S
M
T
W
T
F
S
28
91°
78°
29
93°
77°
30
94°
78°
1
92°
76°
2
92°
77°
3
93°
78°
4
92°
76°
5
91°
77°
6
92°
74°
7
86°
74°
8
87°
75°
9
88°
77°
10
89°
77°
11
89°
76°
12
90°
77°
13
89°
77°
14
89°
76°
15
90°
77°
16
91°
77°
17
92°
76°
18
91°
77°
19
92°
78°
20
91°
77°
21
89°
76°
22
89°
77°
23
91°
77°
24
92°
76°
25
90°
78°
26
91°
78°
27
92°
77°
28
92°
78°
29
93°
78°
30
92°
77°
31
91°
78°
1
93°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Port Arthur
Port Arthur's July 2026 forecast shows daily high temperatures ranging from 86° to 94°, with overnight lows between 74° and 78°. The average high for July is 91° with an average low of 77°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Port Arthur. See also: August | September | October.
