echo "tmax:"
echo; echo "winter: "
awk '(NR==4 || NR==5 || NR==15){print $1,$2;s+=$2;}END{print s/3;}' deltas.tmax_monthly_avg.1970-1999.dat
echo; echo "spring: "
awk '(NR>=6 && NR<=8){print $1,$2; s+=$2;}END{print s/3;}' deltas.tmax_monthly_avg.1970-1999.dat
echo; echo "summer: "
awk '(NR>=9 && NR<=11){print $1,$2; s+=$2;}END{print s/3;}' deltas.tmax_monthly_avg.1970-1999.dat
echo; echo "fall: "
awk '(NR>=12 && NR<=14){print $1,$2; s+=$2;}END{print s/3;}' deltas.tmax_monthly_avg.1970-1999.dat

echo "tmin:"
echo; echo "winter: "
awk '(NR==4 || NR==5 || NR==15){print $1,$2;s+=$2;}END{print s/3;}' deltas.tmin_monthly_avg.1970-1999.dat
echo; echo "spring: "
awk '(NR>=6 && NR<=8){print $1,$2; s+=$2;}END{print s/3;}' deltas.tmin_monthly_avg.1970-1999.dat
echo; echo "summer: "
awk '(NR>=9 && NR<=11){print $1,$2; s+=$2;}END{print s/3;}' deltas.tmin_monthly_avg.1970-1999.dat
echo; echo "fall: "
awk '(NR>=12 && NR<=14){print $1,$2; s+=$2;}END{print s/3;}' deltas.tmin_monthly_avg.1970-1999.dat

echo "precip:"
echo; echo "winter: "
awk '(NR==4 || NR==5 || NR==15){print $1,$2;s+=$2;}END{print s/3;}' deltas.precip_monthly_tot.1970-1999.dat
echo; echo "spring: "
awk '(NR>=6 && NR<=8){print $1,$2; s+=$2;}END{print s/3;}' deltas.precip_monthly_tot.1970-1999.dat
echo; echo "summer: "
awk '(NR>=9 && NR<=11){print $1,$2; s+=$2;}END{print s/3;}' deltas.precip_monthly_tot.1970-1999.dat
echo; echo "fall: "
awk '(NR>=12 && NR<=14){print $1,$2; s+=$2;}END{print s/3;}' deltas.precip_monthly_tot.1970-1999.dat