Temperatures

Weather temperatures were usually recorded from a pair of thermometers, one with a marker for the maximum achieved, the other with a marker for the minimum achieved. Sometimes a "wet bulb" thermometer is used to calculate "dew point", the temperature at which precipitation begins. As they are delicate instruments, likely to break with rough handling, temperature record gaps may result from breakage. Mercury and alcohol thermometers also have a low temperature limit below which they must be taken inside; this may contribute to winter data gaps.

A table shows the number of Days for which a complete record was made each month followed by the maximum (Max Obs) and minimum (Min Obs) observed temperatures for the month.  In the next two columns are the maximum (Max Rec) and minimum (Min Rec) recorded (not observed) temperatures for the month. The final four columns show the Date of the greatest daily change (Range) for each month along with the maximum (Day Max) and minimum (Day Min) for that day. A second table gives the same data converted to Celcius.

Temperature table in Farenheit
March 1921 shows 19 days of records but only 11 have a minimum recorded temperature.
No records were kept for September and October 1920 or for April and May 1921.

Month	Days	Max Obs	Min Obs	Max Rec	Min Rec	Date	Range	Day Max	Day Min
May	28	48.0	30.0	54.0	20.0	31	22.0	54.0	32.0
Jun	29	60.0	34.0	68.0	28.0	20	34.0	68.0	34.0
Jul	28	64.0	38.0	69.0	34.0	4	29.0	67.0	38.0
Aug	3	50.0	45.0	53.0	37.0	1	14.0	53.0	39.0
Nov	7	7.1	-22.3	11.8	-23.8	30	31.6	8.5	-23.1
Dec	28	16.3	-25.5	22.6	-25.9	5	39.8	18.9	-20.9
Jan	30	7.9	-35.1	10.6	-38.1	1	24.6	-1.2	-25.8
Feb	28	5.0	-37.3	8.5	-41.2	11	41.5	8.0	-33.5
Mar	19	8.2	-27.3	10.1	-29.5	10	31.0	2.5	-28.5