S
M
T
W
T
F
S
28
80°
59°
29
78°
60°
30
79°
56°
1
81°
55°
2
83°
57°
3
82°
57°
4
87°
58°
5
89°
63°
6
92°
62°
7
92°
61°
8
90°
61°
9
90°
60°
10
91°
64°
11
88°
60°
12
93°
66°
13
93°
66°
14
92°
66°
15
93°
67°
16
90°
67°
17
85°
66°
18
93°
67°
19
94°
67°
20
95°
66°
21
93°
67°
22
93°
67°
23
88°
63°
24
85°
63°
25
85°
59°
26
84°
61°
27
93°
67°
28
94°
66°
29
93°
68°
30
94°
68°
31
94°
67°
1
91°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Umatilla
Umatilla's July 2026 forecast shows daily high temperatures ranging from 78° to 95°, with overnight lows between 55° and 68°. The average high for July is 89° with an average low of 63°. 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 Umatilla. See also: August | September | October.