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Current weather in Williamson is clear sky.

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

Now · 8:46 AM

Williamson Weather & Hourly Forecast

United States · Arizona · 86305

74°F

Sunny

Feels like: 67°F

💧 Humidity 22% 🌡 Pressure 29.91 inHg 💨 Wind 5 mph 👁 Visibility 38.9 mi ☁ Clouds 0% ☀️ UV index 0.9 · Low 🌅 Sunrise 6:17 AM 🌇 Sunset 6:28 PM

Hourly Forecast for Williamson

Today

9:00 AM

Sunny

74° 💧 None 💨 5 mph H 22%29.91 inHg

12:00 PM

Sunny

84° 💧 None 💨 9 mph H 14%29.85 inHg

3:00 PM

Mostly sunny

84° 💧 None 💨 12 mph H 16%29.80 inHg

6:00 PM

Mostly sunny

78° 💧 None 💨 9 mph H 20%29.80 inHg

9:00 PM

Partly cloudy night

69° 💧 None 💨 6 mph H 28%29.88 inHg

Tomorrow

12:00 AM

Overcast night

63° 💧 None 💨 3 mph H 36%29.88 inHg

3:00 AM

Overcast night

63° 💧 None 💨 1 mph H 40%29.91 inHg

6:00 AM

Overcast night

61° 💧 None 💨 0 mph H 46%29.94 inHg

9:00 AM

Overcast

70° 💧 None 💨 3 mph H 38%30.00 inHg

12:00 PM

Overcast

79° 💧 None 💨 4 mph H 33%29.94 inHg

3:00 PM

Overcast

80° 💧 None 💨 1 mph H 25%29.88 inHg

6:00 PM

Overcast

72° 💧 None 💨 10 mph H 42%29.94 inHg

9:00 PM

Overcast night

68° 💧 None 💨 4 mph H 51%29.97 inHg

Thursday

12:00 AM

Mostly cloudy night

66° 💧 None 💨 5 mph H 53%29.97 inHg

3:00 AM

Overcast night

64° 💧 None 💨 1 mph H 57%29.97 inHg

6:00 AM

Partly cloudy night

62° 💧 None 💨 1 mph H 61%29.97 inHg

Today

9:00 AM

Sunny

74° 💧 None 💨 5 mph H 22%29.91 inHg

10:00 AM

Sunny

78° 💧 None 💨 6 mph H 16%29.91 inHg

11:00 AM

Sunny

81° 💧 None 💨 6 mph H 14%29.88 inHg

12:00 PM

Sunny

84° 💧 None 💨 9 mph H 14%29.85 inHg

1:00 PM

Sunny

85° 💧 None 💨 11 mph H 14%29.83 inHg

2:00 PM

Sunny

85° 💧 None 💨 12 mph H 15%29.80 inHg

3:00 PM

Mostly sunny

84° 💧 None 💨 12 mph H 16%29.80 inHg

4:00 PM

Mostly sunny

83° 💧 None 💨 12 mph H 16%29.77 inHg

5:00 PM

Partly cloudy

81° 💧 None 💨 11 mph H 18%29.80 inHg

6:00 PM

Mostly sunny

78° 💧 None 💨 9 mph H 20%29.80 inHg

7:00 PM

Clear night

74° 💧 None 💨 6 mph H 23%29.83 inHg

8:00 PM

Mostly clear night

72° 💧 None 💨 5 mph H 26%29.85 inHg

9:00 PM

Partly cloudy night

69° 💧 None 💨 6 mph H 28%29.88 inHg

10:00 PM

Partly cloudy night

67° 💧 None 💨 6 mph H 31%29.88 inHg

11:00 PM

Mostly cloudy night

65° 💧 None 💨 4 mph H 33%29.88 inHg

Tomorrow

12:00 AM

Overcast night

63° 💧 None 💨 3 mph H 36%29.88 inHg

1:00 AM

Overcast night

62° 💧 None 💨 1 mph H 38%29.91 inHg

2:00 AM

Overcast night

63° 💧 None 💨 2 mph H 38%29.91 inHg

3:00 AM

Overcast night

63° 💧 None 💨 1 mph H 40%29.91 inHg

4:00 AM

Overcast night

62° 💧 None 💨 1 mph H 41%29.91 inHg

5:00 AM

Overcast night

61° 💧 None 💨 1 mph H 43%29.94 inHg

6:00 AM

Overcast night

61° 💧 None 💨 0 mph H 46%29.94 inHg

7:00 AM

Overcast

62° 💧 None 💨 0 mph H 49%29.97 inHg

8:00 AM

Overcast

65° 💧 None 💨 1 mph H 40%30.00 inHg

9:00 AM

Overcast

70° 💧 None 💨 3 mph H 38%30.00 inHg

10:00 AM

Overcast

74° 💧 None 💨 4 mph H 39%29.97 inHg

11:00 AM

Overcast

77° 💧 None 💨 4 mph H 38%29.97 inHg

12:00 PM

Overcast

79° 💧 None 💨 4 mph H 33%29.94 inHg

1:00 PM

Overcast

80° 💧 None 💨 4 mph H 29%29.91 inHg

2:00 PM

Overcast

80° 💧 None 💨 3 mph H 27%29.88 inHg

3:00 PM

Overcast

80° 💧 None 💨 1 mph H 25%29.88 inHg

4:00 PM

Overcast

80° 💧 None 💨 4 mph H 23%29.85 inHg

5:00 PM

Overcast

79° 💧 None 💨 5 mph H 24%29.88 inHg

6:00 PM

Overcast

72° 💧 None 💨 10 mph H 42%29.94 inHg

7:00 PM

Overcast night

69° 💧 None 💨 7 mph H 50%29.94 inHg

8:00 PM

Overcast night

69° 💧 None 💨 2 mph H 49%29.94 inHg

9:00 PM

Overcast night

68° 💧 None 💨 4 mph H 51%29.97 inHg

10:00 PM

Mostly cloudy night

68° 💧 None 💨 6 mph H 53%29.97 inHg

11:00 PM

Mostly cloudy night

66° 💧 None 💨 5 mph H 54%29.97 inHg

Thursday

12:00 AM

Mostly cloudy night

66° 💧 None 💨 5 mph H 53%29.97 inHg

1:00 AM

Overcast night

65° 💧 None 💨 4 mph H 53%29.97 inHg

2:00 AM

Overcast night

64° 💧 None 💨 3 mph H 55%29.97 inHg

3:00 AM

Overcast night

64° 💧 None 💨 1 mph H 57%29.97 inHg

4:00 AM

Overcast night

63° 💧 None 💨 1 mph H 59%29.97 inHg

5:00 AM

Overcast night

62° 💧 None 💨 0 mph H 61%29.97 inHg

6:00 AM

Partly cloudy night

62° 💧 None 💨 1 mph H 61%29.97 inHg

7:00 AM

Mostly cloudy

63° 💧 None 💨 2 mph H 58%30.00 inHg

8:00 AM

Overcast

69° 💧 None 💨 1 mph H 47%30.00 inHg

9:00 AM

Mostly cloudy

72° 💧 None 💨 2 mph H 42%30.00 inHg

10:00 AM

Mostly sunny

76° 💧 None 💨 4 mph H 36%30.00 inHg

11:00 AM

Strong thunderstorm

77° 💧 0.001 in 💨 6 mph H 33%29.97 inHg

12:00 PM

Light thunderstorms

77° 💧 0.003 in 💨 8 mph H 34%29.97 inHg

1:00 PM

Light thunderstorms

76° 💧 0.011 in 💨 12 mph H 35%29.97 inHg

2:00 PM

Light thunderstorms

73° 💧 0.004 in 💨 14 mph H 42%30.00 inHg

3:00 PM

Mostly cloudy

73° 💧 0.002 in 💨 8 mph H 35%29.97 inHg

4:00 PM

Mostly cloudy

75° 💧 None 💨 5 mph H 32%29.94 inHg

5:00 PM

Mostly cloudy

75° 💧 None 💨 3 mph H 32%29.94 inHg

Friday

2:00 AM

Partly cloudy night

61° 💧 None 💨 4 mph H 69%30.00 inHg

5:00 AM

Clear night

58° 💧 None 💨 1 mph H 80%30.00 inHg

8:00 AM

Sunny

62° 💧 None 💨 1 mph H 70%30.06 inHg

11:00 AM

Sunny

76° 💧 None 💨 2 mph H 35%30.00 inHg

2:00 PM

Sunny

83° 💧 None 💨 3 mph H 25%29.91 inHg

5:00 PM

Mostly sunny

82° 💧 None 💨 2 mph H 25%29.85 inHg

8:00 PM

Mostly clear night

75° 💧 None 💨 6 mph H 33%29.91 inHg

11:00 PM

Clear night

69° 💧 None 💨 5 mph H 47%29.94 inHg

Saturday

2:00 AM

Clear night

64° 💧 None 💨 1 mph H 56%29.97 inHg

5:00 AM

Mostly clear night

60° 💧 None 💨 1 mph H 63%29.97 inHg

8:00 AM

Mostly sunny

65° 💧 None 💨 0 mph H 52%30.03 inHg

11:00 AM

Mostly sunny

82° 💧 None 💨 2 mph H 25%29.97 inHg

2:00 PM

Mostly cloudy

86° 💧 None 💨 10 mph H 15%29.88 inHg

5:00 PM

Partly cloudy

84° 💧 None 💨 10 mph H 14%29.85 inHg

8:00 PM

Partly cloudy night

75° 💧 None 💨 9 mph H 22%29.91 inHg

11:00 PM

Partly cloudy night

69° 💧 None 💨 6 mph H 26%29.97 inHg

Sunday

2:00 AM

Mostly clear night

65° 💧 None 💨 3 mph H 35%29.97 inHg

5:00 AM

Mostly cloudy night

61° 💧 None 💨 1 mph H 40%29.97 inHg

8:00 AM

Mostly sunny

66° 💧 None 💨 1 mph H 35%30.00 inHg

11:00 AM

Mostly sunny

85° 💧 None 💨 9 mph H 17%29.94 inHg

2:00 PM

Mostly sunny

86° 💧 None 💨 14 mph H 17%29.85 inHg

5:00 PM

Mostly sunny

83° 💧 None 💨 13 mph H 21%29.83 inHg

8:00 PM

Overcast night

76° 💧 None 💨 8 mph H 31%29.85 inHg

11:00 PM

Overcast night

73° 💧 None 💨 11 mph H 39%29.88 inHg

Monday

5:00 AM

Overcast night

66° 💧 None 💨 5 mph H 65%29.97 inHg

11:00 AM

Partly cloudy

61° 💧 None 💨 3 mph H 67%29.88 inHg

5:00 PM

Mostly sunny

76° 💧 None 💨 15 mph H 40%29.85 inHg

11:00 PM

Clear night

77° 💧 None 💨 16 mph H 19%29.71 inHg

Tuesday

5:00 AM

Clear night

58° 💧 None 💨 3 mph H 35%29.83 inHg

11:00 AM

Sunny

52° 💧 None 💨 1 mph H 45%29.85 inHg

5:00 PM

Sunny

74° 💧 None 💨 7 mph H 21%29.88 inHg

11:00 PM

Clear night

82° 💧 None 💨 5 mph H 11%29.74 inHg

Wednesday

5:00 AM

Clear night

61° 💧 None 💨 2 mph H 30%29.85 inHg

11:00 AM

Sunny

55° 💧 None 💨 1 mph H 36%29.88 inHg

5:00 PM

Sunny

78° 💧 None 💨 4 mph H 14%29.88 inHg

11:00 PM

Clear night

84° 💧 None 💨 8 mph H 7%29.74 inHg

Thursday

5:00 AM

Clear night

65° 💧 None 💨 6 mph H 22%29.83 inHg

11:00 AM

Sunny

57° 💧 None 💨 1 mph H 37%29.83 inHg

5:00 PM

Sunny

84° 💧 None 💨 7 mph H 20%29.80 inHg

11:00 PM

Clear night

82° 💧 None 💨 15 mph H 23%29.71 inHg

Friday

5:00 AM

Clear night

71° 💧 None 💨 8 mph H 48%29.77 inHg

11:00 AM

Sunny

61° 💧 None 💨 5 mph H 65%29.77 inHg

5:00 PM

Sunny

81° 💧 None 💨 16 mph H 27%29.77 inHg

11:00 PM

Clear night

79° 💧 None 💨 13 mph H 23%29.68 inHg

Saturday

5:00 AM

Clear night

60° 💧 None 💨 2 mph H 27%29.77 inHg

11:00 AM

Sunny

52° 💧 None 💨 1 mph H 32%29.80 inHg

5:00 PM

Sunny

72° 💧 None 💨 2 mph H 16%29.85 inHg

11:00 PM

Clear night

79° 💧 None 💨 7 mph H 9%29.74 inHg

Sunday

5:00 AM

Clear night

64° 💧 None 💨 2 mph H 25%29.88 inHg

11:00 AM

Sunny

55° 💧 None 💨 1 mph H 38%29.97 inHg

5:00 PM

Sunny

74° 💧 None 💨 4 mph H 25%29.97 inHg

11:00 PM

Clear night

80° 💧 None 💨 8 mph H 12%29.85 inHg

Monday

5:00 AM

Clear night

64° 💧 None 💨 3 mph H 40%30.00 inHg

11:00 AM

Sunny

54° 💧 None 💨 2 mph H 55%30.06 inHg

5:00 PM

Sunny

75° 💧 None 💨 5 mph H 25%30.03 inHg

11:00 PM

Clear night

82° 💧 None 💨 3 mph H 16%29.88 inHg

Tuesday

5:00 AM

Clear night

66° 💧 None 💨 4 mph H 33%30.03 inHg

11:00 AM

Sunny

56° 💧 None 💨 1 mph H 51%30.06 inHg

5:00 PM

Sunny

79° 💧 None 💨 5 mph H 25%30.06 inHg

11:00 PM

Clear night

86° 💧 None 💨 9 mph H 12%29.88 inHg

In Williamson and, more broadly, across the state of Arizona: The evening will be characterized by mostly cloudy skies, with temperatures staying warm between 82 and 88 degrees Fahrenheit. Light northeast winds will prevail, generally blowing around 3 mph, with occasional gusts reaching up to 7 mph. No precipitation is expected during the next few hours, so dry conditions will continue through the night. Temperatures are expected to remain steady, providing a warm and calm evening. Overall, it should be a mild night with comfortable conditions, although the cloud cover may limit any significant cooling.

15-Day Weather Outlook for Williamson

TomorrowTomorrow

Overcast 80°/61° 💧 None 💨 10 mph

Thursday, Sep 24Thu Sep 24

Strong thunderstorm 77°/62° 💧 None 💨 14 mph

Friday, Sep 25Fri Sep 25

Partly cloudy 83°/58° 💧 0.014 in 💨 6 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 86°/60° 💧 None 💨 10 mph

Sunday, Sep 27Sun Sep 27

Mostly sunny 86°/61° 💧 0.001 in 💨 14 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 77°/61° 💧 0.093 in 💨 16 mph

Tuesday, Sep 29Tue Sep 29

Sunny 82°/52° 💧 None 💨 7 mph

Wednesday, Sep 30Wed Sep 30

Sunny 84°/55° 💧 None 💨 8 mph

Thursday, Oct 1Thu Oct 1

Sunny 84°/57° 💧 None 💨 15 mph

Friday, Oct 2Fri Oct 2

Sunny 81°/61° 💧 None 💨 16 mph

Saturday, Oct 3Sat Oct 3

Sunny 79°/52° 💧 None 💨 7 mph

Sunday, Oct 4Sun Oct 4

Sunny 80°/55° 💧 None 💨 8 mph

Monday, Oct 5Mon Oct 5

Sunny 82°/54° 💧 None 💨 5 mph

Tuesday, Oct 6Tue Oct 6

Sunny 86°/56° 💧 None 💨 9 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Williamson

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Williamson

Hourly forecast · Updated every 2 hours

Moderate

Nearest forecast value 9:00 AM

PM2.5 Fine particles Good 8,4µg/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 Moderate 54,6µg/m³

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

O₃ Ozone Fair 64,3µg/m³

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

NO₂ Nitrogen dioxide Good 2,3µg/m³

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

Sensitive people should reduce strenuous and prolonged outdoor exertion.

UV & HEALTH

UV, Sun & Health Outlook in Williamson

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 8,2Very high 😐Moderate

Tomorrow UV 7,8High 🙂Fair

Thursday UV 7,6High 🙂Fair

Friday UV 8,1Very high 😐Moderate

Saturday UV 7,0High 🙂Fair

Sunday UV 6,0High —Unavailable

Monday UV 7,0High —Unavailable

Hourly UV index today

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

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.

Caution for sensitive people

People with respiratory or cardiovascular conditions should reduce prolonged outdoor exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed. Dry air can increase hydration needs.

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 Williamson

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · WILLIAMSON, ARIZONA

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 8:00 PM–9:00 PM.

73/100Best-hour score

BEST TIME TONIGHT 8:00 PM–9:00 PM Astronomical darkness: 7:51 PM–4:55 AM

☁ Cloud cover 26% Real hourly forecast for the best viewing hour.

☾ Moonlight 87% Waxing Gibbous · Moon about 33° above the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant -13° high at the best hour.

✦ Estimated visible meteors 0–1/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min5%

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

SEP 20–NOV 20

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

ACTIVE NOW

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

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% 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 Williamson were last refreshed today at 8:46 AM. The current forecast period extends through 24/09/2026 at 6:00 AM. 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.