New 1981-2010 Climate Normals Released

On July 1, 2011 NOAA National Climatic Data Center (NCDC) released the 1981-2010 Normals, which replaces the 1971-2000 Normals.  Climate Normals are the latest three-decade averages of climatological variables, including temperature and precipitation, and are updated every 10 years.

In terms of differences for the entire U.S. between the latest Normals and the previous 30 year average, the 1981-2010 Normals are approximately 0.5 degree F warmer than the 1971-2000 period.  While changes from one installment of Normals to the next can provide some evidence of climate change impacts, care must be taken when interpreting changes between one Normals period and another, as there can be many factors that contribute to these differences.  Factors such as observing station moves, changes in observing practices, changes in instrumentation, etc. can all contribute to Normal period differences, and are not necessarily reflective of real changes in the underlying climate signal.

The monthly changes for North Platte and Valentine from the period 1971-2000 (Old Normals) to the
1981-2010 (New Normals) period are shown below.  Additional information can be found on the NCDC website at:    http://www.ncdc.noaa.gov/oa/climate/normals/newnormals.html

North Platte Average Highs
Month Old
Normals
New
Normals
Change
January 36.5 38.9 +2.4
February 43.3 43.0 -0.3
March 52.1 52.5 +0.4
April 62.7 62.2 -0.5
May 72.0 71.7 -0.3
June 82.6 81.8 -0.8
July 88.4 88.2 -0.2
August 86.8 86.1 -0.7
September 78.0 77.8 -0.2
October 65.6 64.5 -1.1
November 48.5 50.2 +1.7
December 39.2 39.1 -0.1
Annual 63.0 63.1 +0.1
 
Valentine Average Highs
Month Old
Normals
New
Normals
Change
January 33.8 36.5 +2.7
February 39.4 40.0 +0.6
March 48.4 49.3 +0.9
April 59.8 60.3 +0.5
May 71.2 70.9 -0.3
June 81.9 81.1 -0.8
July 88.3 88.7 +0.4
August 86.9 87.0 +0.1
September 77.2 77.3 +0.1
October 63.5 63.0 -0.5
November 45.9 47.7 +1.8
December 36.7 36.6 -0.1
Annual 61.1 61.6 +0.5
North Platte Average Lows
Month Old
Normals
New
Normals
Change
January 9.9 11.1 +1.2
February 15.4 15.0 -0.4
March 23.8 23.5 -0.3
April 33.4 33.0 -0.4
May 44.5 44.1 -0.4
June 54.2 54.0 -0.2
July 60.2 60.4 +0.2
August 58.4 58.2 -0.2
September 46.7 46.8 +0.1
October 33.7 33.6 -0.1
November 20.7 21.0 +0.3
December 12.1 11.6 -0.5
Annual 34.4 34.5 +0.1
 
Valentine Average Lows
Month Old
Normals
New
Normals
Change
January 7.8 10.7 +2.9
February 13.7 14.4 +0.7
March 22.1 23.1 +1.0
April 32.4 33.0 +0.6
May 43.7 44.3 +0.6
June 53.2 54.0 +0.8
July 59.1 60.4 +1.3
August 57.3 58.7 +1.4
September 45.8 47.4 +1.6
October 33.1 33.9 +0.8
November 20.1 21.2 +1.1
December 10.5 11.0 +0.5
Annual 33.2 34.4 +1.2
North Platte Average Temperatures
Month Old
Normals
New
Normals
Change
January 23.2 25.0 +1.8
February 29.4 29.0 -0.4
March 38.0 38.0 0.0
April 48.1 47.6 -0.5
May 58.3 57.9 -0.4
June 68.4 67.9 -0.5
July 74.3 74.3 0.0
August 72.6 72.1 -0.5
September 62.4 62.3 -0.1
October 49.7 49.1 -0.6
November 34.6 35.6 +1.0
December 25.7 25.4 -0.3
Annual 48.7 48.8 +0.1
 
Valentine Average Temperatures
Month Old
Normals
New
Normals
Change
January 20.8 23.6 +2.8
February 26.6 27.2 +0.6
March 35.3 36.2 +0.9
April 46.1 46.7 +0.6
May 57.5 57.6 +0.1
June 67.6 67.5 -0.1
July 73.7 74.5 +0.8
August 72.1 72.8 +0.7
September 61.5 62.3 +0.8
October 48.3 48.5 +0.2
November 33.0 34.4 +1.4
December 23.6 23.8 +0.2
Annual 47.2 48.0 +0.8
North Platte Precipitation
Month Old
Normals
New
Normals
Change
January 0.39 0.34 -0.05
February 0.51 0.50 -0.01
March 1.24 1.05 -0.19
April 1.97 2.27 +0.30
May 3.34 3.28 -0.06
June 3.17 3.42 +0.25
July 3.17 3.07 -0.10
August 2.15 2.29 +0.14
September 1.32 1.41 +0.09
October 1.24 1.55 +0.31
November 0.76 0.64 -0.12
December 0.40 0.41 +0.01
Annual 19.66 20.23 +0.57
 
Valentine Precipitation
Month Old
Normals
New
Normals
Change
January 0.30 0.26 -0.04
February 0.48 0.48 0.00
March 1.11 1.07 -0.04
April 1.97 2.22 +0.25
May 3.20 3.13 -0.07
June 3.01 3.56 +0.55
July 3.37 3.21 -0.16
August 2.20 2.18 -0.02
September 1.61 1.64 +0.03
October 1.22 1.25 +0.03
November 0.72 0.65 -0.07
December 0.33 0.37 +0.04
Annual 19.52 20.02 +0.50
North Platte Snowfall
Month Old
Normals
New
Normals
Change
January 5.0 4.8 -0.2
February 4.7 5.3 +0.6
March 4.8 4.4 -0.4
April 2.8 3.2 +0.4
May 0.0 0.0 0.0
June 0.0 0.0 0.0
July 0.0 0.0 0.0
August 0.0 0.0 0.0
September 0.2 0.2 0.0
October 1.0 2.1 +1.1
November 4.9 3.9 -1.0
December 4.4 4.6 +0.2
Annual 27.8 28.5 +0.7
 
Valentine Snowfall
Month Old
Normals
New
Normals
Change
January 4.8 3.8 -1.0
February 6.2 5.6 -0.6
March 8.1 6.5 -1.6
April 4.4 4.6 +0.2
May 0.1 0.1 0.0
June 0.0 0.0 0.0
July 0.0 0.0 0.0
August 0.0 0.0 0.0
September 0.7 0.7 0.0
October 1.5 1.5 0.0
November 6.3 5.4 -0.9
December 4.8 5.1 +0.3
Annual 36.9 33.3 -3.6

 

  Page composition by
Matt Masek
August 2011
 

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.