Please note, Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales. Data are available for bulk download.
Base Period
Trend

Filter
Contiguous U.S. Precipitation
January-May
Period
Precipitation
Rank
(out of 122)
Anomaly
1901-2000 Mean: 12.38in
January-May 201612.96"860.58"
January-May 201512.97"870.59"
January-May 201411.66"36-0.72"
January-May 201312.34"65-0.04"
January-May 201211.53"30-0.85"
January-May 201113.38"1001.00"
January-May 201012.62"740.24"
January-May 200911.98"51-0.40"
January-May 200812.74"800.36"
January-May 200711.52"29-0.86"
January-May 200611.27"19-1.11"
January-May 200512.43"690.05"
January-May 200412.26"59-0.12"
January-May 200312.27"60-0.11"
January-May 200210.82"10-1.56"
January-May 200111.51"28-0.87"
January-May 200011.68"37-0.70"
January-May 199913.02"890.64"
January-May 199815.07"1212.69"
January-May 199713.40"1011.02"
January-May 199612.83"830.45"
January-May 199514.69"1182.31"
January-May 199412.00"53-0.38"
January-May 199314.07"1121.69"
January-May 199211.25"17-1.13"
January-May 199114.41"1142.03"
January-May 199014.49"1152.11"
January-May 198912.01"54-0.37"
January-May 19889.92"3-2.46"
January-May 198711.87"46-0.51"
January-May 198611.44"25-0.94"
January-May 198510.52"7-1.86"
January-May 198412.31"61-0.07"
January-May 198315.12"1222.74"
January-May 198213.51"1051.13"
January-May 198111.09"13-1.29"
January-May 198013.41"1021.03"
January-May 197915.00"1202.62"
January-May 197813.37"990.99"
January-May 197710.84"11-1.54"
January-May 197611.44"25-0.94"
January-May 197514.57"1162.19"
January-May 197413.08"910.70"
January-May 197314.79"1192.41"
January-May 197211.47"27-0.91"
January-May 197111.26"18-1.12"
January-May 197011.78"42-0.60"
January-May 196912.39"660.01"
January-May 196811.60"33-0.78"
January-May 196711.11"16-1.27"
January-May 196611.03"12-1.35"
January-May 196511.89"48-0.49"
January-May 196412.34"65-0.04"
January-May 196310.43"6-1.95"
January-May 196211.69"38-0.69"
January-May 196112.60"730.22"
January-May 196011.99"52-0.39"
January-May 195912.02"55-0.36"
January-May 195812.88"850.50"
January-May 195714.60"1172.22"
January-May 195611.37"23-1.01"
January-May 195511.29"22-1.09"
January-May 195411.28"20-1.10"
January-May 195313.50"1041.12"
January-May 195212.46"710.08"
January-May 195111.92"49-0.46"
January-May 195013.04"900.66"
January-May 194913.10"920.72"
January-May 194812.83"830.45"
January-May 194711.93"50-0.45"
January-May 194612.66"760.28"
January-May 194513.59"1061.21"
January-May 194413.87"1101.49"
January-May 194311.88"47-0.50"
January-May 194212.03"56-0.35"
January-May 194111.59"32-0.79"
January-May 194012.44"700.06"
January-May 193911.83"44-0.55"
January-May 193813.74"1091.36"
January-May 193713.02"890.64"
January-May 193611.85"45-0.53"
January-May 193513.28"960.90"
January-May 19349.38"1-3.00"
January-May 193312.59"720.21"
January-May 193212.34"65-0.04"
January-May 193110.07"5-2.31"
January-May 193011.28"20-1.10"
January-May 192913.63"1081.25"
January-May 192810.76"9-1.62"
January-May 192713.11"930.73"
January-May 192611.10"14-1.28"
January-May 19259.65"2-2.73"
January-May 192410.73"8-1.65"
January-May 192312.68"780.30"
January-May 192214.10"1131.72"
January-May 192111.73"39-0.65"
January-May 192012.68"780.30"
January-May 191912.87"840.49"
January-May 191811.38"24-1.00"
January-May 191711.80"43-0.58"
January-May 191612.66"760.28"
January-May 191513.24"950.86"
January-May 191411.64"35-0.74"
January-May 191312.32"62-0.06"
January-May 191213.46"1031.08"
January-May 191111.10"14-1.28"
January-May 19109.92"3-2.46"
January-May 190913.15"940.77"
January-May 190813.62"1071.24"
January-May 190712.78"810.40"
January-May 190612.74"800.36"
January-May 190514.00"1111.62"
January-May 190412.05"57-0.33"
January-May 190313.31"970.93"
January-May 190211.76"41-0.62"
January-May 190111.60"33-0.78"
January-May 190012.40"670.02"
January-May 189912.21"58-0.17"
January-May 189811.75"40-0.63"
January-May 189713.32"980.94"
January-May 189612.41"680.03"
January-May 189511.58"31-0.80"

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