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Weather in St. Thomas

Ontario, 232 m · continuously updated

–^°C

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Wind: –
Humidity: –
Rain ahead: –
Sunset: –

Temperature · last 4 and next 28 hours

St. Thomas weather: the next 24 hours

Updated hourly.

St. Thomas 14-day forecast

Two-week trend.

Rain radar

Sun and golden hours

Sunrise –, golden light until –

Sunset –, golden light from –

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Air quality

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European index, measured continuously.

UV index

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Daily maximum — protection advised from 3.

Freezing level

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Snow settles about 300 m below it.

Around St. Thomas

Neighbouring towns, as the crow flies.

Aylmer (Ontario)16 km London24 km Dorchester25 km Ingersoll38 km Tillsonburg38 km Strathroy41 km St. Marys53 km Woodstock (Ontario)53 km

7-day forecast for St. Thomas

Today (Thursday 15 Oct) in St. Thomas: overcast, 11 to 14 °C, precipitation 0.0 mm (35 %), wind up to 18 km/h. Tomorrow: rain, 6 to 19 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	overcast	11 °C	14 °C	0.0 mm	18 km/h
Tomorrow	rain	6 °C	19 °C	5.8 mm	32 km/h
Sat 17 Oct	overcast	1 °C	10 °C	0.0 mm	25 km/h
Sun 18 Oct	sunny	4 °C	15 °C	0.0 mm	28 km/h
Mon 19 Oct	overcast	7 °C	19 °C	0.0 mm	22 km/h
Tue 20 Oct	overcast	9 °C	19 °C	0.0 mm	12 km/h
Wed 21 Oct	overcast	7 °C	17 °C	0.0 mm	14 km/h

Forecast updated on 15.10.2026 at 11:44 (Open-Meteo model, elevation 232 m). The live block at the top of the page is refreshed hourly and covers 14 days.

Tomorrow's weather in St. Thomas

Tomorrow, Friday 16 Oct, in St. Thomas: rain, from 6 to 19 °C, 5.8 mm of precipitation (probability 66 %), wind up to 32 km/h.

Hour	Weather	Temp.	Precip.	Chance	Wind
00:00	light drizzle	12 °C	0.4 mm	37 %	17 km/h
03:00	fog	15 °C	0.0 mm	52 %	14 km/h
06:00	overcast	19 °C	0.0 mm	20 %	23 km/h
09:00	overcast	16 °C	0.0 mm	45 %	30 km/h
12:00	overcast	14 °C	0.0 mm	9 %	27 km/h
15:00	overcast	11 °C	0.0 mm	14 %	23 km/h
18:00	overcast	9 °C	0.0 mm	11 %	25 km/h
21:00	sunny	6 °C	0.0 mm	2 %	20 km/h

Frequently asked questions

Will it rain tomorrow in St. Thomas?

Yes: 5.8 mm expected, probability 66 %.

How warm will it be tomorrow in St. Thomas?

Between 6 and 19 °C.

The weekend

This weekend in St. Thomas: Saturday overcast, 1 to 10 °C, Sunday sunny, 4 to 15 °C.

Day	Weather	Min	Max	Precip.	Wind
Sat 17 Oct	overcast	1 °C	10 °C	0.0 mm	25 km/h
Sun 18 Oct	sunny	4 °C	15 °C	0.0 mm	28 km/h

Hour by hour

The next 48 hours in St. Thomas, hour by hour: temperature from 1 to 19 °C, 5.8 mm of rain expected.

Hour	Weather	Temp.	Precip.	Chance	Wind
11:00	overcast	12 °C	0.0 mm	0 %	15 km/h
12:00	overcast	12 °C	0.0 mm	0 %	18 km/h
13:00	partly cloudy	13 °C	0.0 mm	0 %	16 km/h
14:00	partly cloudy	14 °C	0.0 mm	0 %	16 km/h
15:00	partly cloudy	14 °C	0.0 mm	1 %	17 km/h
16:00	overcast	14 °C	0.0 mm	1 %	17 km/h
17:00	overcast	13 °C	0.0 mm	1 %	14 km/h
18:00	overcast	13 °C	0.0 mm	4 %	13 km/h
19:00	overcast	13 °C	0.0 mm	8 %	12 km/h
20:00	overcast	12 °C	0.0 mm	15 %	12 km/h
21:00	overcast	12 °C	0.0 mm	21 %	17 km/h
22:00	overcast	12 °C	0.0 mm	35 %	17 km/h
23:00	overcast	12 °C	0.0 mm	32 %	18 km/h
00:00	light drizzle	12 °C	0.4 mm	37 %	17 km/h
01:00	rain	11 °C	4.3 mm	63 %	16 km/h
02:00	heavy drizzle	13 °C	1.1 mm	66 %	15 km/h
03:00	fog	15 °C	0.0 mm	52 %	14 km/h
04:00	fog	18 °C	0.0 mm	35 %	24 km/h
05:00	overcast	19 °C	0.0 mm	20 %	25 km/h
06:00	overcast	19 °C	0.0 mm	20 %	23 km/h
07:00	overcast	19 °C	0.0 mm	36 %	27 km/h
08:00	overcast	18 °C	0.0 mm	35 %	32 km/h
09:00	overcast	16 °C	0.0 mm	45 %	30 km/h
10:00	overcast	15 °C	0.0 mm	25 %	27 km/h
11:00	overcast	15 °C	0.0 mm	17 %	28 km/h
12:00	overcast	14 °C	0.0 mm	9 %	27 km/h
13:00	overcast	14 °C	0.0 mm	10 %	25 km/h
14:00	overcast	12 °C	0.0 mm	13 %	19 km/h
15:00	overcast	11 °C	0.0 mm	14 %	23 km/h
16:00	overcast	11 °C	0.0 mm	11 %	24 km/h
17:00	overcast	10 °C	0.0 mm	10 %	24 km/h
18:00	overcast	9 °C	0.0 mm	11 %	25 km/h
19:00	sunny	8 °C	0.0 mm	6 %	20 km/h
20:00	overcast	7 °C	0.0 mm	2 %	20 km/h
21:00	sunny	6 °C	0.0 mm	2 %	20 km/h
22:00	overcast	6 °C	0.0 mm	2 %	21 km/h
23:00	overcast	6 °C	0.0 mm	1 %	25 km/h
00:00	mostly sunny	4 °C	0.0 mm	1 %	25 km/h
01:00	sunny	4 °C	0.0 mm	1 %	21 km/h
02:00	overcast	3 °C	0.0 mm	1 %	22 km/h
03:00	overcast	2 °C	0.0 mm	1 %	20 km/h
04:00	sunny	2 °C	0.0 mm	1 %	15 km/h
05:00	mostly sunny	2 °C	0.0 mm	1 %	17 km/h
06:00	overcast	2 °C	0.0 mm	1 %	18 km/h
07:00	mostly sunny	2 °C	0.0 mm	1 %	17 km/h
08:00	sunny	1 °C	0.0 mm	1 %	15 km/h
09:00	sunny	3 °C	0.0 mm	0 %	17 km/h
10:00	sunny	5 °C	0.0 mm	0 %	20 km/h

Location of St. Thomas

St. Thomas lies at 232 m, 28 m above the average of the 187 places we cover in Ontario (204 m). That makes it the 70th highest of the 187. The main town, Toronto, lies 178 km to the north-east. The nearest places we cover are Aylmer, Ontario (16 km to the east), London (24 km to the north), Dorchester (25 km to the north) and Ingersoll (38 km to the north-east). With about 38,909 inhabitants according to GeoNames, St. Thomas is the 60th largest of the 187 places we cover in Ontario.