January is one of the warmer months of the year in Napier, with average highs near 23.7°C and lows around 14.8°C (mean 19.3°C). It is about average for rainfall, averaging 63 mm of rainfall and 70% relative humidity across the period.
January is one of the warmer months of the year in Napier. Across 45 years of records, the warmest January in Napier was 2018 — when the month averaged 21.4°C — while the coldest was 1997 at 16.6°C. Typical January days reach 23.7°C with nights near 14.8°C. The long-term January temperature trend is broadly flat.
January is about average for rainfall in Napier, averaging 63 mm of rainfall. The wettest January on record was 2023 with 236 mm, while the driest was 1982 at 18 mm.
Relative humidity in Napier during January averages 70%. The most humid January was 2023 at 82%, and the least humid was 1983 at 59%.
January receives about 6.3 kWh/m²/day of solar energy in Napier. The sunniest January was 2009 at 7.2 kWh/m²/day, and the cloudiest was 2023 at 4.6.
Average wind speed in Napier during January is 2.8 m/s. The windiest Januarys were 2003, 2023 and 2025, among others at 3.4 m/s, while the calmest were 1981 and 1987 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.6°C | 18.9°C | 19.0°C | 19.6°C | 19.0°C | -0.6°C |
| Avg High | 24.3°C | 23.3°C | 23.5°C | 24.2°C | 23.0°C | -1.3°C |
| Avg Low | 14.9°C | 14.5°C | 14.6°C | 15.0°C | 15.0°C | +0.1°C |
| Avg Rain | 51 mm | 62 mm | 47 mm | 79 mm | 85 mm | +34 mm |
January temperatures in Napier have fallen by about 0.6°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 8°C (1984) to a record high of 32.9°C (1999).
Rainfall in January is about average for rainfall, averaging 63 mm, with a wettest year of 236 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
One of the best times to visit Napier
January is one of the best times to visit Napier. Expect days averaging 23.7°C and nights around 14.8°C (mean 19.3°C) — warmer than Napier's yearly average — with moderate rainfall (63 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 | 20.8°C | 17.0°C | 13.3°C | 26.9°C | 9.7°C | 68 mm | 75% | 3.4 m/s | 5.9 |
| 2024 | 24.1°C | 20.2°C | 16.3°C | 30.1°C | 12.9°C | 123 mm | 75% | 2.7 m/s | 6.1 |
| 2023 🌧️ | 21.0°C | 18.3°C | 15.5°C | 27.0°C | 13.4°C | 236 mm | 82% | 3.4 m/s | 4.6 |
| 2022 | 23.4°C | 19.4°C | 15.3°C | 28.8°C | 11.5°C | 25 mm | 71% | 2.6 m/s | 7.1 |
| 2021 | 24.3°C | 19.5°C | 14.8°C | 31.5°C | 11.3°C | 25 mm | 68% | 2.6 m/s | 6.6 |
| 2020 | 24.2°C | 19.5°C | 14.9°C | 30.7°C | 10.8°C | 35 mm | 66% | 2.8 m/s | 6.8 |
| 2019 | 25.4°C | 20.9°C | 16.3°C | 30.9°C | 13.8°C | 62 mm | 72% | 2.7 m/s | 7 |
| 2018 🔥 | 25.2°C | 21.4°C | 17.5°C | 30.6°C | 12.4°C | 61 mm | 75% | 2.5 m/s | 6 |
| 2017 | 24.8°C | 19.2°C | 13.7°C | 30.8°C | 8.7°C | 22 mm | 62% | 3.1 m/s | 6.8 |
| 2016 | 24.7°C | 20.1°C | 15.6°C | 29.9°C | 11.2°C | 90 mm | 71% | 2.7 m/s | 6.3 |
| 2015 | 23.9°C | 19.7°C | 15.6°C | 29.1°C | 12.8°C | 36 mm | 70% | 2.5 m/s | 6.9 |
| 2014 | 24.3°C | 19.0°C | 13.6°C | 29.1°C | 10.4°C | 34 mm | 62% | 3.3 m/s | 6.9 |
| 2013 | 24.7°C | 19.7°C | 14.6°C | 31.5°C | 10.6°C | 21 mm | 62% | 2.7 m/s | 7.1 |
| 2012 | 22.9°C | 18.4°C | 13.8°C | 27.0°C | 9.9°C | 109 mm | 71% | 2.7 m/s | 6.3 |
| 2011 | 23.2°C | 19.0°C | 14.7°C | 30.0°C | 11.7°C | 195 mm | 73% | 3 m/s | 6 |
| 2010 | 22.4°C | 18.2°C | 14.1°C | 27.9°C | 9.9°C | 160 mm | 74% | 2.9 m/s | 5.7 |
| 2009 | 24.3°C | 19.6°C | 15.0°C | 30.7°C | 11.9°C | 29 mm | 67% | 2.8 m/s | 7.2 |
| 2008 | 23.3°C | 19.2°C | 15.2°C | 29.9°C | 10.8°C | 21 mm | 72% | 2.7 m/s | 6.6 |
| 2007 | 24.0°C | 19.1°C | 14.3°C | 30.4°C | 8.3°C | 42 mm | 70% | 2.5 m/s | 6 |
| 2006 | 23.9°C | 19.3°C | 14.6°C | 30.4°C | 10.0°C | 59 mm | 71% | 3.2 m/s | 6.6 |
| 2005 | 23.0°C | 18.6°C | 14.2°C | 28.8°C | 11.3°C | 45 mm | 71% | 2.6 m/s | 6.8 |
| 2004 | 24.4°C | 20.0°C | 15.7°C | 30.0°C | 12.3°C | 85 mm | 74% | 2.4 m/s | 6.4 |
| 2003 | 23.0°C | 18.6°C | 14.2°C | 30.4°C | 9.7°C | 21 mm | 67% | 3.4 m/s | 6.2 |
| 2002 | 22.9°C | 18.7°C | 14.6°C | 31.3°C | 11.1°C | 83 mm | 71% | 2.7 m/s | 5.9 |
| 2001 | 23.5°C | 18.8°C | 14.1°C | 32.1°C | 9.8°C | 38 mm | 65% | 2.9 m/s | 6.2 |
| 2000 | 22.6°C | 18.5°C | 14.5°C | 31.3°C | 11.0°C | 43 mm | 70% | 2.7 m/s | 5.6 |
| 1999 | 23.9°C | 20.1°C | 16.3°C | 32.9°C | 13.4°C | 143 mm | 72% | 2.8 m/s | 6.3 |
| 1998 | 25.1°C | 20.0°C | 14.9°C | 31.1°C | 8.8°C | 30 mm | 65% | 2.7 m/s | 6.1 |
| 1997 ❄️ | 20.4°C | 16.6°C | 12.8°C | 25.4°C | 9.1°C | 50 mm | 73% | 3.3 m/s | 6.4 |
| 1996 | 21.6°C | 18.5°C | 15.3°C | 26.5°C | 12.8°C | 126 mm | 79% | 3 m/s | 5.5 |
| 1995 | 23.8°C | 19.2°C | 14.7°C | 28.4°C | 9.9°C | 53 mm | 67% | 2.5 m/s | 6.5 |
| 1994 | 24.7°C | 19.9°C | 15.1°C | 30.4°C | 11.3°C | 55 mm | 67% | 2.7 m/s | 6.5 |
| 1993 | 22.5°C | 17.4°C | 12.4°C | 26.7°C | 9.3°C | 51 mm | 67% | 2.9 m/s | 6.7 |
| 1992 | 23.4°C | 18.9°C | 14.4°C | 29.9°C | 9.7°C | 24 mm | 69% | 2.5 m/s | 6 |
| 1991 | 23.5°C | 18.7°C | 13.9°C | 29.1°C | 9.8°C | 45 mm | 68% | 3.1 m/s | 6.3 |
| 1990 | 23.8°C | 19.3°C | 14.8°C | 31.2°C | 10.5°C | 38 mm | 70% | 2.6 m/s | 6.1 |
| 1989 | 23.2°C | 19.5°C | 15.7°C | 29.3°C | 12.3°C | 93 mm | 75% | 2.8 m/s | 5.8 |
| 1988 | 24.0°C | 19.3°C | 14.6°C | 30.6°C | 11.9°C | 29 mm | 66% | 2.8 m/s | 7 |
| 1987 | 24.2°C | 19.6°C | 15.1°C | 29.3°C | 11.5°C | 96 mm | 68% | 2.3 m/s | 6.4 |
| 1986 | 24.4°C | 20.2°C | 16.1°C | 28.7°C | 10.5°C | 65 mm | 73% | 2.5 m/s | 5.7 |
| 1985 | 25.5°C | 20.8°C | 16.0°C | 30.1°C | 13.6°C | 44 mm | 66% | 2.6 m/s | 7 |
| 1984 | 23.2°C | 18.1°C | 13.0°C | 29.7°C | 8.0°C | 54 mm | 64% | 2.6 m/s | 6.3 |
| 1983 | 23.6°C | 18.2°C | 12.7°C | 30.5°C | 9.9°C | 22 mm | 59% | 3.4 m/s | — |
| 1982 | 25.4°C | 20.0°C | 14.6°C | 32.7°C | 10.6°C | 18 mm | 62% | 2.8 m/s | — |
| 1981 | 25.1°C | 20.5°C | 15.9°C | 32.1°C | 11.5°C | 38 mm | 72% | 2.3 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 23.7°C with lows near 14.8°C (mean 19.3°C), based on 45 years of NASA POWER data.
January averages 63 mm of rainfall in Napier, about average for rainfall. The wettest on record was 236 mm in 2023.
The hottest January reached 32.9°C in 1999. The coldest dipped to 8°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have fallen by about 0.6°C — but days and nights have moved in opposite directions. Overnight lows rose from 14.4°C to 15°C while daytime highs eased from 24.6°C to 22.7°C, narrowing the gap between day and night.
January is one of the warmer months of the year in Napier and about average for rainfall, so plan for around 23.7°C daytime highs and 14.8°C at night.
Not quite — January is the 11th coolest month in Napier, averaging 19.3°C.
For January in Napier, pack light layers you can adjust through the day, with typical highs of 23.7°C and lows of 14.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 70% — moderately humid.
Average wind speed in January is 2.8 m/s. The windiest January on record averaged 3.4 m/s (1983).
The wettest January on record was 2023 with 236 mm. On average, January sees 63 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 Napier 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.
