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

Now · 11:35 AM

Port William Weather & Hourly Forecast

United States · Ohio · 45164

84°F

Sunny

Feels like: 90°F

💧 Humidity 68% 🌡 Pressure 30.30 inHg 💨 Wind 4 mph 👁 Visibility 20.1 mi ☁ Clouds 3% ☀️ UV index 3.6 · Moderate 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Port William

Today

12:00 PM

Sunny

84° 💧 None 💨 4 mph H 68%30.30 inHg

3:00 PM

Strong thunderstorm

89° 💧 0.004 in 💨 5 mph H 60%30.24 inHg

6:00 PM

Light rain

87° 💧 0.007 in 💨 4 mph H 62%30.18 inHg

9:00 PM

Thunderstorms

72° 💧 0.177 in 💨 15 mph H 95%30.30 inHg

Tomorrow

12:00 AM

Clear night

72° 💧 None 💨 4 mph H 94%30.27 inHg

3:00 AM

Clear night

73° 💧 None 💨 6 mph H 90%30.21 inHg

6:00 AM

Clear night

72° 💧 None 💨 6 mph H 90%30.21 inHg

9:00 AM

Sunny

76° 💧 0.000 in 💨 7 mph H 86%30.24 inHg

12:00 PM

Sunny

83° 💧 0.001 in 💨 6 mph H 67%30.24 inHg

3:00 PM

Sunny

88° 💧 None 💨 8 mph H 57%30.15 inHg

6:00 PM

Overcast

87° 💧 0.008 in 💨 7 mph H 61%30.09 inHg

9:00 PM

Clear night

75° 💧 0.006 in 💨 8 mph H 88%30.15 inHg

Friday

12:00 AM

Partly cloudy night

73° 💧 None 💨 4 mph H 96%30.15 inHg

3:00 AM

Overcast night

72° 💧 0.011 in 💨 5 mph H 98%30.15 inHg

6:00 AM

Light thunderstorms

70° 💧 0.088 in 💨 8 mph H 96%30.18 inHg

9:00 AM

Overcast

68° 💧 None 💨 8 mph H 88%30.21 inHg

Today

12:00 PM

Sunny

84° 💧 None 💨 4 mph H 68%30.30 inHg

1:00 PM

Sunny

86° 💧 None 💨 5 mph H 64%30.27 inHg

2:00 PM

Sunny

88° 💧 None 💨 5 mph H 61%30.27 inHg

3:00 PM

Strong thunderstorm

89° 💧 0.001 in 💨 5 mph H 60%30.24 inHg

4:00 PM

Strong thunderstorm

89° 💧 0.001 in 💨 4 mph H 58%30.24 inHg

5:00 PM

Mostly sunny

89° 💧 0.001 in 💨 4 mph H 58%30.21 inHg

6:00 PM

Light rain

87° 💧 0.006 in 💨 4 mph H 62%30.18 inHg

7:00 PM

Mostly sunny

84° 💧 0.001 in 💨 3 mph H 74%30.18 inHg

8:00 PM

Clear night

81° 💧 None 💨 4 mph H 79%30.21 inHg

9:00 PM

Thunderstorms

72° 💧 0.122 in 💨 15 mph H 95%30.30 inHg

10:00 PM

Light thunderstorms

72° 💧 0.051 in 💨 4 mph H 96%30.27 inHg

11:00 PM

Light rain

72° 💧 0.004 in 💨 5 mph H 95%30.27 inHg

Tomorrow

12:00 AM

Clear night

72° 💧 None 💨 4 mph H 94%30.27 inHg

1:00 AM

Clear night

73° 💧 None 💨 5 mph H 93%30.24 inHg

2:00 AM

Clear night

73° 💧 None 💨 6 mph H 91%30.24 inHg

3:00 AM

Clear night

73° 💧 None 💨 6 mph H 90%30.21 inHg

4:00 AM

Clear night

73° 💧 None 💨 6 mph H 90%30.21 inHg

5:00 AM

Clear night

72° 💧 None 💨 6 mph H 90%30.18 inHg

6:00 AM

Clear night

72° 💧 None 💨 6 mph H 90%30.21 inHg

7:00 AM

Clear night

72° 💧 None 💨 6 mph H 90%30.21 inHg

8:00 AM

Sunny

72° 💧 None 💨 7 mph H 89%30.21 inHg

9:00 AM

Sunny

76° 💧 None 💨 7 mph H 86%30.24 inHg

10:00 AM

Sunny

80° 💧 None 💨 6 mph H 78%30.24 inHg

11:00 AM

Mostly sunny

83° 💧 0.000 in 💨 8 mph H 69%30.24 inHg

12:00 PM

Sunny

83° 💧 0.001 in 💨 6 mph H 67%30.24 inHg

1:00 PM

Sunny

85° 💧 None 💨 7 mph H 63%30.21 inHg

2:00 PM

Sunny

87° 💧 None 💨 8 mph H 60%30.18 inHg

3:00 PM

Sunny

88° 💧 None 💨 8 mph H 57%30.15 inHg

4:00 PM

Mostly sunny

89° 💧 None 💨 8 mph H 55%30.12 inHg

5:00 PM

Partly cloudy

88° 💧 None 💨 8 mph H 56%30.12 inHg

6:00 PM

Overcast

87° 💧 0.000 in 💨 7 mph H 61%30.09 inHg

7:00 PM

Overcast

84° 💧 0.000 in 💨 4 mph H 72%30.12 inHg

8:00 PM

Light rain

78° 💧 0.007 in 💨 9 mph H 82%30.12 inHg

9:00 PM

Clear night

75° 💧 0.003 in 💨 8 mph H 88%30.15 inHg

10:00 PM

Mostly clear night

74° 💧 0.001 in 💨 6 mph H 91%30.15 inHg

11:00 PM

Mostly cloudy night

74° 💧 0.002 in 💨 5 mph H 93%30.18 inHg

Friday

12:00 AM

Partly cloudy night

73° 💧 None 💨 4 mph H 96%30.15 inHg

1:00 AM

Mostly cloudy night

73° 💧 None 💨 5 mph H 97%30.15 inHg

2:00 AM

Mostly cloudy night

72° 💧 None 💨 4 mph H 97%30.15 inHg

3:00 AM

Overcast night

72° 💧 None 💨 5 mph H 98%30.15 inHg

4:00 AM

Overcast night

72° 💧 0.003 in 💨 6 mph H 98%30.15 inHg

5:00 AM

Light rain

71° 💧 0.007 in 💨 7 mph H 96%30.18 inHg

6:00 AM

Light thunderstorms

70° 💧 0.076 in 💨 8 mph H 96%30.18 inHg

7:00 AM

Light rain

69° 💧 0.011 in 💨 8 mph H 94%30.21 inHg

8:00 AM

Overcast

68° 💧 0.000 in 💨 8 mph H 92%30.21 inHg

9:00 AM

Overcast

68° 💧 None 💨 8 mph H 88%30.21 inHg

10:00 AM

Overcast

69° 💧 None 💨 8 mph H 84%30.21 inHg

11:00 AM

Overcast

70° 💧 None 💨 8 mph H 81%30.24 inHg

12:00 PM

Overcast

71° 💧 0.000 in 💨 8 mph H 77%30.24 inHg

1:00 PM

Overcast

73° 💧 None 💨 7 mph H 71%30.21 inHg

2:00 PM

Mostly cloudy

77° 💧 None 💨 6 mph H 65%30.18 inHg

3:00 PM

Overcast

77° 💧 None 💨 6 mph H 63%30.15 inHg

4:00 PM

Overcast

77° 💧 None 💨 7 mph H 62%30.15 inHg

5:00 PM

Mostly cloudy

77° 💧 None 💨 7 mph H 61%30.12 inHg

6:00 PM

Mostly sunny

77° 💧 None 💨 7 mph H 61%30.12 inHg

7:00 PM

Partly cloudy

74° 💧 None 💨 7 mph H 67%30.12 inHg

8:00 PM

Clear night

71° 💧 None 💨 7 mph H 69%30.15 inHg

Saturday

5:00 AM

Clear night

62° 💧 None 💨 6 mph H 87%30.09 inHg

8:00 AM

Sunny

62° 💧 None 💨 7 mph H 88%30.09 inHg

11:00 AM

Sunny

73° 💧 None 💨 6 mph H 75%30.06 inHg

2:00 PM

Sunny

82° 💧 None 💨 7 mph H 68%29.97 inHg

5:00 PM

Sunny

84° 💧 None 💨 8 mph H 67%29.91 inHg

8:00 PM

Clear night

79° 💧 None 💨 7 mph H 80%29.88 inHg

11:00 PM

Clear night

78° 💧 None 💨 11 mph H 75%29.91 inHg

Sunday

2:00 AM

Mostly clear night

76° 💧 None 💨 10 mph H 75%29.88 inHg

5:00 AM

Mostly cloudy night

76° 💧 None 💨 8 mph H 76%29.85 inHg

8:00 AM

Mostly cloudy

72° 💧 None 💨 3 mph H 85%29.88 inHg

11:00 AM

Mostly cloudy

79° 💧 None 💨 2 mph H 70%29.91 inHg

2:00 PM

Partly cloudy

84° 💧 None 💨 2 mph H 61%29.88 inHg

5:00 PM

Mostly sunny

84° 💧 None 💨 4 mph H 59%29.85 inHg

8:00 PM

Overcast night

71° 💧 None 💨 11 mph H 92%29.91 inHg

11:00 PM

Mostly cloudy night

68° 💧 None 💨 9 mph H 90%29.97 inHg

Monday

2:00 AM

Mostly cloudy night

66° 💧 None 💨 9 mph H 91%29.97 inHg

5:00 AM

Partly cloudy night

65° 💧 None 💨 7 mph H 93%29.97 inHg

8:00 AM

Mostly cloudy

65° 💧 None 💨 7 mph H 91%30.00 inHg

11:00 AM

Overcast

72° 💧 None 💨 7 mph H 78%30.00 inHg

2:00 PM

Mostly sunny

80° 💧 None 💨 4 mph H 68%29.97 inHg

5:00 PM

Mostly cloudy

83° 💧 None 💨 8 mph H 62%29.88 inHg

8:00 PM

Moderate rain

75° 💧 None 💨 6 mph H 78%29.94 inHg

11:00 PM

Overcast night

70° 💧 None 💨 6 mph H 94%29.97 inHg

Tuesday

2:00 AM

Clear night

70° 💧 None 💨 5 mph H 97%29.97 inHg

8:00 AM

Light rain

67° 💧 None 💨 6 mph H 92%30.03 inHg

2:00 PM

Overcast

64° 💧 None 💨 10 mph H 97%30.06 inHg

8:00 PM

Light rain

76° 💧 None 💨 8 mph H 73%30.09 inHg

Wednesday

2:00 AM

Partly cloudy night

72° 💧 None 💨 9 mph H 83%30.09 inHg

8:00 AM

Sunny

67° 💧 None 💨 9 mph H 88%30.15 inHg

2:00 PM

Light rain

65° 💧 None 💨 8 mph H 94%30.21 inHg

8:00 PM

Mostly clear night

80° 💧 None 💨 7 mph H 67%30.18 inHg

Thursday

2:00 AM

Mostly clear night

73° 💧 None 💨 9 mph H 84%30.18 inHg

8:00 AM

Mostly sunny

68° 💧 None 💨 9 mph H 90%30.21 inHg

2:00 PM

Overcast

65° 💧 None 💨 10 mph H 85%30.24 inHg

8:00 PM

Partly cloudy night

80° 💧 None 💨 8 mph H 59%30.21 inHg

Friday

2:00 AM

Partly cloudy night

75° 💧 None 💨 5 mph H 72%30.15 inHg

8:00 AM

Mostly cloudy

70° 💧 None 💨 10 mph H 71%30.15 inHg

2:00 PM

Partly cloudy

66° 💧 None 💨 10 mph H 79%30.18 inHg

8:00 PM

Mostly cloudy night

84° 💧 None 💨 9 mph H 54%30.12 inHg

Saturday

2:00 AM

Partly cloudy night

71° 💧 None 💨 5 mph H 94%30.09 inHg

8:00 AM

Overcast

68° 💧 None 💨 2 mph H 95%30.09 inHg

2:00 PM

Mostly cloudy

67° 💧 None 💨 5 mph H 99%30.09 inHg

8:00 PM

Light rain

75° 💧 None 💨 5 mph H 74%30.06 inHg

Sunday

2:00 AM

Clear night

70° 💧 None 💨 4 mph H 83%30.03 inHg

8:00 AM

Sunny

64° 💧 None 💨 3 mph H 94%30.03 inHg

2:00 PM

Overcast

62° 💧 None 💨 3 mph H 96%30.06 inHg

8:00 PM

Overcast night

76° 💧 None 💨 4 mph H 63%30.03 inHg

Monday

2:00 AM

Mostly clear night

69° 💧 None 💨 6 mph H 81%30.00 inHg

8:00 AM

Mostly sunny

62° 💧 None 💨 7 mph H 89%30.06 inHg

2:00 PM

Sunny

58° 💧 None 💨 7 mph H 90%30.06 inHg

8:00 PM

Clear night

73° 💧 None 💨 6 mph H 55%30.03 inHg

Tuesday

2:00 AM

Clear night

66° 💧 None 💨 5 mph H 76%30.00 inHg

8:00 AM

Sunny

61° 💧 None 💨 8 mph H 82%30.00 inHg

2:00 PM

Sunny

58° 💧 None 💨 5 mph H 90%30.00 inHg

8:00 PM

Mostly clear night

78° 💧 None 💨 2 mph H 54%29.97 inHg

Wednesday

2:00 AM

Clear night

70° 💧 None 💨 5 mph H 73%29.91 inHg

8:00 AM

Sunny

64° 💧 None 💨 5 mph H 84%29.91 inHg

2:00 PM

Sunny

60° 💧 None 💨 6 mph H 91%29.97 inHg

8:00 PM

Light rain

80° 💧 None 💨 2 mph H 54%29.94 inHg

Thursday

2:00 AM

Mostly clear night

73° 💧 None 💨 6 mph H 72%29.94 inHg

In Port William and, more broadly, across the state of Ohio: This morning will bring a mix of sun and clouds, with temperatures starting around 70 degrees. As the day progresses, expect the heat to intensify, reaching up to 86 degrees by the afternoon. Light west winds will generally be around 4 mph, with occasional gusts up to 14 mph. There is a possibility of light rain, with total accumulation around 0.28 inches, and a high likelihood of rain during the day. Be prepared for the changing weather, especially if planning outdoor activities later in the day. The combination of warm temperatures and a chance of rain could lead to brief showers, so carrying an umbrella might be a good idea. Overall, expect a warm and partly cloudy day with occasional showers.

15-Day Weather Outlook for Port William

TomorrowTomorrow

Mostly sunny 89°/72° 💧 None 💨 9 mph

Friday, Sep 18Fri Sep 18

Light thunderstorms 77°/68° 💧 None 💨 8 mph

Saturday, Sep 19Sat Sep 19

Sunny 84°/62° 💧 0.520 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Overcast 84°/68° 💧 0.086 in 💨 11 mph

Monday, Sep 21Mon Sep 21

Moderate rain 83°/65° 💧 0.205 in 💨 9 mph

Tuesday, Sep 22Tue Sep 22

Light rain 76°/64° 💧 0.056 in 💨 10 mph

Wednesday, Sep 23Wed Sep 23

Light rain 80°/65° 💧 0.096 in 💨 9 mph

Thursday, Sep 24Thu Sep 24

Overcast 80°/65° 💧 0.062 in 💨 10 mph

Friday, Sep 25Fri Sep 25

Partly cloudy 84°/66° 💧 0.001 in 💨 10 mph

Saturday, Sep 26Sat Sep 26

Light rain 75°/67° 💧 0.598 in 💨 5 mph

Sunday, Sep 27Sun Sep 27

Overcast 76°/62° 💧 0.016 in 💨 4 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 73°/58° 💧 0.004 in 💨 7 mph

Tuesday, Sep 29Tue Sep 29

Mostly sunny 78°/58° 💧 None 💨 8 mph

Wednesday, Sep 30Wed Sep 30

Light rain 80°/60° 💧 0.007 in 💨 6 mph

Thursday, Oct 1Thu Oct 1

Mostly sunny 73°/73° 💧 0.013 in 💨 6 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Port William

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Port William

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 12:00 PM

PM2.5 Fine particles Good 8,5µg/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 9,6µg/m³

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

O₃ Ozone Fair 85,2µg/m³

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

NO₂ Nitrogen dioxide Good 1,5µg/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 Port William

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 6,8High 🙂Fair

Tomorrow UV 6,4High 😐Moderate

Friday UV 5,6Moderate 🙂Fair

Saturday UV 6,2High 🙂Fair

Sunday UV 7,0High 😊Good

Monday UV 6,0High —Unavailable

Tuesday UV 5,0Moderate —Unavailable

Hourly UV index today

12:00 PMUV 5,3 1:00 PMUV 6,3 2:00 PMUV 6,8 3:00 PMUV 4,6 4:00 PMUV 1,6 5:00 PMUV 1,4 6:00 PMUV 0,8 7:00 PMUV 0,2

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

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

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.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Port William

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · PORT WILLIAM, OHIO

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

98/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 9:13 PM–5:47 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 31% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 89° high at the best hour.

✦ Estimated visible meteors 2–5/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min81%

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 Port William were last refreshed today at 11:35 AM. The current forecast period extends through 18/09/2026 at 9:00 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.