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St. Thomas, Ontario

66°F
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St. Thomas

Ontario

66°
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St. Thomas, Ontario Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

June

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

S
M
T
W
T
F
S
31
Rain
64°
52°
1
Partly sunny
62°
51°
2
Clouds and sun
63°
50°
3
Partly sunny
68°
56°
4
Partial sunshine
68°
54°
5
Sunny
69°
57°
6
Cloudy and humid
73°
58°
7
Morning rain, then t-storms
72°
59°
8
Morning rain, then t-storms
72°
60°
9
A little rain in the morning
73°
60°
10
A shower and thunderstorm
74°
58°
11
Mostly cloudy and less humid
74°
56°
12
Partly sunny and humid
73°
60°
13
A little morning rain
74°
58°
14
Not as warm with rain
66°
58°
15
Plenty of sun
76°
62°
16
Mostly sunny and warm
77°
63°
17
Warm with sunny intervals
77°
63°
18
Partly sunny, warm and humid
79°
57°
19
An afternoon t-storm or two
80°
56°
20
Mostly sunny
75°
53°
21
Morning rain; mostly cloudy
70°
62°
22
Partly sunny
74°
56°
23
Showers around in the morning
76°
51°
24
Partly sunny and less humid
70°
58°
25
Mostly cloudy, afternoon rain
72°
60°
26
A few afternoon showers
71°
59°
27
Rain in the morning; clouds
73°
58°
28
Partly sunny
74°
55°
29
Partly sunny
75°
56°
30
Partly sunny
77°
54°
1
Plenty of sunshine
75°
61°
2
Plenty of sunshine
77°
61°
3
A shower and thunderstorm
74°
54°
4
Rather cloudy
71°
54°

Temperature Graph

°F
80° 72° 64° 56° 48° Jun
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

June Weather in St. Thomas

St. Thomas's June 2026 forecast shows daily high temperatures ranging from 62° to 80°, with overnight lows between 50° and 63°. The average high for June is 73° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in St. Thomas. See also: July | August | September.

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World North America Canada Ontario St. Thomas

Weather Near St. Thomas:

  • Cleveland, OH
  • Hamilton, Ontario
  • London, Ontario
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