Index

Descriptive name

Definition

Unit

Temperature

TXx

Warmest day

Annual highest TX

˚C

TNx

Warmest night

Annual highest TN

˚C

TXn

Coldest day

Annual lowest TX

˚C

TNn

Coldest night

Annual lowest TN

˚C

TN10p

Cold night frequency

Percentage of days when TN < 10th percentile of 1961-1990

d

TX10p

Cold day frequency

Percentage of days when TX < 10th percentile of 1961-1990

d

TN90p

Warm night frequency

Percentage of days when TN > 90th percentile of 1961-1990

d

TX90p

Warm day frequency

Percentage of days when TX > 90th percentile of 1961-1990

d

FD

Frost days

Annual count when TN < 0˚C

d

ID

Ice days

Annual count when TX < 0˚C

d

SU25

Summer days

the highest temperature is over 25˚C day number

d

DTR

Diurnal temperature range

Annual mean difference between TX and TN

˚C

Precipitation

SDII

Simple daily intensity index

Average precipitation on wet days

Mm/d

PRCPTOT

Wet day precipitation

Annual total precipitation from wet days

mm

RX1day

Maximum 1-day precipitation

Annual maximum 1-day precipitation

mm

RX5day

Maximum 5-day precipitation

Annual maximum consecutive 5-day precipitation

mm

CDD

Consecutive dry days

Maximum number of consecutive dry days

d

CWD

Consecutive wet days

Maximum number of consecutive wet days

d

R95p

Very wet day precipitation

Annual total precipitation when RR > 95th percentile of 1961-1990 daily precipitation

mm