"daily mean" is correct and usable in written English.
It is typically used to describe the average or typical value of something on a daily basis. Example: The daily mean temperature in this region is 25 degrees Celsius.
d Daily mean variability of Ap index.
c Daily mean variability of F 10.7 cm solar flux.
Daily mean concentration, C d Daily mean number of pollen grains per air volume in n/m3 from standardised measurements using a volumetric pollen monitor.
Daily mean F differences (4th panel) and temperature (5th panel) are also shown.
Daily mean air temperatures of >26°C during grain filling are becoming more frequent in Japan.
Figure 3 Representative daily mean minimum temperatures for the Teakettle Watershed study site during July 2012.
Figure 6 shows the long-term daily mean water levels for 10 selected waterholes.
The paper investigated the errors in the HIRS daily mean OLR at averaging domains of various temporal and spatial scales.
The model estimates daily mean concentrations.
Daily mean throughput time was 210 min (SD 16.6).
