January is one of the warmer months of the year in Waitakere, with average highs near 21.1°C and lows around 18.1°C (mean 19.6°C). It is one of the drier months, averaging 77 mm of rainfall and 77% relative humidity across the period.
January is one of the warmer months of the year in Waitakere. Across 45 years of records, the warmest January in Waitakere was 2018 — when the month averaged 21.7°C — while the coldest was 1983 at 17.9°C. Typical January days reach 21.1°C with nights near 18.1°C. The long-term January temperature trend is broadly flat.
January is one of the drier months in Waitakere, averaging 77 mm of rainfall. The wettest January on record was 2023 with 291 mm, while the driest was 1988 at 17 mm.
Relative humidity in Waitakere during January averages 77%. The most humid January was 1989 at 82%, and the least humid was 1982 at 73%.
January receives about 6.5 kWh/m²/day of solar energy in Waitakere. The sunniest January was 2022 at 7.4 kWh/m²/day, and the cloudiest were 1989 and 2023 at 5.5.
Average wind speed in Waitakere during January is 5.2 m/s. The windiest January was 1983 at 6.5 m/s, while the calmest was 2015 at 4.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.6°C | 19.4°C | 19.4°C | 19.8°C | 20.0°C | +0.4°C |
| Avg High | 21.1°C | 21.0°C | 20.9°C | 21.2°C | 21.4°C | +0.3°C |
| Avg Low | 18.0°C | 17.9°C | 17.9°C | 18.3°C | 18.6°C | +0.6°C |
| Avg Rain | 90 mm | 64 mm | 65 mm | 77 mm | 97 mm | +8 mm |
January temperatures in Waitakere have risen by about 0.8°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 13.5°C (1997) to a record high of 25.9°C (2018).
Rainfall in January is one of the drier months, averaging 77 mm, with a wettest year of 291 mm.
One of the best times to visit Waitakere
January is one of the best times to visit Waitakere. Expect days averaging 21.1°C and nights around 18.1°C (mean 19.6°C) — warmer than Waitakere's yearly average — with moderate rainfall (77 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 | 20.4°C | 19.1°C | 17.8°C | 23.0°C | 15.4°C | 78 mm | 77% | 5.9 m/s | 7 |
| 2024 | 22.6°C | 21.1°C | 19.5°C | 25.9°C | 16.4°C | 73 mm | 78% | 4.6 m/s | 6.9 |
| 2023 🌧️ | 21.4°C | 20.2°C | 19.0°C | 23.2°C | 17.6°C | 291 mm | 81% | 6 m/s | 5.5 |
| 2022 | 22.5°C | 20.9°C | 19.2°C | 24.0°C | 17.9°C | 46 mm | 76% | 4.6 m/s | 7.4 |
| 2021 | 21.1°C | 19.7°C | 18.4°C | 23.7°C | 16.3°C | 70 mm | 76% | 4.9 m/s | 7 |
| 2020 | 20.3°C | 19.0°C | 17.6°C | 23.5°C | 15.7°C | 24 mm | 78% | 5.1 m/s | 7.3 |
| 2019 | 21.6°C | 20.3°C | 18.9°C | 25.5°C | 17.0°C | 32 mm | 80% | 5.3 m/s | 7.1 |
| 2018 🔥 | 23.1°C | 21.7°C | 20.4°C | 25.9°C | 18.3°C | 144 mm | 81% | 5.1 m/s | 6.3 |
| 2017 | 19.5°C | 18.3°C | 17.0°C | 22.1°C | 15.2°C | 83 mm | 78% | 6.2 m/s | 6.9 |
| 2016 | 22.0°C | 20.5°C | 18.9°C | 24.8°C | 15.4°C | 116 mm | 79% | 4.6 m/s | 6.3 |
| 2015 | 22.1°C | 20.5°C | 18.9°C | 24.9°C | 16.4°C | 37 mm | 75% | 4.1 m/s | 7.3 |
| 2014 | 20.1°C | 18.7°C | 17.2°C | 22.6°C | 15.4°C | 49 mm | 75% | 6.2 m/s | 6.7 |
| 2013 | 21.1°C | 19.4°C | 17.7°C | 23.5°C | 15.8°C | 27 mm | 74% | 5.7 m/s | 6.7 |
| 2012 | 19.9°C | 18.6°C | 17.4°C | 21.7°C | 15.6°C | 80 mm | 78% | 5.5 m/s | 6 |
| 2011 | 22.0°C | 20.4°C | 18.8°C | 25.3°C | 17.5°C | 142 mm | 76% | 5.2 m/s | 6.5 |
| 2010 | 20.6°C | 19.1°C | 17.7°C | 23.8°C | 15.3°C | 60 mm | 76% | 5.2 m/s | 6.7 |
| 2009 | 20.8°C | 19.4°C | 18.0°C | 23.4°C | 15.9°C | 42 mm | 76% | 4.8 m/s | 7 |
| 2008 | 22.3°C | 20.6°C | 19.0°C | 25.0°C | 17.5°C | 23 mm | 75% | 4.6 m/s | 6.8 |
| 2007 | 19.9°C | 18.7°C | 17.5°C | 23.2°C | 14.1°C | 76 mm | 81% | 5.1 m/s | 6.4 |
| 2006 | 21.4°C | 19.8°C | 18.2°C | 24.7°C | 16.1°C | 86 mm | 77% | 5.5 m/s | 6.5 |
| 2005 | 20.2°C | 18.6°C | 17.1°C | 23.9°C | 15.2°C | 38 mm | 78% | 5 m/s | 6.7 |
| 2004 | 21.7°C | 20.0°C | 18.3°C | 23.8°C | 14.0°C | 77 mm | 79% | 4.6 m/s | 6.5 |
| 2003 | 20.5°C | 19.0°C | 17.6°C | 22.5°C | 14.0°C | 90 mm | 76% | 5.3 m/s | 6.3 |
| 2002 | 21.1°C | 19.6°C | 18.1°C | 23.7°C | 16.4°C | 73 mm | 77% | 4.7 m/s | 6.7 |
| 2001 | 20.3°C | 18.9°C | 17.4°C | 22.5°C | 15.7°C | 56 mm | 75% | 5.4 m/s | 6.4 |
| 2000 | 20.6°C | 19.1°C | 17.6°C | 24.3°C | 15.5°C | 88 mm | 77% | 4.5 m/s | 6.2 |
| 1999 | 22.8°C | 21.1°C | 19.5°C | 25.6°C | 17.8°C | 98 mm | 80% | 4.9 m/s | 6 |
| 1998 | 20.9°C | 19.4°C | 17.9°C | 24.1°C | 13.5°C | 34 mm | 77% | 5.2 m/s | 6.6 |
| 1997 | 19.7°C | 18.1°C | 16.6°C | 22.2°C | 13.5°C | 40 mm | 75% | 5.6 m/s | 6.5 |
| 1996 | 22.1°C | 20.4°C | 18.7°C | 23.2°C | 15.7°C | 38 mm | 75% | 4.9 m/s | 6.6 |
| 1995 | 21.4°C | 19.7°C | 18.0°C | 23.4°C | 14.0°C | 76 mm | 75% | 5 m/s | 6 |
| 1994 | 21.9°C | 20.2°C | 18.6°C | 24.4°C | 15.3°C | 24 mm | 74% | 5 m/s | 6.6 |
| 1993 | 19.6°C | 18.2°C | 16.8°C | 21.4°C | 15.4°C | 44 mm | 79% | 6.1 m/s | 6.6 |
| 1992 | 20.8°C | 19.2°C | 17.6°C | 22.8°C | 15.5°C | 149 mm | 78% | 5.2 m/s | 6.3 |
| 1991 | 20.3°C | 18.8°C | 17.2°C | 23.1°C | 15.0°C | 55 mm | 77% | 6 m/s | 6.3 |
| 1990 | 20.7°C | 19.2°C | 17.6°C | 24.6°C | 16.1°C | 86 mm | 79% | 5.3 m/s | 5.7 |
| 1989 | 21.5°C | 20.0°C | 18.5°C | 23.7°C | 15.7°C | 216 mm | 82% | 6.3 m/s | 5.5 |
| 1988 | 20.3°C | 18.6°C | 17.0°C | 23.7°C | 15.2°C | 17 mm | 77% | 5.5 m/s | 6.7 |
| 1987 | 21.5°C | 19.8°C | 18.2°C | 23.4°C | 16.3°C | 77 mm | 76% | 5.5 m/s | 6.3 |
| 1986 | 22.3°C | 20.7°C | 19.1°C | 24.6°C | 15.5°C | 140 mm | 78% | 5.1 m/s | 6.3 |
| 1985 | 21.9°C | 20.4°C | 18.9°C | 25.2°C | 17.5°C | 96 mm | 77% | 5.1 m/s | 7.2 |
| 1984 | 19.9°C | 18.3°C | 16.7°C | 22.3°C | 14.4°C | 95 mm | 76% | 5 m/s | 6.2 |
| 1983 ❄️ | 19.5°C | 17.9°C | 16.4°C | 21.1°C | 14.4°C | 64 mm | 76% | 6.5 m/s | — |
| 1982 | 21.4°C | 19.9°C | 18.3°C | 23.3°C | 16.5°C | 44 mm | 73% | 5.5 m/s | — |
| 1981 | 22.0°C | 20.4°C | 18.7°C | 24.3°C | 16.4°C | 58 mm | 81% | 4.4 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 21.1°C with lows near 18.1°C (mean 19.6°C), based on 45 years of NASA POWER data.
January averages 77 mm of rainfall in Waitakere, one of the drier months. The wettest on record was 291 mm in 2023.
The hottest January reached 25.9°C in 2018. The coldest dipped to 13.5°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.8°C. Daytime highs moved from 20.9°C to 21.6°C and overnight lows from 17.8°C to 18.8°C over the same span.
January is one of the warmer months of the year in Waitakere and one of the drier months, so plan for around 21.1°C daytime highs and 18.1°C at night.
Not quite — January is the 11th coolest month in Waitakere, averaging 19.6°C.
For January in Waitakere, pack light layers you can adjust through the day, with typical highs of 21.1°C and lows of 18.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 77% — quite humid.
Average wind speed in January is 5.2 m/s. The windiest January on record averaged 6.5 m/s (1983).
The wettest January on record was 2023 with 291 mm. On average, January sees 77 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 Waitakere 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.
