June is one of the cooler months of the year in Horsham, with average highs near 14.3°C and lows around 4.8°C (mean 9.6°C). It is a relatively wet time of year, averaging 49 mm of rainfall and 83% relative humidity across the period.
June is one of the cooler months of the year in Horsham. Across 45 years of records, the warmest June in Horsham was 1991 — when the month averaged 11.2°C — while the coldest was 1982 at 8°C. Typical June days reach 14.3°C with nights near 4.8°C. The long-term June temperature trend is broadly flat.
June is a relatively wet time of year in Horsham, averaging 49 mm of rainfall. The wettest June on record was 1991 with 135 mm, while the driest was 1984 at 7 mm.
Relative humidity in Horsham during June averages 83%. The most humid June was 1992 at 87%, and the least humid was 2002 at 78%.
June receives about 2.1 kWh/m²/day of solar energy in Horsham. The sunniest Junes were 2007 and 2019 at 2.4 kWh/m²/day, and the cloudiest were 2015, 2021 and 2023, among others at 1.9.
Average wind speed in Horsham during June is 2.8 m/s. The windiest June was 2004 at 3.5 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 | 9.0°C | 9.6°C | 9.9°C | 9.6°C | 9.6°C | +0.6°C |
| Avg High | 13.8°C | 14.2°C | 14.6°C | 14.4°C | 14.1°C | +0.3°C |
| Avg Low | 4.3°C | 5.0°C | 5.2°C | 4.8°C | 5.1°C | +0.8°C |
| Avg Rain | 44 mm | 61 mm | 45 mm | 43 mm | 55 mm | +11 mm |
June temperatures in Horsham have risen by about 1°C between 1981–1985 and 2021–2025.
June has ranged from a record low of -2°C (1982) to a record high of 22.6°C (1998).
Rainfall in June is a relatively wet time of year, averaging 49 mm, with a wettest year of 135 mm.
A quieter season to visit Horsham
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Horsham. That said, June — with days averaging 14.3°C and nights around 4.8°C (mean 9.6°C) and moderate rainfall (49 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 | 13.9°C | 9.2°C | 4.5°C | 19.6°C | 0.8°C | 56 mm | 78% | 2.8 m/s | 2.2 |
| 2024 | 13.8°C | 8.9°C | 4.0°C | 18.2°C | 0.6°C | 22 mm | 80% | 2.4 m/s | 2.2 |
| 2023 | 14.4°C | 10.2°C | 6.1°C | 20.4°C | 0.1°C | 107 mm | 83% | 3.4 m/s | 1.9 |
| 2022 | 13.9°C | 9.7°C | 5.4°C | 17.8°C | 1.4°C | 25 mm | 82% | 3 m/s | 2 |
| 2021 | 14.4°C | 10.3°C | 6.1°C | 18.7°C | 1.5°C | 75 mm | 84% | 3 m/s | 1.9 |
| 2020 | 14.3°C | 9.3°C | 4.2°C | 18.6°C | 0.5°C | 45 mm | 82% | 2.5 m/s | 2.3 |
| 2019 | 14.8°C | 9.8°C | 4.8°C | 18.5°C | 0.4°C | 56 mm | 82% | 2.7 m/s | 2.4 |
| 2018 | 14.2°C | 9.4°C | 4.6°C | 18.7°C | 1.1°C | 32 mm | 80% | 2.7 m/s | 2.2 |
| 2017 | 14.7°C | 9.4°C | 4.2°C | 16.8°C | 1.7°C | 14 mm | 83% | 1.7 m/s | 2.3 |
| 2016 | 14.0°C | 9.4°C | 4.7°C | 17.0°C | -0.3°C | 62 mm | 83% | 2.8 m/s | 2 |
| 2015 | 14.3°C | 9.4°C | 4.5°C | 18.0°C | 0.7°C | 41 mm | 83% | 2.4 m/s | 1.9 |
| 2014 | 14.8°C | 10.6°C | 6.3°C | 18.2°C | 2.7°C | 49 mm | 85% | 3.2 m/s | 1.9 |
| 2013 | 14.7°C | 10.0°C | 5.3°C | 18.8°C | 0.8°C | 71 mm | 83% | 2.4 m/s | 2.2 |
| 2012 | 13.8°C | 9.1°C | 4.3°C | 18.5°C | 0.2°C | 54 mm | 82% | 2.9 m/s | 2.1 |
| 2011 | 15.1°C | 9.9°C | 4.8°C | 19.6°C | 0.9°C | 24 mm | 82% | 3.1 m/s | 2.3 |
| 2010 | 14.0°C | 9.2°C | 4.5°C | 18.7°C | -0.1°C | 29 mm | 83% | 2.6 m/s | 2.1 |
| 2009 | 14.3°C | 9.9°C | 5.6°C | 20.0°C | 0.7°C | 68 mm | 84% | 2.6 m/s | 1.9 |
| 2008 | 15.4°C | 10.8°C | 6.2°C | 18.4°C | 3.3°C | 35 mm | 81% | 3.1 m/s | 2.1 |
| 2007 | 13.0°C | 8.4°C | 3.9°C | 15.8°C | 0.1°C | 15 mm | 85% | 2.8 m/s | 2.4 |
| 2006 | 14.1°C | 8.6°C | 3.1°C | 16.7°C | -0.2°C | 14 mm | 80% | 2.2 m/s | 2.3 |
| 2005 | 15.7°C | 10.6°C | 5.5°C | 21.9°C | 1.7°C | 79 mm | 79% | 2.9 m/s | 2.2 |
| 2004 | 14.4°C | 9.7°C | 5.1°C | 20.8°C | 2.4°C | 69 mm | 80% | 3.5 m/s | 2 |
| 2003 | 14.6°C | 10.2°C | 5.8°C | 20.2°C | -0.4°C | 63 mm | 83% | 2.9 m/s | 1.9 |
| 2002 | 14.8°C | 10.0°C | 5.2°C | 18.2°C | 0.8°C | 33 mm | 78% | 3.3 m/s | 2.1 |
| 2001 | 15.6°C | 10.9°C | 6.3°C | 21.5°C | 1.1°C | 52 mm | 79% | 2.8 m/s | 2.2 |
| 2000 | 14.3°C | 9.6°C | 4.8°C | 16.9°C | 0.1°C | 24 mm | 83% | 2.9 m/s | 2.1 |
| 1999 | 14.7°C | 9.6°C | 4.4°C | 19.1°C | 1.8°C | 37 mm | 82% | 2.7 m/s | 2.3 |
| 1998 | 13.8°C | 9.0°C | 4.2°C | 22.6°C | 0.1°C | 42 mm | 81% | 2.9 m/s | 2.2 |
| 1997 | 14.9°C | 9.7°C | 4.5°C | 21.1°C | 0.7°C | 18 mm | 80% | 2.7 m/s | 2.2 |
| 1996 | 14.8°C | 9.9°C | 4.9°C | 17.6°C | 1.2°C | 93 mm | 83% | 2.9 m/s | 2.1 |
| 1995 | 13.2°C | 9.4°C | 5.6°C | 16.8°C | -0.5°C | 107 mm | 86% | 3.3 m/s | 2 |
| 1994 | 14.4°C | 9.8°C | 5.2°C | 18.2°C | 0.1°C | 55 mm | 82% | 2.8 m/s | 2.2 |
| 1993 | 13.8°C | 9.2°C | 4.6°C | 18.2°C | 1.9°C | 31 mm | 83% | 2.9 m/s | 2 |
| 1992 | 13.2°C | 9.0°C | 4.8°C | 16.8°C | 1.7°C | 36 mm | 87% | 2.8 m/s | 2.1 |
| 1991 🔥 🌧️ | 15.2°C | 11.2°C | 7.1°C | 18.7°C | 2.4°C | 135 mm | 86% | 3 m/s | 2 |
| 1990 | 14.3°C | 9.5°C | 4.6°C | 17.9°C | 0.6°C | 52 mm | 82% | 3.1 m/s | 2.2 |
| 1989 | 12.8°C | 8.6°C | 4.3°C | 16.6°C | 0.1°C | 66 mm | 86% | 2.7 m/s | 2.1 |
| 1988 | 14.3°C | 10.1°C | 5.8°C | 19.8°C | 1.9°C | 76 mm | 86% | 3 m/s | 2.1 |
| 1987 | 14.6°C | 10.1°C | 5.5°C | 20.6°C | 3.0°C | 56 mm | 86% | 2.8 m/s | 2.2 |
| 1986 | 13.4°C | 8.8°C | 4.1°C | 16.9°C | 0.6°C | 22 mm | 84% | 2.4 m/s | 2.2 |
| 1985 | 13.8°C | 8.7°C | 3.7°C | 17.9°C | -0.2°C | 27 mm | 82% | 2.7 m/s | 2.2 |
| 1984 | 14.9°C | 9.4°C | 4.0°C | 21.1°C | -1.3°C | 7 mm | 80% | 2.5 m/s | 2.3 |
| 1983 | 13.7°C | 9.1°C | 4.4°C | 17.9°C | -1.4°C | 31 mm | 85% | 2.6 m/s | — |
| 1982 ❄️ | 13.4°C | 8.0°C | 2.7°C | 15.5°C | -2.0°C | 27 mm | 80% | 2.5 m/s | — |
| 1981 | 12.9°C | 8.4°C | 3.9°C | 16.8°C | -0.5°C | 85 mm | 84% | 3.2 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 14.3°C with lows near 4.8°C (mean 9.6°C), based on 45 years of NASA POWER data.
June averages 49 mm of rainfall in Horsham, a relatively wet time of year. The wettest on record was 135 mm in 1991.
The hottest June reached 22.6°C in 1998. The coldest dipped to -2°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°C. Daytime highs moved from 13.7°C to 14.1°C and overnight lows from 3.7°C to 5.2°C over the same span.
June is one of the cooler months of the year in Horsham and a relatively wet time of year, so plan for around 14.3°C daytime highs and 4.8°C at night.
Not quite — June is the 2nd coolest month in Horsham, averaging 9.6°C.
For June in Horsham, pack warm layers and a jacket for chilly mornings, with typical highs of 14.3°C and lows of 4.8°C.
Relative humidity in June averages 83% — quite humid.
Average wind speed in June is 2.8 m/s. The windiest June on record averaged 3.5 m/s (2004).
The wettest June on record was 1991 with 135 mm. On average, June sees 49 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 Horsham 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.
