National Rankings

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Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Precipitation Rankings, September 2006

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Record Driest
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Record Wettest
Period	Value	1901-2000 Mean	Anomaly	Rank (1895-2022)	Wettest/Driest Since	Record
September 2006 1-Month	2.80" (71.12mm)	2.49" (63.25mm)	0.31" (7.87mm)	100th Driest	Driest since: 2005	1956
September 2006 1-Month	2.80" (71.12mm)	2.49" (63.25mm)	0.31" (7.87mm)	29th Wettest	Wettest since: 2004	1986
Aug–Sep 2006 2-Month	5.60" (142.24mm)	5.11" (129.79mm)	0.49" (12.45mm)	107th Driest	Driest since: 2005	1956
Aug–Sep 2006 2-Month	5.60" (142.24mm)	5.11" (129.79mm)	0.49" (12.45mm)	22nd Wettest	Wettest since: 2004	1977
Jul–Sep 2006 3-Month	8.06" (204.72mm)	7.88" (200.15mm)	0.18" (4.57mm)	82nd Driest	Driest since: 2005	1930
	8.06" (204.72mm)	7.88" (200.15mm)	0.18" (4.57mm)	47th Wettest	Wettest since: 2004	1915
	Ties: 1907
Jun–Sep 2006 4-Month	10.62" (269.75mm)	10.81" (274.57mm)	-0.19" (-4.82mm)	48th Driest	Driest since: 2002	1930
Jun–Sep 2006 4-Month	10.62" (269.75mm)	10.81" (274.57mm)	-0.19" (-4.82mm)	81st Wettest	Wettest since: 2005	1915
May–Sep 2006 5-Month	12.91" (327.91mm)	13.72" (348.49mm)	-0.81" (-20.58mm)	29th Driest	Driest since: 2000	1956
May–Sep 2006 5-Month	12.91" (327.91mm)	13.72" (348.49mm)	-0.81" (-20.58mm)	100th Wettest	Wettest since: 2005	1915
Apr–Sep 2006 6-Month	15.45" (392.43mm)	16.24" (412.50mm)	-0.79" (-20.07mm)	32nd Driest	Driest since: 2002	1956
Apr–Sep 2006 6-Month	15.45" (392.43mm)	16.24" (412.50mm)	-0.79" (-20.07mm)	97th Wettest	Wettest since: 2005	1915
Mar–Sep 2006 7-Month	17.76" (451.10mm)	18.75" (476.25mm)	-0.99" (-25.15mm)	28th Driest	Driest since: 2000	1956
Mar–Sep 2006 7-Month	17.76" (451.10mm)	18.75" (476.25mm)	-0.99" (-25.15mm)	101st Wettest	Wettest since: 2005	1973
Feb–Sep 2006 8-Month	19.28" (489.71mm)	20.88" (530.35mm)	-1.60" (-40.64mm)	19th Driest	Driest since: 2002	1930
Feb–Sep 2006 8-Month	19.28" (489.71mm)	20.88" (530.35mm)	-1.60" (-40.64mm)	110th Wettest	Wettest since: 2005	2019
Jan–Sep 2006 9-Month	21.89" (556.01mm)	23.20" (589.28mm)	-1.31" (-33.27mm)	26th Driest	Driest since: 2002	1934
Jan–Sep 2006 9-Month	21.89" (556.01mm)	23.20" (589.28mm)	-1.31" (-33.27mm)	103rd Wettest	Wettest since: 2005	2019
Dec 2005–Sep 2006 10-Month	24.18" (614.17mm)	25.54" (648.72mm)	-1.36" (-34.55mm)	28th Driest	Driest since: 2002	1931
Dec 2005–Sep 2006 10-Month	24.18" (614.17mm)	25.54" (648.72mm)	-1.36" (-34.55mm)	100th Wettest	Wettest since: 2005	2019
Nov 2005–Sep 2006 11-Month	26.40" (670.56mm)	27.77" (705.36mm)	-1.37" (-34.80mm)	31st Driest	Driest since: 2002	1934
Nov 2005–Sep 2006 11-Month	26.40" (670.56mm)	27.77" (705.36mm)	-1.37" (-34.80mm)	97th Wettest	Wettest since: 2005	2019
Oct 2005–Sep 2006 12-Month	28.77" (730.76mm)	29.94" (760.48mm)	-1.17" (-29.72mm)	33rd Driest	Driest since: 2002	1934
Oct 2005–Sep 2006 12-Month	28.77" (730.76mm)	29.94" (760.48mm)	-1.17" (-29.72mm)	95th Wettest	Wettest since: 2005	2019
Apr 2005–Sep 2006 18-Month	44.87" (1,139.70mm)	46.20" (1,173.48mm)	-1.33" (-33.78mm)	40th Driest	Driest since: 2002	1931
Apr 2005–Sep 2006 18-Month	44.87" (1,139.70mm)	46.20" (1,173.48mm)	-1.33" (-33.78mm)	88th Wettest	Wettest since: 2005	2019
Oct 2004–Sep 2006 24-Month	60.37" (1,533.40mm)	59.92" (1,521.97mm)	0.45" (11.43mm)	63rd Driest	Driest since: 2003	1918
Oct 2004–Sep 2006 24-Month	60.37" (1,533.40mm)	59.92" (1,521.97mm)	0.45" (11.43mm)	64th Wettest	Wettest since: 2005	2020
Oct 2003–Sep 2006 36-Month	91.98" (2,336.29mm)	89.87" (2,282.70mm)	2.11" (53.59mm)	83rd Driest	Driest since: 2004	1956
Oct 2003–Sep 2006 36-Month	91.98" (2,336.29mm)	89.87" (2,282.70mm)	2.11" (53.59mm)	43rd Wettest	Wettest since: 2005	2019
Oct 2002–Sep 2006 48-Month	123.68" (3,141.47mm)	119.78" (3,042.41mm)	3.90" (99.06mm)	97th Driest	Driest since: 2005	1956
Oct 2002–Sep 2006 48-Month	123.68" (3,141.47mm)	119.78" (3,042.41mm)	3.90" (99.06mm)	28th Wettest	Wettest since: 2000	2019
Oct 2001–Sep 2006 60-Month	151.59" (3,850.39mm)	149.66" (3,801.36mm)	1.93" (49.03mm)	72nd Driest	Driest since: 2004	1956
Oct 2001–Sep 2006 60-Month	151.59" (3,850.39mm)	149.66" (3,801.36mm)	1.93" (49.03mm)	52nd Wettest	Wettest since: 2005	2020

Citing This Page

NOAA National Centers for Environmental information, Climate at a Glance: National Rankings, published May 2023, retrieved on May 31, 2023 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/rankings