St. Thomas, ON Weather

    02:00 Thursday
    Scattered clouds
    Scattered clouds
    0° Feels like -5°
    New Moon New Moon Illuminated: 2%
    • Today 18 Dec. Light rain with partly cloudy skies 90% 3.7 mm 6° / -1° Strong south wind 32 - 58 km/h
    • Tomorrow 19 Dec. Snow with cloudy skies 90% 8.8 mm 6° / -5° Strong west wind 34 - 63 km/h
    • Saturday 20 Dec. Snow with partly cloudy skies 40% 0.1 mm 2° / -8° Moderate south wind 25 - 48 km/h
    • Sunday 21 Dec. Partly cloudy 1° / -9° Strong west wind 29 - 57 km/h
    • Monday 22 Dec. Partly cloudy -2° / -12° Moderate west wind 17 - 38 km/h
    • Tuesday 23 Dec. Rain and snow with cloudy skies 70% 1.6 mm 3° / -3° Moderate south wind 18 - 34 km/h
    • Wednesday 24 Dec. Partly cloudy 4° / -4° Moderate west wind 12 - 28 km/h

    Weather Forecast for St. Thomas, ON Today

    , 18 December

    Tomorrow

    , 19 December
    03:00 Scattered clouds 0° Scattered clouds
    Feels Like -5°
    Moderate south wind South 22 - 36 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 93%
    • Dew Point Dew Point -1 °C
    • Clouds Clouds 13%
    • Snow depth Snow depth 5.91 in
    • Feels Like Feels Like -5 °C
    • Wind Wind - Average 22 km/h
    • Pressure Pressure 1018 hPa
    • Snowline Snowline 8530 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 36 km/h
    • Visibility Visibility 30 km
    04:00 Scattered clouds 0° Scattered clouds
    Feels Like -5°
    Moderate south wind South 27 - 45 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 89%
    • Dew Point Dew Point -1 °C
    • Clouds Clouds 50%
    • Snow depth Snow depth 5.91 in
    • Feels Like Feels Like -5 °C
    • Wind Wind - Average 27 km/h
    • Pressure Pressure 1016 hPa
    • Snowline Snowline 8858 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 45 km/h
    • Visibility Visibility 35 km
    05:00 Scattered clouds 1° Scattered clouds
    Feels Like -4°
    Moderate south wind South 23 - 44 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 86%
    • Dew Point Dew Point -1 °C
    • Clouds Clouds 46%
    • Snow depth Snow depth 5.91 in
    • Feels Like Feels Like -4 °C
    • Wind Wind - Average 23 km/h
    • Pressure Pressure 1015 hPa
    • Snowline Snowline 8858 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 44 km/h
    • Visibility Visibility 40 km
    06:00 Scattered clouds 1° Scattered clouds
    Feels Like -4°
    Moderate south wind South 22 - 39 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 86%
    • Dew Point Dew Point -1 °C
    • Clouds Clouds 50%
    • Snow depth Snow depth 5.91 in
    • Feels Like Feels Like -4 °C
    • Wind Wind - Average 22 km/h
    • Pressure Pressure 1015 hPa
    • Snowline Snowline 8530 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 39 km/h
    • Visibility Visibility 40 km
    07:00 Scattered clouds 1° Scattered clouds
    Feels Like -4°
    Moderate south wind South 24 - 40 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 86%
    • Dew Point Dew Point -1 °C
    • Clouds Clouds 50%
    • Snow depth Snow depth 5.51 in
    • Feels Like Feels Like -4 °C
    • Wind Wind - Average 24 km/h
    • Pressure Pressure 1014 hPa
    • Snowline Snowline 8530 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 40 km/h
    • Visibility Visibility 40 km
    Partly cloudy 08:00 Partly cloudy 2° Partly cloudy
    Feels Like -3°
    Moderate south wind South 25 - 42 km/h
    		UV Index 0 Low SPF: no
    08:00 Overcast 2° Overcast
    Feels Like -3°
    Moderate south wind South 25 - 42 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 85%
    • Dew Point Dew Point -1 °C
    • Clouds Clouds 65%
    • Snow depth Snow depth 5.51 in
    • Feels Like Feels Like -3 °C
    • Wind Wind - Average 25 km/h
    • Pressure Pressure 1013 hPa
    • Snowline Snowline 8530 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 42 km/h
    • Visibility Visibility 40 km
    09:00 Overcast 2° Overcast
    Feels Like -3°
    Moderate south wind South 25 - 43 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 84%
    • Dew Point Dew Point 0 °C
    • Clouds Clouds 100%
    • Snow depth Snow depth 5.51 in
    • Feels Like Feels Like -3 °C
    • Wind Wind - Average 25 km/h
    • Pressure Pressure 1012 hPa
    • Snowline Snowline 7874 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 43 km/h
    • Visibility Visibility 40 km
    10:00 Overcast 3° Overcast
    Feels Like -2°
    Moderate south wind South 24 - 42 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 82%
    • Dew Point Dew Point 0 °C
    • Clouds Clouds 100%
    • Snow depth Snow depth 5.51 in
    • Feels Like Feels Like -2 °C
    • Wind Wind - Average 24 km/h
    • Pressure Pressure 1012 hPa
    • Snowline Snowline 8202 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 42 km/h
    • Visibility Visibility 45 km
    Overcast 11:00 Overcast 3° Overcast
    Feels Like -1°
    Moderate south wind South 23 - 41 km/h
    		UV Index 1 Low SPF: no
    11:00 Overcast 3° Overcast
    Feels Like -1°
    Moderate south wind South 23 - 41 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 79%
    • Dew Point Dew Point 0 °C
    • Clouds Clouds 100%
    • Snow depth Snow depth 5.51 in
    • Feels Like Feels Like -1 °C
    • Wind Wind - Average 23 km/h
    • Pressure Pressure 1011 hPa
    • Snowline Snowline 7874 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 41 km/h
    • Visibility Visibility 45 km
    12:00 Partly cloudy 4° Partly cloudy
    Feels Like -1°
    Moderate south wind South 26 - 43 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 76%
    • Dew Point Dew Point 0 °C
    • Clouds Clouds 83%
    • Snow depth Snow depth 5.12 in
    • Feels Like Feels Like -1 °C
    • Wind Wind - Average 26 km/h
    • Pressure Pressure 1009 hPa
    • Snowline Snowline 7874 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 43 km/h
    • Visibility Visibility 45 km
    13:00 Scattered clouds 4° Scattered clouds
    Feels Like 0°
    Moderate south wind South 26 - 44 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 73%
    • Dew Point Dew Point 0 °C
    • Clouds Clouds 44%
    • Snow depth Snow depth 4.72 in
    • Feels Like Feels Like 0 °C
    • Wind Wind - Average 26 km/h
    • Pressure Pressure 1008 hPa
    • Snowline Snowline 7874 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 44 km/h
    • Visibility Visibility 50 km
    Scattered clouds 14:00 Scattered clouds 4° Scattered clouds
    Feels Like 0°
    Moderate south wind South 24 - 44 km/h
    		UV Index 1 Low SPF: no
    14:00 Partly cloudy 4° Partly cloudy
    Feels Like 0°
    Moderate south wind South 24 - 44 km/h
    		UV Index 1 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 74%
    • Dew Point Dew Point 0 °C
    • Clouds Clouds 46%
    • Snow depth Snow depth 4.72 in
    • Feels Like Feels Like 0 °C
    • Wind Wind - Average 24 km/h
    • Pressure Pressure 1007 hPa
    • Snowline Snowline 7874 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 44 km/h
    • Visibility Visibility 45 km
    15:00 Partly cloudy 4° Partly cloudy
    Feels Like 0°
    Moderate south wind South 24 - 41 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 0% 0 mm
    • Humidity Humidity 75%
    • Dew Point Dew Point 0 °C
    • Clouds Clouds 70%
    • Snow depth Snow depth 4.33 in
    • Feels Like Feels Like 0 °C
    • Wind Wind - Average 24 km/h
    • Pressure Pressure 1006 hPa
    • Snowline Snowline 8202 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 41 km/h
    • Visibility Visibility 45 km
    16:00 Scattered clouds 5° Scattered clouds
    Feels Like 0°
    Moderate south wind South 24 - 42 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 10% 0 mm
    • Humidity Humidity 77%
    • Dew Point Dew Point 1 °C
    • Clouds Clouds 35%
    • Snow depth Snow depth 4.33 in
    • Feels Like Feels Like 0 °C
    • Wind Wind - Average 24 km/h
    • Pressure Pressure 1005 hPa
    • Snowline Snowline 8530 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 42 km/h
    • Visibility Visibility 45 km
    Scattered clouds 17:00 Scattered clouds 5° Scattered clouds
    Feels Like 0°
    Moderate south wind South 25 - 43 km/h
    		UV Index 0 Low SPF: no
    17:00 Overcast 5° Overcast
    Feels Like 0°
    Moderate south wind South 25 - 43 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 10% 0 mm
    • Humidity Humidity 80%
    • Dew Point Dew Point 1 °C
    • Clouds Clouds 49%
    • Snow depth Snow depth 3.94 in
    • Feels Like Feels Like 0 °C
    • Wind Wind - Average 25 km/h
    • Pressure Pressure 1004 hPa
    • Snowline Snowline 8858 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 43 km/h
    • Visibility Visibility 45 km
    18:00 Overcast 5° Overcast
    Feels Like 1°
    Moderate south wind South 24 - 43 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 80%
    • Dew Point Dew Point 1 °C
    • Clouds Clouds 97%
    • Snow depth Snow depth 3.94 in
    • Feels Like Feels Like 1 °C
    • Wind Wind - Average 24 km/h
    • Pressure Pressure 1003 hPa
    • Snowline Snowline 8858 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 43 km/h
    • Visibility Visibility 45 km
    19:00 Overcast 5° Overcast
    Feels Like 1°
    Moderate south wind South 25 - 43 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 82%
    • Dew Point Dew Point 2 °C
    • Clouds Clouds 99%
    • Snow depth Snow depth 3.54 in
    • Feels Like Feels Like 1 °C
    • Wind Wind - Average 25 km/h
    • Pressure Pressure 1001 hPa
    • Snowline Snowline 8530 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 43 km/h
    • Visibility Visibility 45 km
    Overcast 20:00 Overcast 5° Overcast
    Feels Like 1°
    Moderate south wind South 27 - 45 km/h
    		UV Index 0 Low SPF: no
    20:00 Light rain with cloudy skies 70% 0.2 mm 5° Light rain
    Feels Like 1°
    Moderate south wind South 27 - 45 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 20% 0 mm
    • Humidity Humidity 84%
    • Dew Point Dew Point 3 °C
    • Clouds Clouds 100%
    • Snow depth Snow depth 3.15 in
    • Feels Like Feels Like 1 °C
    • Wind Wind - Average 27 km/h
    • Pressure Pressure 1000 hPa
    • Snowline Snowline 7874 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 45 km/h
    • Visibility Visibility 40 km
    21:00 Light rain with cloudy skies 70% 0.008 mm 6° Light rain
    Feels Like 1°
    Strong south wind South 30 - 51 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 70% 0.008 mm
    • Humidity Humidity 86%
    • Dew Point Dew Point 3 °C
    • Clouds Clouds 100%
    • Snow depth Snow depth 2.76 in
    • Feels Like Feels Like 1 °C
    • Wind Wind - Average 30 km/h
    • Pressure Pressure 998 hPa
    • Snowline Snowline 7874 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 51 km/h
    • Visibility Visibility 5 km
    22:00 Light rain with cloudy skies 90% 0.031 mm 5° Light rain
    Feels Like 1°
    Strong south wind South 31 - 53 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.031 mm
    • Humidity Humidity 92%
    • Dew Point Dew Point 4 °C
    • Clouds Clouds 100%
    • Snow depth Snow depth 2.36 in
    • Feels Like Feels Like 1 °C
    • Wind Wind - Average 31 km/h
    • Pressure Pressure 996 hPa
    • Snowline Snowline 7874 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 53 km/h
    • Visibility Visibility 3 km
    Light rain 23:00 Light rain with cloudy skies 90% 0.035 mm 6° Light rain
    Feels Like 1°
    Strong south wind South 32 - 56 km/h
    		UV Index 0 Low SPF: no
    23:00 Light rain with cloudy skies 90% 3.5 mm 6° Light rain
    Feels Like 1°
    Strong south wind South 32 - 56 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.035 mm
    • Humidity Humidity 94%
    • Dew Point Dew Point 5 °C
    • Clouds Clouds 100%
    • Snow depth Snow depth 2.36 in
    • Feels Like Feels Like 1 °C
    • Wind Wind - Average 32 km/h
    • Pressure Pressure 994 hPa
    • Snowline Snowline 7218 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 56 km/h
    • Visibility Visibility 8 km
    24:00 Light rain with cloudy skies 90% 0.071 mm 6° Light rain
    Feels Like 1°
    Strong south wind South 31 - 58 km/h
    		UV Index 0 Low SPF: no
    • Rain Rain 90% 0.071 mm
    • Humidity Humidity 94%
    • Dew Point Dew Point 5 °C
    • Clouds Clouds 100%
    • Snow depth Snow depth 1.97 in
    • Feels Like Feels Like 1 °C
    • Wind Wind - Average 31 km/h
    • Pressure Pressure 992 hPa
    • Snowline Snowline 6890 ft
    • Fog Fog No
    • Wind - Gusts Wind - Gusts 58 km/h
    • Visibility Visibility 2 km

    Sunrise and Sunset

    Sunrise 07:50 Sunset 16:52
    First light 07:18 Midday 12:21 Last light 17:24
    Day length 9h 2m

    Time remaining until sunrise 5h 7m

    Lunar calendar

    Mon Tue Wed Thu Fri Sat Sun
    18 New Moon
    19 New Moon
    20 New Moon
    21 New Moon
    22 First Quarter
    23 First Quarter
    24 First Quarter
    25 First Quarter
    26 First Quarter
    27 First Quarter
    28 First Quarter
    29 First Quarter
    30 First Quarter
    31 First Quarter

    Air quality in St. Thomas today

    Detail
    36
    Fair O₃ (89 µg/m³)
    • Little health risk.
    • Sensitive people should consider reducing prolonged or intense outdoor activities if they experience symptoms.

    Weather graphs
    Maximum Minimum Rainfall

    Videos

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