St. Marys, ON Weather

    05:00 Sunday
    Light rain
    Light rain with cloudy skies
    18° Feels like 18°
    Rainfall 30% 0.4 mm
    reloj Hourly Light rain in the next few hours
    • Today 30 Aug. Light rain with partly cloudy skies 90% 4.7 mm 23° / 17° Moderate west wind 17 - 33 km/h
    • Tomorrow 31 Aug. Thunderstorm with partly cloudy skies 80% 6.6 mm 27° / 17° Moderate east wind 15 - 27 km/h
    • Tuesday 1 Sept. Fog More information 27° / 20° Moderate west wind 19 - 37 km/h
    • Wednesday 2 Sept. Thunderstorm with partly cloudy skies 80% 10 mm 28° / 20° Moderate west wind 22 - 46 km/h
    • Thursday 3 Sept. Light rain with partly cloudy skies 70% 0.3 mm 26° / 18° Moderate northwest wind 12 - 28 km/h
    • Friday 4 Sept. Scattered clouds 26° / 15° Moderate north wind 12 - 26 km/h
    • Saturday 5 Sept. Scattered clouds 26° / 15° Moderate northeast wind 9 - 23 km/h

    Weather Forecast for St. Marys, ON Today

    , 30 August

    Tomorrow

    , 31 August
    06:00 Light rain with cloudy skies 30% 0.016 mm 18° Light rain
    Feels Like 18°
    Gentle northeast wind Northeast 1 - 5 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 30% 0.016 mm
    • Humidity Humidity 85%
    • Dew Point Dew Point 16 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 18 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 1 km/h
    • Pressure Pressure 1019 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 5 km/h
    • Snowline Snowline 13451 ft
    07:00 Light rain with cloudy skies 30% 0.008 mm 18° Light rain
    Feels Like 18°
    Gentle southeast wind Southeast 3 - 7 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 30% 0.008 mm
    • Humidity Humidity 89%
    • Dew Point Dew Point 16 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 18 °C
    • Visibility Visibility 25 km
    • Wind Wind - Average 3 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 7 km/h
    • Snowline Snowline 13780 ft
    08:00 Light rain with cloudy skies 30% 0.004 mm 19° Light rain
    Feels Like 19°
    Gentle south wind South 8 - 12 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 30% 0.004 mm
    • Humidity Humidity 89%
    • Dew Point Dew Point 17 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 19 °C
    • Visibility Visibility 25 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1019 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 12 km/h
    • Snowline Snowline 14108 ft
    09:00 Overcast 20° Overcast
    Feels Like 20°
    Gentle southwest wind Southwest 9 - 15 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 90%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 20 °C
    • Visibility Visibility 25 km
    • Wind Wind - Average 9 km/h
    • Pressure Pressure 1019 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 15 km/h
    • Snowline Snowline 13780 ft
    10:00 Overcast 20° Overcast
    Feels Like 20°
    Gentle southwest wind Southwest 8 - 15 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 91%
    • Dew Point Dew Point 19 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 20 °C
    • Visibility Visibility 14 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1019 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 15 km/h
    • Snowline Snowline 13780 ft
    Partly cloudy 11:00 Partly cloudy 20° Partly cloudy
    Feels Like 20°
    Gentle southwest wind Southwest 8 - 16 km/h
    		UV Index 4 Moderate SPF: 6-10
    11:00 Overcast 20° Overcast
    Feels Like 20°
    Gentle southwest wind Southwest 8 - 16 km/h
    		UV Index 4 Moderate SPF: 6-10
    • Rain Rain 20% 0 mm
    • Humidity Humidity 91%
    • Dew Point Dew Point 19 °C
    • Clouds Clouds 77%
    • Feels Like Feels Like 20 °C
    • Visibility Visibility 25 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1019 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 16 km/h
    • Snowline Snowline 14108 ft
    12:00 Partly cloudy 22° Partly cloudy
    Feels Like 22°
    Moderate west wind West 13 - 25 km/h
    		UV Index 5 Moderate SPF: 6-10
    • Rain Rain 20% 0 mm
    • Humidity Humidity 75%
    • Dew Point Dew Point 17 °C
    • Clouds Clouds 72%
    • Feels Like Feels Like 22 °C
    • Visibility Visibility 30 km
    • Wind Wind - Average 13 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 25 km/h
    • Snowline Snowline 14108 ft
    13:00 Partly cloudy 22° Partly cloudy
    Feels Like 22°
    Moderate west wind West 17 - 33 km/h
    		UV Index 6 High SPF: 15-25
    • Rain Rain 20% 0 mm
    • Humidity Humidity 64%
    • Dew Point Dew Point 15 °C
    • Clouds Clouds 84%
    • Feels Like Feels Like 22 °C
    • Visibility Visibility 35 km
    • Wind Wind - Average 17 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 33 km/h
    • Snowline Snowline 14436 ft
    Overcast 14:00 Overcast 22° Overcast
    Feels Like 24°
    Moderate west wind West 16 - 33 km/h
    		UV Index 4 Moderate SPF: 6-10
    14:00 Light rain with cloudy skies 70% 0.7 mm 22° Light rain
    Feels Like 24°
    Moderate west wind West 16 - 33 km/h
    		UV Index 4 Moderate SPF: 6-10
    • Rain Rain 20% 0 mm
    • Humidity Humidity 63%
    • Dew Point Dew Point 15 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 24 °C
    • Visibility Visibility 14 km
    • Wind Wind - Average 16 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 33 km/h
    • Snowline Snowline 14436 ft
    15:00 Light rain with cloudy skies 70% 0.028 mm 21° Light rain
    Feels Like 21°
    Moderate southwest wind Southwest 12 - 32 km/h
    		UV Index 3 Moderate SPF: 6-10
    • Rain Rain 70% 0.028 mm
    • Humidity Humidity 77%
    • Dew Point Dew Point 17 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 21 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 12 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 32 km/h
    • Snowline Snowline 14108 ft
    16:00 Light rain with partly cloudy skies 70% 0.028 mm 20° Light rain
    Feels Like 20°
    Moderate southwest wind Southwest 8 - 24 km/h
    		UV Index 3 Moderate SPF: 6-10
    • Rain Rain 70% 0.028 mm
    • Humidity Humidity 84%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 75%
    • Feels Like Feels Like 20 °C
    • Visibility Visibility 7 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 24 km/h
    • Snowline Snowline 14436 ft
    Light rain 17:00 Light rain with cloudy skies 80% 0.02 mm 21° Light rain
    Feels Like 21°
    Moderate southwest wind Southwest 11 - 23 km/h
    		UV Index 1 Low SPF: no
    17:00 Light rain with cloudy skies 90% 1.6 mm 21° Light rain
    Feels Like 21°
    Moderate southwest wind Southwest 11 - 23 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 80% 0.02 mm
    • Humidity Humidity 83%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 21 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 11 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 23 km/h
    • Snowline Snowline 14436 ft
    18:00 Light rain with cloudy skies 90% 0.016 mm 21° Light rain
    Feels Like 21°
    Moderate southwest wind Southwest 11 - 22 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 90% 0.016 mm
    • Humidity Humidity 86%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 21 °C
    • Visibility Visibility 8 km
    • Wind Wind - Average 11 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 22 km/h
    • Snowline Snowline 14436 ft
    19:00 Light rain with cloudy skies 80% 0.016 mm 20° Light rain
    Feels Like 20°
    Moderate southwest wind Southwest 7 - 20 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 80% 0.016 mm
    • Humidity Humidity 90%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 20 °C
    • Visibility Visibility 6 km
    • Wind Wind - Average 7 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 20 km/h
    • Snowline Snowline 14764 ft
    Light rain 20:00 Light rain with partly cloudy skies 80% 0.02 mm 19° Light rain
    Feels Like 19°
    Gentle south wind South 6 - 12 km/h
    		UV Index 0 Low SPF: no
    20:00 Light rain with cloudy skies 80% 1.1 mm 19° Light rain
    Feels Like 19°
    Gentle south wind South 6 - 12 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 80% 0.02 mm
    • Humidity Humidity 93%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 94%
    • Feels Like Feels Like 19 °C
    • Visibility Visibility 5 km
    • Wind Wind - Average 6 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 12 km/h
    • Snowline Snowline 14436 ft
    21:00 Light rain with cloudy skies 60% 0.008 mm 19° Light rain
    Feels Like 19°
    Gentle southeast wind Southeast 7 - 11 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 60% 0.008 mm
    • Humidity Humidity 95%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 19 °C
    • Visibility Visibility 18 km
    • Wind Wind - Average 7 km/h
    • Pressure Pressure 1017 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 11 km/h
    • Snowline Snowline 14764 ft
    22:00 Overcast 19° Overcast
    Feels Like 19°
    Gentle southeast wind Southeast 9 - 14 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 19 °C
    • Visibility Visibility 20 km
    • Wind Wind - Average 9 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 14 km/h
    • Snowline Snowline 14764 ft
    Overcast 23:00 Overcast 18° Overcast
    Feels Like 18°
    Gentle southeast wind Southeast 8 - 14 km/h
    		UV Index 0 Low SPF: no
    23:00 Overcast 18° Overcast
    Feels Like 18°
    Gentle southeast wind Southeast 8 - 14 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 18 °C
    • Visibility Visibility 20 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 14 km/h
    • Snowline Snowline 14436 ft
    24:00 Overcast 18° Overcast
    Feels Like 18°
    Gentle southeast wind Southeast 8 - 14 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 96%
    • Dew Point Dew Point 18 °C
    • Clouds Clouds 100%
    • Feels Like Feels Like 18 °C
    • Visibility Visibility 9 km
    • Wind Wind - Average 8 km/h
    • Pressure Pressure 1018 hPa
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 14 km/h
    • Snowline Snowline 14436 ft

    Air quality in St. Marys today

    Detail
    42
    Moderate O₃ (105 µg/m³)

    Sunrise and Sunset

    Sunrise 06:46 Sunset 20:02
    First light 06:17 Midday 13:25 Last light 20:32
    Day length 13h 16m

    Time remaining until sunrise 1h 7m

    Lunar calendar

    Mon Tue Wed Thu Fri Sat Sun
    30 Last Quarter
    31 Last Quarter
    1 Last Quarter
    2 Last Quarter
    3 Last Quarter
    4 Last Quarter
    5 Last Quarter
    6 Last Quarter
    7 Last Quarter
    8 Last Quarter
    9 New Moon
    10 New Moon
    11 New Moon
    12 New Moon

    What is the weather like in St. Marys, ON in August?

    • Avg. Temp.
      Avg. Temp.: 20 °C Max.: 25 °C Min: 15 °C
    • Rainy Days
      Rainy Days: 12 days
    • Accumulated Rainfall
      Accumulated Rainfall: 90 mm
    • Average Wind Speed
      Average Wind Speed: 10 km/h

    Weather graphs

    Videos

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