March weather forecast
Cardiff, United Kingdom

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Weather in March

Cardiff, United Kingdom, welcomes spring in March. With temperatures rising to 9.8°C (49.6°F), this month experiences a departure from the low temperatures of February. Free of snowfall, March signifies a shift in seasons and brings about a palpable excitement in the air as the chill diminishes. This change in weather sets pace for more outdoor activity, attracting tourists to the scenic landscapes of the city. Cardiff's vibrant spring festival taking place in this transitional season magnifies the charm of the city manifold.

Temperature

The average high-temperature during March is a still chilly 9.8°C (49.6°F), almost matching the conditions of the preceding month. Nighttime temperatures in Cardiff hover around an average low of 4.4°C (39.9°F) in March.

Humidity

In March, the average relative humidity in Cardiff is 82%.

Rainfall

In Cardiff, in March, it is raining for 9.9 days, with typically 17mm (0.67") of accumulated precipitation. Throughout the year, there are 132.6 rainfall days, and 252mm (9.92") of precipitation is accumulated.

Snowfall

March through October are months without snowfall in Cardiff, United Kingdom.

Sea temperature

March is the month with the coldest seawater in Cardiff, with an average sea temperature of 8.7°C (47.7°F).
Note: Immersing oneself in 8.7°C (47.7°F) at sub-10°C (14°F) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.

Daylight

In Cardiff, United Kingdom, the average length of the day in March is 11h and 55min.
On the first day of March in Cardiff, sunrise is at 6:56 am and sunset at 5:53 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 6:44 pm GMT.

Sunshine

In Cardiff, the average sunshine in March is 5.9h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A daily maximum UV index of 2 in March translates into the following instructions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.

Frequently asked questions

What is the temperature in March in Cardiff?

Cardiff in March has an average high-temperature of 9.8°C (49.6°F) and an average low-temperature of 4.4°C (39.9°F).

What is the average humidity in March in Cardiff?

In March, the average relative humidity in Cardiff is 82%.

How many days does it rain in March in Cardiff?

In March, in Cardiff, the rain falls for 9.9 days. Throughout March, 17mm (0.67") of precipitation is accumulated.

When it does not snow in Cardiff?

In Cardiff, snow does not fall in March through October.

Does it snow in Cardiff in March?

In March, in Cardiff, United Kingdom, it doesn't snow. February is the latest month when it typically snows.

What is the month with the coldest sea water in Cardiff?

March is the month with the coldest seawater in Cardiff, United Kingdom, with an average sea temperature of 8.7°C (47.7°F).

What is the sea water temperature in March in Cardiff?

In Cardiff, the average seawater temperature in March is 8.7°C (47.7°F). Swimming in 8.7°C (47.7°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Cardiff have in March?

In Cardiff, United Kingdom, the average day length in March is 11h and 55min.

When are sunrise and sunset in March in Cardiff?

On the first day of March in Cardiff, sunrise is at 6:56 am and sunset at 5:53 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 6:44 pm GMT.

How long on average sun shines in March in Cardiff?

The average sunshine duration in March in Cardiff is 5.9h.

What is the month with the lowest UV index in Cardiff?

The months with the lowest UV index in Cardiff are January through March, November and December, with an average maximum UV index of 2.

What is the UV index intensity in March in Cardiff?

The average daily maximum UV index in March in Cardiff is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in March
Cardiff, United Kingdom

Average temperature in March - Cardiff, United Kingdom
  • Average high temperature in March: 9.8°C

The warmest month (with the highest average high temperature) is July (19°C).
The month with the lowest average high temperature is January (7.5°C).

  • Average low temperature in March: 4.4°C

The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is February (3.9°C).

Average pressure in March
Cardiff, United Kingdom

Average pressure in March - Cardiff, United Kingdom
  • Average pressure in March: 1015.3mbar

The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010mbar).

Average wind speed in March
Cardiff, United Kingdom

Average wind speed in March - Cardiff, United Kingdom
  • Average wind speed in March: 19.9km/h

The windiest month (with the highest average wind speed) is February (22.3km/h).
The calmest months (with the lowest average wind speed) are June and July (15.2km/h).

Average humidity in March
Cardiff, United Kingdom

Average humidity in March - Cardiff, United Kingdom
  • Average humidity in March: 82%

The months with the highest relative humidity are November and December (86%).
The months with the lowest relative humidity are April and May (81%).

Average rainfall in March
Cardiff, United Kingdom

Average rainfall in March - Cardiff, United Kingdom
  • Average rainfall in March: 17mm

The wettest months (with the highest rainfall) are August and November (31mm).
The driest month (with the least rainfall) is April (12mm).

Average rainfall days in March
Cardiff, United Kingdom

Average rainfall days in March - Cardiff, United Kingdom
  • Average rainfall days in March: 9.9 days

The month with the highest number of rainy days is November (13.5 days).
The months with the least rainy days are February and April (9.1 days).

Average snowfall in March
Cardiff, United Kingdom

Average snowfall in March - Cardiff, United Kingdom
  • Average snowfall in March: 0mm

The month with the highest snowfall is February (5mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).

Average snowfall days in March
Cardiff, United Kingdom

Average snowfall days in March - Cardiff, United Kingdom
  • Average snowfall days in March: 0.3 days

The month with the highest number of snowfall days is February (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average sea temperature in March
Cardiff, United Kingdom

Average sea temperature in March - Cardiff, United Kingdom
  • Average sea temperature in March: 8.7°C

The best months for swimming (with the highest average sea temperature) are August and September (16.6°C).
The coldest month (with the lowest average sea temperature) is March (8.7°C).

Average daylight in March /
Average sunshine in March
Cardiff, United Kingdom

Average daylight in March / Average sunshine in March - Cardiff, United Kingdom
  • Average daylight in March: 11h and 5min

The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).

  • Average sunshine in March: 5h and 5min

The month with the most sunshine is May (Average sunshine: 8h and 12min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).

Average sunshine days in March
Cardiff, United Kingdom

Average sunshine days in March - Cardiff, United Kingdom
  • Average sunshine days in March: 18.8 days

The month with the most sunshine days is April (19.2 days).
The month with the least sunshine days is November (13.7 days).

Average UV index in March
Cardiff, United Kingdom

Average UV index in March - Cardiff, United Kingdom
  • Average UV index in March: 2

The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in March
Cardiff, United Kingdom

Average cloud cover in March - Cardiff, United Kingdom
  • Average cloud cover in March: 52

The month with the most cloud cover is November (Cloud cover 61).
The months with the least cloud cover are April and May (Cloud cover 46).

Average visibility in March
Cardiff, United Kingdom

Average visibility in March - Cardiff, United Kingdom
  • Average visibility in March: 10km

The months with the highest visibility are February, March and December (10km).
The months with the lowest visibility are January, April, May, June, July, August, September, October and November (9km).

Cardiff, United Kingdom

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