S
M
T
W
T
F
S
28
80°
60°
29
84°
62°
30
83°
60°
1
82°
61°
2
83°
63°
3
83°
64°
4
82°
64°
5
83°
61°
6
83°
61°
7
84°
63°
8
84°
63°
9
83°
62°
10
84°
66°
11
87°
63°
12
86°
62°
13
85°
63°
14
86°
66°
15
87°
64°
16
85°
64°
17
85°
62°
18
Hist. Avg.
91°
70°
19
Hist. Avg.
92°
70°
20
Hist. Avg.
92°
70°
21
Hist. Avg.
92°
70°
22
Hist. Avg.
92°
70°
23
Hist. Avg.
92°
70°
24
Hist. Avg.
92°
69°
25
Hist. Avg.
92°
69°
26
Hist. Avg.
92°
69°
27
Hist. Avg.
92°
69°
28
Hist. Avg.
92°
69°
29
Hist. Avg.
92°
69°
30
Hist. Avg.
92°
69°
31
Hist. Avg.
92°
69°
1
Hist. Avg.
92°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in Siena
Siena's July 2026 forecast shows daily high temperatures ranging from 80° to 87°, with overnight lows between 60° and 66°. The average high for July is 84° 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 Siena. See also: August | September | October.
