Current Conditions
St. Thomas, Ontario
Wind
SE 7 mph11 km/h
Humidity
64%
Cloud Cover
96%
As of Tuesday, September 8, 2026 at 4:13 PM EDT
Today's Outlook
Day
Overcast and warm, with a high of 74°F23°C. Breezy from the SSE at 7 mph11 km/h.
Night
Overcast, with a low around 69°F20°C. Breezy from the ESE at 7 to 8 mph12 to 13 km/h.
7-Day Forecast
| Day | Condition | High (°F) | Low (°F) | Precip (mm) | Cloud Cover (%) | Wind (mph) | |
|---|---|---|---|---|---|---|---|
| Cloudy | High 74°F23°C | Low 69°F20°C | Precip 0 in0 mm— | Cloud 95% | Wind SE 7 mph11 km/h | Tuesday: Overcast and warm, with a high of 74°F23°C. Breezy from the SSE at 7 mph11 km/h. Tuesday Night: Overcast, with a low around 69°F20°C. Breezy from the ESE at 7 to 8 mph12 to 13 km/h. | |
| Light Rain | High 76°F24°C | Low 70°F21°C | Precip 0.21 in5.3 mm79% | Cloud 84% | Wind SW 10 mph17 km/h | Wednesday: Overcast and warm, with a high of 76°F24°C. Breezy from the SW at 11 to 13 mph18 to 20 km/h. 79% chance of light rain throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the SW at 10 to 11 mph16 to 18 km/h. 45% chance of light rain before dawn. | |
| Partly Cloudy | High 72°F22°C | Low 59°F15°C | Precip 0 in0 mm— | Cloud 64% | Wind NW 8 mph13 km/h | Thursday: Overcast and warm, with a high of 72°F22°C and morning low of 66°F19°C. Breezy from the NW at 8 to 10 mph13 to 16 km/h. Thursday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the NW at 8 to 10 mph13 to 17 km/h. | |
| Clear | High 72°F22°C | Low 54°F12°C | Precip 0 in0 mm— | Cloud 16% | Wind SE 4 mph7 km/h | Friday: Mostly clear and warm, with a high of 72°F22°C and morning low of 55°F13°C. Light wind from the SSW around 4 mph6 km/h. Friday Night: Mostly clear, with a low around 54°F12°C. Light wind from the ESE around 5 mph8 km/h. | |
| Drizzle | High 76°F25°C | Low 60°F15°C | Precip 0.04 in0.9 mm19% | Cloud 48% | Wind S 8 mph12 km/h | Saturday: Partly cloudy and warm, with a high of 76°F25°C and morning low of 62°F17°C. Breezy from the S at 8 to 9 mph13 to 15 km/h. Saturday Night: Mostly cloudy, with a low around 60°F15°C. Breezy from the SSE at 7 mph11 km/h. 19% chance of drizzle in the evening. | |
| Drizzle | High 74°F23°C | Low 61°F16°C | Precip 0.07 in1.7 mm21% | Cloud 42% | Wind NW 8 mph13 km/h | Sunday: Partly cloudy and warm, with a high of 74°F23°C and morning low of 66°F19°C. Breezy from the NW at 9 to 11 mph14 to 18 km/h. 16% chance of drizzle throughout the day. Sunday Night: Partly cloudy, with a low around 61°F16°C. Breezy from the NW at 8 mph13 km/h. 21% chance of drizzle throughout the night. | |
| Partly Cloudy | High 70°F21°C | Low 57°F14°C | Precip 0.02 in0.5 mm5% | Cloud 51% | Wind NE 8 mph13 km/h | Monday: Mostly cloudy and warm, with a high of 70°F21°C and morning low of 57°F14°C. Breezy from the NNE at 8 mph12 km/h. Monday Night: Partly cloudy, with a low around 57°F14°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h. |
15-Day Forecast
| Day | High | Low | Precip | Cloud Cover | Condition | Wind | |
|---|---|---|---|---|---|---|---|
| TuesdaySep 8 | 74°F23°C | 69°F20°C | 0 in0 mm· — | 95% | Cloudy | SE 7 mph11 km/h | |
DayOvercast and warm, with a high of 74°F23°C. Breezy from the SSE at 7 mph11 km/h. NightOvercast, with a low around 69°F20°C. Breezy from the ESE at 7 to 8 mph12 to 13 km/h. | |||||||
| WednesdaySep 9 | 76°F24°C | 70°F21°C | 0.21 in5.3 mm· 79% | 84% | Light Rain | SW 10 mph17 km/h | |
DayOvercast and warm, with a high of 76°F24°C. Breezy from the SW at 11 to 13 mph18 to 20 km/h. 79% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SW at 10 to 11 mph16 to 18 km/h. 45% chance of light rain before dawn. | |||||||
| ThursdaySep 10 | 72°F22°C | 59°F15°C | 0 in0 mm· — | 64% | Partly Cloudy | NW 8 mph13 km/h | |
DayOvercast and warm, with a high of 72°F22°C and morning low of 66°F19°C. Breezy from the NW at 8 to 10 mph13 to 16 km/h. NightPartly cloudy, with a low around 59°F15°C. Breezy from the NW at 8 to 10 mph13 to 17 km/h. | |||||||
| FridaySep 11 | 72°F22°C | 54°F12°C | 0 in0 mm· — | 16% | Clear | SE 4 mph7 km/h | |
DayMostly clear and warm, with a high of 72°F22°C and morning low of 55°F13°C. Light wind from the SSW around 4 mph6 km/h. NightMostly clear, with a low around 54°F12°C. Light wind from the ESE around 5 mph8 km/h. | |||||||
| SaturdaySep 12 | 76°F25°C | 60°F15°C | 0.04 in0.9 mm· 19% | 48% | Drizzle | S 8 mph12 km/h | |
DayPartly cloudy and warm, with a high of 76°F25°C and morning low of 62°F17°C. Breezy from the S at 8 to 9 mph13 to 15 km/h. NightMostly cloudy, with a low around 60°F15°C. Breezy from the SSE at 7 mph11 km/h. 19% chance of drizzle in the evening. | |||||||
| SundaySep 13 | 74°F23°C | 61°F16°C | 0.07 in1.7 mm· 21% | 42% | Drizzle | NW 8 mph13 km/h | |
DayPartly cloudy and warm, with a high of 74°F23°C and morning low of 66°F19°C. Breezy from the NW at 9 to 11 mph14 to 18 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 61°F16°C. Breezy from the NW at 8 mph13 km/h. 21% chance of drizzle throughout the night. | |||||||
| MondaySep 14 | 70°F21°C | 57°F14°C | 0.02 in0.5 mm· 5% | 51% | Partly Cloudy | NE 8 mph13 km/h | |
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 57°F14°C. Breezy from the NNE at 8 mph12 km/h. NightPartly cloudy, with a low around 57°F14°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h. | |||||||
| TuesdaySep 15 | 75°F24°C | 63°F17°C | 0.09 in2.4 mm· 20% | 63% | Showers | SSW 11 mph18 km/h | |
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the SSW at 12 to 13 mph19 to 21 km/h. 17% chance of drizzle throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the S at 10 to 11 mph16 to 17 km/h. 20% chance of showers throughout the night. | |||||||
| WednesdaySep 16 | 74°F23°C | 64°F18°C | 0.13 in3.3 mm· 29% | 63% | Showers | WSW 8 mph12 km/h | |
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 64°F18°C. Breezy from the WSW at 7 to 8 mph12 to 12 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 29% chance of showers throughout the night. | |||||||
| ThursdaySep 17 | 75°F24°C | 63°F17°C | 0.18 in4.5 mm· 24% | 56% | Showers | S 8 mph14 km/h | |
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 64°F18°C. Breezy from the S at 9 mph14 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the SSE at 8 to 9 mph13 to 14 km/h. 21% chance of showers throughout the night. | |||||||
| FridaySep 18 | 73°F23°C | 64°F18°C | 0.19 in4.9 mm· 25% | 59% | Showers | W 10 mph16 km/h | |
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 65°F18°C. Breezy from the W at 10 to 11 mph17 to 18 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the W at 10 mph15 km/h. 25% chance of showers throughout the night. | |||||||
| SaturdaySep 19 | 69°F20°C | 60°F16°C | 0.13 in3.2 mm· 21% | 59% | Showers | W 10 mph15 km/h | |
DayMostly cloudy and warm, with a high of 69°F20°C and morning low of 60°F16°C. Breezy from the W at 10 mph16 km/h. 21% chance of drizzle throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the WNW at 9 to 10 mph15 to 16 km/h. 17% chance of showers throughout the night. | |||||||
| SundaySep 20 | 66°F19°C | 57°F14°C | 0.17 in4.3 mm· 22% | 61% | Showers | NW 10 mph16 km/h | |
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 57°F14°C. Breezy from the WNW at 10 mph16 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 58°F14°C. Breezy from the NW at 9 to 10 mph15 to 15 km/h. 22% chance of showers throughout the night. | |||||||
| MondaySep 21 | 64°F18°C | 54°F12°C | 0.09 in2.4 mm· 19% | 58% | Drizzle | N 9 mph15 km/h | |
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 54°F12°C. Breezy from the N at 9 to 10 mph15 to 16 km/h. 17% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 55°F13°C. Breezy from the N at 9 mph14 km/h. 19% chance of drizzle throughout the night. | |||||||
| TuesdaySep 22 | 65°F18°C | 53°F12°C | 0.11 in2.9 mm· 19% | 59% | Drizzle | E 9 mph14 km/h | |
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 54°F12°C. Breezy from the SSE at 9 to 10 mph15 to 16 km/h. 19% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 53°F12°C. Breezy from the ENE at 8 to 9 mph14 to 14 km/h. 17% chance of drizzle throughout the night. | |||||||
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About This Forecast
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Coordinates: 42.7736°N, 81.1804°W·Elevation: 232m·Timezone: America/Toronto·Population: 38,909