Weather on March 18
Round Rock, TX
55 Years of Data
Avg High
77°F
Avg Low
53°F
Warmest
1982
78°F avg
Coldest
1980
47°F avg
About This Date
March 18th in Round Rock, TX typically brings pleasant spring weather, with average highs around 77°F and lows near 53°F. Over 31 years of records, the warmest March 18th was in 1982 (78°F average), while the coldest was 1980 (47°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 19% of March 18th dates historically.
Planning for March 18th in Round Rock, TX? Great weather for outdoor activities.
Cooling Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 67° | 30° | 48° | — | — |
| 2025 | 84° | 42° | 63° | — | — |
| 2024 | 63° | 54° | 58° | — | — |
| 2023 | 58° | 39° | 48° | — | — |
| 2022 | 69° | 48° | 59° | — | — |
| 2021 | 76° | 43° | 59° | — | — |
| 2020 | 81° | 67° | 74° | — | — |
| 2019 | 68° | 43° | 55° | — | — |
| 2018 | 82° | 66° | 74° | 0.38" | — |
| 2017 | 80° | 63° | 71° | — | — |
| 2016 | 77° | 65° | 71° | — | — |
| 2015 | 73° | 54° | 63° | 0.28" | — |
| 2014 | 68° | 40° | 54° | — | — |
| 2013 | 83° | 63° | 73° | — | — |
| 2012 | 79° | 67° | 73° | — | — |
| 2011 | 83° | 64° | 73° | — | — |
| 2010 | 72° | 44° | 58° | — | — |
| 2009 | 84° | 47° | 65° | — | — |
| 2008 | 78° | 65° | 71° | 0.05" | — |
| 1982warmest | 87° | 68° | 78° | — | — |
| 1981 | 72° | 53° | 62° | — | — |
| 1980coldest | 68° | 26° | 47° | — | — |
| 1979 | 78° | 65° | 71° | 0.13" | — |
| 1978 | 80° | 42° | 61° | — | — |
| 1977 | 83° | 56° | 69° | 0.03" | — |
| 1976 | 79° | 47° | 63° | — | — |
| 1975 | 75° | 50° | 63° | 0.18" | — |
| 1974 | 81° | 63° | 72° | — | — |
| 1973 | 76° | 49° | 62° | — | — |
| 1972 | 89° | 59° | 74° | — | — |
| 1971 | 84° | 61° | 72° | — | — |
31 years of data from GEORGETOWN