Weather on October 21
Round Rock, TX
55 Years of Data
About This Date
October 21st in Round Rock, TX typically brings warm fall weather, with average highs around 82°F and lows near 54°F — a 28°F daily swing. Over 30 years of records, the warmest October 21st was in 1979 (79°F average), while the coldest was 1976 (49°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 13% of October 21st dates historically.
Planning for October 21st in Round Rock, TX? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 92° | 65° | 78° | — | — |
| 2024 | 83° | 54° | 68° | — | — |
| 2023 | 95° | 55° | 75° | — | — |
| 2022 | 84° | 47° | 65° | — | — |
| 2021 | 82° | 62° | 72° | — | — |
| 2020 | 88° | 71° | 79° | — | — |
| 2019 | 90° | 59° | 74° | 0.4" | — |
| 2018 | 64° | 53° | 59° | — | — |
| 2017 | 80° | 63° | 71° | 0.03" | — |
| 2016 | 79° | 53° | 66° | — | — |
| 2015 | 84° | 54° | 69° | — | — |
| 2014 | 79° | 56° | 67° | — | — |
| 2013 | 72° | 40° | 56° | — | — |
| 2012 | 84° | 55° | 70° | — | — |
| 2011 | 79° | 42° | 60° | — | — |
| 2010 | 87° | 62° | 75° | — | — |
| 2009 | 81° | 54° | 67° | 0.05" | — |
| 2008 | 83° | 54° | 68° | — | — |
| 1982 | 70° | 51° | 60° | — | — |
| 1981 | 80° | 55° | 68° | — | — |
| 1980 | 81° | 46° | 63° | — | — |
| 1979warmest | 94° | 64° | 79° | — | — |
| 1978 | 87° | 47° | 67° | — | — |
| 1977 | 91° | 60° | 76° | — | — |
| 1976coldest | 65° | 34° | 49° | — | — |
| 1975 | 84° | 57° | 71° | — | — |
| 1974 | 78° | 59° | 69° | — | — |
| 1973 | 81° | 47° | 64° | — | — |
| 1972 | 81° | 61° | 71° | 0.12" | — |
| 1971 | 77° | 52° | 64° | — | — |
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 October 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.
October 21st outlook →