Ken Cook
Reports for May 2025 for the Copley sites. (Averages refer to 1991-2020)
Dry and sunny, warm by day again.
(Differences from 1991-2020 averages in brackets)
Copley Lead Mill site 218metres asl
Temperature °C (09Z-09Z)
Mean maximum 16.0 (1.1) High 22.9 on 1st, Low 9.2 on 4th
Mean minimum 4.3 (-0.5) Low -1.9 on 6th, High 11.8 on 30th
Mean screen 10.1 (0.2)
Mean 30cm earth 12.6 (1.8)
Air frost 3 (0)
Days snow lying 50% 09Z, 0 (0) snow on ground 0
Max depth 09Z 0cm on 0th
River Gaunless data (Copley Lead Mill Environment Agency monitoring site 09Z daily readings)
Mean level 0.08m high 0.09m on 30th low 0.07m on 12th ((normal 0.00m to 0.60m)
Mean river temperature 09Z 9.0, high 10.1 on 13th, low 7.6 on 15th
Copley Met O site 253metres asl
Temperature °C (09Z-09Z)
Mean maximum 15.9 (1.6) High 22.5 on 1st, Low 8.4 on 4th
Mean minimum 5.4 (0.2) Low -1.7 on 6th, High 12.3 on 30th
Mean screen 10.7 (0.9)
Mean grass minimum 0.2 (-1.8) Low -9.0 on 6th
Mean concrete minimum 6.2 (0.7) Low -0.7 on 6th
Mean 30cm earth 13.1 (2.0)
Mean 100cm earth 11.4 (1.7)
Air frost 3 (2) 11.5 hours
Ground frost 18 (7)
Concrete frost 1 (0)
Precipitation mm (09Z-09Z)
Total 29.1 (54%) High 7.4 on 28th
Days 0.2mm 10 (-5)
Days 1.0mm 7 (-3)
Hail 1 (1)
Thunder 1 (0)
Snow cm
Days falling 0 (-1)
Days lying 50% 09Z, 0 (0) snow on ground 0
Fresh falls 09Z 0cm (0cm)
Max depth 09Z 0cm on 0th
Sunshine hr (R&D electronic recorder) Sunshine hr (Campbell Stokes)
Total 243.2(134%) 262.0 (127%)
Max day 15.0 on 16th 14.2 on 16th
Average daily 7.8 (49% of the possible 16.1hr / day) 8.5 (52% possible)
Days no sun 0 (-2) 0 (-2)
Fog (Vis <1km 09Z), 0 (-1)
Pressure mb (mean sea level)
Average 09Z 1018.6 (3.4)
High 1030.5 on 16th
Low 997.4 on 25th
Wind KT (Davis recorder)
Mean N 5.9 (-1.7) High gust 37 on 25th
Gale days 0 (0)
Ken Cook, Copley, Teesdale / Weardale watershed