Great Falls (United States of America) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 9° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 9° Celsius; -
Maximum daytime temperature: 23° Celsius; Minimum nighttime temperature: 9° Celsius;
Maximum daytime temperature: 23° Celsius; Minimum nighttime temperature: 9° Celsius;
-
Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 8° Celsius;
Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 8° Celsius;
-
Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 9° Celsius;
Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 9° Celsius;
-
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 15° Celsius;
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 15° Celsius;
-
Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 11° Celsius;
Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 11° Celsius;
-
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 10° Celsius;
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 10° Celsius;
Sunny intervals.
Sunrise:
Sunset:
H UV
No pollution data.
No pollen data.
7 day forecast for Great Falls
Today (16 September 2025)
| Time |
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols |  |
|
 |
|
|
|
|
|
|
 |
|
|
|
|
| Chance of precipitation |
20%
|
20%
|
40%
|
10%
|
20%
|
30%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature |
15°
|
16°
|
17°
|
18°
|
19°
|
20°
|
21°
|
21°
|
21°
|
20°
|
17°
|
16°
|
15°
|
14°
|
| Feels like temperature (°C) |
15°
|
16°
|
17°
|
18°
|
19°
|
20°
|
20°
|
20°
|
20°
|
20°
|
17°
|
16°
|
15°
|
14°
|
| Wind direction and speed |
W
4
|
WNW
3
|
WNW
3
|
NW
3
|
NNW
3
|
N
3
|
NE
3
|
ENE
3
|
E
3
|
ESE
3
|
SE
4
|
SE
4
|
SSE
3
|
S
3
|
| Wind gust (mph) |
10
|
11
|
12
|
11
|
12
|
13
|
12
|
11
|
9
|
7
|
6
|
6
|
5
|
5
|
| Visibility |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
83%
|
77%
|
68%
|
63%
|
58%
|
53%
|
48%
|
46%
|
44%
|
59%
|
71%
|
75%
|
80%
|
85%
|
| UV | 2 | 4 | 4 | 5 | 5 | 4 | 3 | 1 | 1 | - | - | - | - | - |
Wednesday (17 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
13°
|
13°
|
12°
|
12°
|
11°
|
11°
|
10°
|
10°
|
11°
|
13°
|
16°
|
19°
|
20°
|
22°
|
22°
|
23°
|
23°
|
23°
|
23°
|
21°
|
19°
|
17°
|
16°
|
15°
|
| Feels like temperature (°C) |
13°
|
12°
|
12°
|
11°
|
10°
|
10°
|
9°
|
9°
|
10°
|
13°
|
16°
|
18°
|
20°
|
21°
|
22°
|
23°
|
23°
|
23°
|
23°
|
21°
|
18°
|
17°
|
16°
|
15°
|
| Wind direction and speed (mph) |
S
3
|
S
3
|
S
3
|
S
4
|
S
5
|
S
5
|
S
4
|
S
4
|
S
3
|
S
3
|
S
3
|
S
3
|
SSW
3
|
SSW
3
|
SSW
3
|
SSW
2
|
SSW
2
|
SSE
2
|
ESE
2
|
E
4
|
E
5
|
E
5
|
E
4
|
ESE
4
|
| Wind gust (mph) |
6
|
6
|
7
|
8
|
8
|
8
|
8
|
8
|
8
|
8
|
10
|
13
|
13
|
12
|
12
|
9
|
8
|
8
|
8
|
8
|
8
|
8
|
8
|
7
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
86%
|
87%
|
87%
|
88%
|
88%
|
91%
|
91%
|
92%
|
85%
|
74%
|
64%
|
54%
|
42%
|
40%
|
40%
|
38%
|
35%
|
32%
|
33%
|
52%
|
55%
|
58%
|
65%
|
70%
|
| UV | - | - | - | - | - | - | - | - | 1 | 2 | 3 | 5 | 6 | 6 | 5 | 4 | 3 | 1 | 1 | - | - | - | - | - |
Thursday (18 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
14°
|
12°
|
11°
|
11°
|
10°
|
10°
|
9°
|
9°
|
10°
|
13°
|
15°
|
18°
|
20°
|
22°
|
23°
|
24°
|
24°
|
24°
|
24°
|
22°
|
20°
|
18°
|
17°
|
15°
|
| Feels like temperature (°C) |
13°
|
12°
|
11°
|
11°
|
10°
|
9°
|
9°
|
8°
|
10°
|
12°
|
15°
|
17°
|
19°
|
21°
|
22°
|
23°
|
23°
|
23°
|
23°
|
21°
|
18°
|
17°
|
16°
|
15°
|
| Wind direction and speed (mph) |
ESE
3
|
SE
3
|
SSE
3
|
SSE
3
|
S
4
|
S
4
|
S
4
|
S
4
|
SSW
3
|
SSW
3
|
SW
1
|
WSW
2
|
SSW
2
|
WSW
3
|
WSW
3
|
WSW
3
|
WSW
4
|
ESE
4
|
E
4
|
E
6
|
E
6
|
E
6
|
E
6
|
E
4
|
| Wind gust (mph) |
6
|
6
|
6
|
7
|
7
|
7
|
7
|
6
|
6
|
7
|
6
|
6
|
8
|
12
|
13
|
14
|
13
|
13
|
11
|
12
|
12
|
12
|
10
|
8
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
77%
|
83%
|
84%
|
84%
|
84%
|
85%
|
88%
|
89%
|
79%
|
68%
|
58%
|
50%
|
42%
|
38%
|
32%
|
22%
|
22%
|
22%
|
22%
|
41%
|
44%
|
44%
|
53%
|
63%
|
| UV | - | - | - | - | - | - | - | - | 1 | 2 | 3 | 5 | 6 | 6 | 5 | 4 | 3 | 1 | 1 | - | - | - | - | - |
Friday (19 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
14°
|
12°
|
11°
|
11°
|
10°
|
10°
|
9°
|
9°
|
10°
|
12°
|
14°
|
17°
|
19°
|
22°
|
23°
|
25°
|
25°
|
25°
|
25°
|
22°
|
19°
|
18°
|
17°
|
15°
|
| Feels like temperature (°C) |
13°
|
12°
|
11°
|
11°
|
10°
|
9°
|
9°
|
8°
|
10°
|
12°
|
14°
|
17°
|
19°
|
21°
|
22°
|
24°
|
24°
|
24°
|
24°
|
21°
|
18°
|
17°
|
16°
|
15°
|
| Wind direction and speed (mph) |
E
3
|
SE
3
|
SSE
3
|
S
3
|
SSW
4
|
SSW
4
|
SSW
3
|
SSW
4
|
SSW
3
|
SW
3
|
WSW
2
|
W
2
|
WNW
2
|
N
3
|
NNE
3
|
NNW
3
|
WNW
3
|
WNW
3
|
ENE
3
|
ENE
5
|
ENE
6
|
E
5
|
E
4
|
E
4
|
| Wind gust (mph) |
6
|
6
|
5
|
7
|
7
|
6
|
7
|
7
|
7
|
7
|
8
|
8
|
7
|
10
|
11
|
12
|
12
|
10
|
10
|
11
|
10
|
10
|
8
|
7
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
74%
|
81%
|
83%
|
84%
|
82%
|
82%
|
84%
|
86%
|
75%
|
66%
|
58%
|
48%
|
42%
|
38%
|
33%
|
24%
|
22%
|
21%
|
22%
|
42%
|
45%
|
50%
|
61%
|
66%
|
| UV | - | - | - | - | - | - | - | - | 1 | 2 | 3 | 5 | 6 | 6 | 5 | 4 | 2 | 1 | 1 | - | - | - | - | - |
Saturday (20 September 2025)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
14°
|
14°
|
13°
|
12°
|
11°
|
11°
|
10°
|
10°
|
11°
|
14°
|
17°
|
20°
|
23°
|
25°
|
26°
|
26°
|
27°
|
27°
|
26°
|
19°
|
| Feels like temperature (°C) |
14°
|
13°
|
12°
|
11°
|
11°
|
10°
|
9°
|
9°
|
11°
|
13°
|
16°
|
19°
|
21°
|
22°
|
23°
|
24°
|
24°
|
24°
|
23°
|
17°
|
| Wind direction and speed (mph) |
SSE
3
|
SSW
3
|
SSW
4
|
SSW
5
|
SSW
5
|
SSW
5
|
SSW
4
|
SSW
4
|
SSW
4
|
SW
4
|
SW
4
|
SW
5
|
WSW
8
|
WSW
8
|
WSW
9
|
WSW
9
|
WSW
9
|
WSW
9
|
WSW
10
|
WSW
8
|
| Wind gust (mph) |
7
|
7
|
8
|
8
|
8
|
8
|
8
|
8
|
9
|
10
|
13
|
20
|
21
|
22
|
24
|
25
|
22
|
22
|
19
|
17
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
72%
|
74%
|
73%
|
71%
|
75%
|
78%
|
80%
|
81%
|
73%
|
61%
|
50%
|
40%
|
28%
|
24%
|
22%
|
21%
|
21%
|
21%
|
21%
|
39%
|
| UV | - | - | - | - | - | - | - | - | 1 | 2 | 3 | 4 | 6 | 6 | 5 | 4 | 2 | 1 | 1 | - |
Sunday (21 September 2025)
| Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
17°
|
16°
|
16°
|
18°
|
23°
|
25°
|
24°
|
18°
|
| Feels like temperature (°C) |
15°
|
14°
|
13°
|
15°
|
18°
|
21°
|
20°
|
16°
|
| Wind direction and speed (mph) |
SW
8
|
SW
10
|
SW
10
|
SW
11
|
WSW
16
|
WSW
13
|
W
13
|
W
8
|
| Wind gust (mph) |
19
|
20
|
22
|
34
|
35
|
31
|
27
|
16
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
44%
|
47%
|
44%
|
39%
|
23%
|
21%
|
21%
|
40%
|
| UV | - | - | - | 2 | 5 | 4 | 1 | - |
Monday (22 September 2025)
| Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
15°
|
13°
|
11°
|
16°
|
23°
|
26°
|
26°
|
19°
|
| Feels like temperature (°C) |
13°
|
11°
|
10°
|
14°
|
19°
|
23°
|
23°
|
17°
|
| Wind direction and speed (mph) |
SW
7
|
SW
7
|
SSW
7
|
SSW
6
|
WSW
12
|
WSW
11
|
SW
10
|
SSW
6
|
| Wind gust (mph) |
15
|
12
|
14
|
26
|
28
|
26
|
19
|
10
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
49%
|
57%
|
57%
|
45%
|
24%
|
21%
|
20%
|
45%
|
| UV | - | - | - | 2 | 5 | 4 | 1 | - |
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Forecast for 10:00 (UTC-6), Tue
Updated 13:28 (UTC+1) on Tue 16 Sep 2025
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