Weather on May 15
Round Rock, TX
55 Years of Data
About This Date
May 15th in Round Rock, TX typically brings warm spring weather, with average highs around 85°F and lows near 62°F. Over 31 years of records, the warmest May 15th was in 2025 (84°F average), while the coldest was 2014 (58°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 26% of May 15th dates historically, with the wettest May 15th recording 3.81" of rain.
Planning for May 15th in Round Rock, TX? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 90° | 62° | 76° | — | — |
| 2025warmest | 98° | 70° | 84° | — | — |
| 2024 | 90° | 59° | 74° | — | — |
| 2023 | 81° | 63° | 72° | 0.53" | — |
| 2022 | 94° | 69° | 81° | — | — |
| 2021 | 83° | 58° | 70° | — | — |
| 2020 | 90° | 71° | 80° | — | — |
| 2019 | 80° | 60° | 70° | — | — |
| 2018 | 90° | 70° | 80° | — | — |
| 2017 | 90° | 59° | 74° | — | — |
| 2016 | 79° | 58° | 68° | 1.42" | — |
| 2015 | 82° | 69° | 76° | 0.1" | — |
| 2014coldest | 72° | 44° | 58° | — | — |
| 2013 | 85° | 61° | 73° | 0.99" | — |
| 2012 | 84° | 62° | 73° | 1.45" | — |
| 2011 | 79° | 53° | 66° | — | — |
| 2010 | 75° | 62° | 69° | 3.81" | — |
| 2009 | 89° | 71° | 80° | — | — |
| 2008 | 87° | 64° | 76° | 0.53" | — |
| 1982 | 82° | 65° | 73° | — | — |
| 1981 | 82° | 55° | 69° | — | — |
| 1980 | 81° | 67° | 74° | 0.18" | — |
| 1979 | 86° | 59° | 73° | — | — |
| 1978 | 95° | 60° | 78° | — | — |
| 1977 | 84° | 70° | 77° | — | — |
| 1976 | 82° | 50° | 66° | — | — |
| 1975 | 80° | 58° | 69° | — | — |
| 1974 | 91° | 74° | 82° | — | — |
| 1973 | 77° | 54° | 65° | — | — |
| 1972 | 85° | 60° | 72° | — | — |
| 1971 | 90° | 50° | 70° | — | — |
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
Round Rock, TX has no months that meet our "pleasant" threshold — every season has tradeoffs.