January is one of the warmer months of the year in Northam, with average highs near 35.3°C and lows around 17.5°C (mean 26.4°C). It is one of the drier months, averaging 21 mm of rainfall and 38% relative humidity across the period.
January is one of the warmer months of the year in Northam. Across 45 years of records, the warmest January in Northam was 2025 — when the month averaged 29.1°C — while the coldest was 2006 at 23.5°C. Typical January days reach 35.3°C with nights near 17.5°C. The long-term trend is warming, about 0.3°C per decade.
January is one of the drier months in Northam, averaging 21 mm of rainfall. The wettest January on record was 2000 with 118 mm, while the driest was 2005 at 0 mm.
Relative humidity in Northam during January averages 38%. The most humid January was 2006 at 55%, and the least humid were 1983 and 1986 at 31%.
January receives about 8.4 kWh/m²/day of solar energy in Northam. The sunniest January was 1994 at 9 kWh/m²/day, and the cloudiest was 2016 at 7.2.
Average wind speed in Northam during January is 4.2 m/s. The windiest January was 2021 at 4.9 m/s, while the calmest was 1992 at 3.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.9°C | 26.6°C | 25.9°C | 26.6°C | 27.4°C | +1.5°C |
| Avg High | 34.9°C | 35.7°C | 34.6°C | 35.3°C | 36.2°C | +1.3°C |
| Avg Low | 16.9°C | 17.4°C | 17.1°C | 18.0°C | 18.6°C | +1.7°C |
| Avg Rain | 12 mm | 16 mm | 33 mm | 32 mm | 4 mm | -9 mm |
January temperatures in Northam have risen by about 1.7°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 7.4°C (1990) to a record high of 46.4°C (2008).
Rainfall in January is one of the drier months, averaging 21 mm, with a wettest year of 118 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit Northam
January is a good time to visit Northam, with days averaging 35.3°C and nights around 17.5°C (mean 26.4°C, warmer than Northam's yearly average) and low rainfall. November and March are marginally more temperate, but January still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🔥 | 37.9°C | 29.1°C | 20.4°C | 43.7°C | 15.0°C | 3 mm | 35% | 4 m/s | 8.1 |
| 2024 | 36.7°C | 27.8°C | 18.8°C | 44.2°C | 14.5°C | 10 mm | 38% | 4.3 m/s | 8.6 |
| 2023 | 35.8°C | 26.9°C | 18.1°C | 40.7°C | 12.7°C | 3 mm | 35% | 4.4 m/s | 8.6 |
| 2022 | 36.8°C | 27.8°C | 18.8°C | 41.8°C | 13.9°C | 3 mm | 34% | 4.2 m/s | 8.8 |
| 2021 | 34.6°C | 26.2°C | 17.8°C | 40.7°C | 13.1°C | 2 mm | 35% | 4.9 m/s | 8.4 |
| 2020 | 35.5°C | 26.5°C | 17.5°C | 45.6°C | 10.8°C | 0 mm | 36% | 4 m/s | 8.6 |
| 2019 | 35.4°C | 26.2°C | 17.1°C | 43.0°C | 11.4°C | 1 mm | 36% | 3.9 m/s | 8.8 |
| 2018 | 33.5°C | 25.1°C | 16.8°C | 40.5°C | 11.6°C | 66 mm | 47% | 4.3 m/s | 8.2 |
| 2017 | 34.8°C | 25.9°C | 17.1°C | 43.0°C | 12.0°C | 91 mm | 36% | 3.8 m/s | 8.2 |
| 2016 | 33.6°C | 26.1°C | 18.6°C | 41.2°C | 12.6°C | 69 mm | 48% | 3.9 m/s | 7.2 |
| 2015 | 36.2°C | 27.3°C | 18.5°C | 43.7°C | 12.4°C | 3 mm | 32% | 4.2 m/s | 8.3 |
| 2014 | 36.2°C | 27.4°C | 18.6°C | 45.2°C | 13.3°C | 5 mm | 37% | 4.3 m/s | 8.4 |
| 2013 | 34.5°C | 26.1°C | 17.7°C | 44.5°C | 11.6°C | 41 mm | 44% | 4.1 m/s | 8.2 |
| 2012 | 34.8°C | 27.0°C | 19.2°C | 40.4°C | 12.1°C | 14 mm | 43% | 4.4 m/s | 7.8 |
| 2011 | 35.9°C | 27.3°C | 18.7°C | 42.9°C | 13.4°C | 31 mm | 43% | 4 m/s | 8 |
| 2010 | 37.8°C | 27.9°C | 18.1°C | 44.7°C | 13.2°C | 1 mm | 32% | 4.3 m/s | 8.9 |
| 2009 | 37.0°C | 27.8°C | 18.6°C | 44.7°C | 14.0°C | 33 mm | 40% | 4 m/s | 8.2 |
| 2008 | 36.7°C | 27.8°C | 18.8°C | 46.4°C | 13.6°C | 1 mm | 37% | 4.8 m/s | 8.4 |
| 2007 | 33.5°C | 24.6°C | 15.8°C | 43.2°C | 10.0°C | 24 mm | 43% | 4 m/s | 8.3 |
| 2006 ❄️ | 31.4°C | 23.5°C | 15.6°C | 37.7°C | 9.8°C | 109 mm | 55% | 4.3 m/s | 7.6 |
| 2005 | 35.5°C | 25.9°C | 16.4°C | 44.3°C | 12.2°C | 0 mm | 33% | 4 m/s | 8.8 |
| 2004 | 36.0°C | 26.9°C | 17.8°C | 42.5°C | 13.9°C | 8 mm | 40% | 4.3 m/s | 8.6 |
| 2003 | 35.1°C | 25.9°C | 16.6°C | 43.5°C | 11.2°C | 1 mm | 35% | 4.5 m/s | 8.5 |
| 2002 | 34.2°C | 25.5°C | 16.7°C | 39.2°C | 10.2°C | 14 mm | 38% | 4.1 m/s | 8.2 |
| 2001 | 35.7°C | 27.0°C | 18.3°C | 43.5°C | 10.2°C | 24 mm | 43% | 3.9 m/s | 7.8 |
| 2000 🌧️ | 31.2°C | 23.8°C | 16.4°C | 37.3°C | 12.1°C | 118 mm | 55% | 4.1 m/s | 7.3 |
| 1999 | 35.6°C | 26.8°C | 17.9°C | 42.2°C | 10.5°C | 19 mm | 43% | 4.4 m/s | 8.3 |
| 1998 | 36.8°C | 27.3°C | 17.8°C | 44.3°C | 12.3°C | 0 mm | 34% | 4 m/s | 8.8 |
| 1997 | 36.6°C | 27.6°C | 18.5°C | 45.6°C | 11.7°C | 1 mm | 31% | 4.4 m/s | 8.8 |
| 1996 | 34.9°C | 25.5°C | 16.2°C | 41.1°C | 10.8°C | 1 mm | 34% | 4.4 m/s | 8.8 |
| 1995 | 35.9°C | 27.2°C | 18.4°C | 42.6°C | 12.7°C | 9 mm | 39% | 4.6 m/s | 8.5 |
| 1994 | 35.3°C | 25.8°C | 16.3°C | 45.7°C | 12.3°C | 1 mm | 35% | 4.4 m/s | 9 |
| 1993 | 37.3°C | 27.4°C | 17.5°C | 45.0°C | 12.8°C | 1 mm | 34% | 3.9 m/s | 8.8 |
| 1992 | 34.9°C | 26.6°C | 18.2°C | 40.5°C | 12.9°C | 5 mm | 37% | 3.7 m/s | 7.8 |
| 1991 | 36.0°C | 26.7°C | 17.5°C | 45.1°C | 11.0°C | 11 mm | 35% | 4.1 m/s | 8.8 |
| 1990 | 33.5°C | 24.8°C | 16.0°C | 43.5°C | 7.4°C | 111 mm | 41% | 4.4 m/s | 7.8 |
| 1989 | 33.4°C | 25.3°C | 17.3°C | 43.5°C | 9.8°C | 16 mm | 39% | 4.3 m/s | 7.8 |
| 1988 | 34.5°C | 25.3°C | 16.0°C | 43.3°C | 8.8°C | 1 mm | 37% | 3.8 m/s | 8.8 |
| 1987 | 34.6°C | 25.4°C | 16.3°C | 42.0°C | 12.4°C | 0 mm | 36% | 4.2 m/s | 8.6 |
| 1986 | 37.1°C | 27.8°C | 18.4°C | 43.6°C | 11.7°C | 6 mm | 31% | 4.2 m/s | 8.9 |
| 1985 | 35.2°C | 25.7°C | 16.2°C | 43.9°C | 12.0°C | 14 mm | 36% | 4.1 m/s | 8.7 |
| 1984 | 35.3°C | 26.0°C | 16.8°C | 43.4°C | 12.2°C | 1 mm | 34% | 4 m/s | 8.8 |
| 1983 | 35.9°C | 26.9°C | 17.9°C | 43.2°C | 12.4°C | 1 mm | 31% | 4 m/s | — |
| 1982 | 32.7°C | 24.2°C | 15.8°C | 41.6°C | 9.5°C | 69 mm | 47% | 4.3 m/s | — |
| 1981 | 35.6°C | 26.5°C | 17.3°C | 43.9°C | 11.8°C | 2 mm | 33% | 4.7 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 35.3°C with lows near 17.5°C (mean 26.4°C), based on 45 years of NASA POWER data.
January averages 21 mm of rainfall in Northam, one of the drier months. The wettest on record was 118 mm in 2000.
The hottest January reached 46.4°C in 2008. The coldest dipped to 7.4°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.7°C. Daytime highs moved from 34.9°C to 36.4°C and overnight lows from 16.8°C to 18.8°C over the same span.
January is one of the warmer months of the year in Northam and one of the drier months, so plan for around 35.3°C daytime highs and 17.5°C at night.
Not quite — January is the 12th coolest month in Northam, averaging 26.4°C.
For January in Northam, pack light, breathable clothing and sun protection, with typical highs of 35.3°C and lows of 17.5°C.
Relative humidity in January averages 38% — relatively dry.
Average wind speed in January is 4.2 m/s. The windiest January on record averaged 4.9 m/s (2021).
The wettest January on record was 2000 with 118 mm. On average, January sees 21 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 Northam 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.
