June is one of the cooler months of the year in Northam, with average highs near 17.5°C and lows around 6.9°C (mean 12.2°C). It is a relatively wet time of year, averaging 71 mm of rainfall and 77% relative humidity across the period.
June is one of the cooler months of the year in Northam. Across 45 years of records, the warmest June in Northam was 2017 — when the month averaged 13.9°C — while the coldest was 1981 at 9.6°C. Typical June days reach 17.5°C with nights near 6.9°C. The long-term trend is warming, about 0.2°C per decade.
June is a relatively wet time of year in Northam, averaging 71 mm of rainfall. The wettest June on record was 1983 with 143 mm, while the driest was 2013 at 10 mm.
Relative humidity in Northam during June averages 77%. The most humid June was 2023 at 84%, and the least humid was 2017 at 64%.
June receives about 2.8 kWh/m²/day of solar energy in Northam. The sunniest June was 2006 at 3.3 kWh/m²/day, and the cloudiest was 2012 at 2.5.
Average wind speed in Northam during June is 2.8 m/s. The windiest June was 1992 at 3.6 m/s, while the calmest were 2001 and 2010 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.0°C | 12.0°C | 12.3°C | 12.5°C | 12.4°C | +0.4°C |
| Avg High | 17.3°C | 16.9°C | 17.7°C | 18.1°C | 17.6°C | +0.3°C |
| Avg Low | 6.7°C | 7.0°C | 6.8°C | 6.8°C | 7.3°C | +0.6°C |
| Avg Rain | 85 mm | 83 mm | 61 mm | 51 mm | 83 mm | -2 mm |
June temperatures in Northam have stayed relatively stable across the record.
June has ranged from a record low of -2.4°C (1981) to a record high of 25.2°C (1985).
Rainfall in June is a relatively wet time of year, averaging 71 mm, with a wettest year of 143 mm.
A quieter season to visit Northam
If your dates are flexible, the more temperate months of November and March tend to be the most comfortable for visiting Northam. That said, June — with days averaging 17.5°C and nights around 6.9°C (mean 12.2°C) and moderate rainfall (71 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.8°C | 13.3°C | 7.7°C | 24.3°C | 3.7°C | 83 mm | 77% | 2.5 m/s | 2.9 |
| 2024 | 18.2°C | 13.2°C | 8.3°C | 24.8°C | 3.5°C | 75 mm | 79% | 2.4 m/s | 2.7 |
| 2023 | 15.0°C | 10.3°C | 5.7°C | 19.7°C | 1.8°C | 115 mm | 84% | 2.5 m/s | 2.7 |
| 2022 | 17.9°C | 12.8°C | 7.7°C | 21.6°C | 4.0°C | 68 mm | 81% | 2.7 m/s | 2.8 |
| 2021 | 16.1°C | 11.1°C | 6.2°C | 19.9°C | 2.5°C | 55 mm | 81% | 2.3 m/s | 2.8 |
| 2020 | 19.3°C | 13.7°C | 8.1°C | 24.7°C | 2.7°C | 99 mm | 73% | 2.8 m/s | 2.8 |
| 2019 | 17.5°C | 12.2°C | 7.0°C | 23.5°C | 1.8°C | 112 mm | 72% | 3 m/s | 2.7 |
| 2018 | 17.9°C | 12.6°C | 7.3°C | 24.3°C | 3.2°C | 55 mm | 77% | 2.3 m/s | 2.7 |
| 2017 🔥 | 20.3°C | 13.9°C | 7.5°C | 25.0°C | 3.3°C | 20 mm | 64% | 2.5 m/s | 3.1 |
| 2016 | 16.2°C | 11.2°C | 6.2°C | 21.9°C | 1.3°C | 47 mm | 81% | 2.5 m/s | 2.8 |
| 2015 | 19.7°C | 13.7°C | 7.7°C | 23.9°C | 3.3°C | 35 mm | 72% | 2.8 m/s | 3 |
| 2014 | 17.6°C | 11.7°C | 5.8°C | 22.0°C | 1.7°C | 49 mm | 78% | 2.4 m/s | 2.9 |
| 2013 | 18.0°C | 12.0°C | 6.0°C | 20.5°C | 3.0°C | 10 mm | 75% | 2.2 m/s | 3.1 |
| 2012 | 17.9°C | 12.7°C | 7.5°C | 23.3°C | 1.4°C | 84 mm | 75% | 2.9 m/s | 2.5 |
| 2011 | 18.1°C | 12.8°C | 7.6°C | 22.2°C | 3.5°C | 68 mm | 76% | 3.1 m/s | 2.8 |
| 2010 | 17.8°C | 11.8°C | 5.8°C | 21.9°C | -0.3°C | 27 mm | 74% | 2.1 m/s | 2.9 |
| 2009 | 17.3°C | 12.0°C | 6.8°C | 21.9°C | 1.8°C | 83 mm | 79% | 3.1 m/s | 2.8 |
| 2008 | 18.3°C | 12.5°C | 6.8°C | 23.5°C | 3.1°C | 53 mm | 75% | 2.8 m/s | 3 |
| 2007 | 18.0°C | 12.4°C | 6.8°C | 21.8°C | 3.0°C | 38 mm | 73% | 3.3 m/s | 2.8 |
| 2006 | 18.3°C | 11.6°C | 4.9°C | 22.3°C | 0.2°C | 21 mm | 67% | 2.6 m/s | 3.3 |
| 2005 | 15.6°C | 11.3°C | 6.9°C | 22.1°C | 3.0°C | 116 mm | 83% | 2.9 m/s | 2.6 |
| 2004 | 18.0°C | 13.3°C | 8.6°C | 23.3°C | 1.2°C | 73 mm | 82% | 3.1 m/s | 2.6 |
| 2003 | 17.1°C | 11.8°C | 6.4°C | 21.5°C | 2.0°C | 84 mm | 77% | 2.9 m/s | 2.9 |
| 2002 | 18.1°C | 12.7°C | 7.4°C | 24.0°C | 3.3°C | 70 mm | 75% | 2.9 m/s | 2.7 |
| 2001 | 18.3°C | 12.2°C | 6.1°C | 23.4°C | 3.3°C | 14 mm | 75% | 2.1 m/s | 3.1 |
| 2000 | 18.4°C | 12.8°C | 7.3°C | 24.3°C | 3.3°C | 54 mm | 71% | 3 m/s | 2.8 |
| 1999 | 16.8°C | 11.9°C | 6.9°C | 19.7°C | 1.9°C | 71 mm | 82% | 2.6 m/s | 3 |
| 1998 | 16.7°C | 11.6°C | 6.5°C | 24.5°C | 1.3°C | 110 mm | 79% | 3 m/s | 2.7 |
| 1997 | 18.6°C | 13.4°C | 8.2°C | 24.5°C | 2.6°C | 44 mm | 76% | 2.7 m/s | 2.8 |
| 1996 | 18.3°C | 13.4°C | 8.5°C | 22.3°C | 4.0°C | 109 mm | 76% | 3.1 m/s | 2.6 |
| 1995 | 15.5°C | 10.8°C | 6.1°C | 23.1°C | 1.0°C | 93 mm | 83% | 2.9 m/s | 2.7 |
| 1994 | 17.0°C | 11.8°C | 6.7°C | 22.1°C | 1.6°C | 71 mm | 79% | 2.4 m/s | 2.9 |
| 1993 | 15.3°C | 10.6°C | 5.8°C | 18.2°C | 2.5°C | 71 mm | 82% | 3.1 m/s | 2.7 |
| 1992 | 17.3°C | 12.6°C | 7.9°C | 21.6°C | 2.7°C | 107 mm | 80% | 3.6 m/s | 2.8 |
| 1991 | 17.3°C | 13.0°C | 8.6°C | 22.2°C | 5.2°C | 110 mm | 81% | 2.9 m/s | 2.6 |
| 1990 | 16.5°C | 10.4°C | 4.4°C | 24.4°C | 0.3°C | 43 mm | 72% | 2.6 m/s | 3.1 |
| 1989 | 16.2°C | 10.8°C | 5.5°C | 20.1°C | 1.1°C | 64 mm | 80% | 2.6 m/s | 3 |
| 1988 | 17.5°C | 12.9°C | 8.4°C | 22.3°C | 1.5°C | 92 mm | 83% | 3.1 m/s | 2.7 |
| 1987 | 18.0°C | 12.8°C | 7.7°C | 22.9°C | 2.6°C | 79 mm | 77% | 2.8 m/s | 2.6 |
| 1986 | 17.1°C | 12.1°C | 7.0°C | 22.9°C | 3.1°C | 104 mm | 80% | 3.2 m/s | 2.7 |
| 1985 | 19.4°C | 13.6°C | 7.9°C | 25.2°C | 1.6°C | 44 mm | 76% | 2.5 m/s | 2.8 |
| 1984 | 17.7°C | 11.5°C | 5.2°C | 23.4°C | 0.7°C | 38 mm | 77% | 2.4 m/s | 3.2 |
| 1983 🌧️ | 19.1°C | 13.8°C | 8.5°C | 22.5°C | 4.8°C | 143 mm | 76% | 2.9 m/s | — |
| 1982 | 16.6°C | 10.9°C | 5.1°C | 22.1°C | 0.1°C | 97 mm | 76% | 2.8 m/s | — |
| 1981 ❄️ | 14.3°C | 9.6°C | 4.9°C | 18.3°C | -2.4°C | 103 mm | 83% | 3.1 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 17.5°C with lows near 6.9°C (mean 12.2°C), based on 45 years of NASA POWER data.
June averages 71 mm of rainfall in Northam, a relatively wet time of year. The wettest on record was 143 mm in 1983.
The hottest June reached 25.2°C in 1985. The coldest dipped to -2.4°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 6.3°C to 7.1°C while daytime highs eased from 17.4°C to 17.2°C, narrowing the gap between day and night.
June is one of the cooler months of the year in Northam and a relatively wet time of year, so plan for around 17.5°C daytime highs and 6.9°C at night.
Not quite — June is the 3rd coolest month in Northam, averaging 12.2°C.
For June in Northam, pack warm layers and a jacket for chilly mornings, with typical highs of 17.5°C and lows of 6.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 77% — quite humid.
Average wind speed in June is 2.8 m/s. The windiest June on record averaged 3.6 m/s (1992).
The wettest June on record was 1983 with 143 mm. On average, June sees 71 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 June, 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 June specifically, along with year-by-year records and how the month has changed over the decades.
