January is one of the warmer months of the year in Whangarei, with average highs near 23.4°C and lows around 17.1°C (mean 20.3°C). It is one of the drier months, averaging 80 mm of rainfall and 74% relative humidity across the period.
January is one of the warmer months of the year in Whangarei. Across 45 years of records, the warmest January in Whangarei was 1999 — when the month averaged 21.8°C — while the coldest was 1997 at 18.4°C. Typical January days reach 23.4°C with nights near 17.1°C. The long-term January temperature trend is broadly flat.
January is one of the drier months in Whangarei, averaging 80 mm of rainfall. The wettest January on record was 2023 with 376 mm, while the driest was 2020 at 11 mm.
Relative humidity in Whangarei during January averages 74%. The most humid January was 2023 at 83%, and the least humid was 2020 at 67%.
January receives about 6.6 kWh/m²/day of solar energy in Whangarei. The sunniest January was 2020 at 7.5 kWh/m²/day, and the cloudiest were 1989 and 2023 at 5.3.
Average wind speed in Whangarei during January is 5 m/s. The windiest January was 2023 at 6.5 m/s, while the calmest was 2015 at 3.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.3°C | 20.2°C | 19.9°C | 20.4°C | 20.6°C | +0.3°C |
| Avg High | 23.5°C | 23.3°C | 23.0°C | 23.7°C | 23.5°C | 0°C |
| Avg Low | 17.0°C | 17.1°C | 16.9°C | 17.2°C | 17.5°C | +0.5°C |
| Avg Rain | 83 mm | 66 mm | 73 mm | 82 mm | 110 mm | +27 mm |
January temperatures in Whangarei have stayed relatively stable across the record.
January has ranged from a record low of 11.5°C (1997) to a record high of 29.2°C (2020).
Rainfall in January is one of the drier months, averaging 80 mm, with a wettest year of 376 mm.
One of the best times to visit Whangarei
January is one of the best times to visit Whangarei. Expect days averaging 23.4°C and nights around 17.1°C (mean 20.3°C) — warmer than Whangarei's yearly average — with higher rainfall (80 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 | 23.0°C | 20.0°C | 16.9°C | 24.9°C | 14.4°C | 120 mm | 72% | 5.6 m/s | 6.8 |
| 2024 | 24.0°C | 21.1°C | 18.2°C | 27.3°C | 15.0°C | 60 mm | 76% | 4.7 m/s | 6.8 |
| 2023 🌧️ | 21.9°C | 19.9°C | 17.9°C | 24.1°C | 15.8°C | 376 mm | 83% | 6.5 m/s | 5.3 |
| 2022 | 23.8°C | 20.9°C | 18.0°C | 26.5°C | 16.3°C | 45 mm | 73% | 5.1 m/s | 7 |
| 2021 | 24.0°C | 20.6°C | 17.2°C | 26.4°C | 14.3°C | 49 mm | 70% | 4.4 m/s | 7.2 |
| 2020 | 24.5°C | 20.8°C | 17.0°C | 29.2°C | 13.8°C | 11 mm | 67% | 4.2 m/s | 7.5 |
| 2019 | 25.5°C | 21.7°C | 17.9°C | 27.9°C | 16.0°C | 13 mm | 72% | 4.6 m/s | 7.4 |
| 2018 | 24.2°C | 21.7°C | 19.1°C | 27.7°C | 16.0°C | 202 mm | 80% | 5.3 m/s | 6.1 |
| 2017 | 23.8°C | 19.9°C | 16.0°C | 27.0°C | 13.9°C | 37 mm | 68% | 5.1 m/s | 7.2 |
| 2016 | 23.8°C | 21.0°C | 18.2°C | 26.8°C | 14.5°C | 151 mm | 78% | 4.6 m/s | 6.1 |
| 2015 | 24.1°C | 20.8°C | 17.6°C | 27.3°C | 14.0°C | 37 mm | 72% | 3.6 m/s | 7.4 |
| 2014 | 23.2°C | 19.6°C | 16.0°C | 26.4°C | 13.9°C | 42 mm | 70% | 5.5 m/s | 7 |
| 2013 | 23.0°C | 19.8°C | 16.5°C | 26.3°C | 14.3°C | 49 mm | 70% | 5.8 m/s | 7 |
| 2012 | 22.0°C | 18.9°C | 15.9°C | 23.5°C | 13.4°C | 73 mm | 75% | 5.1 m/s | 6.4 |
| 2011 | 23.4°C | 20.6°C | 17.8°C | 25.8°C | 15.1°C | 182 mm | 77% | 5.1 m/s | 6.4 |
| 2010 | 23.9°C | 20.3°C | 16.7°C | 26.3°C | 14.0°C | 34 mm | 68% | 5.1 m/s | 6.9 |
| 2009 | 23.6°C | 20.2°C | 16.8°C | 27.2°C | 14.4°C | 27 mm | 72% | 4.4 m/s | 7.4 |
| 2008 | 23.2°C | 20.4°C | 17.7°C | 26.0°C | 15.2°C | 83 mm | 76% | 5.5 m/s | 6.2 |
| 2007 | 23.4°C | 20.1°C | 16.8°C | 26.3°C | 13.1°C | 81 mm | 74% | 4.6 m/s | 6.7 |
| 2006 | 23.6°C | 20.4°C | 17.2°C | 26.2°C | 14.1°C | 101 mm | 74% | 5.4 m/s | 6.7 |
| 2005 | 22.1°C | 19.1°C | 16.0°C | 24.8°C | 13.6°C | 36 mm | 76% | 5.2 m/s | 6.6 |
| 2004 | 24.2°C | 20.8°C | 17.4°C | 27.8°C | 13.8°C | 64 mm | 74% | 4.3 m/s | 6.6 |
| 2003 | 22.1°C | 19.5°C | 16.8°C | 25.4°C | 14.2°C | 88 mm | 75% | 5.5 m/s | 6 |
| 2002 | 22.9°C | 19.9°C | 16.9°C | 26.3°C | 14.2°C | 54 mm | 74% | 4.9 m/s | 6.7 |
| 2001 | 22.4°C | 19.3°C | 16.2°C | 26.3°C | 14.1°C | 127 mm | 72% | 5.2 m/s | 6.6 |
| 2000 | 22.2°C | 19.4°C | 16.7°C | 25.6°C | 14.8°C | 63 mm | 75% | 5.2 m/s | 6.2 |
| 1999 🔥 | 24.7°C | 21.8°C | 18.9°C | 27.6°C | 16.3°C | 78 mm | 77% | 4.9 m/s | 6 |
| 1998 | 23.8°C | 20.5°C | 17.3°C | 27.6°C | 12.3°C | 45 mm | 72% | 4.6 m/s | 6.7 |
| 1997 ❄️ | 21.3°C | 18.4°C | 15.5°C | 25.1°C | 11.5°C | 72 mm | 74% | 6 m/s | 6.4 |
| 1996 | 23.1°C | 20.4°C | 17.7°C | 25.8°C | 15.5°C | 68 mm | 75% | 5.2 m/s | 6.5 |
| 1995 | 22.5°C | 20.0°C | 17.5°C | 25.8°C | 13.9°C | 142 mm | 75% | 5.4 m/s | 6.2 |
| 1994 | 24.4°C | 20.9°C | 17.5°C | 25.9°C | 14.1°C | 50 mm | 72% | 4.1 m/s | 7.1 |
| 1993 | 23.5°C | 19.6°C | 15.8°C | 26.6°C | 13.9°C | 17 mm | 72% | 5.3 m/s | 7 |
| 1992 | 23.1°C | 20.0°C | 16.9°C | 26.2°C | 13.5°C | 74 mm | 73% | 4.7 m/s | 6.5 |
| 1991 | 23.6°C | 20.1°C | 16.5°C | 27.0°C | 13.7°C | 46 mm | 70% | 5.1 m/s | 6.8 |
| 1990 | 23.0°C | 20.0°C | 16.9°C | 25.5°C | 14.2°C | 69 mm | 77% | 4.9 m/s | 5.9 |
| 1989 | 22.8°C | 20.4°C | 18.1°C | 26.1°C | 15.6°C | 260 mm | 82% | 6.4 m/s | 5.3 |
| 1988 | 23.2°C | 19.5°C | 15.7°C | 27.5°C | 13.8°C | 56 mm | 72% | 5.5 m/s | 6.9 |
| 1987 | 23.6°C | 20.4°C | 17.1°C | 28.0°C | 13.9°C | 73 mm | 73% | 5.9 m/s | 6.2 |
| 1986 | 23.4°C | 20.7°C | 17.9°C | 26.3°C | 14.9°C | 96 mm | 78% | 4.8 m/s | 6.1 |
| 1985 | 24.5°C | 21.1°C | 17.8°C | 26.7°C | 15.6°C | 49 mm | 72% | 4.6 m/s | 6.7 |
| 1984 | 22.3°C | 18.9°C | 15.5°C | 25.3°C | 13.4°C | 74 mm | 73% | 4.6 m/s | 6.2 |
| 1983 | 23.7°C | 19.7°C | 15.6°C | 28.4°C | 13.3°C | 23 mm | 67% | 5.3 m/s | — |
| 1982 | 24.1°C | 20.7°C | 17.2°C | 26.8°C | 15.3°C | 34 mm | 69% | 4.6 m/s | — |
| 1981 | 24.3°C | 21.2°C | 18.2°C | 26.7°C | 14.3°C | 86 mm | 77% | 4.7 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 23.4°C with lows near 17.1°C (mean 20.3°C), based on 45 years of NASA POWER data.
January averages 80 mm of rainfall in Whangarei, one of the drier months. The wettest on record was 376 mm in 2023.
The hottest January reached 29.2°C in 2020. The coldest dipped to 11.5°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 16.9°C to 17.6°C while daytime highs eased from 23.8°C to 23.3°C, narrowing the gap between day and night.
January is one of the warmer months of the year in Whangarei and one of the drier months, so plan for around 23.4°C daytime highs and 17.1°C at night.
Not quite — January is the 11th coolest month in Whangarei, averaging 20.3°C.
For January in Whangarei, pack light layers you can adjust through the day, with typical highs of 23.4°C and lows of 17.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 74% — moderately humid.
Average wind speed in January is 5 m/s. The windiest January on record averaged 6.5 m/s (2023).
The wettest January on record was 2023 with 376 mm. On average, January sees 80 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 Whangarei 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.
