Ystradgynlais (Powys) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 11° Celsius;
Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 11° Celsius; -
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 10° Celsius;
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 10° Celsius; -
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 7° Celsius;
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 7° Celsius; -
Maximum daytime temperature: 13° Celsius; Minimum nighttime temperature: 7° Celsius;
Maximum daytime temperature: 13° Celsius; Minimum nighttime temperature: 7° Celsius;
-
Maximum daytime temperature: 12° Celsius; Minimum nighttime temperature: 7° Celsius;
Maximum daytime temperature: 12° Celsius; Minimum nighttime temperature: 7° Celsius;
-
Maximum daytime temperature: 12° Celsius; Minimum nighttime temperature: 6° Celsius;
Maximum daytime temperature: 12° Celsius; Minimum nighttime temperature: 6° Celsius; -
Maximum daytime temperature: 11° Celsius; Minimum nighttime temperature: 5° Celsius;
Maximum daytime temperature: 11° Celsius; Minimum nighttime temperature: 5° Celsius;
Heavy rain changing to sunny intervals in the afternoon.
Sunrise:
Sunset:
L UV
L Pollution
No pollen data.
7 day forecast for Ystradgynlais
Today (19 October 2025)
| 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 |
50%
|
70%
|
80%
|
80%
|
90%
|
≥95%
|
≥95%
|
≥95%
|
≥95%
|
≥95%
|
≥95%
|
≥95%
|
≥95%
|
80%
|
50%
|
30%
|
30%
|
30%
|
40%
|
50%
|
60%
|
70%
|
50%
|
| Temperature |
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
13°
|
13°
|
14°
|
14°
|
14°
|
15°
|
15°
|
14°
|
14°
|
14°
|
14°
|
13°
|
13°
|
13°
|
12°
|
12°
|
13°
|
| Feels like temperature (°C) |
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
11°
|
11°
|
12°
|
12°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
12°
|
12°
|
12°
|
11°
|
11°
|
| Wind direction and speed |
ESE
10
|
ESE
10
|
ESE
10
|
ESE
11
|
ESE
11
|
SE
11
|
SE
11
|
SE
11
|
SE
12
|
SSE
12
|
SSE
12
|
SSE
12
|
S
11
|
SW
9
|
SW
7
|
SW
7
|
SW
6
|
SW
5
|
SW
5
|
SSW
5
|
SSW
5
|
S
6
|
S
7
|
| Wind gust (mph) |
27
|
29
|
31
|
33
|
33
|
32
|
32
|
31
|
32
|
32
|
30
|
28
|
27
|
20
|
17
|
15
|
13
|
11
|
9
|
10
|
13
|
18
|
22
|
| Visibility |
VG
|
VG
|
VG
|
G
|
M
|
M
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
M
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
88%
|
87%
|
87%
|
90%
|
93%
|
95%
|
96%
|
96%
|
96%
|
96%
|
96%
|
97%
|
97%
|
97%
|
95%
|
92%
|
90%
|
92%
|
93%
|
94%
|
93%
|
94%
|
94%
|
| UV | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - |
Monday (20 October 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 |
60%
|
70%
|
90%
|
90%
|
≥95%
|
≥95%
|
≥95%
|
90%
|
≥95%
|
≥95%
|
≥95%
|
≥95%
|
≥95%
|
≥95%
|
90%
|
90%
|
90%
|
80%
|
80%
|
80%
|
80%
|
80%
|
80%
|
60%
|
| Temperature (°C) |
13°
|
13°
|
13°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
12°
|
12°
|
12°
|
12°
|
12°
|
| Feels like temperature (°C) |
11°
|
11°
|
11°
|
11°
|
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
| Wind direction and speed (mph) |
S
8
|
S
9
|
S
10
|
S
10
|
S
10
|
S
11
|
S
11
|
S
11
|
S
11
|
S
11
|
S
11
|
S
11
|
S
11
|
SSW
11
|
WSW
11
|
W
12
|
W
12
|
W
12
|
W
12
|
W
11
|
W
11
|
W
10
|
W
10
|
W
10
|
| Wind gust (mph) |
25
|
26
|
27
|
28
|
29
|
30
|
30
|
29
|
30
|
30
|
30
|
30
|
28
|
27
|
24
|
26
|
28
|
28
|
28
|
27
|
26
|
26
|
27
|
27
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
G
|
M
|
M
|
G
|
VG
|
VG
|
G
|
G
|
G
|
VG
|
VG
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
| Humidity |
94%
|
93%
|
92%
|
93%
|
93%
|
94%
|
95%
|
95%
|
94%
|
93%
|
93%
|
94%
|
94%
|
92%
|
92%
|
90%
|
90%
|
91%
|
91%
|
92%
|
93%
|
93%
|
93%
|
93%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - |
Tuesday (21 October 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 |
60%
|
50%
|
40%
|
50%
|
60%
|
60%
|
60%
|
70%
|
70%
|
60%
|
60%
|
60%
|
70%
|
70%
|
70%
|
60%
|
60%
|
60%
|
60%
|
50%
|
50%
|
40%
|
30%
|
30%
|
| Temperature (°C) |
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
12°
|
12°
|
13°
|
13°
|
13°
|
13°
|
13°
|
12°
|
12°
|
11°
|
11°
|
11°
|
10°
|
10°
|
| Feels like temperature (°C) |
10°
|
10°
|
9°
|
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
10°
|
10°
|
10°
|
9°
|
9°
|
9°
|
| Wind direction and speed (mph) |
W
9
|
W
9
|
W
8
|
W
7
|
W
6
|
WSW
5
|
WSW
5
|
WSW
5
|
WSW
6
|
W
7
|
W
8
|
W
9
|
W
10
|
W
10
|
W
10
|
W
10
|
W
10
|
W
9
|
W
8
|
W
7
|
W
6
|
W
6
|
W
5
|
W
5
|
| Wind gust (mph) |
25
|
24
|
21
|
16
|
13
|
12
|
12
|
13
|
15
|
19
|
22
|
24
|
26
|
28
|
29
|
28
|
25
|
23
|
20
|
18
|
15
|
13
|
11
|
9
|
| Visibility (description) |
E
|
E
|
E
|
E
|
E
|
E
|
VG
|
VG
|
VG
|
VG
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
| Humidity |
92%
|
92%
|
92%
|
93%
|
93%
|
93%
|
94%
|
94%
|
95%
|
94%
|
92%
|
88%
|
87%
|
85%
|
83%
|
81%
|
80%
|
84%
|
87%
|
89%
|
90%
|
90%
|
91%
|
91%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | - | - | - | - | - |
Wednesday (22 October 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 |
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
20%
|
30%
|
30%
|
40%
|
40%
|
40%
|
40%
|
50%
|
60%
|
70%
|
70%
|
80%
|
70%
|
70%
|
70%
|
70%
|
60%
|
70%
|
| Temperature (°C) |
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
10°
|
11°
|
11°
|
12°
|
12°
|
12°
|
12°
|
11°
|
11°
|
11°
|
11°
|
11°
|
10°
|
10°
|
| Feels like temperature (°C) |
8°
|
8°
|
8°
|
8°
|
8°
|
8°
|
8°
|
8°
|
8°
|
9°
|
9°
|
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
9°
|
9°
|
9°
|
8°
|
8°
|
7°
|
| Wind direction and speed (mph) |
W
5
|
W
4
|
WNW
4
|
NW
4
|
NW
3
|
N
3
|
NE
3
|
ENE
3
|
ENE
3
|
ENE
3
|
E
4
|
ESE
5
|
SE
6
|
SE
7
|
SE
7
|
SE
8
|
SE
9
|
SE
9
|
ESE
9
|
SSE
9
|
SSW
10
|
SSW
11
|
WSW
11
|
WSW
11
|
| Wind gust (mph) |
8
|
8
|
7
|
7
|
6
|
5
|
5
|
5
|
5
|
7
|
10
|
14
|
15
|
17
|
18
|
16
|
15
|
15
|
17
|
15
|
16
|
17
|
17
|
21
|
| Visibility (description) |
E
|
E
|
E
|
E
|
E
|
E
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
M
|
M
|
M
|
G
|
G
|
VG
|
| Humidity |
91%
|
92%
|
92%
|
92%
|
92%
|
92%
|
93%
|
92%
|
92%
|
92%
|
89%
|
88%
|
86%
|
84%
|
86%
|
86%
|
88%
|
91%
|
94%
|
95%
|
95%
|
95%
|
94%
|
92%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - |
Thursday (23 October 2025)
| Time |
00:00
|
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
| Chance of precipitation |
70%
|
80%
|
80%
|
80%
|
80%
|
70%
|
50%
|
40%
|
30%
|
| Temperature (°C) |
10°
|
9°
|
9°
|
9°
|
9°
|
11°
|
11°
|
10°
|
9°
|
| Feels like temperature (°C) |
7°
|
7°
|
6°
|
6°
|
7°
|
8°
|
8°
|
7°
|
7°
|
| Wind direction and speed (mph) |
WSW
10
|
WSW
10
|
WSW
9
|
WSW
10
|
WSW
12
|
W
14
|
W
14
|
W
11
|
W
10
|
| Wind gust (mph) |
21
|
20
|
21
|
23
|
23
|
28
|
26
|
21
|
18
|
| Visibility (description) |
VG
|
E
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
92%
|
91%
|
90%
|
91%
|
88%
|
81%
|
81%
|
85%
|
87%
|
| UV | - | - | - | 1 | 1 | 2 | 1 | - | - |
Friday (24 October 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
40%
|
40%
|
50%
|
50%
|
50%
|
30%
|
30%
|
30%
|
| Temperature (°C) |
9°
|
9°
|
8°
|
10°
|
11°
|
11°
|
9°
|
9°
|
| Feels like temperature (°C) |
6°
|
6°
|
6°
|
7°
|
9°
|
9°
|
7°
|
7°
|
| Wind direction and speed (mph) |
W
10
|
W
9
|
W
9
|
WNW
9
|
WNW
11
|
NW
11
|
NW
8
|
NNW
6
|
| Wind gust (mph) |
11
|
13
|
12
|
22
|
22
|
16
|
15
|
11
|
| Visibility (description) |
G
|
G
|
G
|
VG
|
G
|
VG
|
VG
|
VG
|
| Humidity |
87%
|
89%
|
90%
|
87%
|
80%
|
78%
|
85%
|
87%
|
| UV | - | - | 1 | 1 | 2 | 1 | - | - |
Saturday (25 October 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
30%
|
40%
|
40%
|
40%
|
40%
|
40%
|
40%
|
30%
|
| Temperature (°C) |
8°
|
7°
|
7°
|
8°
|
10°
|
9°
|
8°
|
7°
|
| Feels like temperature (°C) |
6°
|
6°
|
5°
|
6°
|
8°
|
7°
|
6°
|
6°
|
| Wind direction and speed (mph) |
NNW
6
|
NNW
5
|
NW
5
|
NW
6
|
NW
10
|
NW
9
|
WNW
6
|
WNW
5
|
| Wind gust (mph) |
10
|
9
|
11
|
21
|
21
|
18
|
11
|
7
|
| Visibility (description) |
VG
|
VG
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
88%
|
89%
|
89%
|
84%
|
72%
|
75%
|
87%
|
89%
|
| UV | - | - | 1 | 1 | 2 | 1 | - | - |
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Wales weather forecast
Headline:
Wet and windy, but turning drier later.
This Evening and Tonight:
South-easterly winds freshening this evening with showery outbreaks of rain moving eastwards. Turning increasingly wet and windy overnight with some heavy and persistent rain by dawn. Coastal gales possible at times. Mild. Minimum temperature 10 °C.
Sunday:
A wet and windy morning with the heaviest rain easing by early afternoon. Turning brighter from the west, though quickly followed by showers, which may turn heavy. Winds easing. Maximum temperature 16 °C.
Outlook for Monday to Wednesday:
Windy on Monday with heavy and blustery showers and sunny spells. Fewer showers on Tuesday but staying changeable on Wednesday with further wet and windy weather possible. Temperatures around average.
Updated: