Was July, 1901 The Hottest Month In US History?

USHCN “raw” monthly data shows that July, 1901 was the hottest month in US history – ahead of 1936 and third place 2012.

July of 1901 was a very hot month. Look at all the USHCN stations which were over 110 degrees on July 22, 1901. That day was much hotter than any day in 2012.

       Missouri	  MARBLE HILL    	 7/22/1901	116
       Missouri	  JEFFERSON CITY 	 7/22/1901	113
       Missouri	  WARRENTON 1 N  	 7/22/1901	113
        Arizona	  PARKER         	 7/22/1901	112
       Illinois	  ANNA 2 NNE     	 7/22/1901	112
       Illinois	  MT VERNON 3 NE 	 7/22/1901	112
        Indiana	  SALEM          	 7/22/1901	112
       Missouri	  MEXICO         	 7/22/1901	112
       Missouri	  UNIONVILLE     	 7/22/1901	112
       Illinois	  CARLINVILLE    	 7/22/1901	111
       Illinois	  HARRISBURG     	 7/22/1901	111
       Illinois	  SPARTA 1 W     	 7/22/1901	111
        Indiana	  COLUMBUS       	 7/22/1901	111
        Indiana	  OOLITIC PURDUE 	 7/22/1901	111
        Indiana	  PAOLI          	 7/22/1901	111
        Indiana	  PRINCETON 1 W  	 7/22/1901	111
       Missouri	  LEXINGTON 3E   	 7/22/1901	111
       Illinois	  MCLEANSBORO    	 7/22/1901	110
           Iowa	  ALBIA 3 NNE    	 7/22/1901	110
         Kansas	  COLUMBUS       	 7/22/1901	110
       Missouri	  APPLETON CITY  	 7/22/1901	110
       Missouri	  STEFFENVILLE   	 7/22/1901	110
        Montana	  GLENDIVE       	 7/22/1901	110
      Tennessee	  DOVER 1 W      	 7/22/1901	110
      Wisconsin	  PRAIRIE DU CHIE	 7/22/1901	110

       Illinois	  DECATUR WTP    	 7/22/1901	109
       Illinois	  JACKSONVILLE 2E	 7/22/1901	109
        Indiana	  SCOTTSBURG     	 7/22/1901	109
           Iowa	  CLARINDA       	 7/22/1901	109
           Iowa	  INDIANOLA 2W   	 7/22/1901	109
           Iowa	  LOGAN          	 7/22/1901	109
         Kansas	  OLATHE 3E      	 7/22/1901	109
         Kansas	  OTTAWA         	 7/22/1901	109
       Kentucky	  HOPKINSVILLE   	 7/22/1901	109
       Nebraska	  AUBURN 5 ESE   	 7/22/1901	109
       Arkansas	  CORNING        	 7/22/1901	108
       Illinois	  OLNEY 2S       	 7/22/1901	108
        Indiana	  RUSHVILLE      	 7/22/1901	108
           Iowa	  MT AYR         	 7/22/1901	108
           Iowa	  TOLEDO 3N      	 7/22/1901	108
         Kansas	  HORTON         	 7/22/1901	108
         Kansas	  LEAVENWORTH    	 7/22/1901	108
         Kansas	  MANHATTAN      	 7/22/1901	108
       Kentucky	  BOWLING GREEN R	 7/22/1901	108
       Nebraska	  ASHLAND NO 2   	 7/22/1901	108
       Nebraska	  FAIRBURY 5S    	 7/22/1901	108
       Nebraska	  GENEVA         	 7/22/1901	108
   South Dakota	  MENNO          	 7/22/1901	108
   South Dakota	  VERMILLION 2 SE	 7/22/1901	108
       Arkansas	  POCAHONTAS 1   	 7/22/1901	107
       Illinois	  HILLSBORO      	 7/22/1901	107
       Illinois	  LA HARPE       	 7/22/1901	107
       Illinois	  MONMOUTH       	 7/22/1901	107
       Illinois	  PANA 3E        	 7/22/1901	107
           Iowa	  FORT DODGE 5NNW	 7/22/1901	107
         Kansas	  ATCHISON       	 7/22/1901	107
         Kansas	  LAWRENCE       	 7/22/1901	107
       Kentucky	  GREENSBURG     	 7/22/1901	107
       Kentucky	  HENDERSON 8 SSW	 7/22/1901	107
       Kentucky	  SHELBYVILLE 1 E	 7/22/1901	107
       Missouri	  LAMAR          	 7/22/1901	107
   North Dakota	  DICKINSON EXP S	 7/22/1901	107
       Oklahoma	  ENID           	 7/22/1901	107
   South Dakota	  ABERDEEN RGNL A	 7/22/1901	107
   South Dakota	  GANN VALLEY 4NW	 7/22/1901	107
      Tennessee	  UNION CITY     	 7/22/1901	107
       Arkansas	  PINE BLUFF     	 7/22/1901	106
       Illinois	  ALEDO          	 7/22/1901	106
        Indiana	  CAMBRIDGE CITY 	 7/22/1901	106
        Indiana	  MADISON SEWAGE 	 7/22/1901	106
           Iowa	  MT PLEASANT 1 S	 7/22/1901	106
           Iowa	  WASHINGTON     	 7/22/1901	106
         Kansas	  HAYS 1 S       	 7/22/1901	106
         Kansas	  INDEPENDENCE   	 7/22/1901	106
         Kansas	  MINNEAPOLIS    	 7/22/1901	106
       Missouri	  CARUTHERSVILLE 	 7/22/1901	106
       Nebraska	  BEAVER CITY    	 7/22/1901	106
       Nebraska	  HARTINGTON     	 7/22/1901	106
       Nebraska	  TECUMSEH 1S    	 7/22/1901	106
       Nebraska	  TEKAMAH        	 7/22/1901	106
       Nebraska	  WAKEFIELD      	 7/22/1901	106
   South Dakota	  CANTON         	 7/22/1901	106
   South Dakota	  FORESTBURG 3 NE	 7/22/1901	106
       Arkansas	  CONWAY         	 7/22/1901	105
       Arkansas	  GRAVETTE       	 7/22/1901	105
     California	  LEMON COVE     	 7/22/1901	105
       Illinois	  PALESTINE      	 7/22/1901	105
        Indiana	  GREENCASTLE 1 W	 7/22/1901	105
        Indiana	  SEYMOUR 2 N    	 7/22/1901	105
        Indiana	  VEVAY          	 7/22/1901	105
        Indiana	  WASHINGTON 1 W 	 7/22/1901	105
           Iowa	  FAYETTE        	 7/22/1901	105
         Kansas	  MCPHERSON      	 7/22/1901	105
         Kansas	  SEDAN          	 7/22/1901	105
       Missouri	  LEBANON 2W     	 7/22/1901	105
       Nebraska	  GENOA 2 W      	 7/22/1901	105
       Nebraska	  HEBRON         	 7/22/1901	105
       Nebraska	  SYRACUSE       	 7/22/1901	105
       Nebraska	  YORK           	 7/22/1901	105
           Ohio	  WAVERLY        	 7/22/1901	105
       Oklahoma	  CLAREMORE 2 ENE	 7/22/1901	105
       Oklahoma	  TAHLEQUAH      	 7/22/1901	105
      Wisconsin	  BRODHEAD       	 7/22/1901	105
       Arkansas	  NEWPORT        	 7/22/1901	104
       Arkansas	  SUBIACO        	 7/22/1901	104
       Illinois	  DANVILLE       	 7/22/1901	104
        Indiana	  ANDERSON SEWAGE	 7/22/1901	104
        Indiana	  DELPHI 2 N     	 7/22/1901	104
        Indiana	  MT VERNON      	 7/22/1901	104
        Indiana	  ROCKVILLE      	 7/22/1901	104
        Indiana	  WINAMAC 2SSE   	 7/22/1901	104
           Iowa	  LE MARS        	 7/22/1901	104
           Iowa	  STORM LAKE 2 E 	 7/22/1901	104
         Kansas	  MEDICINE LODGE 	 7/22/1901	104
       Missouri	  CONCEPTION     	 7/22/1901	104
       Missouri	  NEOSHO         	 7/22/1901	104
        Montana	  CHINOOK        	 7/22/1901	104
       Nebraska	  CRETE          	 7/22/1901	104
       Nebraska	  DAVID CITY     	 7/22/1901	104
       Nebraska	  HOLDREGE       	 7/22/1901	104
       Nebraska	  SEWARD         	 7/22/1901	104
       Oklahoma	  PAWHUSKA       	 7/22/1901	104
      Tennessee	  CLARKSVILLE WWT	 7/22/1901	104
           Utah	  CORINNE        	 7/22/1901	104
       Arkansas	  FAYETTEVILLE EX	 7/22/1901	103
       Illinois	  MINONK         	 7/22/1901	103
       Illinois	  MT CARROLL     	 7/22/1901	103
       Illinois	  OTTAWA 5SW     	 7/22/1901	103
       Illinois	  WALNUT         	 7/22/1901	103
        Indiana	  MARION 2 N     	 7/22/1901	103
        Indiana	  WHITESTOWN     	 7/22/1901	103
           Iowa	  CHARLES CITY   	 7/22/1901	103
           Iowa	  ESTHERVILLE 2 N	 7/22/1901	103
           Iowa	  FOREST CITY 2 N	 7/22/1901	103
           Iowa	  ROCKWELL CITY  	 7/22/1901	103
       Kentucky	  LEITCHFIELD 2 N	 7/22/1901	103
    Mississippi	  STATE UNIV     	 7/22/1901	103
       Missouri	  BRUNSWICK      	 7/22/1901	103
       Nebraska	  FAIRMONT       	 7/22/1901	103
       Nebraska	  OAKDALE        	 7/22/1901	103
       Nebraska	  RED CLOUD      	 7/22/1901	103
   North Dakota	  NAPOLEON       	 7/22/1901	103
   North Dakota	  NEW ENGLAND    	 7/22/1901	103
           Ohio	  BUCYRUS        	 7/22/1901	103
       Oklahoma	  JEFFERSON      	 7/22/1901	103
       Oklahoma	  MEEKER 5 W     	 7/22/1901	103
   South Dakota	  ALEXANDRIA     	 7/22/1901	103
   South Dakota	  MELLETTE 4 W   	 7/22/1901	103
        Arizona	  BUCKEYE        	 7/22/1901	102
          Idaho	  PAYETTE        	 7/22/1901	102
       Illinois	  DIXON 1 NW     	 7/22/1901	102
       Illinois	  MORRISON       	 7/22/1901	102
       Illinois	  PARIS WTR WKS  	 7/22/1901	102
           Iowa	  BELLE PLAINE   	 7/22/1901	102
           Iowa	  CLINTON #1     	 7/22/1901	102
           Iowa	  IOWA FALLS     	 7/22/1901	102
           Iowa	  NEW HAMPTON    	 7/22/1901	102
       Kentucky	  BEREA COLLEGE  	 7/22/1901	102
      Minnesota	  GRAND MEADOW   	 7/22/1901	102
    Mississippi	  WATER VALLEY   	 7/22/1901	102
       Nebraska	  MADISON        	 7/22/1901	102
       Nebraska	  MINDEN         	 7/22/1901	102
           Ohio	  CIRCLEVILLE    	 7/22/1901	102
           Ohio	  DELAWARE       	 7/22/1901	102
           Ohio	  HILLSBORO      	 7/22/1901	102
           Ohio	  PORTSMOUTH-SCIO	 7/22/1901	102
       Oklahoma	  NEWKIRK 1NW    	 7/22/1901	102
       Oklahoma	  PERRY          	 7/22/1901	102
       Oklahoma	  STILLWATER 2 W 	 7/22/1901	102
       Oklahoma	  WEBBERS FALLS 5	 7/22/1901	102
   South Dakota	  FAULKTON 1 NW  	 7/22/1901	102
   South Dakota	  HIGHMORE 1 W   	 7/22/1901	102
           Utah	  FILLMORE       	 7/22/1901	102
      Wisconsin	  DARLINGTON     	 7/22/1901	102
     California	  PASO ROBLES    	 7/22/1901	101
           Iowa	  ALGONA 3 W     	 7/22/1901	101
    Mississippi	  BATESVILLE 2 SW	 7/22/1901	101
    Mississippi	  HERNANDO       	 7/22/1901	101
    Mississippi	  KOSCIUSKO      	 7/22/1901	101
       Nebraska	  IMPERIAL       	 7/22/1901	101
       Nebraska	  NORTH LOUP     	 7/22/1901	101
       Nebraska	  SAINT PAUL 4N  	 7/22/1901	101
           Ohio	  GREENVILLE WTP 	 7/22/1901	101
           Ohio	  UPPER SANDUSKY 	 7/22/1901	101
       Oklahoma	  GUTHRIE 5S     	 7/22/1901	101
       Oklahoma	  KENTON         	 7/22/1901	101
       Oklahoma	  KINGFISHER     	 7/22/1901	101
   South Dakota	  ACADEMY 2NE    	 7/22/1901	101
      Tennessee	  WAYNESBORO     	 7/22/1901	101
          Texas	  HASKELL        	 7/22/1901	101
           Utah	  ST GEORGE      	 7/22/1901	101
      Wisconsin	  LANCASTER 4 WSW	 7/22/1901	101
        Arizona	  TUCSON WFO     	 7/22/1901	100
       Arkansas	  BRINKLEY       	 7/22/1901	100
       Arkansas	  MENA           	 7/22/1901	100
     California	  HEALDSBURG     	 7/22/1901	100
          Idaho	  ASHTON 1N      	 7/22/1901	100
          Idaho	  OAKLEY         	 7/22/1901	100
         Kansas	  SCOTT CITY     	 7/22/1901	100
      Minnesota	  NEW ULM 2 SE   	 7/22/1901	100
       Nebraska	  BROKEN BOW 2 W 	 7/22/1901	100
       Nebraska	  CURTIS 3NNE    	 7/22/1901	100
   North Dakota	  FULLERTON 1 ESE	 7/22/1901	100
           Ohio	  KENTON         	 7/22/1901	100
       Oklahoma	  PAULS VALLEY 4 	 7/22/1901	100
   South Dakota	  HOWARD         	 7/22/1901	100
      Tennessee	  LEWISBURG EXP S	 7/22/1901	100
          Texas	  BLANCO         	 7/22/1901	100
      Wisconsin	  PORTAGE        	 7/22/1901	100

About Tony Heller

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10 Responses to Was July, 1901 The Hottest Month In US History?

  1. GevenStoddard says:

    You don’t look at ‘raw’ data anyway. Not all stations are equally distributed so stations are given a specific weight based on how near they are to another station. For example, in 1901, you likely had 3 times as many stations in the East as you did out West. So, an equal heat wave out West versus the East would be heavily weighted more in the East.

    You simply can’t just do a raw average of all the stations divided by the number of stations because in some cases you might have a dozen readings in a nearby location in spite of it being in the middle of a highly localized heat wave.

    • USHCN stations are intentionally distributed relatively evenly, and any weighting that is used has almost no effect on the final temperature. My averages comne out within a few hundredths of a degree of what they publish

      You have no idea what you are talking about and have done no research, but you love to speculate boldly

      • GevenStoddard says:

        No they aren’t:
        http://cdiac.ornl.gov/epubs/ndp/ushcn/monthly_doc.html

        That isn’t intentionally distributed evenly. It looks like you haven’t done the research.

        • NCDC reported that July was 77.6 degrees. Averaging all the USHCN monthly data gives 77.6 degrees.

          How much adjustment is required to make 77.6 degrees equal 77.6 degrees?

      • GevenStoddard says:

        Chery picking data much?

        Why don’t you cite your sources and show your work? How do I know you’re just not picking one month that is equal instead of comparing them month after month?

        If you say they are equal, then prove it. Show the data for all months and all years. Show your calculation. Show your data.

      • You want me to post the math for averaging several million temperature records?

        I have published the code here and discussed it extensively. You are just another lazy moron who shows up and blusters without putting any thought or effort into checking the facts of what you are saying.

  2. Andy DC says:

    It is pure, uncontaminated data, unaffected by any nutcase agenda. That is far more than you can say at present.

  3. rayvd says:

    At the very least it begs the question of why was it so hot back then? Same reason it is now — sometimes it’s hot, sometimes it’s not… why do we try and overcomplicate things?

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