Round Rock, Texas Weather
Dusk arrives one minute earlier each night. Day 43 of summer. Read this microseason across nine climate regions →
Round Rock weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Overcast——99°71°—
- MondayAug 3Mostly Clear——102°70°+3°
- TuesdayAug 4Partly Cloudy——105°75°+3°
- WednesdayAug 5Overcast——104°78°-1°
- ThursdayAug 6Overcast——103°77°-1°
- FridayAug 7Light Drizzle——96°79°-7°
- SaturdayAug 8Overcast——101°74°+5°
AQI 56 (Moderate), driven by Ozone. AQI flat over the last 6 hours (within ±4 points). Ozone at AQI 42 now. With UV 3.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 19.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 42 now. With UV 3.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 19.
- Present
- AQI 42
- UV peak
- 3.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 19
PM × Wind × Precip
PM2.5 at 7.2 µg/m³, PM10 at 7.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.99
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
Red sky at night, sailor's delight.
- Moonrise
- 10:12 PM
- Moonset
- 10:35 AM
- In sign
- ♓︎ Pisces
Dusk arrives one minute earlier each night
Round Rock at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: February 18 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
ZIP codes: 78664, 78665, 78681
16-Day Forecast — Round Rock
- Sun99°71°6%
- Mon102°70°0%
- Tue105°75°0%
- Wed104°78°1%
- Thu103°77°2%
- Fri96°79°2%
- Sat101°74°4%
- Sun94°72°10%
- Mon97°74°10%
- Tue99°74°6%
- Wed100°76°3%
- Thu101°77°3%
- Fri102°76°3%
- Sat102°77°4%
- Sun102°78°11%
- Mon103°78°13%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Round Rock
Right now in the garden
Peak growing season
As of August 2, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Sun & seasons in Round Rock
Round Rock sits in Williamson County, where the year’s longest day runs 14h 7m of daylight and its shortest just 10h 10m — a swing of +3h 57m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Houston, the state’s largest city, lies about 145 miles to the ESE. The nearest town Round Rock tracks is Austin, roughly 17 miles to the SSW.
ZIP codes in Round Rock
- 78681
- 78664
- 78665
- 78682
- 78683