Monthly Climate Summaries
The monthly climate summaries provide daily climate data for all days in
a month. For Ithaca, the summarization period is the 24 hours ending at
8am on the date indicated. For example, the maximum temperature that is
provided for December 8th is the highest temperature that occurred between
8am on December 7th and 8am on December 8th.
The columns of data that are displayed are:
- DAY - day of the month
- MAX - maximum temperature recorded on this day (degrees F)
- MIN - minimum temperature recorded on this day (degrees F)
- AVG - average temperature (average of MAX and MIN)
- DPT - departure of the average temperature from the 30-year normal
- HDD - heating degree days (base 65)
- CDD - cooling degree days (base 65)
- GDD - growing degree days (base 50)
- PRECIP - precipitation (rain and/or liquid equivalent of snow) (inches)
- SNOW - daily snowfall (i.e. new snow) (inches)
- DEPTH - depth of snow on the ground at the time of observation (inches)
Other notes:
- A normal is a 30-year average consisting of three consecutive decades.
The normal period 1961-1990 was used through December 2001.
Beginning in January 2002, normals were updated to reflect the period 1971-2000.
- For incomplete
months, the value on the "NORMALS" line indicates the normal for the month
through the last day of mon-missing data for the month.
- Values of *** indicate missing data.
- A value of "Tr" indicates "a trace" (less than 0.01 inch of PRECIP,
less than 0.1 inch of SNOW, or less than 1 inch for DEPTH).
- These values are subject to change as additional quality control is performed.