5 |
| 2011 | 22.5°C | 20.6°C | 18.6°C | 35.8°C | 16.7°C | 50 mm | 73% | 5 m/s | 7.5 |
| 2010 | 23.6°C | 21.4°C | 19.3°C | 35.0°C | 16.2°C | 18 mm | 67% | 5 m/s | 8 |
| 2009 | 23.5°C | 20.9°C | 18.3°C | 39.0°C | 15.6°C | 11 mm | 68% | 5.2 m/s | 8.4 |
| 2008 | 21.9°C | 20.1°C | 18.2°C | 29.3°C | 16.6°C | 14 mm | 74% | 5.9 m/s | 8.3 |
| 2007 | 22.9°C | 20.7°C | 18.6°C | 30.9°C | 16.5°C | 32 mm | 73% | 5.3 m/s | 7.4 |
| 2006 | 23.0°C | 20.9°C | 18.7°C | 38.7°C | 15.7°C | 19 mm | 74% | 5.8 m/s | 6.9 |
| 2005 | 22.4°C | 20.0°C | 17.6°C | 32.1°C | 15.7°C | 4 mm | 71% | 5.3 m/s | 7.5 |
| 2004 | 19.7°C | 18.2°C | 16.7°C | 29.2°C | 14.8°C | 5 mm | 73% | 5.5 m/s | 7.5 |
| 2003 | 23.3°C | 20.5°C | 17.8°C | 33.2°C | 14.8°C | 20 mm | 69% | 5.7 m/s | 7.7 |
| 2002 | 21.1°C | 19.0°C | 16.8°C | 32.9°C | 14.3°C | 10 mm | 71% | 5.5 m/s | 7.5 |
| 2001 🔥 | 24.7°C | 22.2°C | 19.7°C | 34.2°C | 17.6°C | 4 mm | 71% | 5.2 m/s | 7.5 |
| 2000 | 22.4°C | 20.3°C | 18.2°C | 35.9°C | 15.1°C | 13 mm | 70% | 5.7 m/s | 7 |
| 1999 | 22.4°C | 20.4°C | 18.5°C | 31.8°C | 16.0°C | 12 mm | 75% | 5.9 m/s | 7.6 |
| 1998 | 22.4°C | 20.2°C | 18.0°C | 29.4°C | 16.2°C | 7 mm | 72% | 5.8 m/s | 7.9 |
| 1997 | 22.8°C | 20.5°C | 18.1°C | 31.2°C | 15.2°C | 20 mm | 71% | 5.6 m/s | 7.7 |
| 1996 | 20.9°C | 18.7°C | 16.6°C | 30.8°C | 14.3°C | 5 mm | 72% | 6.2 m/s | 7.7 |
| 1995 | 21.5°C | 19.4°C | 17.2°C | 30.3°C | 15.0°C | 48 mm | 76% | 5.4 m/s | 7.5 |
| 1994 | 21.1°C | 18.8°C | 16.4°C | 31.9°C | 14.8°C | 9 mm | 70% | 6.2 m/s | 7.5 |
| 1993 | 22.7°C | 20.4°C | 18.1°C | 34.2°C | 15.4°C | 25 mm | 75% | 4.6 m/s | 7.2 |
| 1992 | 20.0°C | 18.1°C | 16.2°C | 29.5°C | 14.7°C | 3 mm | 72% | 5.5 m/s | 7.5 |
| 1991 | 22.9°C | 20.5°C | 18.2°C | 32.6°C | 14.9°C | 13 mm | 72% | 5.7 m/s | 7.8 |
| 1990 | 22.0°C | 19.9°C | 17.8°C | 32.8°C | 15.6°C | 13 mm | 70% | 5.5 m/s | 7.4 |
| 1989 | 21.6°C | 19.6°C | 17.7°C | 30.9°C | 14.9°C | 3 mm | 70% | 6 m/s | 7.7 |
| 1988 | 23.6°C | 20.8°C | 18.0°C | 32.8°C | 16.3°C | 25 mm | 67% | 5.3 m/s | 7.5 |
| 1987 ❄️ | 20.4°C | 18.1°C | 15.8°C | 28.8°C | 14.2°C | 17 mm | 70% | 5.3 m/s | 7.7 |
| 1986 | 21.2°C | 19.1°C | 17.0°C | 29.9°C | 14.9°C | 3 mm | 69% | 5.6 m/s | 8.1 |
| 1985 | 22.5°C | 20.1°C | 17.6°C | 32.8°C | 15.3°C | 6 mm | 68% | 5.3 m/s | 7.4 |
| 1984 | 21.7°C | 19.7°C | 17.8°C | 30.6°C | 15.4°C | 4 mm | 70% | 5.7 m/s | 7.6 |
| 1983 | 22.2°C | 19.8°C | 17.5°C | 37.6°C | 14.5°C | 5 mm | 67% | 5.3 m/s | — |
| 1982 | 23.7°C | 21.0°C | 18.4°C | 38.3°C | 16.0°C | 18 mm | 67% | 5.2 m/s | — |
| 1981 | 23.9°C | 21.4°C | 19.0°C | 31.1°C | 17.0°C | 11 mm | 71% | 5.6 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 22.5°C with lows near 18.1°C (mean 20.3°C), based on 45 years of NASA POWER data.
January averages 17 mm of rainfall in Tumby Bay, one of the drier months. The wettest on record was 118 mm in 2015.
The hottest January reached 39°C in 2009. The coldest dipped to 14.2°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.1°C — but days and nights have moved in opposite directions. Overnight lows rose from 18.1°C to 18.6°C while daytime highs eased from 22.8°C to 22.4°C, narrowing the gap between day and night.
January is one of the warmer months of the year in Tumby Bay and one of the drier months, so plan for around 22.5°C daytime highs and 18.1°C at night.
Not quite — January is the 11th coolest month in Tumby Bay, averaging 20.3°C.
For January in Tumby Bay, pack light layers you can adjust through the day, with typical highs of 22.5°C and lows of 18.1°C.
Relative humidity in January averages 71% — moderately humid.
Average wind speed in January is 5.5 m/s. The windiest January on record averaged 6.2 m/s (1994).
The wettest January on record was 2015 with 118 mm. On average, January sees 17 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 Tumby Bay 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.
