S
M
T
W
T
F
S
30
68°
52°
31
68°
54°
1
69°
54°
2
67°
53°
3
66°
54°
4
66°
54°
5
65°
51°
6
67°
51°
7
64°
50°
8
64°
54°
9
63°
48°
10
64°
52°
11
62°
50°
12
63°
53°
13
64°
54°
14
65°
55°
15
64°
54°
16
66°
52°
17
65°
53°
18
Hist. Avg.
60°
48°
19
Hist. Avg.
60°
48°
20
Hist. Avg.
60°
48°
21
Hist. Avg.
60°
48°
22
Hist. Avg.
60°
48°
23
Hist. Avg.
59°
48°
24
Hist. Avg.
59°
48°
25
Hist. Avg.
59°
47°
26
Hist. Avg.
59°
47°
27
Hist. Avg.
59°
47°
28
Hist. Avg.
58°
47°
29
Hist. Avg.
58°
47°
30
Hist. Avg.
58°
47°
1
Hist. Avg.
58°
47°
2
Hist. Avg.
58°
46°
3
Hist. Avg.
58°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Donaghadee
Donaghadee's September 2026 forecast shows daily high temperatures ranging from 62° to 69°, with overnight lows between 48° and 55°. The average high for September is 65° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Donaghadee. See also: October | November | December.
