S
M
T
W
T
F
S
30
83°
49°
31
82°
49°
1
83°
50°
2
80°
49°
3
81°
51°
4
85°
46°
5
79°
46°
6
80°
49°
7
81°
49°
8
78°
47°
9
79°
44°
10
78°
48°
11
79°
41°
12
78°
43°
13
78°
43°
14
79°
45°
15
77°
43°
16
77°
43°
17
76°
40°
18
75°
41°
19
78°
42°
20
76°
42°
21
75°
38°
22
75°
40°
23
80°
47°
24
71°
37°
25
70°
38°
26
Hist. Avg.
74°
40°
27
Hist. Avg.
74°
40°
28
Hist. Avg.
73°
40°
29
Hist. Avg.
73°
39°
30
Hist. Avg.
72°
39°
1
Hist. Avg.
72°
38°
2
Hist. Avg.
72°
38°
3
Hist. Avg.
71°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Berthoud
Berthoud's September 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 37° and 51°. The average high for September is 78° with an average low of 44°. 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 Berthoud. See also: October | November | December.
