Cadair Idris (Gwynedd) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 8° Celsius; Minimum nighttime temperature: 5° Celsius;
Maximum daytime temperature: 8 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius; -
Maximum daytime temperature: 11° Celsius; Minimum nighttime temperature: 8° Celsius;
Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius; -
Maximum daytime temperature: 12° Celsius; Minimum nighttime temperature: 6° Celsius;
Maximum daytime temperature: 12 degrees Celsius; Minimum nighttime temperature: 6 degrees Celsius; -
Maximum daytime temperature: 8° Celsius; Minimum nighttime temperature: 4° Celsius;
Maximum daytime temperature: 8 degrees Celsius; Minimum nighttime temperature: 4 degrees Celsius;
-
Maximum daytime temperature: 11° Celsius; Minimum nighttime temperature: 6° Celsius;
Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 6 degrees Celsius;
-
Maximum daytime temperature: 11° Celsius; Minimum nighttime temperature: 5° Celsius;
Maximum daytime temperature: 11 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius;
-
Maximum daytime temperature: 10° Celsius; Minimum nighttime temperature: 5° Celsius;
Maximum daytime temperature: 10 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius;
Sunny intervals.
Sunrise:
Sunset:
M UV
L Pollution
No pollen data.
7 day forecast for Cadair Idris
Today (20 September 2026)
| Time |
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%
|
20%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature |
6°
|
6°
|
6°
|
6°
|
6°
|
5°
|
5°
|
5°
|
5°
|
5°
|
6°
|
6°
|
7°
|
7°
|
7°
|
7°
|
7°
|
7°
|
5°
|
5°
|
5°
|
5°
|
5°
|
| Feels like temperature (°C) |
2°
|
1°
|
1°
|
1°
|
1°
|
1°
|
0°
|
0°
|
1°
|
1°
|
2°
|
2°
|
3°
|
3°
|
4°
|
4°
|
3°
|
3°
|
3°
|
2°
|
2°
|
2°
|
2°
|
| Wind direction and speed |
W
17
|
W
18
|
W
18
|
W
19
|
W
18
|
WNW
17
|
WNW
16
|
WNW
15
|
WNW
15
|
WNW
14
|
WNW
14
|
WNW
14
|
WNW
13
|
WNW
13
|
WNW
11
|
WNW
11
|
WNW
11
|
WNW
10
|
WSW
8
|
SW
7
|
SSW
7
|
SSW
8
|
S
9
|
| Wind gust (mph) |
25
|
25
|
25
|
26
|
26
|
24
|
22
|
22
|
23
|
22
|
19
|
19
|
19
|
19
|
17
|
17
|
14
|
11
|
8
|
8
|
8
|
8
|
10
|
| Visibility |
G
|
M
|
M
|
M
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
84%
|
84%
|
84%
|
84%
|
83%
|
79%
|
77%
|
75%
|
74%
|
68%
|
65%
|
64%
|
62%
|
60%
|
60%
|
63%
|
65%
|
66%
|
82%
|
83%
|
83%
|
83%
|
83%
|
| UV | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | - | - | - | - |
Monday (21 September 2026)
| 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%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
| Temperature (°C) |
5°
|
5°
|
5°
|
5°
|
5°
|
5°
|
5°
|
6°
|
6°
|
7°
|
7°
|
8°
|
8°
|
9°
|
9°
|
9°
|
10°
|
10°
|
10°
|
9°
|
8°
|
9°
|
9°
|
9°
|
| Feels like temperature (°C) |
2°
|
2°
|
2°
|
2°
|
2°
|
2°
|
2°
|
2°
|
3°
|
4°
|
5°
|
5°
|
6°
|
6°
|
7°
|
7°
|
8°
|
8°
|
8°
|
7°
|
6°
|
7°
|
7°
|
7°
|
| Wind direction and speed (mph) |
S
9
|
S
9
|
S
10
|
S
10
|
SSW
10
|
SSW
10
|
SSW
10
|
SW
10
|
SW
9
|
SW
9
|
SW
9
|
SW
10
|
SW
9
|
SW
10
|
SW
10
|
WSW
9
|
WSW
9
|
WSW
7
|
SW
7
|
SW
7
|
SW
7
|
SW
7
|
SW
7
|
SW
8
|
| Wind gust (mph) |
10
|
11
|
13
|
13
|
13
|
12
|
12
|
12
|
13
|
13
|
15
|
15
|
15
|
15
|
14
|
14
|
12
|
11
|
9
|
8
|
8
|
8
|
8
|
8
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
G
|
M
|
M
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
| Humidity |
82%
|
83%
|
82%
|
80%
|
81%
|
79%
|
78%
|
80%
|
80%
|
79%
|
80%
|
81%
|
84%
|
86%
|
87%
|
88%
|
88%
|
89%
|
90%
|
94%
|
95%
|
96%
|
97%
|
98%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | - | - | - | - |
Tuesday (22 September 2026)
| 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 |
10%
|
10%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
| Temperature (°C) |
9°
|
9°
|
8°
|
8°
|
8°
|
8°
|
8°
|
8°
|
8°
|
8°
|
9°
|
9°
|
10°
|
10°
|
11°
|
11°
|
11°
|
11°
|
11°
|
8°
|
8°
|
8°
|
8°
|
8°
|
| Feels like temperature (°C) |
7°
|
6°
|
6°
|
5°
|
5°
|
5°
|
5°
|
5°
|
6°
|
6°
|
7°
|
7°
|
7°
|
8°
|
8°
|
9°
|
9°
|
9°
|
9°
|
6°
|
6°
|
6°
|
5°
|
5°
|
| Wind direction and speed (mph) |
SSW
8
|
SSW
9
|
S
9
|
S
10
|
SSW
10
|
S
10
|
SSW
10
|
SSW
10
|
SSW
9
|
SSW
8
|
SSW
9
|
SSW
11
|
SW
11
|
SW
11
|
SW
10
|
WSW
9
|
WSW
9
|
WSW
8
|
WSW
7
|
SW
8
|
SSW
9
|
SSW
9
|
SSW
10
|
SSW
11
|
| Wind gust (mph) |
8
|
10
|
9
|
11
|
11
|
11
|
11
|
11
|
10
|
10
|
12
|
13
|
13
|
13
|
13
|
13
|
11
|
10
|
8
|
8
|
9
|
10
|
11
|
12
|
| Visibility (description) |
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
P
|
M
|
M
|
M
|
G
|
G
|
G
|
M
|
M
|
M
|
M
|
P
|
VP
|
VP
|
| Humidity |
98%
|
97%
|
97%
|
97%
|
97%
|
97%
|
96%
|
96%
|
95%
|
92%
|
89%
|
84%
|
82%
|
79%
|
75%
|
76%
|
76%
|
79%
|
84%
|
91%
|
92%
|
93%
|
93%
|
94%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 3 | 2 | 1 | 1 | 1 | 1 | - | - | - | - |
Wednesday (23 September 2026)
| 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 |
10%
|
10%
|
20%
|
30%
|
40%
|
40%
|
40%
|
40%
|
40%
|
50%
|
40%
|
30%
|
20%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
8°
|
8°
|
8°
|
8°
|
8°
|
7°
|
7°
|
6°
|
6°
|
6°
|
6°
|
6°
|
6°
|
7°
|
7°
|
7°
|
7°
|
6°
|
6°
|
5°
|
5°
|
4°
|
4°
|
5°
|
| Feels like temperature (°C) |
5°
|
5°
|
4°
|
4°
|
4°
|
4°
|
3°
|
3°
|
2°
|
3°
|
2°
|
2°
|
2°
|
2°
|
3°
|
3°
|
3°
|
2°
|
2°
|
1°
|
1°
|
0°
|
0°
|
1°
|
| Wind direction and speed (mph) |
SSW
11
|
SW
11
|
SW
14
|
SW
13
|
SW
14
|
WSW
14
|
WSW
14
|
W
14
|
W
14
|
WNW
14
|
NW
14
|
NW
15
|
NW
15
|
NNW
16
|
NNW
16
|
NNW
17
|
NNW
15
|
NNW
15
|
NNW
14
|
NNW
13
|
N
11
|
NNE
11
|
NE
11
|
ENE
10
|
| Wind gust (mph) |
12
|
13
|
16
|
17
|
18
|
21
|
21
|
21
|
22
|
23
|
25
|
25
|
22
|
23
|
23
|
22
|
20
|
18
|
17
|
15
|
15
|
14
|
13
|
12
|
| Visibility (description) |
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
VP
|
P
|
P
|
M
|
M
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
G
|
| Humidity |
95%
|
95%
|
95%
|
96%
|
97%
|
97%
|
97%
|
96%
|
95%
|
92%
|
90%
|
84%
|
78%
|
71%
|
66%
|
65%
|
64%
|
65%
|
69%
|
76%
|
78%
|
79%
|
82%
|
82%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 3 | 2 | 2 | 1 | 1 | 1 | - | - | - | - |
Thursday (24 September 2026)
| 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%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
| Temperature (°C) |
4°
|
5°
|
4°
|
4°
|
5°
|
5°
|
5°
|
5°
|
5°
|
5°
|
6°
|
7°
|
8°
|
9°
|
9°
|
10°
|
10°
|
10°
|
9°
|
7°
|
7°
|
7°
|
6°
|
6°
|
| Feels like temperature (°C) |
1°
|
1°
|
0°
|
0°
|
0°
|
0°
|
0°
|
0°
|
0°
|
1°
|
2°
|
3°
|
4°
|
5°
|
5°
|
6°
|
7°
|
6°
|
5°
|
3°
|
3°
|
2°
|
2°
|
1°
|
| Wind direction and speed (mph) |
E
11
|
E
11
|
ESE
14
|
ESE
14
|
ESE
15
|
ESE
14
|
SE
14
|
SE
14
|
SE
14
|
SE
13
|
SE
14
|
SSE
14
|
S
14
|
S
16
|
S
18
|
S
18
|
S
17
|
SSW
17
|
SSW
16
|
S
16
|
S
17
|
SSE
17
|
SSE
17
|
SSE
17
|
| Wind gust (mph) |
12
|
12
|
15
|
15
|
16
|
15
|
16
|
17
|
17
|
18
|
21
|
21
|
22
|
22
|
22
|
22
|
21
|
19
|
18
|
18
|
18
|
19
|
19
|
22
|
| Visibility (description) |
G
|
G
|
G
|
G
|
G
|
M
|
M
|
M
|
M
|
M
|
G
|
G
|
M
|
M
|
M
|
M
|
G
|
G
|
M
|
M
|
M
|
M
|
P
|
P
|
| Humidity |
82%
|
83%
|
83%
|
82%
|
82%
|
83%
|
84%
|
85%
|
85%
|
79%
|
76%
|
70%
|
68%
|
66%
|
65%
|
66%
|
68%
|
69%
|
76%
|
84%
|
88%
|
91%
|
92%
|
92%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 3 | 2 | 1 | 1 | 1 | 1 | - | - | - | - |
Friday (25 September 2026)
| Time |
00:00
|
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
| Chance of precipitation | – |
20%
|
30%
|
20%
|
20%
|
10%
|
10%
|
10%
|
20%
|
| Temperature (°C) |
6°
|
6°
|
6°
|
6°
|
7°
|
9°
|
10°
|
7°
|
6°
|
| Feels like temperature (°C) |
1°
|
1°
|
1°
|
1°
|
3°
|
6°
|
7°
|
3°
|
2°
|
| Wind direction and speed (mph) |
SSE
16
|
SSE
17
|
SE
16
|
ESE
16
|
SE
15
|
SSW
17
|
SSW
14
|
SSE
13
|
ESE
14
|
| Wind gust (mph) | – |
19
|
18
|
18
|
16
|
19
|
15
|
15
|
15
|
| Visibility (description) | – |
P
|
VP
|
VP
|
P
|
M
|
M
|
M
|
P
|
| Humidity |
94%
|
95%
|
96%
|
97%
|
85%
|
70%
|
68%
|
87%
|
95%
|
| UV |  |
- | - | 1 | 2 | 4 | 1 | 1 | - |
Saturday (26 September 2026)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
20%
|
10%
|
10%
|
20%
|
20%
|
20%
|
20%
|
20%
|
| Temperature (°C) |
6°
|
5°
|
5°
|
6°
|
8°
|
9°
|
6°
|
6°
|
| Feels like temperature (°C) |
2°
|
1°
|
1°
|
2°
|
4°
|
5°
|
2°
|
1°
|
| Wind direction and speed (mph) |
ENE
14
|
ENE
13
|
ENE
14
|
ESE
16
|
SSE
17
|
S
16
|
SSW
15
|
SE
16
|
| Wind gust (mph) |
15
|
14
|
15
|
17
|
19
|
18
|
17
|
18
|
| Visibility (description) |
P
|
VP
|
VP
|
M
|
M
|
M
|
P
|
P
|
| Humidity |
97%
|
97%
|
96%
|
85%
|
73%
|
74%
|
89%
|
96%
|
| UV | - | - | 1 | 2 | 3 | 1 | 1 | - |
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Wales weather forecast
Headline:
Largely fine on Sunday with lighter winds and some sunshine.
This Evening and Tonight:
Any showery rain in the south soon clearing to leave a fine evening for most. Largely dry overnight with clear periods. Staying quite breezy on northern coasts but winds becoming light elsewhere and turning rather cool in rural inland locations. Minimum temperature 8 °C.
Sunday:
A fine day with a mixture of cloud and sunny spells, with some prolonged periods of sunshine developing in places. Much lighter winds than on Saturday and feeling pleasantly warm. Maximum temperature 19 °C.
Outlook for Monday to Wednesday:
Cloudier on Monday with a little drizzle possible for a time, brighter later. More widely brighter on Tuesday with warm periods of sunshine. Breezier on Wednesday, with some rain possible.
Updated: