Monthly climate guide
Cardiff weather in March
March in Cardiff is typically cool, with average daytime highs around 9°C (49°F) and night-time lows near 3°C (38°F). The month usually brings about 68 mm of rain (some rain) and is often cloudy. Daytime highs are 2°C warmer than February and 3°C cooler than April.
What stands out in March
- Days and nights are close, only about 6°C apart.
- March brings early spring to Cardiff.
- Cardiff is usually about 3°C warmer than Inverness in March.
Avg high
9°C
49°F
Avg low
3°C
38°F
Rainfall
68 mm
some rain
Humidity
89%
relative
Sky
74%
cloud · often cloudy
Cardiff weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 7°C / 45°F | 3°C / 38°F | 97 mm | 93% | 80% |
| February | 8°C / 46°F | 3°C / 37°F | 77 mm | 91% | 79% |
| March | 9°C / 49°F | 3°C / 38°F | 68 mm | 89% | 74% |
| April | 12°C / 54°F | 5°C / 41°F | 56 mm | 85% | 69% |
| May | 15°C / 60°F | 8°C / 46°F | 62 mm | 82% | 68% |
| June | 18°C / 64°F | 11°C / 52°F | 83 mm | 82% | 71% |
| July | 20°C / 68°F | 13°C / 55°F | 66 mm | 81% | 66% |
| August | 20°C / 67°F | 13°C / 55°F | 96 mm | 84% | 74% |
| September | 18°C / 64°F | 11°C / 52°F | 73 mm | 85% | 69% |
| October | 14°C / 58°F | 9°C / 48°F | 98 mm | 89% | 76% |
| November | 10°C / 51°F | 6°C / 42°F | 104 mm | 92% | 80% |
| December | 9°C / 48°F | 5°C / 41°F | 124 mm | 93% | 83% |
What to pack for March
- A proper insulated winter coat
- A hat, scarf and gloves
- A small travel umbrella, just in case
Is March a good time to visit Cardiff?
Compare the months in the chart above to find your ideal window.
Best time to visit Cardiff →Other United Kingdom cities in March
Cite or embed this data
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Cardiff weather in March. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/uk/cardiff/march
<a href="https://weathercompare.eu/weather/uk/cardiff/march">Cardiff weather in March</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/uk/cardiff" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Cardiff weather in March"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/uk/cardiff/march">Cardiff weather in March</a> – WeatherCompare</p>
Cardiff in March: quick answers
Is March a good time to visit Cardiff?
March is cool in Cardiff, with highs around 9°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Cardiff in March?
Average highs are about 9°C (49°F) and average lows about 3°C (38°F), based on 10 years of daily data.
Does it rain a lot in Cardiff in March?
Cardiff typically gets around 68 mm of rain in March — some rain.
Figures are long-term averages for the area around Cardiff (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.