Johnsonville Weather Records (USC00404673)

Record envelope, standing records and threshold days for Johnsonville (USC00404673), Tennessee, United States, with 67 years of record.

Key Facts for Johnsonville

Johnsonville (USC00404673) is a weather station in Tennessee, United States at 36.00 latitude and -88.03 longitude, 128 m (420 ft) above sea level.
The station reports from 1885 to 1951, 67 years of record.
1,464 records set at Johnsonville still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Johnsonville set a daily record precipitation of 53.3 mm (2.1 in) on 14 November 1951.

About the Station

Location: Tennessee, United States, 36.00 latitude, -88.03 longitude.
Elevation: 128 m (420 ft).
Period of record: 1885 to 1951, 67 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Johnsonville. 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 Johnsonville, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	26.1 C (79.0 F)	-28.9 C (-20.0 F)	n/a	n/a
Feb	27.2 C (81.0 F)	-30.6 C (-23.1 F)	n/a	n/a
Mar	33.3 C (91.9 F)	-15.6 C (3.9 F)	n/a	n/a
Apr	34.4 C (93.9 F)	-5.6 C (21.9 F)	n/a	n/a
May	37.8 C (100.0 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	40.6 C (105.1 F)	5.0 C (41.0 F)	n/a	n/a
Jul	43.3 C (109.9 F)	8.9 C (48.0 F)	n/a	n/a
Aug	42.8 C (109.0 F)	8.9 C (48.0 F)	n/a	n/a
Sep	42.2 C (108.0 F)	-1.1 C (30.0 F)	n/a	n/a
Oct	35.0 C (95.0 F)	-6.1 C (21.0 F)	n/a	n/a
Nov	31.1 C (88.0 F)	-14.4 C (6.1 F)	n/a	n/a
Dec	26.1 C (79.0 F)	-28.3 C (-18.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Johnsonville still stand. 1930 holds the most, with 52.

Standing records at Johnsonville by the year they were set
Year set	Standing records
1895	5
1896	45
1897	29
1898	30
1899	37
1900	27
1901	40
1902	34
1903	33
1904	18
1905	28
1906	27
1907	41
1908	22
1909	23
1910	33
1911	43
1912	28
1913	26
1914	46
1915	27
1916	27
1917	48
1918	38
1919	18
1920	20
1921	29
1922	23
1923	15
1924	45
1925	40
1926	25
1927	34
1928	25
1929	31
1930	52
1931	42
1932	42
1933	28
1934	24
1935	16
1936	29
1937	24
1938	19
1939	20
1940	33
1941	14
1942	31
1943	30

All-Time Record Progression

2 new records

2 all-time records were set at Johnsonville between 17 March 1919 and 28 July 1930. Each dot is a new record.

When Johnsonville set new all-time records
Date	Kind	Detail
1919-03-17	Record daily precipitation	Record daily precipitation 162.6 mm (6.4 in)
1930-07-28	Record high maximum temperature	Record high maximum temperature 43.3 C (109.9 F)

Wettest Day of Each Month

Mar: 162.6 mm (6.4 in)

The wettest day on record for each calendar month at Johnsonville. The most was 162.6 mm (6.4 in) on 17 March 1919.

Record daily precipitation for each month at Johnsonville
Month	Record daily precipitation (mm)	Date
Jan	140.7 mm (5.5 in)	13 January 1932
Feb	81.8 mm (3.2 in)	23 February 1925
Mar	162.6 mm (6.4 in)	17 March 1919
Apr	124.5 mm (4.9 in)	9 April 1942
May	101.3 mm (4.0 in)	20 May 1909
Jun	106.7 mm (4.2 in)	18 June 1934
Jul	118.4 mm (4.7 in)	13 July 1924
Aug	101.6 mm (4.0 in)	25 August 1950
Sep	79.2 mm (3.1 in)	7 September 1914
Oct	131.8 mm (5.2 in)	7 October 1900
Nov	125.0 mm (4.9 in)	17 November 1906
Dec	156.5 mm (6.2 in)	21 December 1926

Period of Record Coverage

1895 to 1943

49 years of record at Johnsonville, 1895 to 1943. 6 years have data for under 90 percent of days and are left out of rankings: 1895, 1897, 1901, 1905, 1924, 1943.

Days with data per year at Johnsonville
Year	Days with data	Share of year	Complete
1895	31	8%	No
1896	341	93%	Yes
1897	319	87%	No
1898	365	100%	Yes
1899	359	98%	Yes
1900	365	100%	Yes
1901	260	71%	No
1902	331	91%	Yes
1903	361	99%	Yes
1904	361	99%	Yes
1905	321	88%	No
1906	354	97%	Yes
1907	361	99%	Yes
1908	364	99%	Yes
1909	364	100%	Yes
1910	364	100%	Yes
1911	364	100%	Yes
1912	365	100%	Yes
1913	365	100%	Yes
1914	364	100%	Yes
1915	361	99%	Yes
1916	365	100%	Yes
1917	359	98%	Yes
1918	365	100%	Yes
1919	364	100%	Yes
1920	365	100%	Yes
1921	362	99%	Yes
1922	365	100%	Yes
1923	357	98%	Yes
1924	321	88%	No
1925	365	100%	Yes
1926	363	99%	Yes
1927	359	98%	Yes
1928	366	100%	Yes
1929	360	99%	Yes
1930	364	100%	Yes
1931	365	100%	Yes
1932	364	99%	Yes
1933	363	99%	Yes
1934	364	100%	Yes
1935	363	99%	Yes
1936	365	100%	Yes
1937	343	94%	Yes
1938	365	100%	Yes
1939	364	100%	Yes
1940	365	100%	Yes
1941	335	92%	Yes
1942	364	100%	Yes
1943	257	70%	No

Latest Records

Latest records at Johnsonville
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 November 1951	Johnsonville, US	daily rain	53.3 mm (2.1 in)	2.5 mm (0.10 in)	36 years	17 of 100 (Routine)
13 November 1951	Johnsonville, US	daily rain	23.4 mm (0.9 in)	1.6 mm (0.06 in)	61 years	20 of 100 (Routine)
1 November 1951	Johnsonville, US	daily rain	64.3 mm (2.5 in)	25.4 mm (1.0 in)	32 years	31 of 100 (Routine)
14 July 1951	Johnsonville, US	daily rain	64.0 mm (2.5 in)	31.5 mm (1.2 in)	21 years	34 of 100 (Routine)
10 July 1951	Johnsonville, US	daily rain	39.1 mm (1.5 in)	13.7 mm (0.5 in)	10 years	18 of 100 (Routine)
22 April 1951	Johnsonville, US	daily rain	49.3 mm (1.9 in)	23.9 mm (0.9 in)	20 years	28 of 100 (Routine)
3 January 1951	Johnsonville, US	daily rain	80.5 mm (3.2 in)	4.3 mm (0.17 in)	27 years	16 of 100 (Routine)
3 December 1950	Johnsonville, US	daily rain	41.9 mm (1.6 in)	14.0 mm (0.6 in)	16 years	19 of 100 (Routine)
24 November 1950	Johnsonville, US	daily snowfall	11.4 cm (4.5 in)	7.8 cm (3.1 in)	12 years	24 of 100 (Routine)
22 October 1950	Johnsonville, US	daily rain	37.6 mm (1.5 in)	10.2 mm (0.4 in)	49 years	26 of 100 (Routine)
8 September 1950	Johnsonville, US	daily rain	31.5 mm (1.2 in)	15.0 mm (0.6 in)	61 years	34 of 100 (Routine)
25 August 1950	Johnsonville, US	monthly rain	101.6 mm (4.0 in)	24.9 mm (1.0 in)	35 years	43 of 100 (Notable)
16 August 1950	Johnsonville, US	daily rain	25.9 mm (1.0 in)	3.3 mm (0.13 in)	48 years	22 of 100 (Routine)
24 July 1950	Johnsonville, US	daily rain	50.8 mm (2.0 in)	19.3 mm (0.8 in)	40 years	31 of 100 (Routine)
4 June 1950	Johnsonville, US	daily rain	52.8 mm (2.1 in)	4.5 mm (0.18 in)	21 years	15 of 100 (Routine)
1 February 1950	Johnsonville, US	daily rain	43.9 mm (1.7 in)	5.5 mm (0.22 in)	35 years	20 of 100 (Routine)
12 December 1949	Johnsonville, US	daily rain	90.2 mm (3.6 in)	27.7 mm (1.1 in)	38 years	35 of 100 (Notable)
11 December 1949	Johnsonville, US	daily rain	47.8 mm (1.9 in)	13.0 mm (0.5 in)	49 years	28 of 100 (Routine)
11 June 1949	Johnsonville, US	daily rain	39.9 mm (1.6 in)	4.8 mm (0.19 in)	26 years	16 of 100 (Routine)
10 March 1949	Johnsonville, US	daily snowfall	1.3 cm (0.5 in)	1.3 cm (0.5 in)	53 years	20 of 100 (Routine)

Climate Trend

39 complete years, 1898 to 1942

One stripe for each of 39 complete years at Johnsonville, 1898 to 1942. Blue stripes are years cooler than the station's own mean of 15.5 C (59.9 F); red stripes are warmer. The coolest year was 1940, at 14.1 C (57.3 F), and the warmest was 1921, at 17.3 C (63.2 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Johnsonville as warming stripes, 1898 to 1942
Year	Annual mean temperature	Difference from the station mean
1898	15.5 C	+0.03 C
1899	14.8 C	-0.75 C
1900	15.5 C	-0.02 C
1903	14.5 C	-0.97 C
1904	14.7 C	-0.77 C
1906	15.2 C	-0.29 C
1907	15.5 C	0.00 C
1908	15.7 C	+0.20 C
1909	15.4 C	-0.08 C
1910	14.4 C	-1.09 C
1911	16.4 C	+0.85 C
1912	14.4 C	-1.10 C
1913	15.9 C	+0.44 C
1914	15.7 C	+0.20 C
1915	15.6 C	+0.14 C
1916	15.6 C	+0.10 C
1917	14.2 C	-1.29 C
1918	15.6 C	+0.07 C
1919	15.9 C	+0.42 C
1920	15.1 C	-0.44 C
1921	17.3 C	+1.81 C
1922	16.4 C	+0.87 C
1923	15.3 C	-0.17 C
1925	16.0 C	+0.45 C
1926	15.2 C	-0.31 C
1927	16.3 C	+0.81 C
1928	14.9 C	-0.56 C
1929	15.2 C	-0.33 C
1930	15.6 C	+0.05 C
1931	16.2 C	+0.65 C
1932	15.8 C	+0.28 C
1933	16.4 C	+0.86 C
1934	15.8 C	+0.32 C
1935	15.5 C	+0.01 C
1936	15.5 C	+0.04 C
1938	16.3 C	+0.81 C
1939	15.8 C	+0.32 C
1940	14.1 C	-1.42 C
1942	15.4 C	-0.11 C

The fitted trend in annual mean temperature here over 1898 to 1942 is 0.13 C (-0.05 to 0.30) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.5) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Johnsonville
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.13 C (-0.05 to 0.30) per decade	0.2 F (-0.1 to 0.5) per decade	1898 to 1942	39	Not clearly different from zero
Mean daily maximum	0.1 C (-0.1 to 0.3) per decade	0.1 F (-0.2 to 0.5) per decade	1898 to 1942	39	Not clearly different from zero
Mean daily minimum	0.17 C (-0.02 to 0.36) per decade	0.31 F (-0.03 to 0.65) per decade	1898 to 1942	39	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

1885 to 1951

Yearly extremes at Johnsonville: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.3 C (109.9 F)	1930	37.8 C (100.0 F)	49
Coldest night (TNn)	-30.6 C (-23.1 F)	1899	-16.1 C (3.0 F)	49
Wettest day (Rx1day)	162.6 mm (6.4 in)	1919	78.3 mm (3.1 in)	62
Wettest five days (Rx5day)	291.6 mm (11.5 in)	1937	127.4 mm (5.0 in)	62
Longest dry spell (CDD)	39 days	1897	20 days	62

Hottest day (TXx)

The hottest day of the year at Johnsonville, 1885 to 1951. The record is 43.3 C (109.9 F) in 1930, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Johnsonville by year
Year	Hottest day (TXx)
1885	n/a
1886	n/a
1887	n/a
1888	n/a
1889	n/a
1890	n/a
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	21.7 C (71.1 F)
1896	38.9 C (102.0 F)
1897	37.8 C (100.0 F)
1898	36.7 C (98.1 F)
1899	38.9 C (102.0 F)
1900	37.8 C (100.0 F)
1901	41.1 C (106.0 F)
1902	39.4 C (102.9 F)
1903	37.2 C (99.0 F)
1904	36.1 C (97.0 F)
1905	36.7 C (98.1 F)
1906	38.3 C (100.9 F)
1907	38.9 C (102.0 F)
1908	37.8 C (100.0 F)
1909	38.9 C (102.0 F)
1910	37.2 C (99.0 F)
1911	40.0 C (104.0 F)
1912	37.8 C (100.0 F)
1913	39.4 C (102.9 F)
1914	40.6 C (105.1 F)
1915	38.3 C (100.9 F)
1916	37.2 C (99.0 F)
1917	36.7 C (98.1 F)
1918	41.1 C (106.0 F)
1919	37.8 C (100.0 F)
1920	36.1 C (97.0 F)
1921	37.8 C (100.0 F)
1922	38.3 C (100.9 F)
1923	34.4 C (93.9 F)
1924	36.7 C (98.1 F)
1925	42.2 C (108.0 F)
1926	39.4 C (102.9 F)
1927	36.7 C (98.1 F)
1928	35.0 C (95.0 F)
1929	36.7 C (98.1 F)
1930	43.3 C (109.9 F)
1931	40.0 C (104.0 F)
1932	37.2 C (99.0 F)
1933	37.2 C (99.0 F)
1934	38.9 C (102.0 F)
1935	40.0 C (104.0 F)
1936	40.0 C (104.0 F)
1937	37.8 C (100.0 F)
1938	36.1 C (97.0 F)
1939	37.2 C (99.0 F)
1940	38.3 C (100.9 F)
1941	37.2 C (99.0 F)
1942	37.8 C (100.0 F)
1943	40.0 C (104.0 F)
1949	n/a
1950	n/a
1951	n/a

Coldest night (TNn)

The coldest night of the year at Johnsonville, 1885 to 1951. The record is -30.6 C (-23.1 F) in 1899, marked on the chart; the median year is -16.1 C (3.0 F).

Coldest night (TNn) at Johnsonville by year
Year	Coldest night (TNn)
1885	n/a
1886	n/a
1887	n/a
1888	n/a
1889	n/a
1890	n/a
1891	n/a
1892	n/a
1893	n/a
1894	n/a
1895	-9.4 C (15.1 F)
1896	-12.8 C (9.0 F)
1897	-22.2 C (-8.0 F)
1898	-19.4 C (-2.9 F)
1899	-30.6 C (-23.1 F)
1900	-20.0 C (-4.0 F)
1901	-15.0 C (5.0 F)
1902	-16.7 C (1.9 F)
1903	-18.3 C (-0.9 F)
1904	-14.4 C (6.1 F)
1905	-20.0 C (-4.0 F)
1906	-13.3 C (8.1 F)
1907	-18.3 C (-0.9 F)
1908	-11.7 C (10.9 F)
1909	-15.6 C (3.9 F)
1910	-23.3 C (-9.9 F)
1911	-14.4 C (6.1 F)
1912	-21.7 C (-7.1 F)
1913	-11.7 C (10.9 F)
1914	-17.8 C (0.0 F)
1915	-11.1 C (12.0 F)
1916	-17.2 C (1.0 F)
1917	-28.3 C (-18.9 F)
1918	-25.0 C (-13.0 F)
1919	-15.0 C (5.0 F)
1920	-14.4 C (6.1 F)
1921	-6.7 C (19.9 F)
1922	-11.7 C (10.9 F)
1923	-11.1 C (12.0 F)
1924	-18.3 C (-0.9 F)
1925	-15.6 C (3.9 F)
1926	-12.2 C (10.0 F)
1927	-16.1 C (3.0 F)
1928	-17.8 C (0.0 F)
1929	-17.8 C (0.0 F)
1930	-21.1 C (-6.0 F)
1931	-16.1 C (3.0 F)
1932	-14.4 C (6.1 F)
1933	-19.4 C (-2.9 F)
1934	-16.1 C (3.0 F)
1935	-15.6 C (3.9 F)
1936	-18.9 C (-2.0 F)
1937	-15.6 C (3.9 F)
1938	-12.2 C (10.0 F)
1939	-10.6 C (12.9 F)
1940	-25.0 C (-13.0 F)
1941	-10.0 C (14.0 F)
1942	-28.9 C (-20.0 F)
1943	-12.8 C (9.0 F)
1949	n/a
1950	n/a
1951	n/a

Wettest day (Rx1day)

The wettest day of the year at Johnsonville, 1885 to 1951. The record is 162.6 mm (6.4 in) in 1919, marked on the chart; the median year is 78.3 mm (3.1 in).

Wettest day (Rx1day) at Johnsonville by year
Year	Wettest day (Rx1day)
1885	27.4 mm (1.1 in)
1886	77.0 mm (3.0 in)
1887	49.8 mm (2.0 in)
1888	31.2 mm (1.2 in)
1889	63.5 mm (2.5 in)
1890	62.2 mm (2.4 in)
1891	63.5 mm (2.5 in)
1892	97.0 mm (3.8 in)
1893	75.2 mm (3.0 in)
1894	44.2 mm (1.7 in)
1895	41.1 mm (1.6 in)
1896	118.4 mm (4.7 in)
1897	41.9 mm (1.6 in)
1898	85.9 mm (3.4 in)
1899	64.3 mm (2.5 in)
1900	131.8 mm (5.2 in)
1901	62.7 mm (2.5 in)
1902	87.9 mm (3.5 in)
1903	60.5 mm (2.4 in)
1904	74.4 mm (2.9 in)
1905	93.5 mm (3.7 in)
1906	125.0 mm (4.9 in)
1907	88.4 mm (3.5 in)
1908	53.8 mm (2.1 in)
1909	101.3 mm (4.0 in)
1910	60.5 mm (2.4 in)
1911	75.9 mm (3.0 in)
1912	48.3 mm (1.9 in)
1913	101.6 mm (4.0 in)
1914	101.1 mm (4.0 in)
1915	76.7 mm (3.0 in)
1916	79.5 mm (3.1 in)
1917	46.5 mm (1.8 in)
1918	58.7 mm (2.3 in)
1919	162.6 mm (6.4 in)
1920	76.7 mm (3.0 in)
1921	82.8 mm (3.3 in)
1922	80.3 mm (3.2 in)
1923	83.8 mm (3.3 in)
1924	132.1 mm (5.2 in)
1925	81.8 mm (3.2 in)
1926	156.5 mm (6.2 in)
1927	89.9 mm (3.5 in)
1928	83.3 mm (3.3 in)
1929	61.0 mm (2.4 in)
1930	63.5 mm (2.5 in)
1931	96.5 mm (3.8 in)
1932	140.7 mm (5.5 in)
1933	57.9 mm (2.3 in)
1934	106.7 mm (4.2 in)
1935	119.6 mm (4.7 in)
1936	99.1 mm (3.9 in)
1937	97.5 mm (3.8 in)
1938	65.3 mm (2.6 in)
1939	64.0 mm (2.5 in)
1940	45.5 mm (1.8 in)
1941	69.9 mm (2.8 in)
1942	124.5 mm (4.9 in)
1943	58.4 mm (2.3 in)
1949	90.2 mm (3.6 in)
1950	101.6 mm (4.0 in)
1951	80.5 mm (3.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Johnsonville, 1885 to 1951. The record is 291.6 mm (11.5 in) in 1937, marked on the chart; the median year is 127.4 mm (5.0 in).

Wettest five days (Rx5day) at Johnsonville by year
Year	Wettest five days (Rx5day)
1885	61.0 mm (2.4 in)
1886	113.6 mm (4.5 in)
1887	93.8 mm (3.7 in)
1888	104.9 mm (4.1 in)
1889	126.7 mm (5.0 in)
1890	130.0 mm (5.1 in)
1891	99.1 mm (3.9 in)
1892	150.8 mm (5.9 in)
1893	145.9 mm (5.7 in)
1894	60.9 mm (2.4 in)
1895	65.7 mm (2.6 in)
1896	178.6 mm (7.0 in)
1897	66.3 mm (2.6 in)
1898	136.0 mm (5.4 in)
1899	137.0 mm (5.4 in)
1900	151.4 mm (6.0 in)
1901	126.2 mm (5.0 in)
1902	158.0 mm (6.2 in)
1903	141.3 mm (5.6 in)
1904	139.7 mm (5.5 in)
1905	119.4 mm (4.7 in)
1906	265.7 mm (10.5 in)
1907	128.1 mm (5.0 in)
1908	112.2 mm (4.4 in)
1909	109.2 mm (4.3 in)
1910	104.0 mm (4.1 in)
1911	155.4 mm (6.1 in)
1912	103.0 mm (4.1 in)
1913	150.9 mm (5.9 in)
1914	167.0 mm (6.6 in)
1915	130.6 mm (5.1 in)
1916	128.5 mm (5.1 in)
1917	84.3 mm (3.3 in)
1918	118.9 mm (4.7 in)
1919	180.6 mm (7.1 in)
1920	124.0 mm (4.9 in)
1921	144.2 mm (5.7 in)
1922	144.3 mm (5.7 in)
1923	102.1 mm (4.0 in)
1924	181.3 mm (7.1 in)
1925	109.2 mm (4.3 in)
1926	242.3 mm (9.5 in)
1927	170.2 mm (6.7 in)
1928	194.1 mm (7.6 in)
1929	90.4 mm (3.6 in)
1930	114.8 mm (4.5 in)
1931	122.4 mm (4.8 in)
1932	176.5 mm (6.9 in)
1933	136.1 mm (5.4 in)
1934	107.5 mm (4.2 in)
1935	232.1 mm (9.1 in)
1936	119.2 mm (4.7 in)
1937	291.6 mm (11.5 in)
1938	139.4 mm (5.5 in)
1939	122.5 mm (4.8 in)
1940	61.5 mm (2.4 in)
1941	80.1 mm (3.2 in)
1942	159.5 mm (6.3 in)
1943	95.7 mm (3.8 in)
1949	195.9 mm (7.7 in)
1950	124.9 mm (4.9 in)
1951	109.5 mm (4.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Johnsonville, 1885 to 1951. The record is 39 days in 1897, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Johnsonville by year
Year	Longest dry spell (CDD)
1885	9 days
1886	12 days
1887	14 days
1888	10 days
1889	33 days
1890	29 days
1891	32 days
1892	14 days
1893	36 days
1894	24 days
1895	19 days
1896	15 days
1897	39 days
1898	19 days
1899	13 days
1900	23 days
1901	21 days
1902	17 days
1903	24 days
1904	22 days
1905	18 days
1906	20 days
1907	18 days
1908	35 days
1909	30 days
1910	22 days
1911	18 days
1912	19 days
1913	19 days
1914	24 days
1915	20 days
1916	17 days
1917	17 days
1918	16 days
1919	20 days
1920	17 days
1921	23 days
1922	15 days
1923	16 days
1924	33 days
1925	23 days
1926	16 days
1927	21 days
1928	32 days
1929	22 days
1930	23 days
1931	20 days
1932	14 days
1933	17 days
1934	16 days
1935	18 days
1936	23 days
1937	11 days
1938	33 days
1939	36 days
1940	24 days
1941	20 days
1942	20 days
1943	25 days
1949	13 days
1950	16 days
1951	28 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

39 years with a frost

Across 39 years with a frost, the median last spring frost at Johnsonville falls on 12 April and the median first autumn frost on 23 October, which leaves a median of 192 days between them.

Fitted over all years, the growing season changes by -0.1 days per decade at this station.

Frost dates and growing season at Johnsonville
Measure	Median, all years	Earliest period	Recent period (1910 to 1942)	Recent against earliest	Fitted trend
Last spring frost	12 April	n/a	12 April	n/a	+0.9 days per decade
First autumn frost	23 October	n/a	24 October	n/a	+0.8 days per decade
Growing days	192 days	n/a	196 days	n/a	-0.1 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

54 years, 1890 to 1950

A day with at least 79.8 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 175.7 mm (6.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Johnsonville: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	79.8 mm (3.1 in)
5 years	106.2 mm (4.2 in)
10 years	123.4 mm (4.9 in)
25 years	144.8 mm (5.7 in)
50 years	160.4 mm (6.3 in)
100 years	175.7 mm (6.9 in)	Longer than the 54 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, 54 years of values from 1890 to 1950.

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: 162.6 mm (6.4 in) in 1919; 156.5 mm (6.2 in) in 1926; 140.7 mm (5.5 in) in 1932.

Download the Data

Data for Johnsonville standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Johnsonville 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).