PRISM analysis 4kM2
X axis: regular grid with 1405 0.04° steps, first point at 125.00° W, last point at 66.50° W
Y axis: regular grid with 621 0.04° steps, first point at 24.08° N, last point at 49.92° N

Monthly data available from Jan1895 to Dec2017 (1476 months)
Variable tmean (monthly mean temperature) in Celsius
Full metadata.

Get grid points, average area or generate subset

Mask:	no mask mask3.txt   add a mask to the list
Latitude:	°N - °N
Longitude:	°E - °E
Boundaries:	halfway grid points interpolated
Make:	average max min set of grid points subset of the field
Demand at least:	% valid points in this region

Create a field with lower time resolution

New time scale:	annual (Jul-Jun) annual (Jan-Dec) biannual seasonal
New variable:	mean sd sum sum above sum below number min time of min max time of max first time last time of temperature
Threshold:	no cut less than greater than Celsius percentile normal 1971-2000
Minimum:	% valid data
First apply:	-month running mean
Missing data:	ignore, climatology, trend, persistence.

Create a field with lower spatial resolution

Average over blocks of longitude and latitude grid cells

getfieldtype: please ask me to add "tmean" to the lists in getfieldtype

Construct a statistical forecast model from this field

Please consider downloading this field from the authoritative site.
If you really want to get it here, PRISM temperature is available as a netcdf file (size 1556.15 MB).