USHCN Tmax – Coldest and Hottest July Histogram Will Surprise You!

The other day I noted that NOAA had July 1936 back on top. Now don’t take this post as an endorsement of the adjustments and infilling, but I thought I would check which years did stations set their hottest July and coldest July.

I am using USHCN Final Tmax monhtly data . From the file v2.5.0.20140627. (This is not necessarily all the data NOAA uses)

I don’t think the histogram of the hottest July will actually be a surprise. 216 stations had their hottest July in 1936.

But the coldest July histogram will surprise you. 1992 and 1993 tied with 148 stations each having the coldest July. A small subset of the stations at bottom.

USHCN Tmax Final Hottest July

USHCN Tmax Final Coldest July

I just picked the top 15 stations with the coldest July in 1992 and the hottest July in 1936. There are 92. The temperatures are in Celsius.

STATE Station NAME Coldest_Year Coldest_July Hottest_Year Hottest_July
IA USH00130133 ALGONA 3 W 1992 23.22 1936 35.98
IA USH00131402 CHARLES CITY 1992 24.18 1936 34.5
IA USH00132724 ESTHERVILLE 2 N 1992 23.06 1936 35.82
IA USH00132977 FOREST CITY 2 NNE 1992 23.69 1936 35.72
IA USH00132999 FORT DODGE 5NNW 1992 24.73 1936 36.1
IA USH00134063 INDIANOLA 2W 1992 26.57 1936 37.13
IA USH00134894 LOGAN 1992 26.56 1936 39.88
IA USH00135952 NEW HAMPTON 1992 23.38 1936 35.31
IA USH00137147 ROCK RAPIDS 1992 23.96 1936 37.48
IA USH00137161 ROCKWELL CITY 1992 24.81 1936 36.69
IA USH00137979 STORM LAKE 2 E 1992 23.85 1936 36.54
IA USH00138296 TOLEDO 3N 1992 24.82 1936 35.34
IL USH00115326 MARENGO 1992 24.66 1936 33.89
IL USH00118916 WALNUT 1992 24.94 1936 36.2
IN USH00122149 DELPHI 2 N 1992 26.5 1936 36.38

Here are a sample of 15 that have neither.

STATE Station NAME Coldest_Year Coldest_July Hottest_Year Hottest_July
AL USH00011084 BREWTON 3 SSE 1989 30.77 1902 36.71
AL USH00012813 FAIRHOPE 2 NE 1928 30.05 2000 34.93
AL USH00013160 GAINESVILLE LOCK 1916 30.25 1952 37.26
AL USH00013511 GREENSBORO 1967 28.49 1901 35.09
AL USH00015749 MUSCLE SHOALS AP 1967 29.59 1930 36.57
AL USH00017157 SAINT BERNARD 1967 27.33 1952 35.2
AL USH00017304 SCOTTSBORO 1906 29.21 1980 35.86
AL USH00017366 SELMA 1916 28.1 2000 36.65
AL USH00018178 THOMASVILLE 1916 29.87 1930 36.35
AL USH00018380 TUSCALOOSA ACFD 1889 29.5 1930 37.77
AL USH00018469 VALLEY HEAD 1967 28.31 1930 36.48
AR USH00031596 CONWAY 1989 27.83 1954 38.96
AR USH00031632 CORNING 1905 29.14 1930 38.45
AR USH00032356 EUREKA SPRINGS 3 WNW 1950 27.51 1980 38.65
AR USH00032444 FAYETTEVILLE EXP STN 1950 27.86 1954 38.03

2 thoughts on “USHCN Tmax – Coldest and Hottest July Histogram Will Surprise You!

  1. Noticing that you reference the Alabama stations in your second chart. Interesting that Paul Homewood found spurious warming in those stations by comparing January 1934 with January 2013

    The average was 1.34F added over that time frame.

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