April weather wrap-up - Tucson News Now

April weather wrap-up

Posted: Updated:

The below information is from the Tucson National Weather Service.

April 2013 climate report for Tucson

 

Headlines
10th warmest April on record (tied with 2012)
Spring 2013, 2nd warmest on record so far
Drought conditions deteriorate to severe levels
 

April 2013 goes into the record books as the 10th warmest on record, tied with last year, with an average temperature of 69.8°. April 2011 was a tenth of a degree cooler and when you combine the last three April's, the average temperature of 69.8° ranks as the third warmest three consecutive April's on record.

 
Warmest 3 consecutive April's on record
 
April years
Average
Average temperatures
1)
1987-1989
70.6°
1987 (70.1°), 1988 (67.9°), 1989 (73.8°)
2)
1988-1990
70.5°
1988 (67.9°), 1989 (73.8°), 1990 (69.7°)
3)
2011-2013
69.8°
2011 (67.7°), 2012 (67.8°), 2013 (67.8°)
4T)
2000-2002
69.6°
2000 (70.6°), 2001 (66.6°), 2002 (71.6°)
4T)
1989-1991
69.6°
1989 (73.8°), 1990 (69.7°), 1991 (65.2°)
April normal temperature (1981-2010) - 67.0°
 

The month started off dry with above normal temperatures. A Pacific weather system moved through the area on the 8th and 9th and brought widespread rain and mountain snow. Daytime temperatures were much cooler on the 9th and 10th with highs in the mid to upper 60s.

 

The next seven days were dry and warm before another Pacific storm moved through the area. This storm was dry but it did lowered the daytime temperatures into the upper 60s to the lower 70s.

 

The remainder of the month continued to be dry but was much warmer with highs mostly in the mid 80s to the mid 90s.

 

Temperature extremes for the month ranged from a high of 97° on the 29th to a low of 42° on the 19th. The monthly average temperature of 69.8° is 2.8° above normal and ranks as the 10th warmest April on record, tied with 2012.

 
April 2013 daily high temperature departure from normal April 2013 daily low temperature departure from normal
Click on image above for larger view
 

Rainfall amounts across the metro area for the month, using several sources like rainlog.org, thePima County Regional Flood Control District gages and CoCoRaHS, ranged from a 0.10" to 0.60". The International airport, which is the official recording location for Tucson, recorded just over a tenth of an inch /0.12"/, which is two-tenths of an inch below normal. This goes into the record books as the 51st driest April on record, tied with 1896, 1966 and 2012

 
April 2013 stats
Month
Normal
Departure
Historical ranking
Average high temperature
85.0°
82.1°
+ 2.9°
18th warmest
Average low temperature
54.6°
52.0°
+ 2.6°
7th warmest
Average temperature
69.8°
67.0°
+ 2.8°
10th warmest
Rainfall
0.12"
0.31"
- 0.19"
51st driest
Historical period of record (1895-2013)

Spring 2013 (so far)

Two-thirds of Spring 2013 is in the books and its been a very warm one for Tucson. The average temperature so far of 67.7° ranks as the 2nd warmest on record. Rainfall across the metro area for generally ranged from 0.05" to 0.50" with localized totals up to 1.00" on the northwest side of the metro area. Officially, the airport has recorded only 0.13" which ranks as the 9th driestMarch/April period on record (tied with 1897).

 
Spring 2013 stats (March-April)
Year
Normal
Departure
Average high temperature
82.9°
78.1°
+ 4.8°
Average low temperature
52.5°
49.1°
+ 3.4°
Average temperature
67.7°
63.6°
+ 4.1°
Rainfall
0.13"
1.04"
- 0.91"

Warmest March/April period on record - 69.4° in 1989
Driest March/April period on record - Trace in 1895

2013

The first four months of 2013 goes into the record books as the 24th warmest on record, tied with 1997 & 2004, with an average temperature of 59.2° which is 0.3° above normal. Rainfall across the metro area for 2013 so far ranged from 0.40" to 2.30" with the higher amounts near the mountains. Officially, the airport has recorded 1.73" which ranks as the 37th driest January thru April period on record.

 
2013 stats thru April
Year
Normal
Departure
Average high temperature
73.5°
72.7°
+ 0.8°
Average low temperature
44.9°
45.1°
- 0.2°
Average temperature
59.2°
58.9°
+ 0.3°
Rainfall
1.73"
2.84"
- 1.11"
2012-13 Water Year rainfall (Oct-Apr)
2.94"
5.23"
- 2.29"

Warmest January thru April period on record - 62.2° in 1986
Driest January thru April period on record - 0.01" in 1972

Looking ahead into May
The Climate Prediction Center forecasts slightly enhanced probabilities for above normal temperatures and equal chances for either above normal, normal or below normal rainfall.
  Daily normals | Daily records
Normal monthly high temperature 91.6°
Normal monthly low temperature 60.5°
Normal monthly temperature 76.0°
Record high temperature 111° on May 29, 1910
Record low temperature 32° on May 3, 1899
Warmest May (avg.) 80.2° in 2000
Coldest May (avg.) 64.6° in 1905
Normal rainfall 0.23"
Wettest May day 1.34" on May 15, 1931
Wettest May 1.34" in 1931
Driest May 0.00" in 2011 (last of 23 occurrences)
   
The number of daylight hours will increase from 13 hours 28 minutes on the 1st to 14 hours 7 minutes on the 31st, a gain of 39 minutes.
Powered by WorldNow