Ken Cook
Reports for December 2023 for the Copley sites. (Averages refer to 1991-2020)
Cold start, then mild, wet and windy.
(Differences from 1990-2020 averages in brackets)
Copley Lead Mill site 218metres asl
Temperature °C (09Z-09Z)
Mean maximum 6.7 (0.9) High 11.6 on 18th, Low -1.3 on 1st
Mean minimum 1.5 (1.5) Low -7.1 on 2nd, High 8.2 on 24th
Mean screen 4.1 (1.2)
Mean 30cm earth 4.7 (-0.0)
Air frost 11 (-6)
Days snow lying 50% 09Z, 4 (-4) snow on ground 7 (-1)
Max depth 09Z 9cm on 1st
River Gaunless data (Copley Lead Mill Environment Agency monitoring site 09Z daily readings)
Mean level 0.25m high 0.55m on 7th, low 0.15m on 1st (normal 0.00m to 0.60m)
Mean river temperature 09Z 5.3, high 8.7 on 18th, low 2.2 on 2nd
Copley Met O site 253metres asl
Temperature °C (09Z-09Z)
Mean maximum 6.8 (1.1) High 11.4 on 23rd, Low 0.3 on 2nd
Mean minimum 1.9 (1.3) Low -6.8 on 2nd, High 8.1 on 24th
Mean screen 4.3 (1.2)
Mean grass minimum -0.9 (1.4) Low -12.8 on 2nd
Mean concrete minimum 1.2 (1.5) Low -8.9 on 2nd
Mean 30cm earth 5.8 (0.7)
Mean 100cm earth 7.1 (0.5)
Air frost 9 (-4) 112 hours
Ground frost 15 (-8)
Concrete frost 11 (-6)
Precipitation mm (09Z-09Z)
Total 152.2 (175%) High 27.6 on 4th
Days 0.2mm 26 (6)
Days 1.0mm 18 (3)
Hail 1 (0)
Thunder 0 (0)
Snow cm
Days falling 13 (2)
Days lying 50% 09Z, 4 (-3) snow on ground 5
Fresh falls 09Z 7cm (-7cm)
Max depth 09Z 11cm on 3rd
Sunshine hr (R&D electronic recorder) Sunshine hr (Campbell Stokes)
Total 61.5 (87%) 44.5 (83%)
Max day 7.0 on 1st 6.2 on 1st
Average daily 2.0 (27% of the possible 7.3hr / day) 1.4 (19% possible)
Days no sun 11 (2) 13 (2)
Fog (Vis <1km 09Z), 4 (0)
Wind KT (Davis recorder)
Mean SW 10.8 (0.0) High gust 49 on 21st
Gale days 5 (3)
All the best for 2024
Ken Cook, Copley, Teesdale / Weardale watershed