* Cool rain then big warm-up: Full Forecast *
T.S. Elliot's oft-quoted line "April is the cruelest month" failed to hold true for the D.C. metro region in 2010. More often than not, the weather was dry, warm, and tranquil rather than rainy, cold and tumultuous. In fact, 23 out 30 days were dry and about 2 out of every 3 days featured above average high temperatures. Overall, at Reagan National Airport, the temperature was 4.7 degrees above average for the month -- the 5th warmest on record. Rainfall was about half of average making for the driest April since 1991.
Here are excerpts from the National Weather Service's April climate summaries for the region's three airports (bold text indicates added emphasis)...
April 2010 featured temperatures well above normal...The second consecutive month to do so. The average April monthly temperature was 4.7 degrees above normal...which coincidentally matched the march departure from normal. It was the 5th warmest April on record and the warmest April since 1994.
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The first week of April 2010 was especially warm. With an average 7-day temperature of 67.6..it was the warmest first week in April ever...beating the April 1st-7th 1929 average temperature of 65.4.
Max temperatures of 90 degrees were recorded on both April 6th and 7th. This marked the earliest first occurrence of reaching 90 or higher in a calendar year since April 6th 1942 when the max hit 92. The earliest date on record to reach the 90s in Washington is March 22nd 1907 when the max temperature hit 93.
Min temperatures failed to drop below 40 in April for only the sixth time on record but for the fourth time since 1999.
April 2010 was dry with Washington recording only about half of the normal monthly precipitation. It was the 13th driest April on record and the driest April since 1991 when only 1.39 inches of rain was measured. This dry month snapped a streak of the last six Aprils all having above normal precipitation.
Temperatures this April were well above normal...the second consecutive month to do so. The average April monthly temperature was 6.1 degrees above normal...which coincidentally matched the March departure from normal.
The April 2010 monthly average temperature ranked 2nd warmest on record. The warmest April was 1994...when the monthly temperature then averaged 60.1 degrees. With March 2010 being the warmest march on record...the combined March-April 2010 average temperature of 54.3f ranks as the warmest March-April period in the 48 years of records at Dulles.
The first week of the month was especially warm. The average temperature the first week of the month was 67.7...beating the April 1st-7th 1988 average temperature of 60.4f.
Daily record max temperatures were broken for three consecutive days from April 5th-7th 2010. A max temperature of 86 on April 5th...93 on April 6th and 91 on April 7th broke the respective daily max temperature records of 83 set on April 5th 1985...86 set on April 6th 2005 and 84 set on April 7th 1991. It was the second consecutive April to feature three consecutive days of setting record max temperatures...last year daily records fell from April 25th-27th.
The max temperature of 93 recorded on April 6th was especially noteworthy as it marked the earliest first occurrence in a calendar year of 90 degrees or higher at Dulles and it also tied the highest max temperature ever recorded at Dulles during the month of April.
April 2010 was dry with Dulles receiving less than half of the normal monthly precipitation. This April was tied with 1968 for the 4th driest April on record and the driest April since 1985 when only 0.33 inches of rain was measured. This snapped a streak of the last six Aprils all having above normal precipitation.
April 2010 in Baltimore was the second consecutive month that featured temperatures well above normal. The combined March-April 2010 average temperature of 52.7 degrees ranks 10th warmest and the warmest since March-April 1977.
The monthly average maximum temperature was 69.7 degrees...which tied with 1976 as 6th warmest.
The first week of April 2010 was especially warm. The weekly average temperature of 64.6 was the warmest first week average on record to start April...barely beating the April 1st-7th 1929 average temperature of 64.5.
Two max temperature records were broken or tied in April. The max temperature of 84 on April 5th broke the previous daily max temperature record of 83 set on that date in 1942. The max of 90 on April 6th tied the daily max temperature record set in 1929.
Max temperatures of 90 were recorded on both April 6th and 7th. This tied for the second earliest first occurrence in a calendar of 90 degree temperatures. The earliest date on record to reach the 90s is march 29th 1945 when the max hit 90 degrees.
Precipitation in Baltimore was below normal for the month. It was the driest April since 2001 when only 1.32 inches was recorded. This dry month snapped a streak of the last six Aprils all with above normal precipitation.