Diary of Highlights

1st to 7th
The first week was largely dry with high pressure to the north and a north-easterly wind across Wales. Winds became more northerly as high pressure moved south to Ireland. Generally dry with sunny spells, but with cool nights and pleasantly warm in some spots by day. There was a touch of ground frost in some rural areas with 0.8 °C at Trawscoed on the 2nd. Trawscoed recorded 16 °C on the 7th.

8th to 14th
High pressure continued to dominate the weather although moving south of Wales for a time with a more westerly wind flow. Nights were milder at first with cloud and a minimum of 10 °C at Rhyl on the 10th, then sunny spells by day with maximum 17.5 °C at St Athan. A low temperature of -1.2 °C at Sennybridge reported on the 11th, but a daytime maximum of 17.5 °C at Trawsgoed. A maximum temperature of 22 °C was recorded at Capel Curig on the 13th.

15th to 17th
Warm and sunny on the 15th. Although high pressure remained, a weak weather front moved across the country on the 16th with cooler, slightly frosty nights. Mainly dry, but one notable rainfall event - a thunderstorm was reported at Merthyr Tydfil with 31.2 mm recorded between 1400 and 1600. Cloudier on the 16th, but bright spells allowed Pembrey Sands to report 18.5 °C, and a cooler 11.8 °C at Aberporth.

18th to 21st
A slight frost at Sennybridge on the 18th with -0.1 °C, and -0.9 °C reported at Trawscoed on the 19th, but a maximum at Sennybridge of 17.2°C by day. On the 20th Trawscoed recorded a low of -0.7C and a high of 18.6 °C.

22nd
High pressure move to the east on the 21st with a south-westerly flow bringing mild air and bands of rain across Wales until the 25th. Then high pressure re-established itself towards the end of the month. Some rain reached north Wales on the 22nd and continued until the 24th with 69 mm recorded at Capel Curig in 36 hours.

23rd to 30th
A maximum of 17.2 °C at Hawarden on the 23rd and 17.8 °C on the 24th. Valley recorded a 24 hour minimum of 11.4 °C on 25 April, which was their highest 24 hour April minimum on record (records back to 1931). The rest of the month was largely dry with bright or sunny spells, and just a few showers. Pleasantly warm with a north-easterly wind. A temperature of 19.5 °C was recorded at Hawarden on the 29th and 21.5 °C at Pembrey Sands on the 30th.