Blacksburg Weather Records (USC00440765)

Record envelope, standing records and threshold days for Blacksburg (USC00440765), Virginia, United States, with 60 years of record.

Key Facts for Blacksburg

Blacksburg (USC00440765) is a weather station in Virginia, United States at 37.25 latitude and -80.42 longitude, 662 m (2,172 ft) above sea level.
The station reports from 1893 to 1952, 60 years of record.
1,464 records set at Blacksburg still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Blacksburg set a daily record low minimum temperature of -8.3 C (17.1 F) on 21 October 1952.

About the Station

Location: Virginia, United States, 37.25 latitude, -80.42 longitude.
Elevation: 662 m (2,172 ft).
Period of record: 1893 to 1952, 60 years.
Eligible elements: tmax, tmin, prcp, snow.

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 Blacksburg. 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 Blacksburg, 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)	-26.7 C (-16.1 F)	n/a	n/a
Feb	26.1 C (79.0 F)	-24.4 C (-11.9 F)	n/a	n/a
Mar	29.4 C (84.9 F)	-18.9 C (-2.0 F)	n/a	n/a
Apr	31.7 C (89.1 F)	-12.2 C (10.0 F)	n/a	n/a
May	33.9 C (93.0 F)	-3.9 C (25.0 F)	n/a	n/a
Jun	37.2 C (99.0 F)	0.6 C (33.1 F)	n/a	n/a
Jul	37.8 C (100.0 F)	1.1 C (34.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	1.7 C (35.1 F)	n/a	n/a
Sep	36.1 C (97.0 F)	-5.0 C (23.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	-10.0 C (14.0 F)	n/a	n/a
Nov	27.2 C (81.0 F)	-18.3 C (-0.9 F)	n/a	n/a
Dec	22.8 C (73.0 F)	-32.8 C (-27.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Blacksburg still stand. 1895 holds the most, with 52.

Standing records at Blacksburg by the year they were set
Year set	Standing records
1893	41
1894	18
1895	52
1896	26
1897	24
1898	23
1899	42
1900	32
1901	16
1902	35
1903	25
1904	26
1905	28
1906	25
1907	26
1908	21
1909	31
1910	21
1911	20
1912	15
1913	28
1914	38
1915	23
1916	19
1917	46
1918	33
1919	17
1920	23
1921	25
1922	15
1923	15
1924	17
1925	33
1926	22
1927	18
1928	19
1929	27
1930	42
1931	22
1932	27
1933	17
1934	32
1935	16
1936	28
1937	22
1938	8
1939	18
1940	20
1941	40
1942	22
1943	21
1944	14
1945	17
1946	22
1947	15
1948	23
1949	19
1950	21
1951	19
1952	14

All-Time Record Progression

5 new records

5 all-time records were set at Blacksburg between 22 July 1926 and 5 July 1949. Each dot is a new record.

When Blacksburg set new all-time records
Date	Kind	Detail
1926-07-22	Record high maximum temperature	Record high maximum temperature 37.8 C (100.0 F)
1934-07-21	Record high minimum temperature	Record high minimum temperature 23.3 C (73.9 F)
1934-07-23	Record high minimum temperature	Record high minimum temperature 25.0 C (77.0 F)
1940-08-14	Record daily precipitation	Record daily precipitation 113.8 mm (4.5 in)
1949-07-05	Record high minimum temperature	Record high minimum temperature 25.6 C (78.1 F)

Wettest Day of Each Month

Aug: 113.8 mm (4.5 in)

The wettest day on record for each calendar month at Blacksburg. The most was 113.8 mm (4.5 in) on 14 August 1940.

Record daily precipitation for each month at Blacksburg
Month	Record daily precipitation (mm)	Date
Jan	48.3 mm (1.9 in)	10 January 1921
Feb	64.0 mm (2.5 in)	8 February 1905
Mar	52.1 mm (2.1 in)	17 March 1936
Apr	51.1 mm (2.0 in)	13 April 1949
May	63.8 mm (2.5 in)	6 May 1898
Jun	97.5 mm (3.8 in)	18 June 1918
Jul	86.4 mm (3.4 in)	23 July 1900
Aug	113.8 mm (4.5 in)	14 August 1940
Sep	90.7 mm (3.6 in)	16 September 1903
Oct	80.3 mm (3.2 in)	22 October 1929
Nov	75.7 mm (3.0 in)	25 November 1900
Dec	57.7 mm (2.3 in)	29 December 1901

Period of Record Coverage

1893 to 1952

60 years of record at Blacksburg, 1893 to 1952. 3 years have data for under 90 percent of days and are left out of rankings: 1910, 1923, 1952.

Days with data per year at Blacksburg
Year	Days with data	Share of year	Complete
1893	358	98%	Yes
1894	361	99%	Yes
1895	364	100%	Yes
1896	334	91%	Yes
1897	362	99%	Yes
1898	362	99%	Yes
1899	363	99%	Yes
1900	359	98%	Yes
1901	361	99%	Yes
1902	355	97%	Yes
1903	363	99%	Yes
1904	365	100%	Yes
1905	359	98%	Yes
1906	364	100%	Yes
1907	359	98%	Yes
1908	363	99%	Yes
1909	359	98%	Yes
1910	295	81%	No
1911	361	99%	Yes
1912	363	99%	Yes
1913	359	98%	Yes
1914	330	90%	Yes
1915	363	99%	Yes
1916	365	100%	Yes
1917	360	99%	Yes
1918	365	100%	Yes
1919	362	99%	Yes
1920	347	95%	Yes
1921	359	98%	Yes
1922	356	98%	Yes
1923	285	78%	No
1924	347	95%	Yes
1925	358	98%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	360	98%	Yes
1929	354	97%	Yes
1930	360	99%	Yes
1931	362	99%	Yes
1932	363	99%	Yes
1933	364	100%	Yes
1934	364	100%	Yes
1935	365	100%	Yes
1936	363	99%	Yes
1937	364	100%	Yes
1938	360	99%	Yes
1939	365	100%	Yes
1940	365	100%	Yes
1941	360	99%	Yes
1942	363	99%	Yes
1943	362	99%	Yes
1944	359	98%	Yes
1945	363	99%	Yes
1946	353	97%	Yes
1947	350	96%	Yes
1948	353	96%	Yes
1949	359	98%	Yes
1950	357	98%	Yes
1951	365	100%	Yes
1952	302	83%	No

Latest Records

Latest records at Blacksburg
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 1952	Blacksburg, US	daily low min	-8.3 C (17.1 F)	2.7 C (4.9 F)	35 years	21 of 100 (Routine)
8 October 1952	Blacksburg, US	daily low max (Tie)	12.2 C (54.0 F)	tie	42 years	4 of 100 (Routine)
4 October 1952	Blacksburg, US	daily low min	-2.2 C (28.0 F)	0.5 C (0.9 F)	54 years	22 of 100 (Routine)
31 August 1952	Blacksburg, US	daily high min (Tie)	19.4 C (66.9 F)	tie	15 years	2 of 100 (Routine)
22 August 1952	Blacksburg, US	daily high min	19.4 C (66.9 F)	0.5 C (0.9 F)	15 years	11 of 100 (Routine)
13 August 1952	Blacksburg, US	daily high min (Tie)	19.4 C (66.9 F)	tie	12 years	2 of 100 (Routine)
9 August 1952	Blacksburg, US	daily rain	49.0 mm (1.9 in)	6.3 mm (0.25 in)	15 years	15 of 100 (Routine)
30 July 1952	Blacksburg, US	daily high max (Tie)	33.9 C (93.0 F)	tie	21 years	3 of 100 (Routine)
29 July 1952	Blacksburg, US	daily high max	37.2 C (99.0 F)	0.5 C (0.9 F)	22 years	13 of 100 (Routine)
28 July 1952	Blacksburg, US	all-time high max (Tie)	37.8 C (100.0 F)	tie	26 years	8 of 100 (Routine)
27 July 1952	Blacksburg, US	daily high max	35.0 C (95.0 F)	0.6 C (1.1 F)	12 years	10 of 100 (Routine)
23 July 1952	Blacksburg, US	daily high max	35.6 C (96.1 F)	1.2 C (2.2 F)	26 years	16 of 100 (Routine)
27 June 1952	Blacksburg, US	daily high max (Tie)	35.6 C (96.1 F)	tie	38 years	4 of 100 (Routine)
22 June 1952	Blacksburg, US	daily high min	20.0 C (68.0 F)	0.6 C (1.1 F)	38 years	18 of 100 (Routine)
16 June 1952	Blacksburg, US	daily high max (Tie)	32.8 C (91.0 F)	tie	18 years	2 of 100 (Routine)
15 June 1952	Blacksburg, US	daily high max	32.8 C (91.0 F)	0.6 C (1.1 F)	27 years	15 of 100 (Routine)
9 June 1952	Blacksburg, US	daily high max (Tie)	33.3 C (91.9 F)	tie	38 years	4 of 100 (Routine)
5 May 1952	Blacksburg, US	daily high min (Tie)	15.0 C (59.0 F)	tie	47 years	5 of 100 (Routine)
24 April 1952	Blacksburg, US	daily rain	33.0 mm (1.3 in)	11.4 mm (0.4 in)	11 years	22 of 100 (Routine)
22 April 1952	Blacksburg, US	daily high max (Tie)	28.9 C (84.0 F)	tie	50 years	5 of 100 (Routine)

Climate Trend

53 complete years, 1893 to 1951

One stripe for each of 53 complete years at Blacksburg, 1893 to 1951. Blue stripes are years cooler than the station's own mean of 11.5 C (52.8 F); red stripes are warmer. The coolest year was 1917, at 9.8 C (49.6 F), and the warmest was 1949, at 12.8 C (55.1 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Blacksburg as warming stripes, 1893 to 1951
Year	Annual mean temperature	Difference from the station mean
1893	11.3 C	-0.23 C
1894	11.0 C	-0.51 C
1895	9.9 C	-1.62 C
1897	11.1 C	-0.41 C
1898	11.2 C	-0.32 C
1899	11.3 C	-0.21 C
1900	11.7 C	+0.12 C
1901	9.9 C	-1.62 C
1902	11.2 C	-0.32 C
1903	10.6 C	-0.98 C
1904	10.1 C	-1.39 C
1905	10.6 C	-0.92 C
1906	11.2 C	-0.36 C
1907	10.6 C	-0.91 C
1908	10.7 C	-0.80 C
1909	10.7 C	-0.88 C
1911	11.9 C	+0.35 C
1912	10.8 C	-0.71 C
1913	12.0 C	+0.43 C
1915	11.1 C	-0.39 C
1916	11.2 C	-0.29 C
1917	9.8 C	-1.74 C
1918	11.1 C	-0.46 C
1919	11.8 C	+0.26 C
1921	12.0 C	+0.51 C
1922	12.1 C	+0.56 C
1925	11.5 C	-0.04 C
1926	11.2 C	-0.30 C
1927	12.0 C	+0.47 C
1928	11.2 C	-0.34 C
1929	11.4 C	-0.13 C
1930	11.9 C	+0.37 C
1931	12.6 C	+1.07 C
1932	12.5 C	+0.97 C
1933	12.8 C	+1.25 C
1934	12.3 C	+0.76 C
1935	12.1 C	+0.56 C
1936	12.2 C	+0.71 C
1937	11.8 C	+0.29 C
1938	12.5 C	+0.97 C
1939	12.7 C	+1.13 C
1940	11.1 C	-0.48 C
1941	12.8 C	+1.26 C
1942	12.0 C	+0.43 C
1943	11.9 C	+0.34 C
1944	11.8 C	+0.22 C
1945	11.9 C	+0.37 C
1946	12.4 C	+0.87 C
1947	11.1 C	-0.48 C
1948	12.2 C	+0.70 C
1949	12.8 C	+1.31 C
1950	11.6 C	+0.10 C
1951	11.9 C	+0.40 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1893 to 1951. In Fahrenheit: 0.5 F (0.3 to 0.7) per decade. The slope is a straight line fitted to 53 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Blacksburg
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.2 to 0.4) per decade	0.5 F (0.3 to 0.7) per decade	1893 to 1951	53	Rise
Mean daily maximum	0.2 C (0.1 to 0.3) per decade	0.4 F (0.2 to 0.6) per decade	1893 to 1951	53	Rise
Mean daily minimum	0.4 C (0.2 to 0.5) per decade	0.6 F (0.4 to 0.8) per decade	1893 to 1951	53	Rise

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

1893 to 1952

Yearly extremes at Blacksburg: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1926	33.3 C (91.9 F)	60
Coldest night (TNn)	-32.8 C (-27.0 F)	1917	-17.8 C (0.0 F)	60
Wettest day (Rx1day)	113.8 mm (4.5 in)	1940	55.6 mm (2.2 in)	60
Wettest five days (Rx5day)	172.3 mm (6.8 in)	1940	92.6 mm (3.6 in)	60
Longest dry spell (CDD)	33 days	1920	17 days	60

Hottest day (TXx)

The hottest day of the year at Blacksburg, 1893 to 1952. The record is 37.8 C (100.0 F) in 1926, marked on the chart; the median year is 33.3 C (91.9 F).

Hottest day (TXx) at Blacksburg by year
Year	Hottest day (TXx)
1893	33.3 C (91.9 F)
1894	35.6 C (96.1 F)
1895	33.3 C (91.9 F)
1896	33.3 C (91.9 F)
1897	34.4 C (93.9 F)
1898	32.8 C (91.0 F)
1899	34.4 C (93.9 F)
1900	35.6 C (96.1 F)
1901	33.3 C (91.9 F)
1902	35.0 C (95.0 F)
1903	32.8 C (91.0 F)
1904	32.8 C (91.0 F)
1905	32.2 C (90.0 F)
1906	33.3 C (91.9 F)
1907	32.2 C (90.0 F)
1908	33.3 C (91.9 F)
1909	32.8 C (91.0 F)
1910	33.3 C (91.9 F)
1911	34.4 C (93.9 F)
1912	32.2 C (90.0 F)
1913	34.4 C (93.9 F)
1914	37.2 C (99.0 F)
1915	33.3 C (91.9 F)
1916	31.7 C (89.1 F)
1917	34.4 C (93.9 F)
1918	35.6 C (96.1 F)
1919	32.2 C (90.0 F)
1920	30.0 C (86.0 F)
1921	31.1 C (88.0 F)
1922	31.7 C (89.1 F)
1923	31.7 C (89.1 F)
1924	32.2 C (90.0 F)
1925	36.7 C (98.1 F)
1926	37.8 C (100.0 F)
1927	33.3 C (91.9 F)
1928	32.8 C (91.0 F)
1929	32.8 C (91.0 F)
1930	37.2 C (99.0 F)
1931	35.0 C (95.0 F)
1932	36.7 C (98.1 F)
1933	33.9 C (93.0 F)
1934	37.2 C (99.0 F)
1935	33.3 C (91.9 F)
1936	36.7 C (98.1 F)
1937	32.2 C (90.0 F)
1938	31.7 C (89.1 F)
1939	33.3 C (91.9 F)
1940	34.4 C (93.9 F)
1941	35.6 C (96.1 F)
1942	33.9 C (93.0 F)
1943	34.4 C (93.9 F)
1944	33.9 C (93.0 F)
1945	33.3 C (91.9 F)
1946	32.2 C (90.0 F)
1947	33.9 C (93.0 F)
1948	34.4 C (93.9 F)
1949	33.3 C (91.9 F)
1950	31.7 C (89.1 F)
1951	34.4 C (93.9 F)
1952	37.8 C (100.0 F)

Coldest night (TNn)

The coldest night of the year at Blacksburg, 1893 to 1952. The record is -32.8 C (-27.0 F) in 1917, marked on the chart; the median year is -17.8 C (0.0 F).

Coldest night (TNn) at Blacksburg by year
Year	Coldest night (TNn)
1893	-19.4 C (-2.9 F)
1894	-19.4 C (-2.9 F)
1895	-25.0 C (-13.0 F)
1896	-20.0 C (-4.0 F)
1897	-19.4 C (-2.9 F)
1898	-17.8 C (0.0 F)
1899	-23.9 C (-11.0 F)
1900	-18.9 C (-2.0 F)
1901	-17.8 C (0.0 F)
1902	-15.0 C (5.0 F)
1903	-18.3 C (-0.9 F)
1904	-21.1 C (-6.0 F)
1905	-20.0 C (-4.0 F)
1906	-15.0 C (5.0 F)
1907	-18.3 C (-0.9 F)
1908	-20.0 C (-4.0 F)
1909	-17.8 C (0.0 F)
1910	-15.0 C (5.0 F)
1911	-12.8 C (9.0 F)
1912	-21.7 C (-7.1 F)
1913	-14.4 C (6.1 F)
1914	-17.8 C (0.0 F)
1915	-14.4 C (6.1 F)
1916	-16.7 C (1.9 F)
1917	-32.8 C (-27.0 F)
1918	-26.7 C (-16.1 F)
1919	-17.8 C (0.0 F)
1920	-17.2 C (1.0 F)
1921	-15.6 C (3.9 F)
1922	-12.8 C (9.0 F)
1923	-15.0 C (5.0 F)
1924	-21.1 C (-6.0 F)
1925	-18.9 C (-2.0 F)
1926	-15.6 C (3.9 F)
1927	-18.3 C (-0.9 F)
1928	-19.4 C (-2.9 F)
1929	-17.8 C (0.0 F)
1930	-21.1 C (-6.0 F)
1931	-16.1 C (3.0 F)
1932	-20.0 C (-4.0 F)
1933	-17.8 C (0.0 F)
1934	-23.3 C (-9.9 F)
1935	-17.2 C (1.0 F)
1936	-22.8 C (-9.0 F)
1937	-13.3 C (8.1 F)
1938	-13.3 C (8.1 F)
1939	-12.2 C (10.0 F)
1940	-17.2 C (1.0 F)
1941	-16.1 C (3.0 F)
1942	-20.0 C (-4.0 F)
1943	-16.7 C (1.9 F)
1944	-16.7 C (1.9 F)
1945	-15.6 C (3.9 F)
1946	-15.6 C (3.9 F)
1947	-16.7 C (1.9 F)
1948	-17.8 C (0.0 F)
1949	-12.2 C (10.0 F)
1950	-16.1 C (3.0 F)
1951	-17.2 C (1.0 F)
1952	-12.8 C (9.0 F)

Wettest day (Rx1day)

The wettest day of the year at Blacksburg, 1893 to 1952. The record is 113.8 mm (4.5 in) in 1940, marked on the chart; the median year is 55.6 mm (2.2 in).

Wettest day (Rx1day) at Blacksburg by year
Year	Wettest day (Rx1day)
1893	46.7 mm (1.8 in)
1894	38.1 mm (1.5 in)
1895	50.0 mm (2.0 in)
1896	87.6 mm (3.4 in)
1897	45.7 mm (1.8 in)
1898	63.8 mm (2.5 in)
1899	51.6 mm (2.0 in)
1900	86.4 mm (3.4 in)
1901	70.4 mm (2.8 in)
1902	57.2 mm (2.3 in)
1903	90.7 mm (3.6 in)
1904	42.2 mm (1.7 in)
1905	64.0 mm (2.5 in)
1906	69.3 mm (2.7 in)
1907	52.6 mm (2.1 in)
1908	49.3 mm (1.9 in)
1909	50.8 mm (2.0 in)
1910	52.1 mm (2.1 in)
1911	55.6 mm (2.2 in)
1912	87.1 mm (3.4 in)
1913	63.2 mm (2.5 in)
1914	58.4 mm (2.3 in)
1915	39.6 mm (1.6 in)
1916	63.5 mm (2.5 in)
1917	46.7 mm (1.8 in)
1918	97.5 mm (3.8 in)
1919	47.5 mm (1.9 in)
1920	61.7 mm (2.4 in)
1921	75.4 mm (3.0 in)
1922	49.5 mm (1.9 in)
1923	74.9 mm (2.9 in)
1924	45.0 mm (1.8 in)
1925	31.8 mm (1.3 in)
1926	31.0 mm (1.2 in)
1927	75.2 mm (3.0 in)
1928	58.9 mm (2.3 in)
1929	80.3 mm (3.2 in)
1930	37.8 mm (1.5 in)
1931	78.7 mm (3.1 in)
1932	52.1 mm (2.1 in)
1933	45.0 mm (1.8 in)
1934	73.2 mm (2.9 in)
1935	60.5 mm (2.4 in)
1936	66.8 mm (2.6 in)
1937	61.0 mm (2.4 in)
1938	42.2 mm (1.7 in)
1939	64.8 mm (2.6 in)
1940	113.8 mm (4.5 in)
1941	44.2 mm (1.7 in)
1942	50.8 mm (2.0 in)
1943	63.5 mm (2.5 in)
1944	57.4 mm (2.3 in)
1945	47.0 mm (1.9 in)
1946	35.6 mm (1.4 in)
1947	48.5 mm (1.9 in)
1948	59.7 mm (2.4 in)
1949	55.6 mm (2.2 in)
1950	35.1 mm (1.4 in)
1951	37.3 mm (1.5 in)
1952	49.0 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Blacksburg, 1893 to 1952. The record is 172.3 mm (6.8 in) in 1940, marked on the chart; the median year is 92.6 mm (3.6 in).

Wettest five days (Rx5day) at Blacksburg by year
Year	Wettest five days (Rx5day)
1893	24.6 mm (1.0 in)
1894	56.2 mm (2.2 in)
1895	75.8 mm (3.0 in)
1896	53.9 mm (2.1 in)
1897	93.7 mm (3.7 in)
1898	77.5 mm (3.1 in)
1899	118.9 mm (4.7 in)
1900	120.2 mm (4.7 in)
1901	115.1 mm (4.5 in)
1902	85.1 mm (3.4 in)
1903	94.8 mm (3.7 in)
1904	72.9 mm (2.9 in)
1905	108.3 mm (4.3 in)
1906	64.9 mm (2.6 in)
1907	104.7 mm (4.1 in)
1908	73.4 mm (2.9 in)
1909	76.2 mm (3.0 in)
1910	154.3 mm (6.1 in)
1911	62.2 mm (2.4 in)
1912	102.8 mm (4.0 in)
1913	100.5 mm (4.0 in)
1914	91.9 mm (3.6 in)
1915	91.7 mm (3.6 in)
1916	108.3 mm (4.3 in)
1917	104.9 mm (4.1 in)
1918	131.3 mm (5.2 in)
1919	100.9 mm (4.0 in)
1920	98.0 mm (3.9 in)
1921	115.3 mm (4.5 in)
1922	64.3 mm (2.5 in)
1923	130.3 mm (5.1 in)
1924	83.2 mm (3.3 in)
1925	60.1 mm (2.4 in)
1926	80.0 mm (3.1 in)
1927	83.8 mm (3.3 in)
1928	75.9 mm (3.0 in)
1929	93.3 mm (3.7 in)
1930	39.6 mm (1.6 in)
1931	111.9 mm (4.4 in)
1932	85.4 mm (3.4 in)
1933	111.8 mm (4.4 in)
1934	103.4 mm (4.1 in)
1935	90.0 mm (3.5 in)
1936	78.5 mm (3.1 in)
1937	115.4 mm (4.5 in)
1938	94.7 mm (3.7 in)
1939	130.3 mm (5.1 in)
1940	172.3 mm (6.8 in)
1941	112.0 mm (4.4 in)
1942	95.5 mm (3.8 in)
1943	123.1 mm (4.8 in)
1944	72.2 mm (2.8 in)
1945	97.5 mm (3.8 in)
1946	55.0 mm (2.2 in)
1947	70.1 mm (2.8 in)
1948	128.5 mm (5.1 in)
1949	87.4 mm (3.4 in)
1950	67.8 mm (2.7 in)
1951	74.9 mm (2.9 in)
1952	87.1 mm (3.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Blacksburg, 1893 to 1952. The record is 33 days in 1920, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Blacksburg by year
Year	Longest dry spell (CDD)
1893	1 day
1894	10 days
1895	14 days
1896	1 day
1897	1 day
1898	17 days
1899	17 days
1900	17 days
1901	20 days
1902	18 days
1903	17 days
1904	19 days
1905	14 days
1906	16 days
1907	19 days
1908	20 days
1909	16 days
1910	21 days
1911	14 days
1912	15 days
1913	15 days
1914	23 days
1915	22 days
1916	15 days
1917	14 days
1918	17 days
1919	21 days
1920	33 days
1921	27 days
1922	24 days
1923	13 days
1924	26 days
1925	20 days
1926	13 days
1927	16 days
1928	13 days
1929	18 days
1930	19 days
1931	28 days
1932	13 days
1933	25 days
1934	17 days
1935	28 days
1936	19 days
1937	11 days
1938	22 days
1939	25 days
1940	16 days
1941	28 days
1942	26 days
1943	27 days
1944	23 days
1945	13 days
1946	15 days
1947	15 days
1948	13 days
1949	18 days
1950	17 days
1951	14 days
1952	21 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

53 years with a frost

Across 53 years with a frost, the median last spring frost at Blacksburg falls on 29 April and the median first autumn frost on 8 October, which leaves a median of 159 days between them.

Fitted over all years, the growing season changes by +2.7 days per decade at this station.

Frost dates and growing season at Blacksburg
Measure	Median, all years	Earliest period	Recent period (1919 to 1951)	Recent against earliest	Fitted trend
Last spring frost	29 April	n/a	28 April	n/a	-1.6 days per decade
First autumn frost	8 October	n/a	9 October	n/a	+1.1 days per decade
Growing days	159 days	n/a	162 days	n/a	+2.7 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.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Blacksburg standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Blacksburg 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).