Hourly Weather Forecast - Merthyr, Carmarthenshire - Sir Gaerfyrddin, GB

12 PM
49°F
100%
21mph
S
Light Rain
Humidity
96%
Feels like
42°F
Dew Point
48°F
1 PM
50°F
100%
22mph
SSW
Light Rain
Humidity
97%
Feels like
43°F
Dew Point
49°F
2 PM
50°F
90%
22mph
SSW
Light Rain
Humidity
99%
Feels like
43°F
Dew Point
49°F
3 PM
50°F
90%
23mph
SSW
Light Rain
Humidity
99%
Feels like
50°F
Dew Point
50°F
4 PM
50°F
100%
23mph
SSW
Rain
Humidity
99%
Feels like
50°F
Dew Point
50°F
4:07 PM
5 PM
51°F
100%
25mph
SSW
Rain
Humidity
98%
Feels like
51°F
Dew Point
51°F
6 PM
51°F
100%
24mph
SSW
Rain
Humidity
97%
Feels like
51°F
Dew Point
51°F
7 PM
52°F
100%
25mph
SSW
Rain
Humidity
98%
Feels like
52°F
Dew Point
51°F
8 PM
52°F
90%
24mph
SSW
Rain
Humidity
99%
Feels like
52°F
Dew Point
52°F
9 PM
52°F
80%
19mph
SW
80% Chance of Light Rain
Humidity
99%
Feels like
52°F
Dew Point
52°F
10 PM
52°F
70%
14mph
SW
70% Chance of Light Rain
Humidity
96%
Feels like
52°F
Dew Point
51°F
11 PM
52°F
50%
10mph
SW
50% Chance of Light Rain
Humidity
92%
Feels like
52°F
Dew Point
49°F

Rainfall and Snowfall Totals Through Thursday

Pineapple Express Slams Northwestern U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Wednesday's Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide