June is one of the cooler months of the year in Blenheim, with average highs near 10°C and lows around 3.7°C (mean 6.9°C). It is a relatively wet time of year, averaging 91 mm of rainfall and 90% relative humidity across the period.
June is one of the cooler months of the year in Blenheim. Across 45 years of records, the warmest Junes in Blenheim were 2003, 2014 and 2023 — when the month averaged 8.5°C — while the coldest was 1991 at 5.1°C. Typical June days reach 10°C with nights near 3.7°C. The long-term trend is warming, about 0.3°C per decade.
June is a relatively wet time of year in Blenheim, averaging 91 mm of rainfall. The wettest June on record was 2025 with 208 mm, while the driest was 1983 at 35 mm.
Relative humidity in Blenheim during June averages 90%. The most humid June was 1985 at 93%, and the least humid were 1991 and 2001 at 87%.
June receives about 1.6 kWh/m²/day of solar energy in Blenheim. The sunniest Junes were 2006, 2008 and 2017, among others at 1.8 kWh/m²/day, and the cloudiest were 2001, 2002 and 2021 at 1.4.
Average wind speed in Blenheim during June is 2.1 m/s. The windiest June was 2003 at 2.6 m/s, while the calmest were 1987, 2009 and 2011 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.8°C | 6.1°C | 6.9°C | 7.0°C | 8.0°C | +1.2°C |
| Avg High | 9.9°C | 9.3°C | 10.3°C | 10.1°C | 10.7°C | +0.8°C |
| Avg Low | 3.7°C | 2.9°C | 3.6°C | 3.9°C | 5.2°C | +1.5°C |
| Avg Rain | 84 mm | 93 mm | 69 mm | 99 mm | 124 mm | +41 mm |
June temperatures in Blenheim have risen by about 1°C between 1981–1985 and 2021–2025.
June has ranged from a record low of -2°C (1994) to a record high of 16.9°C (2008).
Rainfall in June is a relatively wet time of year, averaging 91 mm, with a wettest year of 208 mm.
A quieter season to visit Blenheim
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Blenheim. That said, June — with days averaging 10°C and nights around 3.7°C (mean 6.9°C) and higher rainfall (91 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 🌧️ | 10.4°C | 7.4°C | 4.3°C | 14.8°C | -1.5°C | 208 mm | 92% | 2 m/s | 1.6 |
| 2024 | 10.8°C | 8.1°C | 5.4°C | 14.8°C | 1.1°C | 130 mm | 92% | 1.8 m/s | 1.6 |
| 2023 | 11.1°C | 8.5°C | 5.9°C | 14.0°C | 1.8°C | 76 mm | 93% | 1.8 m/s | 1.7 |
| 2022 | 10.5°C | 7.9°C | 5.2°C | 14.0°C | 2.1°C | 128 mm | 92% | 2.5 m/s | 1.5 |
| 2021 | 10.9°C | 8.1°C | 5.3°C | 13.9°C | 0.1°C | 102 mm | 93% | 2.1 m/s | 1.4 |
| 2020 | 10.7°C | 7.9°C | 5.1°C | 14.4°C | 0.8°C | 102 mm | 93% | 2.2 m/s | 1.6 |
| 2019 | 10.2°C | 6.8°C | 3.3°C | 14.9°C | -0.8°C | 62 mm | 89% | 1.8 m/s | 1.7 |
| 2018 | 9.4°C | 6.6°C | 3.8°C | 12.8°C | 0.1°C | 123 mm | 92% | 2.1 m/s | 1.6 |
| 2017 | 9.8°C | 6.7°C | 3.6°C | 12.3°C | -0.6°C | 40 mm | 92% | 1.8 m/s | 1.8 |
| 2016 | 11.3°C | 8.1°C | 4.9°C | 14.2°C | 0.5°C | 104 mm | 92% | 1.9 m/s | 1.6 |
| 2015 | 9.8°C | 6.6°C | 3.4°C | 13.3°C | -0.2°C | 95 mm | 90% | 2.3 m/s | 1.6 |
| 2014 | 11.3°C | 8.5°C | 5.6°C | 13.3°C | 1.6°C | 99 mm | 92% | 2.1 m/s | 1.5 |
| 2013 | 9.6°C | 6.8°C | 4.0°C | 13.8°C | -0.2°C | 139 mm | 92% | 2.1 m/s | 1.5 |
| 2012 | 9.2°C | 5.8°C | 2.3°C | 12.9°C | -0.8°C | 106 mm | 90% | 2.2 m/s | 1.7 |
| 2011 | 10.6°C | 7.6°C | 4.6°C | 15.2°C | -0.1°C | 80 mm | 92% | 1.7 m/s | 1.5 |
| 2010 | 9.5°C | 6.4°C | 3.4°C | 13.6°C | -0.4°C | 146 mm | 92% | 2.1 m/s | 1.5 |
| 2009 | 8.8°C | 5.6°C | 2.5°C | 12.7°C | -0.8°C | 58 mm | 88% | 1.7 m/s | 1.7 |
| 2008 | 10.5°C | 7.0°C | 3.4°C | 16.9°C | -0.6°C | 65 mm | 89% | 2.3 m/s | 1.8 |
| 2007 | 9.2°C | 6.0°C | 2.9°C | 13.7°C | 0.2°C | 60 mm | 87% | 2.3 m/s | 1.6 |
| 2006 | 8.7°C | 5.4°C | 2.1°C | 13.3°C | -0.9°C | 81 mm | 89% | 2.3 m/s | 1.8 |
| 2005 | 9.6°C | 6.5°C | 3.3°C | 13.6°C | -1.2°C | 38 mm | 89% | 2.1 m/s | 1.7 |
| 2004 | 10.9°C | 7.7°C | 4.4°C | 14.5°C | -0.8°C | 64 mm | 89% | 2.4 m/s | 1.5 |
| 2003 🔥 | 11.9°C | 8.5°C | 5.1°C | 15.8°C | 0.5°C | 113 mm | 90% | 2.6 m/s | 1.7 |
| 2002 | 11.4°C | 8.0°C | 4.6°C | 15.2°C | -0.2°C | 96 mm | 89% | 2.3 m/s | 1.4 |
| 2001 | 11.2°C | 7.2°C | 3.3°C | 13.5°C | -0.4°C | 54 mm | 87% | 2 m/s | 1.4 |
| 2000 | 10.7°C | 7.5°C | 4.4°C | 14.1°C | 0.3°C | 60 mm | 88% | 2.4 m/s | 1.5 |
| 1999 | 10.7°C | 7.2°C | 3.8°C | 14.6°C | 0.1°C | 75 mm | 88% | 1.9 m/s | 1.7 |
| 1998 | 10.5°C | 7.1°C | 3.7°C | 15.7°C | -0.4°C | 78 mm | 88% | 1.9 m/s | 1.5 |
| 1997 | 9.5°C | 6.4°C | 3.3°C | 12.4°C | -0.9°C | 73 mm | 90% | 2 m/s | 1.6 |
| 1996 | 9.1°C | 5.8°C | 2.5°C | 12.3°C | -1.2°C | 58 mm | 89% | 2 m/s | 1.6 |
| 1995 | 8.3°C | 5.4°C | 2.5°C | 12.3°C | -0.7°C | 141 mm | 92% | 2 m/s | 1.5 |
| 1994 | 8.4°C | 5.4°C | 2.4°C | 12.1°C | -2.0°C | 127 mm | 91% | 2.1 m/s | 1.7 |
| 1993 | 9.9°C | 7.0°C | 4.0°C | 14.0°C | -0.8°C | 127 mm | 92% | 2.4 m/s | 1.5 |
| 1992 | 8.2°C | 5.2°C | 2.2°C | 11.8°C | -0.8°C | 84 mm | 89% | 2 m/s | 1.8 |
| 1991 ❄️ | 8.6°C | 5.1°C | 1.6°C | 14.1°C | -1.3°C | 91 mm | 87% | 1.9 m/s | 1.7 |
| 1990 | 9.5°C | 6.4°C | 3.3°C | 12.5°C | -0.6°C | 80 mm | 92% | 2 m/s | 1.7 |
| 1989 | 9.4°C | 6.2°C | 3.1°C | 14.7°C | -1.0°C | 110 mm | 90% | 2.3 m/s | 1.6 |
| 1988 | 10.4°C | 6.9°C | 3.4°C | 14.6°C | -0.2°C | 56 mm | 89% | 2.1 m/s | 1.6 |
| 1987 | 9.9°C | 6.5°C | 3.2°C | 13.2°C | -0.6°C | 43 mm | 90% | 1.7 m/s | 1.7 |
| 1986 | 9.3°C | 6.1°C | 2.9°C | 14.4°C | -0.6°C | 98 mm | 89% | 2 m/s | 1.6 |
| 1985 | 10.6°C | 8.0°C | 5.4°C | 14.3°C | 1.6°C | 113 mm | 93% | 2 m/s | 1.5 |
| 1984 | 11.1°C | 7.5°C | 4.0°C | 14.7°C | 0.0°C | 36 mm | 91% | 1.8 m/s | 1.5 |
| 1983 | 9.4°C | 6.3°C | 3.2°C | 12.3°C | -1.4°C | 35 mm | 89% | 2.1 m/s | — |
| 1982 | 9.0°C | 6.1°C | 3.3°C | 15.5°C | 0.7°C | 146 mm | 89% | 2.1 m/s | — |
| 1981 | 9.7°C | 7.3°C | 4.8°C | 14.4°C | 1.2°C | 117 mm | 93% | 2.4 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 10°C with lows near 3.7°C (mean 6.9°C), based on 45 years of NASA POWER data.
June averages 91 mm of rainfall in Blenheim, a relatively wet time of year. The wettest on record was 208 mm in 2025.
The hottest June reached 16.9°C in 2008. The coldest dipped to -2°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 1°C. Daytime highs moved from 10°C to 10.7°C and overnight lows from 4.1°C to 5.2°C over the same span.
June is one of the cooler months of the year in Blenheim and a relatively wet time of year, so plan for around 10°C daytime highs and 3.7°C at night.
Not quite — June is the 3rd coolest month in Blenheim, averaging 6.9°C.
For June in Blenheim, pack warm layers and a jacket for chilly mornings, with typical highs of 10°C and lows of 3.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 90% — quite humid.
Average wind speed in June is 2.1 m/s. The windiest June on record averaged 2.6 m/s (2003).
The wettest June on record was 2025 with 208 mm. On average, June sees 91 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 Blenheim 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.
