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Current weather in St. Marys is clear sky.

Where can I find the hourly weather forecast for St. Marys?

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

Is the weather forecast for St. Marys updated regularly?

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

Now · 12:26 PM

St. Marys Weather & Hourly Forecast

United States · Ohio · 45885

74°F

Sunny

Feels like: 75°F

💧 Humidity 77% 🌡 Pressure 30.15 inHg 💨 Wind 8 mph 👁 Visibility 6.2 mi ☁ Clouds 0% ☀️ UV index 6.0 · High 🌅 Sunrise 7:01 AM 🌇 Sunset 8:16 PM

Hourly Forecast for St. Marys

Today

1:00 PM

Sunny

74° 💧 None 💨 8 mph H 77%30.15 inHg

4:00 PM

Sunny

78° 💧 None 💨 7 mph H 67%30.12 inHg

7:00 PM

Sunny

77° 💧 None 💨 6 mph H 79%30.12 inHg

10:00 PM

Clear night

66° 💧 None 💨 7 mph H 85%30.18 inHg

Tomorrow

1:00 AM

Clear night

63° 💧 None 💨 6 mph H 75%30.18 inHg

4:00 AM

Mostly clear night

60° 💧 None 💨 5 mph H 72%30.15 inHg

7:00 AM

Partly cloudy night

58° 💧 None 💨 5 mph H 76%30.18 inHg

10:00 AM

Overcast

70° 💧 None 💨 5 mph H 74%30.21 inHg

1:00 PM

Mostly cloudy

79° 💧 None 💨 6 mph H 68%30.15 inHg

4:00 PM

Overcast

81° 💧 None 💨 4 mph H 67%30.12 inHg

7:00 PM

Overcast

78° 💧 None 💨 1 mph H 80%30.09 inHg

10:00 PM

Overcast night

71° 💧 None 💨 3 mph H 87%30.09 inHg

Sunday

1:00 AM

Overcast night

69° 💧 None 💨 7 mph H 86%30.09 inHg

4:00 AM

Partly cloudy night

64° 💧 None 💨 8 mph H 88%30.06 inHg

7:00 AM

Mostly cloudy night

65° 💧 None 💨 8 mph H 81%30.06 inHg

10:00 AM

Overcast

73° 💧 None 💨 9 mph H 78%30.06 inHg

Today

1:00 PM

Sunny

74° 💧 None 💨 8 mph H 77%30.15 inHg

2:00 PM

Sunny

75° 💧 None 💨 9 mph H 74%30.15 inHg

3:00 PM

Sunny

77° 💧 None 💨 8 mph H 70%30.15 inHg

4:00 PM

Sunny

78° 💧 None 💨 7 mph H 67%30.12 inHg

5:00 PM

Sunny

79° 💧 None 💨 7 mph H 66%30.12 inHg

6:00 PM

Sunny

79° 💧 None 💨 6 mph H 72%30.12 inHg

7:00 PM

Sunny

77° 💧 None 💨 6 mph H 79%30.12 inHg

8:00 PM

Sunny

73° 💧 None 💨 7 mph H 84%30.12 inHg

9:00 PM

Clear night

69° 💧 None 💨 7 mph H 86%30.15 inHg

10:00 PM

Clear night

66° 💧 None 💨 7 mph H 85%30.18 inHg

11:00 PM

Clear night

65° 💧 None 💨 6 mph H 82%30.18 inHg

Tomorrow

12:00 AM

Clear night

64° 💧 None 💨 6 mph H 79%30.18 inHg

1:00 AM

Clear night

63° 💧 None 💨 6 mph H 75%30.18 inHg

2:00 AM

Clear night

62° 💧 None 💨 6 mph H 72%30.18 inHg

3:00 AM

Partly cloudy night

61° 💧 None 💨 5 mph H 69%30.15 inHg

4:00 AM

Mostly clear night

60° 💧 None 💨 5 mph H 72%30.15 inHg

5:00 AM

Partly cloudy night

59° 💧 None 💨 7 mph H 72%30.15 inHg

6:00 AM

Partly cloudy night

58° 💧 None 💨 7 mph H 74%30.18 inHg

7:00 AM

Partly cloudy night

58° 💧 None 💨 5 mph H 76%30.18 inHg

8:00 AM

Partly cloudy

61° 💧 None 💨 7 mph H 80%30.18 inHg

9:00 AM

Overcast

65° 💧 None 💨 6 mph H 79%30.18 inHg

10:00 AM

Overcast

70° 💧 None 💨 5 mph H 74%30.21 inHg

11:00 AM

Mostly cloudy

74° 💧 None 💨 5 mph H 71%30.18 inHg

12:00 PM

Mostly cloudy

77° 💧 None 💨 6 mph H 69%30.18 inHg

1:00 PM

Mostly cloudy

79° 💧 None 💨 6 mph H 68%30.15 inHg

2:00 PM

Mostly cloudy

81° 💧 None 💨 6 mph H 67%30.15 inHg

3:00 PM

Overcast

81° 💧 None 💨 5 mph H 68%30.12 inHg

4:00 PM

Overcast

81° 💧 None 💨 4 mph H 67%30.12 inHg

5:00 PM

Overcast

81° 💧 None 💨 2 mph H 71%30.09 inHg

6:00 PM

Overcast

80° 💧 None 💨 1 mph H 78%30.09 inHg

7:00 PM

Overcast

78° 💧 None 💨 1 mph H 80%30.09 inHg

8:00 PM

Overcast

75° 💧 None 💨 4 mph H 82%30.09 inHg

9:00 PM

Overcast night

72° 💧 None 💨 5 mph H 86%30.09 inHg

10:00 PM

Overcast night

71° 💧 None 💨 3 mph H 87%30.09 inHg

11:00 PM

Overcast night

70° 💧 None 💨 5 mph H 86%30.09 inHg

Sunday

12:00 AM

Overcast night

69° 💧 None 💨 7 mph H 86%30.09 inHg

1:00 AM

Overcast night

69° 💧 None 💨 7 mph H 86%30.09 inHg

2:00 AM

Mostly cloudy night

69° 💧 None 💨 6 mph H 86%30.09 inHg

3:00 AM

Partly cloudy night

64° 💧 None 💨 7 mph H 87%30.06 inHg

4:00 AM

Partly cloudy night

64° 💧 None 💨 8 mph H 88%30.06 inHg

5:00 AM

Mostly cloudy night

65° 💧 None 💨 8 mph H 84%30.06 inHg

6:00 AM

Mostly cloudy night

64° 💧 None 💨 8 mph H 84%30.06 inHg

7:00 AM

Mostly cloudy night

65° 💧 None 💨 8 mph H 81%30.06 inHg

8:00 AM

Mostly cloudy

66° 💧 None 💨 7 mph H 83%30.09 inHg

9:00 AM

Overcast

69° 💧 None 💨 7 mph H 84%30.09 inHg

10:00 AM

Overcast

73° 💧 None 💨 9 mph H 78%30.06 inHg

11:00 AM

Overcast

76° 💧 None 💨 10 mph H 73%30.09 inHg

12:00 PM

Mostly cloudy

79° 💧 None 💨 11 mph H 70%30.09 inHg

1:00 PM

Overcast

81° 💧 None 💨 11 mph H 67%30.06 inHg

2:00 PM

Mostly cloudy

82° 💧 None 💨 12 mph H 66%30.03 inHg

3:00 PM

Sunny

83° 💧 None 💨 12 mph H 67%30.03 inHg

4:00 PM

Mostly sunny

83° 💧 None 💨 11 mph H 70%30.00 inHg

5:00 PM

Partly cloudy

83° 💧 None 💨 10 mph H 74%30.00 inHg

6:00 PM

Partly cloudy

81° 💧 None 💨 9 mph H 77%30.00 inHg

7:00 PM

Mostly cloudy

79° 💧 None 💨 6 mph H 83%30.00 inHg

8:00 PM

Mostly cloudy

76° 💧 None 💨 7 mph H 83%30.00 inHg

9:00 PM

Overcast night

74° 💧 None 💨 8 mph H 81%29.97 inHg

10:00 PM

Overcast night

73° 💧 None 💨 8 mph H 76%30.00 inHg

11:00 PM

Overcast night

73° 💧 None 💨 7 mph H 71%30.00 inHg

Monday

12:00 AM

Overcast night

72° 💧 None 💨 10 mph H 69%30.00 inHg

1:00 AM

Mostly cloudy night

71° 💧 None 💨 9 mph H 69%30.00 inHg

2:00 AM

Mostly cloudy night

70° 💧 None 💨 8 mph H 69%30.00 inHg

3:00 AM

Mostly clear night

70° 💧 None 💨 9 mph H 69%30.00 inHg

4:00 AM

Partly cloudy night

70° 💧 None 💨 9 mph H 69%29.97 inHg

5:00 AM

Mostly cloudy night

70° 💧 None 💨 9 mph H 68%30.00 inHg

6:00 AM

Mostly cloudy night

70° 💧 None 💨 9 mph H 69%29.97 inHg

7:00 AM

Partly cloudy night

70° 💧 None 💨 9 mph H 71%30.00 inHg

8:00 AM

Partly cloudy

69° 💧 None 💨 9 mph H 82%30.03 inHg

9:00 AM

Sunny

72° 💧 None 💨 10 mph H 81%30.03 inHg

10:00 AM

Mostly sunny

76° 💧 None 💨 10 mph H 78%30.03 inHg

11:00 AM

Partly cloudy

79° 💧 None 💨 11 mph H 72%30.03 inHg

12:00 PM

Partly cloudy

82° 💧 None 💨 11 mph H 68%30.03 inHg

1:00 PM

Partly cloudy

84° 💧 None 💨 11 mph H 66%30.00 inHg

2:00 PM

Partly cloudy

85° 💧 None 💨 11 mph H 67%30.00 inHg

3:00 PM

Partly cloudy

85° 💧 None 💨 11 mph H 68%30.00 inHg

4:00 PM

Partly cloudy

86° 💧 None 💨 11 mph H 70%29.97 inHg

5:00 PM

Partly cloudy

86° 💧 None 💨 12 mph H 73%29.94 inHg

6:00 PM

Mostly cloudy

84° 💧 None 💨 11 mph H 76%29.94 inHg

7:00 PM

Mostly cloudy

81° 💧 None 💨 8 mph H 84%29.94 inHg

8:00 PM

Mostly cloudy

79° 💧 None 💨 9 mph H 85%29.94 inHg

9:00 PM

Overcast night

78° 💧 None 💨 10 mph H 79%29.94 inHg

10:00 PM

Overcast night

79° 💧 None 💨 10 mph H 69%29.94 inHg

11:00 PM

Overcast night

78° 💧 None 💨 10 mph H 65%29.97 inHg

Tuesday

12:00 AM

Overcast night

79° 💧 None 💨 11 mph H 61%29.94 inHg

1:00 AM

Overcast night

78° 💧 None 💨 11 mph H 60%29.94 inHg

2:00 AM

Overcast night

78° 💧 None 💨 11 mph H 60%29.94 inHg

3:00 AM

Partly cloudy night

76° 💧 None 💨 10 mph H 62%29.94 inHg

4:00 AM

Mostly cloudy night

77° 💧 None 💨 11 mph H 61%29.94 inHg

5:00 AM

Mostly cloudy night

77° 💧 None 💨 13 mph H 61%29.94 inHg

6:00 AM

Mostly cloudy night

80° 💧 None 💨 15 mph H 56%29.94 inHg

7:00 AM

Overcast night

80° 💧 None 💨 14 mph H 56%29.97 inHg

8:00 AM

Overcast

77° 💧 None 💨 13 mph H 68%29.97 inHg

9:00 AM

Overcast

76° 💧 None 💨 10 mph H 77%30.00 inHg

10:00 AM

Overcast

77° 💧 None 💨 11 mph H 78%30.00 inHg

11:00 AM

Overcast

80° 💧 None 💨 12 mph H 76%30.00 inHg

12:00 PM

Mostly cloudy

84° 💧 None 💨 13 mph H 70%30.00 inHg

In St. Marys and, more broadly, across the state of Ohio: Clear skies will persist through the afternoon, with temperatures warming to a comfortable range between 62 and 75 degrees Fahrenheit. Winds will be moderate, coming from the northeast at up to 10 mph, with gusts reaching 12 mph. No significant rainfall is expected today, so it should remain dry throughout the rest of the day. Overall, it’s a pleasant day with mild temperatures and gentle breezes, perfect for outdoor activities.

15-Day Weather Outlook for St. Marys

TomorrowTomorrow

Mostly cloudy 81°/58° 💧 None 💨 7 mph

Sunday, Aug 30Sun Aug 30

Overcast 83°/64° 💧 None 💨 12 mph

Monday, Aug 31Mon Aug 31

Partly cloudy 86°/69° 💧 None 💨 12 mph

Tuesday, Sep 1Tue Sep 1

Mostly cloudy 87°/77° 💧 None 💨 13 mph

Wednesday, Sep 2Wed Sep 2

Light rain 87°/73° 💧 0.01 in 💨 13 mph

Thursday, Sep 3Thu Sep 3

Partly cloudy 88°/76° 💧 None 💨 12 mph

Friday, Sep 4Fri Sep 4

Light rain 90°/75° 💧 0.00 in 💨 10 mph

Saturday, Sep 5Sat Sep 5

Light rain 89°/73° 💧 0.02 in 💨 10 mph

Sunday, Sep 6Sun Sep 6

Heavy rain 86°/69° 💧 0.92 in 💨 9 mph

Monday, Sep 7Mon Sep 7

Light rain 79°/65° 💧 0.12 in 💨 12 mph

Tuesday, Sep 8Tue Sep 8

Overcast 70°/59° 💧 None 💨 7 mph

Wednesday, Sep 9Wed Sep 9

Light rain 75°/57° 💧 0.01 in 💨 11 mph

Thursday, Sep 10Thu Sep 10

Sunny 70°/51° 💧 None 💨 7 mph

Friday, Sep 11Fri Sep 11

Sunny 71°/52° 💧 None 💨 5 mph

Saturday, Sep 12Sat Sep 12

Light rain 78°/60° 💧 0.02 in 💨 15 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in St. Marys

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for St. Marys

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 1:00 PM

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

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

O₃ Ozone Fair 86,4µg/m³

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

NO₂ Nitrogen dioxide Good 0,9µg/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 St. Marys

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 7,0High 🙂Fair

Tomorrow UV 5,0Moderate 😐Moderate

Sunday UV 6,0High 😐Moderate

Monday UV 7,0High 😐Moderate

Tuesday UV 7,0High 🙂Fair

Wednesday UV 7,0High —Unavailable

Thursday UV 7,0High —Unavailable

Hourly UV index today

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

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.

Comfortable temperature conditions

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

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 St. Marys

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

Internal PR simulation: 4.06 Population: 8,301

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Forecast data for St. Marys were last refreshed today at 12:22 PM. The current forecast period extends through 30/08/2026 at 10:00 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.