June is one of the warmer months of the year in Round Rock, with average highs near 34.1°C and lows around 22.3°C (mean 28.2°C). It is a relatively wet time of year, averaging 90 mm of rainfall and 68% relative humidity across the period.
June is one of the warmer months of the year in Round Rock. Across 45 years of records, the warmest June in Round Rock was 2022 — when the month averaged 31.4°C — while the coldest was 1987 at 25.4°C. Typical June days reach 34.1°C with nights near 22.3°C. The long-term trend is warming, about 0.5°C per decade.
June is a relatively wet time of year in Round Rock, averaging 90 mm of rainfall. The wettest June on record was 1981 with 269 mm, while the driest was 2005 at 7 mm.
Relative humidity in Round Rock during June averages 68%. The most humid June was 1981 at 83%, and the least humid was 2022 at 51%.
June receives about 6.7 kWh/m²/day of solar energy in Round Rock. The sunniest June was 2011 at 7.6 kWh/m²/day, and the cloudiest was 2004 at 5.6.
Average wind speed in Round Rock during June is 2.8 m/s. The windiest June was 1998 at 4 m/s, while the calmest were 1992, 1997 and 2016, among others at 2.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.0°C | 28.0°C | 28.3°C | 28.6°C | 29.3°C | +2.3°C |
| Avg High | 32.7°C | 33.8°C | 34.2°C | 34.6°C | 35.4°C | +2.7°C |
| Avg Low | 21.3°C | 22.2°C | 22.3°C | 22.7°C | 23.2°C | +1.9°C |
| Avg Rain | 129 mm | 91 mm | 97 mm | 64 mm | 62 mm | -67 mm |
June temperatures in Round Rock have risen by about 2.4°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 12.4°C (1983) to a record high of 43.4°C (2012).
Rainfall in June is a relatively wet time of year, averaging 90 mm, with a wettest year of 269 mm.
A good time to visit Round Rock
June is a good time to visit Round Rock, with days averaging 34.1°C and nights around 22.3°C (mean 28.2°C, warmer than Round Rock's yearly average) and higher rainfall. October and April are marginally more temperate, but June still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 34.8°C | 29.1°C | 23.4°C | 37.1°C | 20.7°C | 89 mm | 71% | 2.7 m/s | 6.8 |
| 2024 | 35.6°C | 29.6°C | 23.7°C | 39.6°C | 20.2°C | 70 mm | 69% | 2.5 m/s | 6.9 |
| 2023 | 37.5°C | 30.5°C | 23.5°C | 43.2°C | 19.3°C | 34 mm | 64% | 2.6 m/s | 7 |
| 2022 🔥 | 38.5°C | 31.4°C | 24.3°C | 41.8°C | 19.9°C | 36 mm | 51% | 2.9 m/s | 7.5 |
| 2021 | 32.1°C | 27.2°C | 22.3°C | 36.2°C | 18.2°C | 86 mm | 77% | 2.3 m/s | 6.3 |
| 2020 | 33.9°C | 27.8°C | 21.7°C | 38.7°C | 16.6°C | 55 mm | 66% | 2.7 m/s | 6.7 |
| 2019 | 32.6°C | 27.4°C | 22.2°C | 35.4°C | 18.3°C | 127 mm | 75% | 2.5 m/s | 6.4 |
| 2018 | 36.3°C | 30.0°C | 23.8°C | 40.3°C | 21.4°C | 47 mm | 64% | 3.3 m/s | 6.9 |
| 2017 | 34.9°C | 28.7°C | 22.4°C | 40.5°C | 19.1°C | 68 mm | 67% | 2.8 m/s | 6.5 |
| 2016 | 32.0°C | 27.0°C | 22.0°C | 35.8°C | 17.2°C | 65 mm | 77% | 2.2 m/s | 6.9 |
| 2015 | 30.2°C | 26.0°C | 21.9°C | 32.5°C | 18.2°C | 102 mm | 82% | 2.3 m/s | 6.6 |
| 2014 | 33.6°C | 28.1°C | 22.6°C | 37.1°C | 16.5°C | 59 mm | 71% | 3.4 m/s | 6.2 |
| 2013 | 36.8°C | 29.7°C | 22.7°C | 42.8°C | 16.4°C | 30 mm | 58% | 2.7 m/s | 7.1 |
| 2012 | 36.6°C | 29.9°C | 23.1°C | 43.4°C | 18.6°C | 24 mm | 57% | 2.7 m/s | 6.8 |
| 2011 | 38.7°C | 31.1°C | 23.5°C | 41.9°C | 21.4°C | 32 mm | 52% | 3.5 m/s | 7.6 |
| 2010 | 34.2°C | 28.5°C | 22.9°C | 38.6°C | 18.6°C | 90 mm | 70% | 2.8 m/s | 6.4 |
| 2009 | 36.9°C | 30.0°C | 23.1°C | 41.6°C | 15.9°C | 31 mm | 56% | 3.2 m/s | 7.2 |
| 2008 | 37.7°C | 30.9°C | 24.0°C | 39.9°C | 21.3°C | 17 mm | 54% | 3.9 m/s | 7.1 |
| 2007 | 29.9°C | 25.8°C | 21.7°C | 32.4°C | 18.2°C | 193 mm | 83% | 2.4 m/s | 6 |
| 2006 | 34.6°C | 28.1°C | 21.6°C | 40.1°C | 17.5°C | 76 mm | 61% | 2.4 m/s | 7.1 |
| 2005 | 36.3°C | 29.3°C | 22.2°C | 40.3°C | 19.1°C | 7 mm | 58% | 2.5 m/s | 7.1 |
| 2004 | 30.7°C | 26.5°C | 22.3°C | 39.6°C | 19.9°C | 249 mm | 81% | 2.6 m/s | 5.6 |
| 2003 | 33.8°C | 28.0°C | 22.1°C | 37.7°C | 16.6°C | 107 mm | 69% | 2.3 m/s | 6.4 |
| 2002 | 35.0°C | 28.7°C | 22.3°C | 38.4°C | 17.9°C | 125 mm | 62% | 2.6 m/s | 6.7 |
| 2001 | 34.3°C | 28.0°C | 21.6°C | 37.9°C | 18.7°C | 59 mm | 67% | 3 m/s | 6.9 |
| 2000 | 33.3°C | 27.7°C | 22.0°C | 37.9°C | 15.3°C | 106 mm | 70% | 3.3 m/s | 6 |
| 1999 | 33.6°C | 28.1°C | 22.7°C | 37.0°C | 19.9°C | 80 mm | 71% | 3 m/s | 6.2 |
| 1998 | 38.5°C | 31.2°C | 23.9°C | 42.9°C | 16.1°C | 35 mm | 55% | 4 m/s | 7 |
| 1997 | 30.7°C | 25.9°C | 21.2°C | 33.1°C | 14.7°C | 182 mm | 80% | 2.2 m/s | 6.3 |
| 1996 | 34.9°C | 28.5°C | 22.1°C | 41.0°C | 14.6°C | 89 mm | 64% | 2.8 m/s | 6.9 |
| 1995 | 32.4°C | 26.1°C | 19.9°C | 37.4°C | 14.2°C | 79 mm | 69% | 2.6 m/s | 7 |
| 1994 | 35.4°C | 29.0°C | 22.6°C | 40.8°C | 20.0°C | 46 mm | 67% | 2.9 m/s | 6.8 |
| 1993 | 30.9°C | 26.4°C | 21.9°C | 35.8°C | 15.1°C | 137 mm | 80% | 3.2 m/s | 6 |
| 1992 | 30.9°C | 26.2°C | 21.5°C | 33.6°C | 15.8°C | 118 mm | 81% | 2.2 m/s | 6.8 |
| 1991 | 32.2°C | 27.2°C | 22.2°C | 36.0°C | 19.8°C | 122 mm | 76% | 2.4 m/s | 6.4 |
| 1990 | 38.3°C | 31.2°C | 24.1°C | 41.8°C | 21.6°C | 26 mm | 55% | 3.6 m/s | 7.1 |
| 1989 | 33.3°C | 27.2°C | 21.2°C | 37.8°C | 14.2°C | 113 mm | 68% | 3.2 m/s | 6 |
| 1988 | 33.8°C | 27.1°C | 20.4°C | 39.5°C | 15.0°C | 79 mm | 62% | 2.4 m/s | 6.8 |
| 1987 ❄️ | 29.6°C | 25.4°C | 21.2°C | 32.7°C | 17.2°C | 237 mm | 83% | 2.4 m/s | 6 |
| 1986 | 32.0°C | 27.0°C | 21.9°C | 37.8°C | 20.3°C | 108 mm | 75% | 2.2 m/s | 6.4 |
| 1985 | 32.8°C | 26.8°C | 20.9°C | 37.6°C | 15.4°C | 118 mm | 67% | 2.8 m/s | 6.4 |
| 1984 | 35.9°C | 28.9°C | 21.9°C | 40.4°C | 13.8°C | 66 mm | 58% | 3.2 m/s | 6.5 |
| 1983 | 32.2°C | 26.2°C | 20.2°C | 37.2°C | 12.4°C | 88 mm | 71% | 2.4 m/s | — |
| 1982 | 34.3°C | 27.9°C | 21.6°C | 37.0°C | 15.6°C | 85 mm | 67% | 2.7 m/s | — |
| 1981 🌧️ | 30.2°C | 26.2°C | 22.1°C | 34.7°C | 18.3°C | 269 mm | 83% | 2.8 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 34.1°C with lows near 22.3°C (mean 28.2°C), based on 45 years of NASA POWER data.
June averages 90 mm of rainfall in Round Rock, a relatively wet time of year. The wettest on record was 269 mm in 1981.
The hottest June reached 43.4°C in 2012. The coldest dipped to 12.4°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.4°C. Daytime highs moved from 33.1°C to 35.7°C and overnight lows from 21.3°C to 23.4°C over the same span.
June is one of the warmer months of the year in Round Rock and a relatively wet time of year, so plan for around 34.1°C daytime highs and 22.3°C at night.
Not quite — June is the 10th coolest month in Round Rock, averaging 28.2°C.
For June in Round Rock, pack light, breathable clothing and sun protection, with typical highs of 34.1°C and lows of 22.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 68% — moderately humid.
Average wind speed in June is 2.8 m/s. The windiest June on record averaged 4 m/s (1998).
The wettest June on record was 1981 with 269 mm. On average, June sees 90 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 Round Rock 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.
