Weather on April 21
Round Rock, TX
55 Years of Data
About This Date
April 21st in Round Rock, TX typically brings pleasant spring weather, with average highs around 78°F and lows near 56°F. Over 31 years of records, the warmest April 21st was in 2011 (79°F average), while the coldest was 1982 (57°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 39% of April 21st dates historically, with the wettest April 21st recording 4.01" of rain.
Planning for April 21st in Round Rock, TX? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 60° | 55° | 58° | — | — |
| 2025 | 83° | 54° | 68° | 0.17" | — |
| 2024 | 66° | 48° | 57° | 0.5" | — |
| 2023 | 86° | 61° | 73° | 4.01" | — |
| 2022 | 81° | 68° | 74° | — | — |
| 2021 | 82° | 42° | 62° | — | — |
| 2020 | 86° | 62° | 74° | — | — |
| 2019 | 83° | 46° | 64° | — | — |
| 2018 | 71° | 56° | 63° | 0.03" | — |
| 2017 | 84° | 67° | 75° | — | — |
| 2016 | 79° | 58° | 68° | 0.2" | — |
| 2015 | 71° | 48° | 60° | — | — |
| 2014 | 74° | 60° | 67° | — | — |
| 2013 | 73° | 47° | 60° | — | — |
| 2012 | 75° | 51° | 63° | 0.01" | — |
| 2011warmest | 88° | 70° | 79° | — | — |
| 2010 | 77° | 53° | 65° | — | — |
| 2009 | 82° | 54° | 68° | — | — |
| 2008 | 78° | 57° | 68° | — | — |
| 1982coldest | 60° | 54° | 57° | 1.5" | — |
| 1981 | 85° | 63° | 74° | — | — |
| 1980 | 84° | 50° | 67° | — | — |
| 1979 | 68° | 57° | 63° | 0.02" | — |
| 1978 | 82° | 44° | 63° | — | — |
| 1977 | 74° | 59° | 66° | 0.17" | — |
| 1976 | 79° | 47° | 63° | — | — |
| 1975 | 74° | 58° | 66° | — | — |
| 1974 | 84° | 69° | 77° | 0.03" | — |
| 1973 | 82° | 70° | 76° | — | — |
| 1972 | 87° | 65° | 76° | 0.28" | — |
| 1971 | 87° | 44° | 66° | 0.03" | — |
Round Rock, TX Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Round Rock, TX Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Round Rock, TX Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Round Rock, TX
Most pleasant months in Round Rock, TX: February, March, April, October, November.
What to expect on April 21st
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
April 21st outlook →