|dtr||T range||diurnal temperature range||degrees Celsius|
|frs||frost||frost day frequency||days|
|tmn||T min||daily minimum temperature||degrees Celsius|
|tmp||T mean||daily mean temperature||degrees Celsius|
|tmx||T max||daily maximum temperature||degrees Celsius|
|wet||wetdays||wet day frequency||days|
The values supplied are at time scales of a month or longer. Day-to-day variations are not supplied. The temperature values are the monthly (or seasonal, or annual) means of the daily statistics; for example, the daily minimum temperature for January is the monthly mean of the 31 minimum temperatures during January.
The temperature variables are related as follows: the diurnal temperature range is the difference between the daily minimum and maximum temperatures; the daily 'mean' temperature is the mid-point (median) between the daily minimum and maximum temperatures.
The frost frequency is the number of days in a month in which daily minimum temperature dropped below zero degrees Celsius. The wet day frequency is the number of days in a month in which precipitation occurs.