Weather on May 18
Round Rock, TX
55 Years of Data
Avg High
87°F
Avg Low
64°F
Warmest
2025
86°F avg
Coldest
1976
62°F avg
About This Date
May 18th in Round Rock, TX typically brings warm spring weather, with average highs around 87°F and lows near 64°F. Over 30 years of records, the warmest May 18th was in 2025 (86°F average), while the coldest was 1976 (62°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 17% of May 18th dates historically, with the wettest May 18th recording 2.74" of rain.
Planning for May 18th in Round Rock, TX? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 97° | 75° | 86° | — | — |
| 2024 | 83° | 61° | 72° | — | — |
| 2023 | 87° | 63° | 75° | — | — |
| 2022 | 96° | 69° | 83° | — | — |
| 2021 | 78° | 64° | 71° | 0.41" | — |
| 2020 | 87° | 62° | 75° | — | — |
| 2019 | 87° | 71° | 79° | — | — |
| 2018 | 96° | 67° | 81° | — | — |
| 2017 | 88° | 68° | 78° | 0.23" | — |
| 2016 | 82° | 60° | 71° | 0.91" | — |
| 2015 | 81° | 66° | 73° | 1.42" | — |
| 2014 | 85° | 59° | 72° | — | — |
| 2013 | 92° | 70° | 81° | — | — |
| 2012 | 89° | 59° | 74° | — | — |
| 2011 | 88° | 55° | 71° | — | — |
| 2010 | 92° | 63° | 77° | 2.74" | — |
| 2009 | 75° | 53° | 64° | — | — |
| 2008 | 82° | 57° | 70° | — | — |
| 1982 | 88° | 67° | 77° | — | — |
| 1981 | 94° | 72° | 83° | — | — |
| 1980 | 88° | 63° | 75° | — | — |
| 1979 | 87° | 60° | 74° | — | — |
| 1978 | 92° | 69° | 80° | — | — |
| 1977 | 78° | 67° | 72° | — | — |
| 1976coldest | 75° | 49° | 62° | — | — |
| 1975 | 89° | 65° | 77° | — | — |
| 1974 | 91° | 73° | 82° | — | — |
| 1973 | 92° | 55° | 73° | — | — |
| 1972 | 87° | 60° | 74° | — | — |
| 1971 | 91° | 68° | 80° | — | — |
30 years of data from GEORGETOWN