June is one of the cooler months of the year in Hamilton, with average highs near 12.5°C and lows around 4.9°C (mean 8.7°C). It is a relatively wet time of year, averaging 70 mm of rainfall and 87% relative humidity across the period.
June is one of the cooler months of the year in Hamilton. Across 45 years of records, the warmest June in Hamilton was 1991 — when the month averaged 10.2°C — while the coldest was 1982 at 7.5°C. Typical June days reach 12.5°C with nights near 4.9°C. The long-term June temperature trend is broadly flat.
June is a relatively wet time of year in Hamilton, averaging 70 mm of rainfall. The wettest June on record was 1991 with 137 mm, while the driest was 2017 at 17 mm.
Relative humidity in Hamilton during June averages 87%. The most humid June was 1987 at 92%, and the least humid was 2025 at 81%.
June receives about 1.9 kWh/m²/day of solar energy in Hamilton. The sunniest Junes were 1984 and 2020 at 2.2 kWh/m²/day, and the cloudiest were 2014, 2015 and 2021, among others at 1.7.
Average wind speed in Hamilton during June is 2.7 m/s. The windiest June was 2004 at 3.6 m/s, while the calmest was 2017 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.2°C | 8.7°C | 9.0°C | 8.7°C | 8.9°C | +0.7°C |
| Avg High | 11.9°C | 12.5°C | 12.8°C | 12.6°C | 12.7°C | +0.8°C |
| Avg Low | 4.4°C | 4.9°C | 5.2°C | 4.7°C | 5.1°C | +0.7°C |
| Avg Rain | 72 mm | 82 mm | 69 mm | 66 mm | 58 mm | -14 mm |
June temperatures in Hamilton have risen by about 1.1°C between 1981–1985 and 2021–2025.
June has ranged from a record low of -1.8°C (1982) to a record high of 21.5°C (2005).
Rainfall in June is a relatively wet time of year, averaging 70 mm, with a wettest year of 137 mm.
A quieter season to visit Hamilton
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Hamilton. That said, June — with days averaging 12.5°C and nights around 4.9°C (mean 8.7°C) and moderate rainfall (70 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 | 12.5°C | 8.6°C | 4.7°C | 17.8°C | 2.1°C | 65 mm | 81% | 2.8 m/s | 1.9 |
| 2024 | 12.8°C | 8.5°C | 4.2°C | 16.5°C | 0.1°C | 20 mm | 82% | 2.3 m/s | 1.9 |
| 2023 | 12.9°C | 9.5°C | 6.2°C | 19.2°C | -0.2°C | 92 mm | 87% | 3.3 m/s | 1.8 |
| 2022 | 12.2°C | 8.9°C | 5.6°C | 15.5°C | 1.7°C | 51 mm | 87% | 3 m/s | 1.8 |
| 2021 | 13.0°C | 9.4°C | 5.8°C | 18.3°C | 1.9°C | 68 mm | 88% | 2.9 m/s | 1.7 |
| 2020 | 12.6°C | 8.4°C | 4.3°C | 16.0°C | 0.0°C | 50 mm | 87% | 2.4 m/s | 2.2 |
| 2019 | 13.2°C | 8.9°C | 4.5°C | 16.7°C | -1.0°C | 65 mm | 86% | 2.7 m/s | 2.1 |
| 2018 | 12.8°C | 8.6°C | 4.5°C | 16.9°C | 1.3°C | 44 mm | 84% | 2.5 m/s | 2 |
| 2017 | 13.0°C | 8.6°C | 4.3°C | 16.2°C | 0.3°C | 17 mm | 88% | 1.7 m/s | 2 |
| 2016 | 12.3°C | 8.4°C | 4.6°C | 15.4°C | 0.9°C | 70 mm | 88% | 2.7 m/s | 1.9 |
| 2015 | 12.4°C | 8.6°C | 4.8°C | 16.9°C | 0.7°C | 51 mm | 88% | 2.3 m/s | 1.7 |
| 2014 | 12.9°C | 9.4°C | 6.0°C | 16.5°C | 1.8°C | 114 mm | 91% | 2.9 m/s | 1.7 |
| 2013 | 13.2°C | 9.1°C | 4.9°C | 16.3°C | -0.1°C | 74 mm | 89% | 2.3 m/s | 2 |
| 2012 | 11.8°C | 8.1°C | 4.3°C | 17.5°C | -0.2°C | 100 mm | 88% | 2.8 m/s | 1.9 |
| 2011 | 12.5°C | 8.5°C | 4.5°C | 17.6°C | 1.0°C | 64 mm | 89% | 3 m/s | 2 |
| 2010 | 12.2°C | 8.3°C | 4.5°C | 16.6°C | 1.2°C | 67 mm | 88% | 2.3 m/s | 1.9 |
| 2009 | 13.0°C | 9.0°C | 4.9°C | 15.8°C | 0.4°C | 82 mm | 88% | 2.5 m/s | 1.8 |
| 2008 | 13.9°C | 10.1°C | 6.2°C | 17.1°C | 1.4°C | 46 mm | 85% | 3 m/s | 1.8 |
| 2007 | 10.9°C | 7.7°C | 4.4°C | 13.2°C | 1.5°C | 48 mm | 90% | 2.5 m/s | 2 |
| 2006 | 12.5°C | 8.0°C | 3.5°C | 15.1°C | -0.2°C | 19 mm | 85% | 2.2 m/s | 2.1 |
| 2005 | 14.3°C | 9.9°C | 5.5°C | 21.5°C | 0.5°C | 77 mm | 83% | 2.7 m/s | 1.9 |
| 2004 | 12.1°C | 8.8°C | 5.5°C | 19.3°C | 3.0°C | 131 mm | 87% | 3.6 m/s | 1.7 |
| 2003 | 12.5°C | 9.1°C | 5.7°C | 17.7°C | -0.1°C | 117 mm | 89% | 3 m/s | 1.8 |
| 2002 | 13.1°C | 9.2°C | 5.3°C | 15.9°C | 0.7°C | 62 mm | 82% | 3.3 m/s | 1.9 |
| 2001 | 13.5°C | 9.9°C | 6.4°C | 18.7°C | 1.0°C | 63 mm | 87% | 2.8 m/s | 1.8 |
| 2000 | 12.2°C | 8.6°C | 5.0°C | 15.4°C | 0.5°C | 45 mm | 89% | 2.7 m/s | 1.8 |
| 1999 | 13.0°C | 8.6°C | 4.2°C | 17.2°C | 0.8°C | 52 mm | 86% | 2.7 m/s | 2 |
| 1998 | 11.8°C | 8.0°C | 4.1°C | 20.0°C | -1.1°C | 89 mm | 87% | 2.8 m/s | 1.9 |
| 1997 | 13.1°C | 9.0°C | 4.8°C | 18.6°C | 0.6°C | 31 mm | 85% | 2.9 m/s | 1.9 |
| 1996 | 13.2°C | 9.1°C | 5.1°C | 16.8°C | 1.2°C | 115 mm | 87% | 2.7 m/s | 1.9 |
| 1995 | 11.7°C | 8.7°C | 5.6°C | 16.9°C | 0.2°C | 112 mm | 90% | 3.2 m/s | 1.7 |
| 1994 | 12.5°C | 8.5°C | 4.6°C | 16.2°C | -1.3°C | 71 mm | 88% | 2.6 m/s | 2 |
| 1993 | 12.0°C | 8.5°C | 5.1°C | 16.4°C | 1.4°C | 63 mm | 88% | 2.7 m/s | 1.8 |
| 1992 | 11.2°C | 8.0°C | 4.7°C | 15.4°C | 0.4°C | 74 mm | 92% | 2.7 m/s | 1.8 |
| 1991 🔥 🌧️ | 13.8°C | 10.2°C | 6.6°C | 16.3°C | 1.5°C | 137 mm | 90% | 2.9 m/s | 1.7 |
| 1990 | 12.6°C | 8.6°C | 4.6°C | 16.6°C | 0.8°C | 78 mm | 86% | 2.9 m/s | 2 |
| 1989 | 11.4°C | 7.9°C | 4.4°C | 14.4°C | 0.5°C | 93 mm | 90% | 2.6 m/s | 1.8 |
| 1988 | 12.6°C | 9.2°C | 5.7°C | 18.7°C | 3.6°C | 108 mm | 91% | 2.9 m/s | 1.8 |
| 1987 | 12.8°C | 9.1°C | 5.3°C | 18.4°C | 1.3°C | 70 mm | 92% | 2.4 m/s | 1.9 |
| 1986 | 11.6°C | 8.0°C | 4.5°C | 14.9°C | 1.3°C | 45 mm | 90% | 2.2 m/s | 2 |
| 1985 | 11.5°C | 7.8°C | 4.2°C | 15.4°C | 0.6°C | 75 mm | 89% | 2.7 m/s | 1.9 |
| 1984 | 12.8°C | 8.5°C | 4.1°C | 17.2°C | -0.7°C | 29 mm | 86% | 2.5 m/s | 2.2 |
| 1983 | 11.7°C | 7.9°C | 4.1°C | 15.3°C | -0.2°C | 76 mm | 91% | 2.5 m/s | — |
| 1982 ❄️ | 11.8°C | 7.5°C | 3.1°C | 14.1°C | -1.8°C | 50 mm | 85% | 2.5 m/s | — |
| 1981 | 11.3°C | 7.6°C | 4.0°C | 14.8°C | -0.9°C | 99 mm | 89% | 3.1 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 12.5°C with lows near 4.9°C (mean 8.7°C), based on 45 years of NASA POWER data.
June averages 70 mm of rainfall in Hamilton, a relatively wet time of year. The wettest on record was 137 mm in 1991.
The hottest June reached 21.5°C in 2005. The coldest dipped to -1.8°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 1.1°C. Daytime highs moved from 11.8°C to 12.7°C and overnight lows from 3.9°C to 5.3°C over the same span.
June is one of the cooler months of the year in Hamilton and a relatively wet time of year, so plan for around 12.5°C daytime highs and 4.9°C at night.
Not quite — June is the 3rd coolest month in Hamilton, averaging 8.7°C.
For June in Hamilton, pack warm layers and a jacket for chilly mornings, with typical highs of 12.5°C and lows of 4.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 87% — quite humid.
Average wind speed in June is 2.7 m/s. The windiest June on record averaged 3.6 m/s (2004).
The wettest June on record was 1991 with 137 mm. On average, June sees 70 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 Hamilton 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.
