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Current weather in Williamstown is clear sky.

Where can I find the hourly weather forecast for Williamstown?

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

Is the weather forecast for Williamstown updated regularly?

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

Now · 8:10 PM

Williamstown Weather & Hourly Forecast

United States · Missouri · 63473

85°F

Clear night

Feels like: 91°F

💧 Humidity 68% 🌡 Pressure 29.88 inHg 💨 Wind 7 mph 👁 Visibility 20.9 mi ☁ Clouds 5% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Williamstown

Today

9:00 PM

Clear night

83° 💧 None 💨 6 mph H 74%29.91 inHg

Tomorrow

12:00 AM

Clear night

80° 💧 None 💨 9 mph H 85%29.94 inHg

3:00 AM

Partly cloudy night

76° 💧 None 💨 7 mph H 90%29.97 inHg

6:00 AM

Mostly clear night

73° 💧 None 💨 7 mph H 90%30.00 inHg

9:00 AM

Overcast

76° 💧 0.022 in 💨 6 mph H 82%30.03 inHg

12:00 PM

Mostly cloudy

82° 💧 0.000 in 💨 5 mph H 68%30.00 inHg

3:00 PM

Overcast

86° 💧 None 💨 7 mph H 56%29.97 inHg

6:00 PM

Mostly sunny

85° 💧 None 💨 7 mph H 57%29.94 inHg

9:00 PM

Mostly cloudy night

79° 💧 None 💨 9 mph H 67%29.97 inHg

Monday

12:00 AM

Mostly cloudy night

75° 💧 None 💨 8 mph H 73%30.03 inHg

3:00 AM

Overcast night

72° 💧 None 💨 8 mph H 75%30.03 inHg

6:00 AM

Mostly cloudy night

70° 💧 None 💨 7 mph H 69%30.06 inHg

9:00 AM

Overcast

71° 💧 None 💨 8 mph H 67%30.12 inHg

12:00 PM

Sunny

81° 💧 None 💨 8 mph H 51%30.09 inHg

3:00 PM

Mostly sunny

86° 💧 None 💨 9 mph H 37%30.03 inHg

6:00 PM

Mostly cloudy

84° 💧 None 💨 10 mph H 40%30.00 inHg

Today

9:00 PM

Clear night

83° 💧 None 💨 6 mph H 74%29.91 inHg

10:00 PM

Mostly clear night

82° 💧 None 💨 5 mph H 79%29.94 inHg

11:00 PM

Clear night

81° 💧 None 💨 7 mph H 82%29.94 inHg

Tomorrow

12:00 AM

Clear night

80° 💧 None 💨 9 mph H 85%29.94 inHg

1:00 AM

Clear night

79° 💧 None 💨 8 mph H 88%29.97 inHg

2:00 AM

Clear night

78° 💧 None 💨 8 mph H 89%29.97 inHg

3:00 AM

Partly cloudy night

76° 💧 None 💨 7 mph H 90%29.97 inHg

4:00 AM

Mostly clear night

75° 💧 None 💨 6 mph H 90%29.97 inHg

5:00 AM

Clear night

74° 💧 None 💨 6 mph H 90%29.97 inHg

6:00 AM

Mostly clear night

73° 💧 None 💨 7 mph H 90%30.00 inHg

7:00 AM

Mostly cloudy

73° 💧 None 💨 7 mph H 91%30.00 inHg

8:00 AM

Overcast

74° 💧 None 💨 7 mph H 87%30.00 inHg

9:00 AM

Overcast

76° 💧 None 💨 6 mph H 82%30.03 inHg

10:00 AM

Light thunderstorms

76° 💧 0.017 in 💨 4 mph H 84%30.06 inHg

11:00 AM

Light rain

77° 💧 0.006 in 💨 7 mph H 81%30.03 inHg

12:00 PM

Mostly cloudy

82° 💧 0.000 in 💨 5 mph H 68%30.00 inHg

1:00 PM

Mostly cloudy

85° 💧 None 💨 7 mph H 61%30.00 inHg

2:00 PM

Overcast

86° 💧 None 💨 7 mph H 58%29.97 inHg

3:00 PM

Overcast

86° 💧 None 💨 7 mph H 56%29.97 inHg

4:00 PM

Sunny

86° 💧 None 💨 7 mph H 55%29.94 inHg

5:00 PM

Sunny

86° 💧 None 💨 7 mph H 55%29.97 inHg

6:00 PM

Mostly sunny

85° 💧 None 💨 7 mph H 57%29.94 inHg

7:00 PM

Mostly cloudy

83° 💧 None 💨 6 mph H 62%29.97 inHg

8:00 PM

Overcast night

80° 💧 None 💨 9 mph H 67%29.97 inHg

9:00 PM

Mostly cloudy night

79° 💧 None 💨 9 mph H 67%29.97 inHg

10:00 PM

Mostly cloudy night

77° 💧 None 💨 9 mph H 68%30.00 inHg

11:00 PM

Partly cloudy night

76° 💧 None 💨 8 mph H 69%30.00 inHg

Monday

12:00 AM

Mostly cloudy night

75° 💧 None 💨 8 mph H 73%30.03 inHg

1:00 AM

Overcast night

74° 💧 None 💨 7 mph H 74%30.03 inHg

2:00 AM

Mostly cloudy night

73° 💧 None 💨 8 mph H 75%30.03 inHg

3:00 AM

Overcast night

72° 💧 None 💨 8 mph H 75%30.03 inHg

4:00 AM

Overcast night

71° 💧 None 💨 8 mph H 74%30.03 inHg

5:00 AM

Overcast night

70° 💧 None 💨 8 mph H 72%30.06 inHg

6:00 AM

Mostly cloudy night

70° 💧 None 💨 7 mph H 69%30.06 inHg

7:00 AM

Overcast

69° 💧 None 💨 7 mph H 69%30.09 inHg

8:00 AM

Mostly cloudy

70° 💧 None 💨 7 mph H 69%30.09 inHg

9:00 AM

Overcast

71° 💧 None 💨 8 mph H 67%30.12 inHg

10:00 AM

Mostly sunny

73° 💧 None 💨 8 mph H 65%30.09 inHg

11:00 AM

Mostly cloudy

78° 💧 None 💨 8 mph H 58%30.09 inHg

12:00 PM

Sunny

81° 💧 None 💨 8 mph H 51%30.09 inHg

1:00 PM

Sunny

84° 💧 None 💨 9 mph H 45%30.06 inHg

2:00 PM

Sunny

85° 💧 None 💨 9 mph H 40%30.06 inHg

3:00 PM

Mostly sunny

86° 💧 None 💨 9 mph H 37%30.03 inHg

4:00 PM

Mostly sunny

86° 💧 None 💨 10 mph H 36%30.03 inHg

5:00 PM

Mostly cloudy

86° 💧 None 💨 10 mph H 37%30.00 inHg

6:00 PM

Mostly cloudy

84° 💧 None 💨 10 mph H 40%30.00 inHg

7:00 PM

Overcast

81° 💧 None 💨 9 mph H 46%30.00 inHg

8:00 PM

Overcast night

78° 💧 None 💨 9 mph H 50%30.03 inHg

9:00 PM

Mostly cloudy night

76° 💧 None 💨 9 mph H 55%30.03 inHg

10:00 PM

Partly cloudy night

75° 💧 None 💨 9 mph H 58%30.06 inHg

11:00 PM

Mostly clear night

73° 💧 None 💨 8 mph H 60%30.06 inHg

Tuesday

12:00 AM

Clear night

72° 💧 None 💨 8 mph H 63%30.06 inHg

1:00 AM

Overcast night

72° 💧 None 💨 9 mph H 63%30.06 inHg

2:00 AM

Overcast night

71° 💧 None 💨 8 mph H 64%30.06 inHg

3:00 AM

Overcast night

71° 💧 None 💨 8 mph H 64%30.03 inHg

4:00 AM

Overcast night

71° 💧 None 💨 8 mph H 64%30.03 inHg

5:00 AM

Mostly cloudy night

70° 💧 None 💨 8 mph H 65%30.06 inHg

6:00 AM

Mostly cloudy night

70° 💧 None 💨 8 mph H 66%30.06 inHg

7:00 AM

Mostly cloudy

70° 💧 None 💨 9 mph H 67%30.06 inHg

4:00 PM

Sunny

97° 💧 None 💨 10 mph H 33%29.94 inHg

7:00 PM

Mostly sunny

92° 💧 None 💨 8 mph H 40%29.91 inHg

10:00 PM

Mostly clear night

86° 💧 None 💨 10 mph H 39%29.97 inHg

Wednesday

1:00 AM

Partly cloudy night

84° 💧 None 💨 11 mph H 36%29.94 inHg

4:00 AM

Partly cloudy night

84° 💧 None 💨 10 mph H 38%29.94 inHg

7:00 AM

Partly cloudy

78° 💧 None 💨 2 mph H 61%30.00 inHg

10:00 AM

Mostly sunny

84° 💧 None 💨 5 mph H 61%30.03 inHg

1:00 PM

Light thunderstorms

80° 💧 None 💨 8 mph H 91%30.00 inHg

4:00 PM

Overcast

80° 💧 None 💨 7 mph H 86%29.97 inHg

7:00 PM

Light thunderstorms

76° 💧 None 💨 9 mph H 92%29.97 inHg

10:00 PM

Light rain

74° 💧 None 💨 5 mph H 97%29.97 inHg

Thursday

1:00 AM

Mostly cloudy night

72° 💧 None 💨 4 mph H 98%29.97 inHg

4:00 AM

Partly cloudy night

71° 💧 None 💨 5 mph H 99%29.97 inHg

7:00 AM

Mostly cloudy

67° 💧 None 💨 5 mph H 97%30.00 inHg

10:00 AM

Sunny

74° 💧 None 💨 5 mph H 74%30.03 inHg

1:00 PM

Sunny

80° 💧 None 💨 3 mph H 53%30.00 inHg

4:00 PM

Sunny

81° 💧 None 💨 5 mph H 47%29.94 inHg

7:00 PM

Sunny

74° 💧 None 💨 3 mph H 63%29.91 inHg

10:00 PM

Clear night

67° 💧 None 💨 3 mph H 64%29.94 inHg

Friday

1:00 AM

Clear night

63° 💧 None 💨 4 mph H 82%29.94 inHg

4:00 AM

Mostly cloudy night

62° 💧 None 💨 5 mph H 82%29.94 inHg

7:00 AM

Sunny

60° 💧 None 💨 6 mph H 83%29.91 inHg

10:00 AM

Mostly cloudy

73° 💧 None 💨 6 mph H 67%29.91 inHg

1:00 PM

Overcast

82° 💧 None 💨 9 mph H 55%29.85 inHg

7:00 PM

Overcast

83° 💧 None 💨 7 mph H 55%29.91 inHg

Saturday

1:00 AM

Clear night

78° 💧 None 💨 6 mph H 67%29.80 inHg

7:00 AM

Mostly sunny

73° 💧 None 💨 9 mph H 75%29.80 inHg

1:00 PM

Mostly cloudy

68° 💧 None 💨 9 mph H 94%29.77 inHg

7:00 PM

Sunny

86° 💧 None 💨 15 mph H 64%29.71 inHg

Sunday

1:00 AM

Clear night

88° 💧 None 💨 13 mph H 66%29.59 inHg

7:00 AM

Partly cloudy

84° 💧 None 💨 13 mph H 56%29.65 inHg

1:00 PM

Overcast

68° 💧 None 💨 13 mph H 85%29.80 inHg

7:00 PM

Moderate rain

66° 💧 None 💨 12 mph H 89%29.97 inHg

Monday

1:00 AM

Partly cloudy night

69° 💧 None 💨 12 mph H 62%30.03 inHg

7:00 AM

Sunny

61° 💧 None 💨 8 mph H 68%30.15 inHg

1:00 PM

Sunny

55° 💧 None 💨 9 mph H 81%30.24 inHg

7:00 PM

Sunny

71° 💧 None 💨 5 mph H 41%30.27 inHg

Tuesday

1:00 AM

Clear night

66° 💧 None 💨 4 mph H 58%30.18 inHg

7:00 AM

Sunny

56° 💧 None 💨 3 mph H 84%30.21 inHg

1:00 PM

Sunny

52° 💧 None 💨 3 mph H 92%30.24 inHg

7:00 PM

Sunny

74° 💧 None 💨 4 mph H 44%30.21 inHg

Wednesday

1:00 AM

Clear night

70° 💧 None 💨 1 mph H 61%30.15 inHg

7:00 AM

Sunny

61° 💧 None 💨 4 mph H 79%30.21 inHg

1:00 PM

Sunny

56° 💧 None 💨 3 mph H 93%30.27 inHg

7:00 PM

Sunny

79° 💧 None 💨 6 mph H 43%30.27 inHg

Thursday

1:00 AM

Clear night

75° 💧 None 💨 2 mph H 59%30.21 inHg

7:00 AM

Mostly sunny

66° 💧 None 💨 5 mph H 73%30.24 inHg

1:00 PM

Partly cloudy

61° 💧 None 💨 3 mph H 85%30.27 inHg

7:00 PM

Partly cloudy

82° 💧 None 💨 5 mph H 41%30.24 inHg

Friday

1:00 AM

Mostly cloudy night

77° 💧 None 💨 4 mph H 53%30.18 inHg

7:00 AM

Overcast

71° 💧 None 💨 6 mph H 65%30.18 inHg

1:00 PM

Moderate rain

65° 💧 None 💨 6 mph H 93%30.15 inHg

7:00 PM

Mostly cloudy

70° 💧 None 💨 10 mph H 76%30.09 inHg

Saturday

1:00 AM

Mostly cloudy night

71° 💧 None 💨 9 mph H 73%29.97 inHg

7:00 AM

Mostly cloudy

70° 💧 None 💨 9 mph H 64%29.91 inHg

1:00 PM

Overcast

68° 💧 None 💨 6 mph H 82%29.88 inHg

7:00 PM

Overcast

80° 💧 None 💨 4 mph H 61%29.88 inHg

Sunday

1:00 AM

Overcast night

75° 💧 None 💨 3 mph H 80%29.83 inHg

7:00 AM

Mostly cloudy

67° 💧 None 💨 1 mph H 97%29.85 inHg

1:00 PM

Mostly cloudy

65° 💧 None 💨 7 mph H 99%29.85 inHg

In Williamstown and, more broadly, across the state of Missouri: This evening, temperatures will remain very hot, with lows between 92 and 97 degrees Fahrenheit. The sky will be a mix of sun and clouds, creating partly cloudy conditions. There is a slight chance of rain, with possible accumulations around 0.02 inches, and the highest probability of rain occurring in the next few hours is about 36%. Winds will be light, coming from the southeast at speeds up to 9 mph, with gusts reaching 20 mph. Overall, expect warm and partly cloudy conditions through the evening, with a small chance of brief rain showers.

15-Day Weather Outlook for Williamstown

Monday, Sep 7Mon Sep 7

Mostly cloudy 86°/69° 💧 None 💨 10 mph

Tuesday, Sep 8Tue Sep 8

Overcast 97°/70° 💧 0.002 in 💨 10 mph

Wednesday, Sep 9Wed Sep 9

Light thunderstorms 92°/78° 💧 0.253 in 💨 11 mph

Thursday, Sep 10Thu Sep 10

Light thunderstorms 81°/67° 💧 0.466 in 💨 9 mph

Friday, Sep 11Fri Sep 11

Mostly cloudy 82°/60° 💧 None 💨 9 mph

Saturday, Sep 12Sat Sep 12

Overcast 83°/68° 💧 0.118 in 💨 9 mph

Sunday, Sep 13Sun Sep 13

Overcast 88°/68° 💧 0.020 in 💨 15 mph

Monday, Sep 14Mon Sep 14

Moderate rain 69°/55° 💧 0.187 in 💨 12 mph

Tuesday, Sep 15Tue Sep 15

Sunny 71°/52° 💧 None 💨 5 mph

Wednesday, Sep 16Wed Sep 16

Sunny 74°/56° 💧 None 💨 4 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 79°/61° 💧 None 💨 6 mph

Friday, Sep 18Fri Sep 18

Moderate rain 82°/65° 💧 0.166 in 💨 6 mph

Saturday, Sep 19Sat Sep 19

Mostly cloudy 71°/68° 💧 0.246 in 💨 10 mph

Sunday, Sep 20Sun Sep 20

Mostly cloudy 80°/65° 💧 0.107 in 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Williamstown

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Williamstown

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 9:00 PM

PM2.5 Fine particles Good 2,8µg/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 3,0µg/m³

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

O₃ Ozone Fair 64,4µg/m³

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

NO₂ Nitrogen dioxide Good 2,4µg/m³

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

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Williamstown

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 8,0Very high 🙂Fair

Tomorrow UV 7,7High 🙂Fair

Monday UV 8,0Very high 😐Moderate

Tuesday UV 7,7High 😐Moderate

Wednesday UV 7,0High 🙂Fair

Thursday UV 8,0Very high —Unavailable

Friday UV 8,0Very high —Unavailable

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.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure.

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 Williamstown

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · WILLIAMSTOWN, MISSOURI

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 1:00 AM–2:00 AM.

98/100Best-hour score

BEST TIME TONIGHT 1:00 AM–2:00 AM Astronomical darkness: 9:07 PM–5:05 AM

☁ Cloud cover 1% Real hourly forecast for the best viewing hour.

☾ Moonlight 32% Last Quarter · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 42° 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 min67%

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

AUG 28–SEP 5

AurigidsStart AUG 28 · Peak SEP 1 · End SEP 5 · ZHR 6 · 80% Moon at peak

ACTIVE NOW

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

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 Williamstown were last refreshed today at 8:10 PM. The current forecast period extends through 07/09/2026 at 6:00 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.