Ystrad Mynach (Caerphilly) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 7° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 7° Celsius; -
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 8° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 8° Celsius;
-
Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 8° Celsius;
Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 8° Celsius;
-
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 9° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 9° Celsius;
-
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 9° Celsius;
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 9° Celsius; -
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 8° Celsius;
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 8° Celsius;
-
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 10° Celsius;
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 10° Celsius; -
Maximum daytime temperature: 18° Celsius;
Maximum daytime temperature: 18° Celsius;
8 day forecast for Ystrad Mynach
Today (17 May 2025)
| Time |
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%
|
| Temperature |
8°
|
8°
|
9°
|
11°
|
13°
|
15°
|
16°
|
17°
|
18°
|
19°
|
19°
|
20°
|
20°
|
19°
|
18°
|
14°
|
13°
|
12°
|
| Feels like temperature (°C) |
7°
|
7°
|
8°
|
10°
|
12°
|
13°
|
15°
|
16°
|
17°
|
18°
|
18°
|
19°
|
19°
|
18°
|
17°
|
14°
|
12°
|
12°
|
| Wind direction and speed |
ENE
6
|
ENE
6
|
ENE
7
|
ENE
7
|
ENE
7
|
ENE
7
|
ENE
7
|
E
6
|
E
6
|
E
5
|
ESE
4
|
ESE
4
|
E
4
|
ESE
4
|
WSW
4
|
NE
4
|
NNE
4
|
NNE
4
|
| Wind gust (mph) |
18
|
19
|
19
|
18
|
18
|
18
|
18
|
17
|
15
|
12
|
10
|
9
|
9
|
9
|
8
|
8
|
8
|
10
|
| Visibility |
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
85%
|
83%
|
75%
|
73%
|
65%
|
63%
|
56%
|
54%
|
49%
|
41%
|
40%
|
40%
|
40%
|
44%
|
66%
|
66%
|
65%
|
65%
|
| UV | 1 | 1 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 1 | 1 | 1 | 1 | - | - |
Sunday (18 May 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) |
12°
|
11°
|
11°
|
10°
|
9°
|
8°
|
8°
|
10°
|
12°
|
14°
|
16°
|
17°
|
18°
|
19°
|
20°
|
20°
|
20°
|
20°
|
20°
|
19°
|
17°
|
14°
|
13°
|
13°
|
| Feels like temperature (°C) |
11°
|
10°
|
10°
|
9°
|
8°
|
8°
|
8°
|
10°
|
12°
|
13°
|
15°
|
16°
|
17°
|
18°
|
18°
|
19°
|
19°
|
19°
|
18°
|
18°
|
17°
|
14°
|
13°
|
12°
|
| Wind direction and speed (mph) |
NNE
5
|
NNE
5
|
NNE
5
|
NNE
5
|
NNE
4
|
NNE
4
|
NNE
3
|
NE
3
|
ENE
3
|
ENE
4
|
ENE
4
|
NE
5
|
NE
5
|
NE
5
|
NE
5
|
NE
5
|
ENE
5
|
ENE
5
|
E
5
|
ESE
5
|
SSE
4
|
SW
4
|
N
4
|
ENE
5
|
| Wind gust (mph) |
11
|
11
|
11
|
10
|
9
|
7
|
6
|
7
|
10
|
11
|
11
|
12
|
12
|
13
|
13
|
13
|
13
|
13
|
12
|
12
|
10
|
8
|
9
|
10
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
E
|
E
|
E
|
E
|
E
|
E
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
65%
|
67%
|
72%
|
76%
|
82%
|
84%
|
85%
|
81%
|
74%
|
66%
|
60%
|
53%
|
42%
|
40%
|
40%
|
40%
|
40%
|
41%
|
41%
|
44%
|
61%
|
68%
|
70%
|
63%
|
| UV | - | - | - | - | - | 1 | 1 | 1 | 2 | 3 | 4 | 6 | 6 | 6 | 6 | 5 | 3 | 2 | 1 | 1 | 1 | 1 | - | - |
Monday (19 May 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 |
<5%
|
<5%
|
10%
|
10%
|
<5%
|
20%
|
30%
|
10%
|
<5%
|
| Temperature (°C) |
12°
|
11°
|
9°
|
10°
|
14°
|
18°
|
19°
|
18°
|
13°
|
| Feels like temperature (°C) |
11°
|
10°
|
8°
|
9°
|
13°
|
16°
|
18°
|
17°
|
12°
|
| Wind direction and speed (mph) |
E
5
|
ENE
5
|
ENE
5
|
ENE
5
|
E
8
|
ESE
7
|
E
6
|
NE
6
|
NNE
5
|
| Wind gust (mph) |
10
|
10
|
12
|
21
|
20
|
18
|
15
|
14
|
11
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
E
|
E
|
VG
|
| Humidity |
67%
|
70%
|
82%
|
78%
|
65%
|
43%
|
42%
|
50%
|
62%
|
| UV | - | - | - | 1 | 4 | 6 | 3 | 1 | - |
Tuesday (20 May 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
 |
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
20%
|
30%
|
20%
|
<5%
|
10%
|
| Temperature (°C) |
11°
|
9°
|
10°
|
16°
|
19°
|
20°
|
18°
|
13°
|
| Feels like temperature (°C) |
10°
|
8°
|
10°
|
15°
|
17°
|
18°
|
17°
|
13°
|
| Wind direction and speed (mph) |
NE
5
|
NE
4
|
NE
4
|
ENE
6
|
ENE
6
|
W
5
|
WNW
5
|
NW
4
|
| Wind gust (mph) |
11
|
9
|
14
|
15
|
14
|
12
|
12
|
8
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
E
|
E
|
E
|
VG
|
| Humidity |
66%
|
75%
|
74%
|
54%
|
42%
|
41%
|
51%
|
66%
|
| UV | - | - | 1 | 4 | 6 | 3 | 1 | - |
Wednesday (21 May 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
10%
|
20%
|
20%
|
30%
|
30%
|
30%
|
20%
|
20%
|
| Temperature (°C) |
11°
|
10°
|
11°
|
16°
|
17°
|
18°
|
17°
|
14°
|
| Feels like temperature (°C) |
11°
|
10°
|
11°
|
15°
|
16°
|
16°
|
15°
|
13°
|
| Wind direction and speed (mph) |
NW
3
|
NNW
3
|
W
3
|
WNW
5
|
W
7
|
WNW
8
|
WNW
8
|
NW
6
|
| Wind gust (mph) |
6
|
6
|
10
|
17
|
19
|
18
|
15
|
10
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
69%
|
75%
|
73%
|
55%
|
51%
|
50%
|
53%
|
71%
|
| UV | - | - | 1 | 4 | 4 | 3 | 1 | - |
Thursday (22 May 2025)
| 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%
|
10%
|
20%
|
20%
|
20%
|
20%
|
| Temperature (°C) |
12°
|
10°
|
11°
|
15°
|
18°
|
18°
|
17°
|
14°
|
| Feels like temperature (°C) |
11°
|
9°
|
10°
|
14°
|
16°
|
16°
|
15°
|
13°
|
| Wind direction and speed (mph) |
NW
5
|
NW
5
|
N
5
|
NNE
7
|
NNW
8
|
NW
9
|
NNW
8
|
N
5
|
| Wind gust (mph) |
7
|
5
|
11
|
18
|
19
|
19
|
16
|
10
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
78%
|
83%
|
79%
|
64%
|
51%
|
47%
|
51%
|
67%
|
| UV | - | - | 1 | 4 | 6 | 3 | 1 | - |
Friday (23 May 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols |  |
|
|
|
|
|
|
|
| Chance of precipitation |
20%
|
20%
|
30%
|
30%
|
30%
|
30%
|
20%
|
20%
|
| Temperature (°C) |
11°
|
10°
|
11°
|
14°
|
16°
|
17°
|
16°
|
14°
|
| Feels like temperature (°C) |
10°
|
9°
|
10°
|
13°
|
15°
|
15°
|
15°
|
13°
|
| Wind direction and speed (mph) |
NNW
5
|
N
5
|
NW
5
|
WSW
7
|
SW
8
|
WSW
9
|
WSW
8
|
WSW
6
|
| Wind gust (mph) |
8
|
6
|
12
|
15
|
16
|
15
|
16
|
12
|
| Visibility (description) |
VG
|
VG
|
G
|
VG
|
G
|
G
|
VG
|
VG
|
| Humidity |
80%
|
86%
|
83%
|
74%
|
66%
|
58%
|
63%
|
81%
|
| UV | - | - | 1 | 3 | 5 | 2 | 1 | - |
Saturday (24 May 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
 |
|
|
|
|
|
|
| Chance of precipitation |
30%
|
30%
|
30%
|
40%
|
40%
|
40%
|
40%
|
30%
|
| Temperature (°C) |
12°
|
11°
|
12°
|
15°
|
17°
|
17°
|
16°
|
14°
|
| Feels like temperature (°C) |
11°
|
10°
|
11°
|
14°
|
15°
|
16°
|
15°
|
14°
|
| Wind direction and speed (mph) |
WSW
5
|
WSW
5
|
SW
6
|
SW
7
|
SW
9
|
SW
9
|
SW
9
|
SW
6
|
| Wind gust (mph) |
7
|
6
|
11
|
18
|
20
|
19
|
13
|
10
|
| Visibility (description) |
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
| Humidity |
88%
|
91%
|
90%
|
82%
|
75%
|
75%
|
80%
|
88%
|
| UV | - | - | 1 | 3 | 5 | 3 | 1 | - |
Tooltip header
UK video forecast
Ystrad Mynach weather map
View the weather with our interactive map
Loading map...
Wales weather forecast
Headline:
Settled this weekend. A few showers early next week.
Today:
A cloudy and cool start for some but sunnier in western areas. Brightening up in the east of Wales with plenty of strong sunshine across all of Wales by this afternoon. Feeling warm with light winds. Maximum temperature 21 °C.
Tonight:
Largely sunny and warm this evening, but quickly cooling down after dark under clear skies. Patchy cloud and mist may develop by the morning. Turning chilly with localised rural frost. Minimum temperature 3 °C.
Sunday:
Any early mist or patchy cloud soon clearing to leave another sunny day. It will feel warm in the light winds and strong sunshine with high UV levels. Maximum temperature 22 °C.
Outlook for Monday to Wednesday:
Mostly dry early next week but cloudier than of late with a few heavy, perhaps thundery showers possible on Monday and Tuesday. Dry and sunny again on Wednesday, staying warm.
Updated: