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Mild at the beginning a wintry spell in the middle with a wet and mild end Rainfall was 172.2 mm (142%) & [167%] of averages, most since 2021 ranking 9th out of 96 Llansadwrn records. The wettest day was on the 23rd having 23.6 mm. Six days (+2.2) had no precipitation what so ever and there were 8 dry days (defined as having <0.2 mm). Rain days (>= 0.2 mm) were 23 (-0.5); wet days (>=1.0 mm) were 10 (+2.4); and days having 5 mm, or more. totaled 11 (+2.8). It was wetter in Llanfairfechan at Gorwel Heights where 194.8 mm fell, most since 2021, the second largest on record since 2011 at the station. The wettest days were on the 29th when 29.2 mm fell and 28th when 27.2 mm fell. There were 9 dry days; 22 rain days; 20 wet days; and 12 had 5 mm, or more. There were 165 wet hours duration with an average fall of 1.2 mm/h. With the same rate of rainfall 1.2 mm/h Llansadwrn had 147 wet hours duration. The mean temperature in Llansadwrn was 5.7C (0.0) & [+0.3] of records, lowest since 2021, ranking 17th highest in station records since 1979. The mean maximum was 7.9C (-0.1) & [0.0] the highest maximum 12.7C (+0.6) on the 28th and the lowest 3.7C (-0.7) on the 9th. The mean minimum was 3.5C (+0.2) & [+0.6], there were 2 days (-1.4) with air frost lowest -2.6C on the 18th and -2.3C on the 19th, frost duration was 31.8h . Ground frost occurred on 12 days (-5.1) the lowest -6.0C was on the 18th. At Gorwel Heights the mean temperature was 6.5C lowest since 2021 and the 3rd lowest in records since 2021. The highest mean 12.1C was on the 28th and the lowest 2.2C on the 17th. The mean maximum was 8.6C with the highest maximum 17.8C on the 28th a station record for January, the lowest 2.8C on the 17th. The mean minimum was 4.3C and there were 2 days with a touch of air frost -0.6C on the 18th and -0.4C on the 19th of just 5.2h duration.
February 2023Above average temperatures and rainfall, less sunshine than usualMildest and sunniest in the middle of the month A very mild month with the mean temperature 7.6C (+1.4) & [+2.0] of averages, highest since 2019 ranking 3rd in station records since 1979. The mean maximum 10.0C (+1.2) & [+1.6] highest since 2019, the highest maximum 12.8C on the 14th with the lowest 5.8C on the 8th (+1.4). The mean minimum 5.1C (+1.6) & [+2.3] of averages ranked 2nd, highest since 1998. The highest minimum was 10.1C on the 15th and the lowest 0.9C on the 25th, there were no air frosts, the last February with air frosts was in 2021 that had six. There were 9 ground frosts with the lowest -5.6C on the 9th, least since 2011 (there were 23 in 2018 and the most in recent years 24 in 1986). At Gorwel Heights, Llanfairfechan, the mean temperature was 8.7C (+1.8) & [+2.6] was highest on record. The mean maximum was 11.1C, highest since 2019 R2, the highest maximum 15.8C on the 15th and the lowest 5.3C on the 8th. The mean minimum was 6.3C highest on record, the highest 11.0C on the 15th and the lowest 2.3C on the 25th highest since 2022 R2. Rainfall in Llansadwrn was 134.3 mm (122%) & [148%] of averages, most since 2021 ranking 13th in records back to 1928. Most rainfall in a day was on the 28th with 20.3 mm There was just one day with no precipitation recorded and 4 (-4.8) dry days; 25 (+5.6) rain days; 19 (+5.6) wet days; and 8 (+1.0) days had 5 mm, or more. Rainfall duration was 152h. At Gorwel Heights rainfall was 147.4 mm (161%) & [197%] of averages, most since 2020 R2. The wettest day was on the 8th having 33.2 mm, 6 days had 10 mm or more. There were 9 dry days; 20 rain days; 17 wet days; and 9 had 5 mm, or more. Sunshine at RAF Valley was a provisional 69.5h, least since 2017 R32. The sunniest day was on the 26th with 7.5h, there were 10 sunless days.
Winter 2016/17Warmer and wetter than 30y climatological averages. Wetter the last decade, but average on temperatures.
March 2023An atypical month. Wet with below average sunshine and above average temperaturesSimilar throughout. Temperatures continue to be above normal with the mean 8.0C (+0.9) & [+1.0} of averages highest since 2022 ranking 8th in station records since 1979. The mean maximum 11.0C ranked 15th with the highest maximum 14.9C reached only on the last day the 31st (-1.4). The lowest maximum 6.3C in the 1st was (+1.5). Minimum temperatures were most significantly above the averages with the mean 5.1C (+1.2) & [+1.3], the lowest 1.0C on the 2nd (+1.6). There were no air frosts and only 7 ground frosts (-7.3) mostly at the beginning of the month, lowest -2.6 (+2.4). At Gorwel Heights in Llanfairfechan the mean temperature was 8.8C (+1.0) & [+1.2] of averages equal highest with 2019 on record since 2011. The highest maximum was 15.9C on the 14th that also had the highest minimum 11.0C. The mean minimum was 6.1C equal highest with 2022 since 2017 with 6.2C ranking 3rd in records. The lowest minimum on the 2nd was 0.8C highest since 2022. A wet month with rainfall of 131.1 mm in Llansadwrn (131%) & [167%] of averages and 123.6 mm (130%) & [149%] of averages at Gorwel Heights. The wettest day was on the 13th with 29.8 mm in Llansadwrn and 27.2 mm at Gorwel Heights. In Llansadwrn there were 5 days (-2.9) with no precipitation recorded and 9 dry days (-3.2). Rain days were 22 (+3.2); wet days 18 (+4.0) and 8 days (+1.8) had 5 mm, or more. At Gorwel Heights there were 9 dry days; 22 rain days; 19 wet days; and 8 had 5 mm, or more. Rainfall duration (wet hours) in Llansadwrn 145h and Gorwel Heights 119h. Sunshine at RAF Valley was 114.1h (provisional) with the sunniest day on the 30th having 10.1h and 2 sunless days. Cloudier in Llansadwrn where there were 6 sunless days.
Monthly data 2024
Llanfairfechan, Gorwel Heights observations
AcknowledgementsThe Met Office at RAF Valley kindly supplied observational data from 1942 to 2011. Current data (provisional) are gathered from SYNOP reports and METAR, final data from the Met Office website. I am grateful to David Lee for use of data from Gorddinog.
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