grass minimum

grass minimum

[′gras ′min·ə·məm]
(meteorology)
The minimum temperature shown by a minimum thermometer exposed in an open situation with its bulb on the level of the tops of the grass blades of short turf.
References in periodicals archive ?
The month's lowest temperatures were recorded on January 31 at Dublin Airport where the mercury dropped to -5.8C air minimum temperature and -10.2C grass minimum temperature.
For gardening purposes, it is important to record the temperature at ground level and most weather stations set at least two thermometers to record these with a grass minimum thermometer set in contact with short grass.
airflo sunn tem thu oW su o r t " While it was a mostly sunny month more than half of Met Eireann's stations still reported ground frost.Both the month's lowest air and grass minimum temperature were recorded on the 12th at Mount Dillon, Co Roscommon, at -1.2C and -5.1C respectively.
LOWEST grass minimum temperature: -6.0C at Mullingar on 17th