GROTTO, WASHINGTON

Monthly Total Heating Degree Days

(453386)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 196912
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
Months with 5 missing days or less use mean for missing day(s)
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.


YEAR(S	JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP	OCT		NOV	DEC		ANN
1955	0.00	z	0.00	z	0.00	z	0.00	z	0.00	z	0.00	z	0.00	z	0.00	z	242.00	496.00		928.00	972.88	a	2638.88
1956	956.50		966.50		860.25	a	499.29	b	269.00		267.50		102.50		122.00		294.00	606.00		690.00	856.50		6490.04
1957	1104.00		792.50		704.50		470.50		241.28	a	158.00		127.00		137.00		103.50	479.00		688.00	789.47	a	5794.75
1958	784.50		540.00		659.00		498.50		175.50		97.00		14.00		25.00		229.00	341.50		761.50	722.00		4847.50
1959	908.50		731.00		727.00		505.50		383.50		174.00		76.50		132.50		260.00	432.00		718.50	820.00		5869.00
1960	929.50		762.50		688.50		490.50		396.50		212.50		72.00		148.00		201.50	399.00		704.00	813.00		5817.50
1961	737.50		678.50		667.50		542.00		339.00		116.00		68.00		25.00		277.50	503.50		769.50	899.50		5623.50
1962	928.00		677.50		743.00		444.50		443.50		233.79	a	141.00		101.50		145.50	394.00		631.00	802.50		5685.79
1963	999.50		545.00		683.50		542.50		322.00		242.59	a	124.50		75.50		92.00	390.27	c	699.00	808.50		5524.85
1964	892.50		777.50		758.50		602.00		394.00		210.50		108.00		157.50		271.50	326.00		756.50	1010.00		6264.50
1965	885.50		776.00		658.00		443.50		414.50		191.50		64.00		76.00		253.50	319.50		593.00	894.50		5569.50
1966	915.50		725.00		671.00		491.00		323.00		216.50		101.00		66.00		110.50	434.50		653.50	775.00		5482.50
1967	861.00		698.50		771.00		568.00		338.00		110.00		39.50		16.00		85.00	427.50		623.50	921.00		5459.00
1968	909.50		608.00		615.00		593.50		350.50		219.50		93.00		142.50		242.00	508.50		706.00	1049.50		6037.50
1969	1145.50		799.50		698.50		536.00		265.50		117.32	b	139.50	a	171.50		218.00	495.00		622.00	823.50		6031.82


Period of Record Statistics
MEAN	925.54		719.86		707.52		516.23		332.56		183.34		90.75		99.71		201.70	436.82		702.93	863.86		5749.84
S.D.	107.22		111.04		61.35		49.84		74.22		55.23		37.42		52.68		73.80	79.08		82.20	92.49		398.97
SKEW	0.45		0.21		0.98		0.24		-0.52		-0.28		-0.44		-0.35		-0.50	0.29		1.22	0.60		-0.26
MAX	1145.50		966.50		860.25		602.00		443.50		267.50		141.00		171.50		294.00	606.00		928.00	1049.50		6490.04
MIN	737.50		540.00		615.00		443.50		175.50		97.00		14.00		16.00		85.00	319.50		593.00	722.00		4847.50
NO YRS	14		14		14		14		14		14		14		14		15	15		15	15		14