Record envelope, standing records and threshold days for Mt Healthy Exp Farm (USC00335543), Ohio, United States, with 42 years of record.
Key Facts for Mt Healthy Exp Farm
Mt Healthy Exp Farm (USC00335543) is a weather station in Ohio, United States at 39.28 latitude and -84.57 longitude, 259 m (850 ft) above sea level.
The station reports from 1914 to 1955, 42 years of record.
1,464 records set at Mt Healthy Exp Farm still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Mt Healthy Exp Farm set a daily record low minimum temperature of -14.4 C (6.1 F) on 28 November 1955.
About the Station
Location: Ohio, United States, 39.28 latitude, -84.57 longitude.
Elevation: 259 m (850 ft).
Period of record: 1914 to 1955, 42 years.
Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Mt Healthy Exp Farm. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Mt Healthy Exp Farm, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
23.9 C (75.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-25.0 C (-13.0 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-8.9 C (16.0 F)
n/a
n/a
May
34.4 C (93.9 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
3.9 C (39.0 F)
n/a
n/a
Jul
42.8 C (109.0 F)
7.8 C (46.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
4.4 C (39.9 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-0.6 C (30.9 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-18.3 C (-0.9 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-26.7 C (-16.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mt Healthy Exp Farm still stand. 1936 holds the most, with 72.
Standing records at Mt Healthy Exp Farm by the year they were set
Year set
Standing records
1914
45
1915
37
1916
34
1917
63
1918
59
1919
29
1920
31
1921
42
1922
19
1923
23
1924
35
1925
58
1926
23
1927
44
1928
38
1929
50
1930
57
1931
26
1932
36
1933
32
1934
56
1935
31
1936
72
1937
23
1938
17
1939
29
1940
47
1941
36
1942
34
1943
31
1944
18
1945
30
1946
28
1947
26
1948
17
1949
20
1950
35
1951
37
1952
27
1953
22
1954
23
1955
24
All-Time Record Progression
1 new records
1 all-time records were set at Mt Healthy Exp Farm between 6 March 1945 and 6 March 1945. Each dot is a new record.
When Mt Healthy Exp Farm set new all-time records
Date
Kind
Detail
1945-03-06
Record daily precipitation
Record daily precipitation 115.6 mm (4.6 in)
Wettest Day of Each Month
Mar: 115.6 mm (4.6 in)
The wettest day on record for each calendar month at Mt Healthy Exp Farm. The most was 115.6 mm (4.6 in) on 6 March 1945.
Record daily precipitation for each month at Mt Healthy Exp Farm
Month
Record daily precipitation (mm)
Date
Jan
55.9 mm (2.2 in)
4 January 1950
Feb
57.2 mm (2.3 in)
22 February 1944
Mar
115.6 mm (4.6 in)
6 March 1945
Apr
96.5 mm (3.8 in)
19 April 1940
May
92.7 mm (3.6 in)
1 May 1929
Jun
88.9 mm (3.5 in)
27 June 1932
Jul
83.8 mm (3.3 in)
12 July 1923
Aug
76.2 mm (3.0 in)
9 August 1937
Sep
71.6 mm (2.8 in)
22 September 1955
Oct
71.1 mm (2.8 in)
27 October 1919
Nov
72.4 mm (2.9 in)
18 November 1938
Dec
66.3 mm (2.6 in)
24 December 1921
Period of Record Coverage
1914 to 1955
Complete yearUnder 90 percent of days
42 years of record at Mt Healthy Exp Farm, 1914 to 1955. 3 years have data for under 90 percent of days and are left out of rankings: 1914, 1919, 1950.
Cooler than the station meanWarmer than the station mean
One stripe for each of 36 complete years at Mt Healthy Exp Farm, 1915 to 1954. Blue stripes are years cooler than the station's own mean of 12.1 C (53.8 F); red stripes are warmer. The coolest year was 1917, at 10.2 C (50.4 F), and the warmest was 1921, at 14.1 C (57.4 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Mt Healthy Exp Farm as warming stripes, 1915 to 1954
Year
Annual mean temperature
Difference from the station mean
1915
11.7 C
-0.39 C
1916
12.0 C
-0.08 C
1917
10.2 C
-1.90 C
1918
11.5 C
-0.58 C
1920
11.7 C
-0.44 C
1921
14.1 C
+2.01 C
1922
13.1 C
+1.02 C
1923
12.1 C
-0.03 C
1924
10.8 C
-1.30 C
1925
12.1 C
-0.06 C
1926
11.1 C
-1.03 C
1927
12.1 C
-0.03 C
1928
11.3 C
-0.80 C
1929
10.9 C
-1.19 C
1931
13.1 C
+1.01 C
1932
12.3 C
+0.19 C
1933
12.7 C
+0.61 C
1934
12.5 C
+0.40 C
1935
11.7 C
-0.44 C
1936
12.0 C
-0.17 C
1937
11.4 C
-0.70 C
1938
12.9 C
+0.76 C
1940
11.2 C
-0.96 C
1941
12.6 C
+0.50 C
1942
12.0 C
-0.17 C
1943
11.7 C
-0.45 C
1944
12.3 C
+0.18 C
1945
11.6 C
-0.49 C
1946
12.9 C
+0.81 C
1947
11.5 C
-0.64 C
1948
12.0 C
-0.09 C
1949
13.4 C
+1.24 C
1951
12.1 C
-0.07 C
1952
12.9 C
+0.80 C
1953
13.5 C
+1.33 C
1954
13.3 C
+1.20 C
The annual mean temperature here has risen by 0.24 C (0.01 to 0.48) per decade over 1915 to 1954. In Fahrenheit: 0.44 F (0.01 to 0.87) per decade. The slope is a straight line fitted to 36 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Mt Healthy Exp Farm
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.24 C (0.01 to 0.48) per decade
0.44 F (0.01 to 0.87) per decade
1915 to 1954
36
Rise
Mean daily maximum
0.30 C (0.04 to 0.55) per decade
0.5 F (0.1 to 1.0) per decade
1915 to 1954
36
Rise
Mean daily minimum
0.2 C (-0.1 to 0.4) per decade
0.3 F (-0.1 to 0.8) per decade
1915 to 1954
36
Not clearly different from zero
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1914 to 1955
Yearly extremes at Mt Healthy Exp Farm: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.8 C (109.0 F)
1934
36.1 C (97.0 F)
42
Coldest night (TNn)
-27.2 C (-17.0 F)
1936
-20.0 C (-4.0 F)
42
Wettest day (Rx1day)
115.6 mm (4.6 in)
1945
66.6 mm (2.6 in)
42
Wettest five days (Rx5day)
165.2 mm (6.5 in)
1945
93.8 mm (3.7 in)
42
Longest dry spell (CDD)
36 days
1944
19 days
42
Hottest day (TXx)
The hottest day of the year at Mt Healthy Exp Farm, 1914 to 1955. The record is 42.8 C (109.0 F) in 1934, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Mt Healthy Exp Farm by year
Year
Hottest day (TXx)
1914
36.1 C (97.0 F)
1915
34.4 C (93.9 F)
1916
36.7 C (98.1 F)
1917
37.2 C (99.0 F)
1918
36.7 C (98.1 F)
1919
35.0 C (95.0 F)
1920
33.9 C (93.0 F)
1921
36.7 C (98.1 F)
1922
35.0 C (95.0 F)
1923
33.9 C (93.0 F)
1924
36.7 C (98.1 F)
1925
36.1 C (97.0 F)
1926
35.0 C (95.0 F)
1927
35.6 C (96.1 F)
1928
33.9 C (93.0 F)
1929
33.9 C (93.0 F)
1930
39.4 C (102.9 F)
1931
37.2 C (99.0 F)
1932
36.1 C (97.0 F)
1933
38.9 C (102.0 F)
1934
42.8 C (109.0 F)
1935
36.1 C (97.0 F)
1936
41.7 C (107.1 F)
1937
33.9 C (93.0 F)
1938
33.9 C (93.0 F)
1939
37.8 C (100.0 F)
1940
38.9 C (102.0 F)
1941
37.8 C (100.0 F)
1942
35.0 C (95.0 F)
1943
35.0 C (95.0 F)
1944
37.8 C (100.0 F)
1945
36.1 C (97.0 F)
1946
34.4 C (93.9 F)
1947
35.0 C (95.0 F)
1948
37.2 C (99.0 F)
1949
36.1 C (97.0 F)
1950
32.8 C (91.0 F)
1951
38.3 C (100.9 F)
1952
37.2 C (99.0 F)
1953
38.3 C (100.9 F)
1954
38.9 C (102.0 F)
1955
35.6 C (96.1 F)
Coldest night (TNn)
The coldest night of the year at Mt Healthy Exp Farm, 1914 to 1955. The record is -27.2 C (-17.0 F) in 1936, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at Mt Healthy Exp Farm by year
Year
Coldest night (TNn)
1914
-22.2 C (-8.0 F)
1915
-18.3 C (-0.9 F)
1916
-20.0 C (-4.0 F)
1917
-25.6 C (-14.1 F)
1918
-26.7 C (-16.1 F)
1919
-17.8 C (0.0 F)
1920
-20.6 C (-5.1 F)
1921
-12.8 C (9.0 F)
1922
-16.7 C (1.9 F)
1923
-18.3 C (-0.9 F)
1924
-22.8 C (-9.0 F)
1925
-22.2 C (-8.0 F)
1926
-23.3 C (-9.9 F)
1927
-18.9 C (-2.0 F)
1928
-20.6 C (-5.1 F)
1929
-22.2 C (-8.0 F)
1930
-25.6 C (-14.1 F)
1931
-13.3 C (8.1 F)
1932
-26.7 C (-16.1 F)
1933
-21.7 C (-7.1 F)
1934
-24.4 C (-11.9 F)
1935
-21.7 C (-7.1 F)
1936
-27.2 C (-17.0 F)
1937
-15.6 C (3.9 F)
1938
-16.7 C (1.9 F)
1939
-17.8 C (0.0 F)
1940
-25.6 C (-14.1 F)
1941
-15.6 C (3.9 F)
1942
-25.0 C (-13.0 F)
1943
-20.0 C (-4.0 F)
1944
-18.3 C (-0.9 F)
1945
-18.3 C (-0.9 F)
1946
-17.8 C (0.0 F)
1947
-18.3 C (-0.9 F)
1948
-21.1 C (-6.0 F)
1949
-15.0 C (5.0 F)
1950
-17.8 C (0.0 F)
1951
-25.0 C (-13.0 F)
1952
-15.0 C (5.0 F)
1953
-17.2 C (1.0 F)
1954
-15.0 C (5.0 F)
1955
-20.6 C (-5.1 F)
Wettest day (Rx1day)
The wettest day of the year at Mt Healthy Exp Farm, 1914 to 1955. The record is 115.6 mm (4.6 in) in 1945, marked on the chart; the median year is 66.6 mm (2.6 in).
Wettest day (Rx1day) at Mt Healthy Exp Farm by year
Year
Wettest day (Rx1day)
1914
71.1 mm (2.8 in)
1915
54.9 mm (2.2 in)
1916
36.8 mm (1.4 in)
1917
59.2 mm (2.3 in)
1918
71.1 mm (2.8 in)
1919
71.1 mm (2.8 in)
1920
87.6 mm (3.4 in)
1921
66.3 mm (2.6 in)
1922
71.1 mm (2.8 in)
1923
83.8 mm (3.3 in)
1924
62.7 mm (2.5 in)
1925
81.3 mm (3.2 in)
1926
68.6 mm (2.7 in)
1927
53.8 mm (2.1 in)
1928
69.9 mm (2.8 in)
1929
92.7 mm (3.6 in)
1930
30.0 mm (1.2 in)
1931
57.2 mm (2.3 in)
1932
88.9 mm (3.5 in)
1933
74.9 mm (2.9 in)
1934
44.5 mm (1.8 in)
1935
50.8 mm (2.0 in)
1936
66.8 mm (2.6 in)
1937
76.2 mm (3.0 in)
1938
72.4 mm (2.9 in)
1939
57.2 mm (2.3 in)
1940
96.5 mm (3.8 in)
1941
47.0 mm (1.9 in)
1942
55.1 mm (2.2 in)
1943
71.1 mm (2.8 in)
1944
57.2 mm (2.3 in)
1945
115.6 mm (4.6 in)
1946
48.8 mm (1.9 in)
1947
90.2 mm (3.6 in)
1948
72.4 mm (2.9 in)
1949
51.8 mm (2.0 in)
1950
55.9 mm (2.2 in)
1951
48.5 mm (1.9 in)
1952
47.2 mm (1.9 in)
1953
55.9 mm (2.2 in)
1954
61.0 mm (2.4 in)
1955
71.6 mm (2.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mt Healthy Exp Farm, 1914 to 1955. The record is 165.2 mm (6.5 in) in 1945, marked on the chart; the median year is 93.8 mm (3.7 in).
Wettest five days (Rx5day) at Mt Healthy Exp Farm by year
Year
Wettest five days (Rx5day)
1914
150.9 mm (5.9 in)
1915
72.1 mm (2.8 in)
1916
63.6 mm (2.5 in)
1917
70.7 mm (2.8 in)
1918
108.5 mm (4.3 in)
1919
129.5 mm (5.1 in)
1920
90.2 mm (3.6 in)
1921
106.7 mm (4.2 in)
1922
89.4 mm (3.5 in)
1923
100.1 mm (3.9 in)
1924
89.3 mm (3.5 in)
1925
82.6 mm (3.3 in)
1926
80.5 mm (3.2 in)
1927
93.9 mm (3.7 in)
1928
103.4 mm (4.1 in)
1929
122.0 mm (4.8 in)
1930
38.9 mm (1.5 in)
1931
89.6 mm (3.5 in)
1932
100.3 mm (3.9 in)
1933
143.5 mm (5.6 in)
1934
56.1 mm (2.2 in)
1935
68.8 mm (2.7 in)
1936
107.7 mm (4.2 in)
1937
131.1 mm (5.2 in)
1938
118.1 mm (4.6 in)
1939
125.1 mm (4.9 in)
1940
161.3 mm (6.4 in)
1941
66.1 mm (2.6 in)
1942
75.8 mm (3.0 in)
1943
109.2 mm (4.3 in)
1944
71.2 mm (2.8 in)
1945
165.2 mm (6.5 in)
1946
73.6 mm (2.9 in)
1947
133.4 mm (5.3 in)
1948
107.4 mm (4.2 in)
1949
93.7 mm (3.7 in)
1950
101.6 mm (4.0 in)
1951
58.7 mm (2.3 in)
1952
57.9 mm (2.3 in)
1953
75.4 mm (3.0 in)
1954
67.6 mm (2.7 in)
1955
111.8 mm (4.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mt Healthy Exp Farm, 1914 to 1955. The record is 36 days in 1944, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Mt Healthy Exp Farm by year
Year
Longest dry spell (CDD)
1914
23 days
1915
26 days
1916
17 days
1917
31 days
1918
16 days
1919
15 days
1920
27 days
1921
13 days
1922
21 days
1923
17 days
1924
31 days
1925
16 days
1926
12 days
1927
18 days
1928
22 days
1929
18 days
1930
24 days
1931
17 days
1932
15 days
1933
19 days
1934
24 days
1935
17 days
1936
26 days
1937
19 days
1938
23 days
1939
25 days
1940
26 days
1941
20 days
1942
15 days
1943
19 days
1944
36 days
1945
16 days
1946
22 days
1947
24 days
1948
16 days
1949
22 days
1950
14 days
1951
15 days
1952
23 days
1953
26 days
1954
14 days
1955
14 days
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
36 years with a frost
Across 36 years with a frost, the median last spring frost at Mt Healthy Exp Farm falls on 23 April and the median first autumn frost on 19 October, which leaves a median of 178 days between them.
Fitted over all years, the growing season changes by +0.6 days per decade at this station.
Frost dates and growing season at Mt Healthy Exp Farm
Measure
Median, all years
Earliest period
Recent period (1922 to 1954)
Recent against earliest
Fitted trend
Last spring frost
23 April
n/a
25 April
n/a
+0.5 days per decade
First autumn frost
19 October
n/a
19 October
n/a
+1.0 days per decade
Growing days
178 days
n/a
175 days
n/a
+0.6 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
36 years, 1915 to 1955
A day with at least 64.3 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 116.3 mm (4.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Mt Healthy Exp Farm: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
64.3 mm (2.5 in)
5 years
81.0 mm (3.2 in)
10 years
90.8 mm (3.6 in)
25 years
102.0 mm (4.0 in)
50 years
109.5 mm (4.3 in)
Longer than the 36 years of record
100 years
116.3 mm (4.6 in)
Longer than the 36 years of record
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 36 years of values from 1915 to 1955.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 115.6 mm (4.6 in) in 1945; 96.5 mm (3.8 in) in 1940; 92.7 mm (3.6 in) in 1929.
Download the Data
Data for Mt Healthy Exp Farm standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mt Healthy Exp Farm threshold days by year: CSV or JSON. Field meanings are on the data page.
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-15 (15 October 2026). Records are computed by this site and are not official.