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Current weather in Round Rock is broken clouds.

Where can I find the hourly weather forecast for Round Rock?

This page shows hourly weather forecast for Round Rock, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Round Rock updated regularly?

Weather data for Round Rock is updated regularly with the latest available observations and forecasts.

Now · 1:25 AM

Round Rock Weather & Hourly Forecast

United States · Arizona · 86547

70°F

Mostly cloudy night

Feels like: 70°F

💧 Humidity 46% 🌡 Pressure 29.94 inHg 💨 Wind 1 mph 👁 Visibility 35.2 mi ☁ Clouds 66% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Round Rock

Today

2:00 AM

Partly cloudy night

69° 💧 None 💨 1 mph H 48%29.94 inHg

5:00 AM

Mostly cloudy night

66° 💧 None 💨 7 mph H 59%29.94 inHg

8:00 AM

Partly cloudy

68° 💧 None 💨 7 mph H 54%30.00 inHg

11:00 AM

Partly cloudy

80° 💧 None 💨 7 mph H 33%29.97 inHg

2:00 PM

Mostly cloudy

88° 💧 0.000 in 💨 9 mph H 20%29.85 inHg

5:00 PM

Partly cloudy

88° 💧 0.001 in 💨 8 mph H 20%29.80 inHg

8:00 PM

Mostly clear night

82° 💧 None 💨 10 mph H 26%29.85 inHg

11:00 PM

Partly cloudy night

75° 💧 None 💨 5 mph H 31%29.91 inHg

Tomorrow

2:00 AM

Mostly cloudy night

72° 💧 None 💨 2 mph H 38%29.94 inHg

5:00 AM

Clear night

67° 💧 None 💨 3 mph H 49%29.97 inHg

8:00 AM

Sunny

67° 💧 None 💨 3 mph H 47%30.03 inHg

11:00 AM

Sunny

81° 💧 None 💨 2 mph H 28%30.00 inHg

2:00 PM

Mostly sunny

90° 💧 0.002 in 💨 4 mph H 20%29.91 inHg

5:00 PM

Light thunderstorms

90° 💧 0.010 in 💨 9 mph H 20%29.85 inHg

8:00 PM

Clear night

84° 💧 None 💨 2 mph H 24%29.88 inHg

11:00 PM

Clear night

77° 💧 None 💨 4 mph H 26%29.97 inHg

Today

2:00 AM

Partly cloudy night

69° 💧 None 💨 1 mph H 48%29.94 inHg

3:00 AM

Mostly clear night

68° 💧 None 💨 4 mph H 51%29.94 inHg

4:00 AM

Mostly cloudy night

66° 💧 None 💨 6 mph H 57%29.94 inHg

5:00 AM

Mostly cloudy night

66° 💧 None 💨 7 mph H 59%29.94 inHg

6:00 AM

Mostly cloudy night

66° 💧 None 💨 7 mph H 59%29.94 inHg

7:00 AM

Mostly cloudy

65° 💧 None 💨 6 mph H 60%29.97 inHg

8:00 AM

Partly cloudy

68° 💧 None 💨 7 mph H 54%30.00 inHg

9:00 AM

Mostly sunny

73° 💧 None 💨 7 mph H 46%30.00 inHg

10:00 AM

Mostly sunny

76° 💧 None 💨 8 mph H 39%29.97 inHg

11:00 AM

Partly cloudy

80° 💧 None 💨 7 mph H 33%29.97 inHg

12:00 PM

Mostly cloudy

83° 💧 None 💨 6 mph H 29%29.94 inHg

1:00 PM

Mostly cloudy

86° 💧 None 💨 7 mph H 24%29.91 inHg

2:00 PM

Mostly cloudy

88° 💧 None 💨 9 mph H 20%29.85 inHg

3:00 PM

Mostly cloudy

90° 💧 None 💨 8 mph H 19%29.83 inHg

4:00 PM

Partly cloudy

89° 💧 0.000 in 💨 8 mph H 20%29.80 inHg

5:00 PM

Partly cloudy

88° 💧 0.001 in 💨 8 mph H 20%29.80 inHg

6:00 PM

Mostly sunny

88° 💧 None 💨 7 mph H 18%29.77 inHg

7:00 PM

Partly cloudy

83° 💧 None 💨 16 mph H 25%29.83 inHg

8:00 PM

Mostly clear night

82° 💧 None 💨 10 mph H 26%29.85 inHg

9:00 PM

Partly cloudy night

80° 💧 None 💨 7 mph H 27%29.88 inHg

10:00 PM

Mostly clear night

78° 💧 None 💨 6 mph H 28%29.91 inHg

11:00 PM

Partly cloudy night

75° 💧 None 💨 5 mph H 31%29.91 inHg

Tomorrow

12:00 AM

Mostly cloudy night

74° 💧 None 💨 3 mph H 33%29.91 inHg

1:00 AM

Mostly cloudy night

73° 💧 None 💨 1 mph H 36%29.94 inHg

2:00 AM

Mostly cloudy night

72° 💧 None 💨 2 mph H 38%29.94 inHg

3:00 AM

Overcast night

70° 💧 None 💨 3 mph H 41%29.94 inHg

4:00 AM

Partly cloudy night

69° 💧 None 💨 3 mph H 44%29.97 inHg

5:00 AM

Clear night

67° 💧 None 💨 3 mph H 49%29.97 inHg

6:00 AM

Clear night

65° 💧 None 💨 3 mph H 52%29.97 inHg

7:00 AM

Sunny

64° 💧 None 💨 2 mph H 53%30.00 inHg

8:00 AM

Sunny

67° 💧 None 💨 3 mph H 47%30.03 inHg

9:00 AM

Sunny

72° 💧 None 💨 3 mph H 40%30.03 inHg

10:00 AM

Sunny

76° 💧 None 💨 3 mph H 33%30.03 inHg

11:00 AM

Sunny

81° 💧 None 💨 2 mph H 28%30.00 inHg

12:00 PM

Sunny

85° 💧 None 💨 1 mph H 24%29.97 inHg

1:00 PM

Sunny

88° 💧 None 💨 3 mph H 22%29.94 inHg

2:00 PM

Mostly sunny

90° 💧 None 💨 4 mph H 20%29.91 inHg

3:00 PM

Mostly sunny

91° 💧 0.000 in 💨 5 mph H 20%29.88 inHg

4:00 PM

Strong thunderstorm

91° 💧 0.002 in 💨 9 mph H 20%29.85 inHg

5:00 PM

Light thunderstorms

90° 💧 0.008 in 💨 9 mph H 20%29.85 inHg

6:00 PM

Mostly sunny

89° 💧 0.001 in 💨 8 mph H 19%29.85 inHg

7:00 PM

Sunny

88° 💧 0.000 in 💨 4 mph H 19%29.85 inHg

8:00 PM

Clear night

84° 💧 None 💨 2 mph H 24%29.88 inHg

9:00 PM

Clear night

82° 💧 None 💨 5 mph H 25%29.91 inHg

10:00 PM

Clear night

80° 💧 None 💨 7 mph H 25%29.94 inHg

11:00 PM

Clear night

77° 💧 None 💨 4 mph H 26%29.97 inHg

Wednesday

12:00 AM

Clear night

75° 💧 None 💨 2 mph H 29%30.00 inHg

1:00 AM

Clear night

72° 💧 None 💨 4 mph H 38%30.00 inHg

2:00 AM

Clear night

69° 💧 None 💨 5 mph H 45%30.03 inHg

3:00 AM

Clear night

68° 💧 None 💨 4 mph H 49%30.06 inHg

4:00 AM

Clear night

67° 💧 None 💨 4 mph H 51%30.06 inHg

5:00 AM

Clear night

66° 💧 None 💨 4 mph H 53%30.06 inHg

6:00 AM

Clear night

64° 💧 None 💨 3 mph H 55%30.06 inHg

7:00 AM

Sunny

64° 💧 None 💨 2 mph H 56%30.09 inHg

8:00 AM

Sunny

67° 💧 None 💨 2 mph H 49%30.12 inHg

9:00 AM

Sunny

72° 💧 None 💨 2 mph H 42%30.12 inHg

10:00 AM

Sunny

77° 💧 None 💨 3 mph H 35%30.12 inHg

11:00 AM

Sunny

82° 💧 None 💨 4 mph H 25%30.09 inHg

12:00 PM

Sunny

86° 💧 None 💨 4 mph H 19%30.06 inHg

1:00 PM

Sunny

90° 💧 None 💨 5 mph H 16%30.03 inHg

2:00 PM

Partly cloudy

92° 💧 None 💨 7 mph H 15%30.00 inHg

3:00 PM

Mostly sunny

93° 💧 None 💨 9 mph H 14%29.97 inHg

4:00 PM

Sunny

93° 💧 None 💨 8 mph H 13%29.91 inHg

5:00 PM

Sunny

93° 💧 None 💨 9 mph H 13%29.88 inHg

6:00 PM

Sunny

91° 💧 None 💨 9 mph H 14%29.88 inHg

9:00 PM

Clear night

82° 💧 None 💨 5 mph H 16%29.94 inHg

Thursday

12:00 AM

Clear night

75° 💧 None 💨 1 mph H 21%30.00 inHg

3:00 AM

Clear night

69° 💧 None 💨 6 mph H 37%30.03 inHg

6:00 AM

Clear night

64° 💧 None 💨 4 mph H 40%30.06 inHg

9:00 AM

Sunny

72° 💧 None 💨 4 mph H 30%30.09 inHg

12:00 PM

Sunny

86° 💧 None 💨 3 mph H 15%30.00 inHg

3:00 PM

Sunny

93° 💧 None 💨 5 mph H 10%29.85 inHg

6:00 PM

Sunny

92° 💧 None 💨 8 mph H 9%29.77 inHg

9:00 PM

Clear night

83° 💧 None 💨 2 mph H 14%29.80 inHg

Friday

12:00 AM

Clear night

76° 💧 None 💨 1 mph H 17%29.83 inHg

3:00 AM

Clear night

72° 💧 None 💨 11 mph H 21%29.85 inHg

6:00 AM

Clear night

69° 💧 None 💨 11 mph H 45%29.88 inHg

9:00 AM

Sunny

75° 💧 None 💨 13 mph H 38%29.88 inHg

12:00 PM

Mostly sunny

87° 💧 None 💨 7 mph H 19%29.83 inHg

3:00 PM

Partly cloudy

90° 💧 None 💨 7 mph H 17%29.71 inHg

6:00 PM

Light rain

88° 💧 None 💨 14 mph H 22%29.68 inHg

9:00 PM

Clear night

77° 💧 None 💨 8 mph H 43%29.77 inHg

Saturday

12:00 AM

Mostly clear night

73° 💧 None 💨 10 mph H 50%29.83 inHg

3:00 AM

Mostly clear night

70° 💧 None 💨 14 mph H 60%29.85 inHg

6:00 AM

Mostly clear night

67° 💧 None 💨 11 mph H 65%29.85 inHg

9:00 AM

Mostly sunny

73° 💧 None 💨 14 mph H 54%29.88 inHg

12:00 PM

Light rain

83° 💧 None 💨 10 mph H 35%29.85 inHg

6:00 PM

Sunny

85° 💧 None 💨 9 mph H 30%29.88 inHg

Sunday

12:00 AM

Mostly cloudy night

87° 💧 None 💨 10 mph H 24%29.74 inHg

6:00 AM

Clear night

74° 💧 None 💨 13 mph H 47%29.85 inHg

12:00 PM

Sunny

68° 💧 None 💨 9 mph H 65%29.88 inHg

6:00 PM

Mostly sunny

82° 💧 None 💨 11 mph H 39%29.85 inHg

Monday

12:00 AM

Partly cloudy night

86° 💧 None 💨 10 mph H 25%29.68 inHg

6:00 AM

Mostly clear night

73° 💧 None 💨 15 mph H 52%29.85 inHg

12:00 PM

Mostly sunny

67° 💧 None 💨 9 mph H 72%29.91 inHg

6:00 PM

Mostly sunny

81° 💧 None 💨 5 mph H 33%29.91 inHg

Tuesday

12:00 AM

Light rain

85° 💧 None 💨 4 mph H 25%29.77 inHg

6:00 AM

Clear night

73° 💧 None 💨 7 mph H 39%29.88 inHg

12:00 PM

Sunny

67° 💧 None 💨 10 mph H 65%29.94 inHg

6:00 PM

Mostly sunny

84° 💧 None 💨 8 mph H 28%29.94 inHg

Wednesday

12:00 AM

Mostly clear night

86° 💧 None 💨 6 mph H 23%29.83 inHg

6:00 AM

Clear night

75° 💧 None 💨 10 mph H 36%29.97 inHg

12:00 PM

Sunny

68° 💧 None 💨 7 mph H 53%30.06 inHg

6:00 PM

Mostly sunny

83° 💧 None 💨 6 mph H 32%30.09 inHg

Thursday

12:00 AM

Clear night

87° 💧 None 💨 4 mph H 25%29.97 inHg

6:00 AM

Clear night

75° 💧 None 💨 10 mph H 47%30.12 inHg

12:00 PM

Overcast

68° 💧 None 💨 5 mph H 64%30.21 inHg

6:00 PM

Partly cloudy

81° 💧 None 💨 1 mph H 40%30.21 inHg

Friday

12:00 AM

Light rain

82° 💧 None 💨 5 mph H 39%30.09 inHg

6:00 AM

Overcast night

69° 💧 None 💨 1 mph H 85%30.27 inHg

12:00 PM

Light rain

67° 💧 None 💨 1 mph H 91%30.27 inHg

6:00 PM

Mostly sunny

80° 💧 None 💨 2 mph H 49%30.24 inHg

Saturday

12:00 AM

Mostly cloudy night

79° 💧 None 💨 11 mph H 50%30.12 inHg

6:00 AM

Mostly cloudy night

69° 💧 None 💨 1 mph H 75%30.21 inHg

12:00 PM

Mostly sunny

64° 💧 None 💨 6 mph H 79%30.21 inHg

6:00 PM

Sunny

79° 💧 None 💨 4 mph H 46%30.15 inHg

Sunday

12:00 AM

Partly cloudy night

83° 💧 None 💨 2 mph H 37%29.94 inHg

6:00 AM

Partly cloudy night

67° 💧 None 💨 5 mph H 76%30.09 inHg

12:00 PM

Mostly cloudy

63° 💧 None 💨 7 mph H 82%30.06 inHg

6:00 PM

Mostly sunny

77° 💧 None 💨 7 mph H 52%30.00 inHg

Monday

12:00 AM

Mostly cloudy night

77° 💧 None 💨 5 mph H 52%29.83 inHg

6:00 AM

Mostly cloudy night

63° 💧 None 💨 9 mph H 85%29.97 inHg

12:00 PM

Mostly sunny

61° 💧 None 💨 7 mph H 84%29.97 inHg

In Round Rock and, more broadly, across the state of Arizona: Tonight will be mostly cloudy, with temperatures remaining quite warm, ranging from 89 to 94 degrees Fahrenheit. A small chance of light rain exists, with an expected accumulation of around 0.01 inches, and the probability of rain reaching about 20%. Winds will be gentle, coming from the west at up to 3 mph, with gusts reaching 4 mph. Overall, it should be a warm evening with minimal chances of rain and light breezes.

15-Day Weather Outlook for Round Rock

TomorrowTomorrow

Strong thunderstorm 91°/64° 💧 None 💨 17 mph

Wednesday, Sep 9Wed Sep 9

Mostly sunny 93°/64° 💧 None 💨 9 mph

Thursday, Sep 10Thu Sep 10

Sunny 93°/64° 💧 None 💨 9 mph

Friday, Sep 11Fri Sep 11

Partly cloudy 92°/69° 💧 0.021 in 💨 13 mph

Saturday, Sep 12Sat Sep 12

Light rain 88°/67° 💧 0.037 in 💨 14 mph

Sunday, Sep 13Sun Sep 13

Mostly cloudy 87°/68° 💧 0.001 in 💨 13 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 86°/67° 💧 0.004 in 💨 15 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 85°/67° 💧 0.004 in 💨 10 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 86°/68° 💧 0.001 in 💨 10 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 87°/68° 💧 0.001 in 💨 10 mph

Friday, Sep 18Fri Sep 18

Light rain 82°/67° 💧 0.218 in 💨 5 mph

Saturday, Sep 19Sat Sep 19

Mostly sunny 80°/64° 💧 0.060 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Partly cloudy 83°/63° 💧 0.207 in 💨 7 mph

Monday, Sep 21Mon Sep 21

Mostly sunny 77°/61° 💧 0.351 in 💨 9 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Round Rock

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Round Rock

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 2:00 AM

PM2.5 Fine particles Good 0,5µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 1,8µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 28,8µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,0µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Round Rock

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 9,8Very high 😊Good

Tomorrow UV 9,9Very high 😊Good

Wednesday UV 9,5Very high 🙂Fair

Thursday UV 9,6Very high 🙂Fair

Friday UV 8,0Very high 🙂Fair

Saturday UV 7,0High —Unavailable

Sunday UV 7,0High —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,3 9:00 AMUV 1,4 10:00 AMUV 3,6 11:00 AMUV 6,2 12:00 PMUV 8,4 1:00 PMUV 9,8 2:00 PMUV 9,7 3:00 PMUV 7,8 4:00 PMUV 5,2 5:00 PMUV 2,5 6:00 PMUV 0,9

Today's weather health advice Open today's recommendations.

Very high UV risk

Use SPF 50+ sunscreen, a hat and sunglasses. Seek shade and limit exposure around midday.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Best in the morning or late in the day

For walking, running or cycling, prefer the early morning or late afternoon.

WIND OUTLOOK

Hourly Wind Forecast for Round Rock

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ROUND ROCK, ARIZONA

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 3:00 AM–4:00 AM.

78/100Best-hour score

BEST TIME TONIGHT 3:00 AM–4:00 AM Astronomical darkness: 9:07 PM–5:25 AM

☁ Cloud cover 30% Real hourly forecast for the best viewing hour.

☾ Moonlight 21% Waning Crescent · Moon about 1° above the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 62° high at the best hour.

✦ Estimated visible meteors 1–3/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min64%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Round Rock were last refreshed today at 1:25 AM. The current forecast period extends through 08/09/2026 at 11:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.