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Oldcastle, Ontario

37°F
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Oldcastle

Ontario

37°
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Oldcastle, Ontario Weather
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Today WinterCast Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

April

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
29
53°
33°
30
72°
43°
31
75°
41°
1
41°
33°
2
Rain and a thunderstorm
62°
57°
3
Chance of a morning shower
72°
42°
4
Heavy rain and a thunderstorm
69°
38°
5
Cloudy, breezy and cooler
43°
31°
6
A morning shower in places
47°
30°
7
Partly sunny and colder
38°
26°
8
Plenty of sun
52°
42°
9
Times of clouds and sun
58°
40°
10
Cloudy
54°
42°
11
Cloudy with afternoon rain
61°
45°
12
Periods of rain
62°
44°
13
Mostly cloudy
59°
41°
14
Partial sunshine
57°
39°
15
Rather cloudy
58°
49°
16
Partly sunny
53°
34°
17
Sunshine and a few clouds
49°
33°
18
Sunshine and a few clouds
51°
42°
19
Clouds yielding to sun
60°
46°
20
Mostly cloudy
64°
47°
21
Cloudy
66°
48°
22
Mostly cloudy
66°
48°
23
Mostly cloudy
65°
49°
24
Times of sun and clouds
67°
49°
25
Cloudy
68°
47°
26
A little afternoon rain
66°
38°
27
A few afternoon showers
54°
37°
28
Turning cloudy
53°
40°
29
Cloudy
58°
45°
30
Sun, then clouds
56°
43°
1
Partly sunny
57°
43°
2
Increasing cloudiness
59°
44°

Temperature Graph

°F
80° 68° 56° 44° 32° Apr
Today 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

April Weather in Oldcastle

Oldcastle's April 2026 forecast shows daily high temperatures ranging from 38° to 72°, with overnight lows between 26° and 57°. The average high for April is 58° with an average low of 42°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Oldcastle. See also: May | June | July.

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Weather Near Oldcastle:

  • Detroit, MI
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