Reports for May 2021 for the Copley sites. (Averages refer to 1991-2020)

Dull, cold and wet, light winds, fine end

Copley Lead Mill site 218metres asl
Temperature °C (09Z-09Z)
Mean maximum 13.0 (-1.9) High 20.4 on 29th, Low 8.2 on 4th
Mean minimum 3.0 (-1.8) Low -2.6 on 6th, High 7.1 on 29th
Mean screen 8.0 (-1.9)
Mean 30cm earth 9.4 (-1.6)
Air frost 7 (+4)
Days snow lying 50% 09Z, 0 (0)
Max depth 09Z 0cm on 0th

Copley Met O site 253metres
Temperature °C (09Z-09Z)
Mean maximum 12.6 (-1.7) High 20.0 on 29th, Low 7.4 on 4th
Mean minimum 3.5 (-1.7) Low -2.6 on 6th, High 7.3 on 29th
Mean screen 8.1 (-1.7)
Mean grass minimum 0.1 (-2.0) Low -7.8 on 6th
Mean 30cm earth 9.8 (-1.3)
Mean 100cm earth 8.8 (-0.9)
Air frost 4 (+3) 15.0 hours
Ground frost 19 (+8)

Precipitation mm (09Z-09Z)
Total 98.4 (183%) High 19.9 on 20th
Days 0.2mm 19 (+4)
Days 1.0mm 14 (+4)
Hail 7
Thunder 0

Snow cm
Days falling 6 (+5)
Days lying 50% 09Z, 0 (0) 50% 0
Fresh falls 09Z 0cm (0cm)
Max depth 09Z 0cm on 0th

Sunshine hr (R&D electronic recorder) Sunshine hr (Campbell Stokes)
Total 149.4 (81%) 170.2
Max day 15.5 on 30th 14.6 on 30th
Average daily 4.8 (30% of the possible 16.1hr / day) 5.5 (34% possible)
Days no sun 1 1

Fog (Vis 1km 09Z), 0

Wind KT (Davis recorder)
Mean NW 5.5 (-3.2) High gust 27 on 21st
Gale days 0
Ken
Copley
Teesdale