June is one of the cooler months of the year in Hamilton, with average highs near 13.7°C and lows around 8.4°C (mean 11.1°C). It is a relatively wet time of year, averaging 121 mm of rainfall and 86% 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 2002 — when the month averaged 12.7°C — while the coldest was 2009 at 9.2°C. Typical June days reach 13.7°C with nights near 8.4°C. The long-term trend is warming, about 0.2°C per decade.
June is a relatively wet time of year in Hamilton, averaging 121 mm of rainfall. The wettest June on record was 2025 with 218 mm, while the driest was 2017 at 60 mm.
Relative humidity in Hamilton during June averages 86%. The most humid June was 1985 at 90%, and the least humid was 2006 at 83%.
June receives about 1.9 kWh/m²/day of solar energy in Hamilton. The sunniest June was 2006 at 2.2 kWh/m²/day, and the cloudiest was 2002 at 1.5.
Average wind speed in Hamilton during June is 4 m/s. The windiest June was 2002 at 5.2 m/s, while the calmest were 1999 and 2001 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.9°C | 10.5°C | 11.1°C | 11.2°C | 12.0°C | +1.1°C |
| Avg High | 13.6°C | 13.2°C | 13.7°C | 13.9°C | 14.6°C | +1°C |
| Avg Low | 8.2°C | 7.9°C | 8.4°C | 8.5°C | 9.4°C | +1.2°C |
| Avg Rain | 122 mm | 112 mm | 107 mm | 121 mm | 162 mm | +41 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 1.3°C (1986) to a record high of 18.8°C (1998).
Rainfall in June is a relatively wet time of year, averaging 121 mm, with a wettest year of 218 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 13.7°C and nights around 8.4°C (mean 11.1°C) and higher rainfall (121 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 🌧️ | 14.6°C | 11.8°C | 9.0°C | 17.8°C | 3.5°C | 218 mm | 86% | 4 m/s | 1.9 |
| 2024 | 14.6°C | 11.8°C | 9.0°C | 18.1°C | 5.7°C | 108 mm | 88% | 3.5 m/s | 1.9 |
| 2023 | 14.4°C | 11.8°C | 9.2°C | 16.9°C | 4.3°C | 141 mm | 89% | 4 m/s | 2 |
| 2022 | 14.6°C | 12.3°C | 9.9°C | 18.4°C | 3.9°C | 211 mm | 87% | 4.2 m/s | 1.9 |
| 2021 | 14.9°C | 12.4°C | 9.9°C | 17.5°C | 4.5°C | 138 mm | 89% | 3.7 m/s | 1.7 |
| 2020 | 14.6°C | 12.1°C | 9.6°C | 16.8°C | 5.6°C | 158 mm | 88% | 4.2 m/s | 1.7 |
| 2019 | 13.8°C | 10.7°C | 7.5°C | 16.5°C | 3.2°C | 91 mm | 83% | 3.4 m/s | 2 |
| 2018 | 13.4°C | 10.6°C | 7.8°C | 16.1°C | 2.5°C | 144 mm | 87% | 3.7 m/s | 1.7 |
| 2017 | 13.7°C | 10.8°C | 7.8°C | 15.8°C | 4.0°C | 60 mm | 87% | 3.4 m/s | 2.1 |
| 2016 | 15.0°C | 12.2°C | 9.5°C | 18.2°C | 3.7°C | 116 mm | 86% | 3.9 m/s | 1.8 |
| 2015 | 13.7°C | 11.3°C | 8.8°C | 17.0°C | 2.0°C | 110 mm | 85% | 4.9 m/s | 2 |
| 2014 | 15.0°C | 12.4°C | 9.7°C | 17.2°C | 5.0°C | 160 mm | 86% | 4 m/s | 1.8 |
| 2013 | 13.5°C | 10.9°C | 8.2°C | 16.8°C | 2.9°C | 140 mm | 87% | 3.6 m/s | 1.7 |
| 2012 | 13.1°C | 10.4°C | 7.7°C | 17.1°C | 1.5°C | 75 mm | 84% | 4.3 m/s | 2 |
| 2011 | 14.4°C | 12.1°C | 9.8°C | 18.3°C | 3.7°C | 143 mm | 88% | 4 m/s | 1.7 |
| 2010 | 13.6°C | 10.9°C | 8.2°C | 16.6°C | 4.5°C | 170 mm | 87% | 4.3 m/s | 1.8 |
| 2009 ❄️ | 12.4°C | 9.2°C | 5.9°C | 16.8°C | 1.8°C | 90 mm | 86% | 4.1 m/s | 2 |
| 2008 | 14.0°C | 11.4°C | 8.7°C | 18.5°C | 4.5°C | 139 mm | 85% | 4.5 m/s | 1.9 |
| 2007 | 13.6°C | 11.1°C | 8.5°C | 17.0°C | 3.2°C | 101 mm | 84% | 4.9 m/s | 1.8 |
| 2006 | 12.7°C | 9.4°C | 6.1°C | 16.4°C | 1.7°C | 80 mm | 83% | 4 m/s | 2.2 |
| 2005 | 13.3°C | 10.6°C | 7.9°C | 15.0°C | 2.6°C | 106 mm | 86% | 4.2 m/s | 2 |
| 2004 | 13.8°C | 11.5°C | 9.2°C | 16.8°C | 4.3°C | 125 mm | 87% | 4.3 m/s | 1.8 |
| 2003 | 14.9°C | 12.5°C | 10.0°C | 18.5°C | 3.8°C | 141 mm | 87% | 4.3 m/s | 1.8 |
| 2002 🔥 | 14.8°C | 12.7°C | 10.6°C | 16.6°C | 6.2°C | 100 mm | 87% | 5.2 m/s | 1.5 |
| 2001 | 13.8°C | 10.6°C | 7.5°C | 17.7°C | 2.5°C | 98 mm | 86% | 3.1 m/s | 1.8 |
| 2000 | 14.1°C | 11.6°C | 9.1°C | 16.4°C | 4.2°C | 91 mm | 86% | 4.4 m/s | 1.8 |
| 1999 | 14.4°C | 11.4°C | 8.3°C | 18.2°C | 2.4°C | 83 mm | 85% | 3.1 m/s | 1.8 |
| 1998 | 14.8°C | 11.9°C | 9.0°C | 18.8°C | 4.0°C | 95 mm | 86% | 3.8 m/s | 1.6 |
| 1997 | 13.2°C | 10.3°C | 7.4°C | 16.2°C | 2.5°C | 92 mm | 85% | 3.9 m/s | 1.8 |
| 1996 | 12.4°C | 9.6°C | 6.8°C | 14.9°C | 2.8°C | 128 mm | 85% | 4.4 m/s | 1.8 |
| 1995 | 12.9°C | 10.6°C | 8.4°C | 16.9°C | 4.1°C | 143 mm | 87% | 4.3 m/s | 1.8 |
| 1994 | 12.8°C | 10.0°C | 7.2°C | 16.8°C | 1.5°C | 112 mm | 86% | 4.2 m/s | 2 |
| 1993 | 13.6°C | 11.5°C | 9.4°C | 16.7°C | 4.4°C | 68 mm | 87% | 4.8 m/s | 1.8 |
| 1992 | 12.1°C | 9.6°C | 7.0°C | 15.4°C | 2.0°C | 103 mm | 87% | 3.6 m/s | 2 |
| 1991 | 12.4°C | 9.9°C | 7.4°C | 15.6°C | 2.4°C | 134 mm | 86% | 4.6 m/s | 1.9 |
| 1990 | 13.0°C | 10.6°C | 8.2°C | 16.6°C | 2.7°C | 156 mm | 88% | 3.9 m/s | 1.9 |
| 1989 | 13.8°C | 11.0°C | 8.2°C | 17.0°C | 2.9°C | 123 mm | 86% | 4.1 m/s | 2 |
| 1988 | 14.0°C | 11.3°C | 8.6°C | 16.9°C | 2.1°C | 93 mm | 87% | 4.2 m/s | 1.8 |
| 1987 | 13.4°C | 10.9°C | 8.4°C | 15.3°C | 2.1°C | 103 mm | 84% | 3.5 m/s | 1.8 |
| 1986 | 13.4°C | 10.8°C | 8.3°C | 17.3°C | 1.3°C | 125 mm | 86% | 3.9 m/s | 2 |
| 1985 | 14.4°C | 11.8°C | 9.2°C | 16.6°C | 5.1°C | 182 mm | 90% | 3.4 m/s | 1.9 |
| 1984 | 14.0°C | 11.4°C | 8.8°C | 16.4°C | 2.5°C | 87 mm | 87% | 3.3 m/s | 1.8 |
| 1983 | 13.0°C | 10.3°C | 7.5°C | 15.9°C | 2.5°C | 105 mm | 87% | 4.3 m/s | — |
| 1982 | 12.7°C | 9.3°C | 5.9°C | 16.7°C | 2.2°C | 101 mm | 86% | 3.3 m/s | — |
| 1981 | 14.0°C | 11.6°C | 9.1°C | 17.7°C | 2.9°C | 178 mm | 89% | 4 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 13.7°C with lows near 8.4°C (mean 11.1°C), based on 45 years of NASA POWER data.
June averages 121 mm of rainfall in Hamilton, a relatively wet time of year. The wettest on record was 218 mm in 2025.
The hottest June reached 18.8°C in 1998. The coldest dipped to 1.3°C in 1986.
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 13.6°C to 14.6°C and overnight lows from 8.1°C to 9.4°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 13.7°C daytime highs and 8.4°C at night.
Not quite — June is the 3rd coolest month in Hamilton, averaging 11.1°C.
For June in Hamilton, pack light layers you can adjust through the day, with typical highs of 13.7°C and lows of 8.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 86% — quite humid.
Average wind speed in June is 4 m/s. The windiest June on record averaged 5.2 m/s (2002).
The wettest June on record was 2025 with 218 mm. On average, June sees 121 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.
