Record envelope, standing records and threshold days for Onley 1 S (USC00446362), Virginia, United States, with 38 years of record.
Key Facts for Onley 1 S
Onley 1 S (USC00446362) is a weather station in Virginia, United States at 37.68 latitude and -75.72 longitude, 12 m (39 ft) above sea level.
The station reports from 1918 to 1955, 38 years of record.
1,464 records set at Onley 1 S still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Onley 1 S tied a daily record low maximum temperature of 4.4 C (39.9 F) on 30 November 1955.
About the Station
Location: Virginia, United States, 37.68 latitude, -75.72 longitude.
Elevation: 12 m (39 ft).
Period of record: 1918 to 1955, 38 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 Onley 1 S. 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 Onley 1 S, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-17.8 C (0.0 F)
n/a
n/a
Feb
26.7 C (80.1 F)
-19.4 C (-2.9 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-9.4 C (15.1 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-6.7 C (19.9 F)
n/a
n/a
May
36.1 C (97.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jun
38.9 C (102.0 F)
4.4 C (39.9 F)
n/a
n/a
Jul
39.4 C (102.9 F)
8.9 C (48.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
8.3 C (46.9 F)
n/a
n/a
Sep
36.7 C (98.1 F)
3.3 C (37.9 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-4.4 C (24.1 F)
n/a
n/a
Nov
30.6 C (87.1 F)
-8.9 C (16.0 F)
n/a
n/a
Dec
25.6 C (78.1 F)
-15.0 C (5.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Onley 1 S still stand. 1925 holds the most, with 65.
Standing records at Onley 1 S by the year they were set
Year set
Standing records
1918
16
1919
37
1920
37
1921
60
1922
36
1923
39
1924
57
1925
65
1926
58
1927
52
1928
30
1929
34
1930
45
1931
45
1932
44
1933
46
1934
55
1935
39
1936
45
1937
41
1938
31
1939
36
1940
39
1941
47
1942
38
1943
44
1944
22
1945
33
1946
35
1947
39
1948
29
1949
18
1950
37
1951
26
1952
22
1953
28
1954
34
1955
25
All-Time Record Progression
1 new records
1 all-time records were set at Onley 1 S between 14 August 1953 and 14 August 1953. Each dot is a new record.
When Onley 1 S set new all-time records
Date
Kind
Detail
1953-08-14
Record daily precipitation
Record daily precipitation 264.9 mm (10.4 in)
Wettest Day of Each Month
Aug: 264.9 mm (10.4 in)
The wettest day on record for each calendar month at Onley 1 S. The most was 264.9 mm (10.4 in) on 14 August 1953.
Record daily precipitation for each month at Onley 1 S
Month
Record daily precipitation (mm)
Date
Jan
71.9 mm (2.8 in)
29 January 1937
Feb
71.1 mm (2.8 in)
2 February 1920
Mar
68.6 mm (2.7 in)
13 March 1920
Apr
92.7 mm (3.6 in)
26 April 1937
May
55.9 mm (2.2 in)
24 May 1924
Jun
120.9 mm (4.8 in)
20 June 1938
Jul
102.9 mm (4.1 in)
24 July 1938
Aug
264.9 mm (10.4 in)
14 August 1953
Sep
132.6 mm (5.2 in)
19 September 1928
Oct
88.9 mm (3.5 in)
17 October 1936
Nov
80.0 mm (3.1 in)
17 November 1935
Dec
58.4 mm (2.3 in)
2 December 1925
Period of Record Coverage
1918 to 1955
Complete yearUnder 90 percent of days
38 years of record at Onley 1 S, 1918 to 1955. 5 years have data for under 90 percent of days and are left out of rankings: 1918, 1919, 1920, 1929, 1955.
Cooler than the station meanWarmer than the station mean
One stripe for each of 29 complete years at Onley 1 S, 1919 to 1954. Blue stripes are years cooler than the station's own mean of 14.6 C (58.3 F); red stripes are warmer. The coolest year was 1924, at 13.2 C (55.7 F), and the warmest was 1949, at 15.6 C (60.1 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Onley 1 S as warming stripes, 1919 to 1954
Year
Annual mean temperature
Difference from the station mean
1919
14.3 C
-0.29 C
1923
13.6 C
-1.02 C
1924
13.2 C
-1.41 C
1925
14.5 C
-0.08 C
1930
14.7 C
+0.07 C
1931
15.0 C
+0.42 C
1932
15.2 C
+0.57 C
1933
15.0 C
+0.36 C
1934
14.2 C
-0.37 C
1935
13.9 C
-0.70 C
1936
14.1 C
-0.55 C
1937
14.4 C
-0.20 C
1938
14.6 C
-0.01 C
1939
14.6 C
-0.02 C
1940
13.5 C
-1.08 C
1941
15.2 C
+0.56 C
1942
15.4 C
+0.78 C
1943
15.1 C
+0.53 C
1944
15.0 C
+0.37 C
1945
15.0 C
+0.43 C
1946
14.8 C
+0.22 C
1947
14.1 C
-0.48 C
1948
14.4 C
-0.20 C
1949
15.6 C
+1.02 C
1950
14.5 C
-0.08 C
1951
14.6 C
+0.03 C
1952
14.9 C
+0.27 C
1953
15.3 C
+0.68 C
1954
14.7 C
+0.12 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1918 to 1955
Yearly extremes at Onley 1 S: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1926
35.9 C (96.5 F)
38
Coldest night (TNn)
-19.4 C (-2.9 F)
1934
-11.1 C (12.0 F)
38
Wettest day (Rx1day)
264.9 mm (10.4 in)
1953
68.6 mm (2.7 in)
38
Wettest five days (Rx5day)
301.0 mm (11.9 in)
1953
104.6 mm (4.1 in)
38
Longest dry spell (CDD)
43 days
1941
19 days
38
Hottest day (TXx)
The hottest day of the year at Onley 1 S, 1918 to 1955. The record is 39.4 C (102.9 F) in 1926, marked on the chart; the median year is 35.9 C (96.5 F).
Hottest day (TXx) at Onley 1 S by year
Year
Hottest day (TXx)
1918
33.3 C (91.9 F)
1919
37.2 C (99.0 F)
1920
34.4 C (93.9 F)
1921
37.2 C (99.0 F)
1922
35.6 C (96.1 F)
1923
35.0 C (95.0 F)
1924
37.8 C (100.0 F)
1925
38.9 C (102.0 F)
1926
39.4 C (102.9 F)
1927
34.4 C (93.9 F)
1928
35.6 C (96.1 F)
1929
33.9 C (93.0 F)
1930
39.4 C (102.9 F)
1931
37.2 C (99.0 F)
1932
37.8 C (100.0 F)
1933
36.1 C (97.0 F)
1934
36.1 C (97.0 F)
1935
34.4 C (93.9 F)
1936
37.2 C (99.0 F)
1937
36.7 C (98.1 F)
1938
35.0 C (95.0 F)
1939
35.6 C (96.1 F)
1940
37.8 C (100.0 F)
1941
36.1 C (97.0 F)
1942
37.8 C (100.0 F)
1943
35.6 C (96.1 F)
1944
37.8 C (100.0 F)
1945
35.6 C (96.1 F)
1946
33.3 C (91.9 F)
1947
35.6 C (96.1 F)
1948
35.6 C (96.1 F)
1949
37.2 C (99.0 F)
1950
35.6 C (96.1 F)
1951
35.6 C (96.1 F)
1952
39.4 C (102.9 F)
1953
36.1 C (97.0 F)
1954
35.6 C (96.1 F)
1955
35.6 C (96.1 F)
Coldest night (TNn)
The coldest night of the year at Onley 1 S, 1918 to 1955. The record is -19.4 C (-2.9 F) in 1934, marked on the chart; the median year is -11.1 C (12.0 F).
Coldest night (TNn) at Onley 1 S by year
Year
Coldest night (TNn)
1918
-5.0 C (23.0 F)
1919
-12.2 C (10.0 F)
1920
-12.8 C (9.0 F)
1921
-12.2 C (10.0 F)
1922
-12.2 C (10.0 F)
1923
-11.1 C (12.0 F)
1924
-13.3 C (8.1 F)
1925
-11.1 C (12.0 F)
1926
-10.6 C (12.9 F)
1927
-13.3 C (8.1 F)
1928
-10.0 C (14.0 F)
1929
-9.4 C (15.1 F)
1930
-11.1 C (12.0 F)
1931
-9.4 C (15.1 F)
1932
-10.0 C (14.0 F)
1933
-12.8 C (9.0 F)
1934
-19.4 C (-2.9 F)
1935
-15.0 C (5.0 F)
1936
-15.0 C (5.0 F)
1937
-9.4 C (15.1 F)
1938
-7.2 C (19.0 F)
1939
-7.2 C (19.0 F)
1940
-16.1 C (3.0 F)
1941
-7.2 C (19.0 F)
1942
-17.8 C (0.0 F)
1943
-11.7 C (10.9 F)
1944
-11.1 C (12.0 F)
1945
-11.1 C (12.0 F)
1946
-10.0 C (14.0 F)
1947
-11.1 C (12.0 F)
1948
-12.2 C (10.0 F)
1949
-6.1 C (21.0 F)
1950
-8.9 C (16.0 F)
1951
-11.1 C (12.0 F)
1952
-10.6 C (12.9 F)
1953
-5.0 C (23.0 F)
1954
-12.2 C (10.0 F)
1955
-10.6 C (12.9 F)
Wettest day (Rx1day)
The wettest day of the year at Onley 1 S, 1918 to 1955. The record is 264.9 mm (10.4 in) in 1953, marked on the chart; the median year is 68.6 mm (2.7 in).
Wettest day (Rx1day) at Onley 1 S by year
Year
Wettest day (Rx1day)
1918
44.5 mm (1.8 in)
1919
81.8 mm (3.2 in)
1920
71.1 mm (2.8 in)
1921
43.2 mm (1.7 in)
1922
63.5 mm (2.5 in)
1923
73.7 mm (2.9 in)
1924
67.3 mm (2.6 in)
1925
58.4 mm (2.3 in)
1926
97.8 mm (3.9 in)
1927
70.6 mm (2.8 in)
1928
132.6 mm (5.2 in)
1929
64.0 mm (2.5 in)
1930
33.8 mm (1.3 in)
1931
114.3 mm (4.5 in)
1932
94.0 mm (3.7 in)
1933
106.7 mm (4.2 in)
1934
69.9 mm (2.8 in)
1935
94.0 mm (3.7 in)
1936
116.8 mm (4.6 in)
1937
118.4 mm (4.7 in)
1938
120.9 mm (4.8 in)
1939
60.7 mm (2.4 in)
1940
41.4 mm (1.6 in)
1941
73.7 mm (2.9 in)
1942
57.2 mm (2.3 in)
1943
48.5 mm (1.9 in)
1944
67.1 mm (2.6 in)
1945
72.4 mm (2.9 in)
1946
49.8 mm (2.0 in)
1947
57.7 mm (2.3 in)
1948
90.2 mm (3.6 in)
1949
47.0 mm (1.9 in)
1950
43.4 mm (1.7 in)
1951
50.0 mm (2.0 in)
1952
41.4 mm (1.6 in)
1953
264.9 mm (10.4 in)
1954
45.2 mm (1.8 in)
1955
106.7 mm (4.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Onley 1 S, 1918 to 1955. The record is 301.0 mm (11.9 in) in 1953, marked on the chart; the median year is 104.6 mm (4.1 in).
Wettest five days (Rx5day) at Onley 1 S by year
Year
Wettest five days (Rx5day)
1918
46.5 mm (1.8 in)
1919
114.1 mm (4.5 in)
1920
93.9 mm (3.7 in)
1921
67.3 mm (2.6 in)
1922
88.9 mm (3.5 in)
1923
87.7 mm (3.5 in)
1924
76.2 mm (3.0 in)
1925
73.7 mm (2.9 in)
1926
275.4 mm (10.8 in)
1927
108.8 mm (4.3 in)
1928
160.0 mm (6.3 in)
1929
76.2 mm (3.0 in)
1930
56.9 mm (2.2 in)
1931
147.3 mm (5.8 in)
1932
95.0 mm (3.7 in)
1933
168.0 mm (6.6 in)
1934
99.4 mm (3.9 in)
1935
113.0 mm (4.4 in)
1936
116.8 mm (4.6 in)
1937
155.4 mm (6.1 in)
1938
206.6 mm (8.1 in)
1939
111.9 mm (4.4 in)
1940
97.8 mm (3.9 in)
1941
94.5 mm (3.7 in)
1942
101.1 mm (4.0 in)
1943
118.3 mm (4.7 in)
1944
92.2 mm (3.6 in)
1945
146.1 mm (5.8 in)
1946
95.0 mm (3.7 in)
1947
69.8 mm (2.7 in)
1948
154.5 mm (6.1 in)
1949
131.8 mm (5.2 in)
1950
108.0 mm (4.3 in)
1951
109.0 mm (4.3 in)
1952
78.2 mm (3.1 in)
1953
301.0 mm (11.9 in)
1954
56.9 mm (2.2 in)
1955
147.9 mm (5.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Onley 1 S, 1918 to 1955. The record is 43 days in 1941, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Onley 1 S by year
Year
Longest dry spell (CDD)
1918
19 days
1919
35 days
1920
27 days
1921
21 days
1922
22 days
1923
25 days
1924
25 days
1925
16 days
1926
19 days
1927
14 days
1928
18 days
1929
19 days
1930
36 days
1931
20 days
1932
21 days
1933
18 days
1934
19 days
1935
16 days
1936
14 days
1937
15 days
1938
15 days
1939
14 days
1940
13 days
1941
43 days
1942
28 days
1943
18 days
1944
20 days
1945
15 days
1946
20 days
1947
20 days
1948
12 days
1949
20 days
1950
19 days
1951
18 days
1952
22 days
1953
26 days
1954
25 days
1955
15 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
29 years with a frost
Across 29 years with a frost, the median last spring frost at Onley 1 S falls on 7 April and the median first autumn frost on 9 November, which leaves a median of 215 days between them.
Fitted over all years, the growing season changes by +1.4 days per decade at this station.
Frost dates and growing season at Onley 1 S
Measure
Median, all years
Earliest period
Recent period (1919 to 1954)
Recent against earliest
Fitted trend
Last spring frost
7 April
n/a
7 April
n/a
+0.1 days per decade
First autumn frost
9 November
n/a
9 November
n/a
+1.5 days per decade
Growing days
215 days
n/a
215 days
n/a
+1.4 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
33 years, 1919 to 1955
A day with at least 70.4 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 241.4 mm (9.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Onley 1 S: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
70.4 mm (2.8 in)
5 years
103.3 mm (4.1 in)
10 years
129.5 mm (5.1 in)
25 years
168.6 mm (6.6 in)
50 years
202.7 mm (8.0 in)
Longer than the 33 years of record
100 years
241.4 mm (9.5 in)
Longer than the 33 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, 33 years of values from 1919 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: 264.9 mm (10.4 in) in 1953; 132.6 mm (5.2 in) in 1928; 120.9 mm (4.8 in) in 1938.
Download the Data
Data for Onley 1 S standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Onley 1 S 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.