S
M
T
W
T
F
S
26
81°
60°
27
72°
54°
28
73°
55°
29
75°
56°
30
77°
56°
31
76°
55°
1
77°
57°
2
75°
56°
3
74°
56°
4
77°
55°
5
76°
56°
6
77°
56°
7
78°
57°
8
76°
56°
9
75°
54°
10
74°
54°
11
77°
57°
12
77°
57°
13
76°
56°
14
78°
57°
15
78°
57°
16
77°
56°
17
77°
56°
18
76°
55°
19
76°
56°
20
75°
56°
21
76°
55°
22
76°
53°
23
75°
54°
24
71°
54°
25
71°
50°
26
70°
51°
27
70°
50°
28
71°
51°
29
70°
54°
30
69°
54°
31
71°
49°
1
70°
48°
2
69°
52°
3
69°
47°
4
74°
46°
5
69°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Upminster
Upminster's August 2026 forecast shows daily high temperatures ranging from 69° to 81°, with overnight lows between 46° and 60°. The average high for August is 74° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Upminster. See also: September | October | November.
