April is close to Round Rock's year-round average, with average highs near 27.3°C and lows around 13.6°C (mean 20.5°C). It is about average for rainfall, averaging 63 mm of rainfall and 68% relative humidity across the period.
April is close to Round Rock's year-round average. Across 45 years of records, the warmest April in Round Rock was 2011 — when the month averaged 24.6°C — while the coldest was 1997 at 17°C. Typical April days reach 27.3°C with nights near 13.6°C. The long-term trend is warming, about 0.3°C per decade.
April is about average for rainfall in Round Rock, averaging 63 mm of rainfall. The wettest April on record was 2016 with 170 mm, while the driest was 1983 at 4 mm.
Relative humidity in Round Rock during April averages 68%. The most humid April was 1992 at 81%, and the least humid was 1984 at 45%.
April receives about 5.4 kWh/m²/day of solar energy in Round Rock. The sunniest April was 1998 at 6.6 kWh/m²/day, and the cloudiest was 2004 at 4.6.
Average wind speed in Round Rock during April is 3.2 m/s. The windiest April was 2011 at 4.3 m/s, while the calmest was 1992 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.3°C | 19.6°C | 20.5°C | 20.7°C | 21.6°C | +1.3°C |
| Avg High | 27.6°C | 26.5°C | 27.0°C | 27.5°C | 28.5°C | +0.9°C |
| Avg Low | 13.0°C | 12.8°C | 14.0°C | 14.0°C | 14.8°C | +1.8°C |
| Avg Rain | 42 mm | 78 mm | 62 mm | 63 mm | 73 mm | +31 mm |
April temperatures in Round Rock have risen by about 1.7°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -0.2°C (1987) to a record high of 39.5°C (1984).
Rainfall in April is about average for rainfall, averaging 63 mm, with a wettest year of 170 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit Round Rock
April is one of the best times to visit Round Rock. Expect days averaging 27.3°C and nights around 13.6°C (mean 20.5°C) — close to Round Rock's yearly average — with moderate rainfall (63 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 30.7°C | 23.7°C | 16.7°C | 35.2°C | 3.7°C | 43 mm | 64% | 3.4 m/s | 5.4 |
| 2024 | 28.7°C | 22.4°C | 16.1°C | 31.4°C | 8.3°C | 84 mm | 71% | 3.3 m/s | 4.9 |
| 2023 | 26.5°C | 20.1°C | 13.8°C | 35.7°C | 9.9°C | 113 mm | 69% | 3.2 m/s | 4.8 |
| 2022 | 30.9°C | 23.3°C | 15.7°C | 35.6°C | 6.6°C | 27 mm | 60% | 3.8 m/s | 5.3 |
| 2021 | 27.7°C | 20.6°C | 13.4°C | 34.8°C | 5.8°C | 69 mm | 64% | 3.3 m/s | 4.9 |
| 2020 | 26.4°C | 19.7°C | 12.9°C | 34.9°C | 4.5°C | 99 mm | 73% | 2.9 m/s | 5.3 |
| 2019 | 26.0°C | 19.7°C | 13.3°C | 31.5°C | 3.1°C | 136 mm | 74% | 3.3 m/s | 5.6 |
| 2018 | 26.8°C | 19.1°C | 11.4°C | 32.0°C | 3.8°C | 21 mm | 63% | 3.3 m/s | 5.8 |
| 2017 | 27.8°C | 21.2°C | 14.6°C | 34.3°C | 8.8°C | 74 mm | 71% | 3.2 m/s | 5.5 |
| 2016 🌧️ | 26.5°C | 20.4°C | 14.3°C | 32.0°C | 5.6°C | 170 mm | 73% | 2.7 m/s | 5.3 |
| 2015 | 26.3°C | 21.1°C | 15.8°C | 31.6°C | 8.4°C | 82 mm | 78% | 2.7 m/s | 4.8 |
| 2014 | 27.2°C | 20.1°C | 13.0°C | 36.6°C | 2.3°C | 29 mm | 63% | 3.3 m/s | 5.6 |
| 2013 | 27.0°C | 19.6°C | 12.2°C | 33.7°C | 4.0°C | 63 mm | 68% | 3.3 m/s | 5.1 |
| 2012 | 29.0°C | 22.1°C | 15.2°C | 35.8°C | 9.5°C | 6 mm | 69% | 3.2 m/s | 6 |
| 2011 🔥 | 32.7°C | 24.6°C | 16.6°C | 37.3°C | 6.4°C | 8 mm | 54% | 4.3 m/s | 6.2 |
| 2010 | 25.4°C | 19.2°C | 13.1°C | 30.4°C | 5.6°C | 44 mm | 75% | 3.2 m/s | 5.2 |
| 2009 | 26.2°C | 19.6°C | 13.1°C | 34.9°C | 1.4°C | 112 mm | 64% | 3.7 m/s | 5.6 |
| 2008 | 27.9°C | 20.5°C | 13.1°C | 33.6°C | 4.4°C | 67 mm | 65% | 3.5 m/s | 5.8 |
| 2007 | 23.1°C | 17.4°C | 11.7°C | 28.3°C | 0.9°C | 61 mm | 77% | 2.8 m/s | 5 |
| 2006 | 30.3°C | 23.2°C | 16.2°C | 38.0°C | 9.5°C | 80 mm | 67% | 3.2 m/s | 6 |
| 2005 | 25.5°C | 18.9°C | 12.3°C | 32.9°C | 4.4°C | 20 mm | 69% | 3.2 m/s | 6 |
| 2004 | 25.2°C | 19.5°C | 13.8°C | 30.8°C | 5.9°C | 129 mm | 76% | 3.2 m/s | 4.6 |
| 2003 | 27.4°C | 20.6°C | 13.8°C | 34.0°C | 2.7°C | 7 mm | 69% | 3.3 m/s | 5.7 |
| 2002 | 29.9°C | 23.4°C | 17.0°C | 38.4°C | 8.2°C | 33 mm | 71% | 3.4 m/s | 5.1 |
| 2001 | 26.4°C | 20.9°C | 15.5°C | 31.0°C | 7.7°C | 28 mm | 78% | 3.4 m/s | 4.8 |
| 2000 | 28.4°C | 21.0°C | 13.7°C | 36.7°C | 4.2°C | 78 mm | 65% | 3.2 m/s | 5.6 |
| 1999 | 29.7°C | 22.5°C | 15.3°C | 36.3°C | 5.8°C | 36 mm | 65% | 3.5 m/s | 5.5 |
| 1998 | 26.6°C | 18.9°C | 11.3°C | 31.7°C | 6.8°C | 25 mm | 65% | 3.1 m/s | 6.6 |
| 1997 ❄️ | 23.3°C | 17.0°C | 10.8°C | 32.3°C | 1.5°C | 144 mm | 76% | 3.2 m/s | 5 |
| 1996 | 29.4°C | 20.6°C | 11.9°C | 38.3°C | 2.3°C | 75 mm | 54% | 3.7 m/s | 6.1 |
| 1995 | 26.5°C | 19.3°C | 12.2°C | 33.7°C | 5.9°C | 85 mm | 72% | 3.3 m/s | 5.6 |
| 1994 | 27.7°C | 20.7°C | 13.7°C | 35.8°C | 2.9°C | 60 mm | 68% | 3.4 m/s | 5.4 |
| 1993 | 24.4°C | 17.7°C | 11.0°C | 29.7°C | 4.3°C | 95 mm | 75% | 3.4 m/s | 5.3 |
| 1992 | 24.3°C | 18.5°C | 12.8°C | 28.4°C | 2.7°C | 51 mm | 81% | 2.5 m/s | 5.3 |
| 1991 | 26.4°C | 20.6°C | 14.8°C | 31.0°C | 5.3°C | 108 mm | 78% | 2.7 m/s | 5 |
| 1990 | 26.6°C | 20.2°C | 13.8°C | 33.3°C | 4.2°C | 102 mm | 73% | 3.4 m/s | 4.7 |
| 1989 | 27.5°C | 20.3°C | 13.1°C | 34.1°C | 2.9°C | 41 mm | 69% | 3 m/s | 5.6 |
| 1988 | 28.7°C | 20.4°C | 12.0°C | 36.8°C | 3.9°C | 37 mm | 57% | 3 m/s | 5.7 |
| 1987 | 26.2°C | 18.3°C | 10.4°C | 33.0°C | -0.2°C | 19 mm | 63% | 2.6 m/s | 6.5 |
| 1986 | 29.1°C | 22.2°C | 15.3°C | 34.0°C | 9.3°C | 47 mm | 66% | 3.3 m/s | 4.9 |
| 1985 | 26.0°C | 20.0°C | 13.9°C | 30.5°C | 5.6°C | 71 mm | 76% | 3 m/s | 5.2 |
| 1984 | 30.4°C | 21.8°C | 13.1°C | 39.5°C | 4.4°C | 8 mm | 45% | 3.6 m/s | 6 |
| 1983 | 25.7°C | 18.1°C | 10.4°C | 35.2°C | 2.7°C | 4 mm | 64% | 3.8 m/s | — |
| 1982 | 26.7°C | 19.5°C | 12.4°C | 36.3°C | 4.5°C | 93 mm | 67% | 3.2 m/s | — |
| 1981 | 28.3°C | 22.2°C | 16.2°C | 34.3°C | 7.3°C | 58 mm | 71% | 3 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 27.3°C with lows near 13.6°C (mean 20.5°C), based on 45 years of NASA POWER data.
April averages 63 mm of rainfall in Round Rock, about average for rainfall. The wettest on record was 170 mm in 2016.
The hottest April reached 39.5°C in 1984. The coldest dipped to -0.2°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.7°C. Daytime highs moved from 27.4°C to 28.9°C and overnight lows from 13.2°C to 15.1°C over the same span.
April is close to Round Rock's year-round average and about average for rainfall, so plan for around 27.3°C daytime highs and 13.6°C at night.
Not quite — April is the 6th coolest month in Round Rock, averaging 20.5°C.
For April in Round Rock, pack light layers you can adjust through the day, with typical highs of 27.3°C and lows of 13.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 68% — moderately humid.
Average wind speed in April is 3.2 m/s. The windiest April on record averaged 4.3 m/s (2011).
The wettest April on record was 2016 with 170 mm. On average, April sees 63 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 April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
