John Flannagan Lake Weather Records (USC00444410)

Record envelope, standing records and threshold days for John Flannagan Lake (USC00444410), Virginia, United States, with 58 years of record.

Key Facts for John Flannagan Lake

John Flannagan Lake (USC00444410) is a weather station in Virginia, United States at 37.23 latitude and -82.35 longitude, 454 m (1,488 ft) above sea level.
The station reports from 1969 to 2026, 58 years of record.
1,464 records set at John Flannagan Lake still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
John Flannagan Lake set a daily record precipitation of 24.9 mm (1.0 in) on 5 August 2026.

About the Station

Location: Virginia, United States, 37.23 latitude, -82.35 longitude.
Elevation: 454 m (1,488 ft).
Period of record: 1969 to 2026, 58 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

28 days at or beyond a record

The band shows the record high and record low for each calendar day at John Flannagan Lake. The lines show the 2026 daily maximum and minimum. 28 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at John Flannagan Lake, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	22.2 C (72.0 F)	-23.9 C (-11.0 F)	17.2 C (63.0 F)	-16.1 C (3.0 F)
Feb	26.7 C (80.1 F)	-21.7 C (-7.1 F)	19.4 C (66.9 F)	-19.4 C (-2.9 F)
Mar	30.0 C (86.0 F)	-18.3 C (-0.9 F)	29.4 C (84.9 F)	-7.8 C (18.0 F)
Apr	34.4 C (93.9 F)	-6.7 C (19.9 F)	29.4 C (84.9 F)	-0.6 C (30.9 F)
May	35.6 C (96.1 F)	-0.6 C (30.9 F)	31.7 C (89.1 F)	-0.6 C (30.9 F)
Jun	41.1 C (106.0 F)	5.0 C (41.0 F)	31.1 C (88.0 F)	9.4 C (48.9 F)
Jul	42.8 C (109.0 F)	9.4 C (48.9 F)	35.0 C (95.0 F)	13.9 C (57.0 F)
Aug	40.6 C (105.1 F)	8.3 C (46.9 F)	32.2 C (90.0 F)	12.2 C (54.0 F)
Sep	36.1 C (97.0 F)	3.3 C (37.9 F)	35.0 C (95.0 F)	8.3 C (46.9 F)
Oct	35.0 C (95.0 F)	-4.4 C (24.1 F)	28.3 C (82.9 F)	7.8 C (46.0 F)
Nov	28.9 C (84.0 F)	-11.7 C (10.9 F)	n/a	n/a
Dec	25.0 C (77.0 F)	-17.8 C (0.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at John Flannagan Lake still stand. 2001 holds the most, with 120.

Standing records at John Flannagan Lake by the year they were set
Year set	Standing records
1970	13
1974	33
1975	20
1976	113
1977	70
1978	29
1999	12
2000	54
2001	120
2002	47
2003	38
2004	56
2005	34
2006	48
2007	50
2008	45
2009	43
2010	63
2011	43
2012	59
2013	35
2014	50
2015	48
2016	54
2017	36
2018	36
2019	54
2020	29
2021	22
2022	9
2023	33
2024	14
2025	23
2026	31

All-Time Record Progression

2 new records

2 all-time records were set at John Flannagan Lake between 27 July 2001 and 6 September 2011. Each dot is a new record.

When John Flannagan Lake set new all-time records
Date	Kind	Detail
2001-07-27	Record daily precipitation	Record daily precipitation 101.6 mm (4.0 in)
2011-09-06	Record daily precipitation	Record daily precipitation 109.5 mm (4.3 in)

Wettest Day of Each Month

Sep: 109.5 mm (4.3 in)

The wettest day on record for each calendar month at John Flannagan Lake. The most was 109.5 mm (4.3 in) on 6 September 2011.

Record daily precipitation for each month at John Flannagan Lake
Month	Record daily precipitation (mm)	Date
Jan	46.5 mm (1.8 in)	21 January 1972
Feb	93.2 mm (3.7 in)	17 February 2003
Mar	97.3 mm (3.8 in)	18 March 2002
Apr	78.5 mm (3.1 in)	5 April 1977
May	86.4 mm (3.4 in)	7 May 1971
Jun	63.5 mm (2.5 in)	10 June 1998
Jul	101.6 mm (4.0 in)	27 July 2001
Aug	69.9 mm (2.8 in)	18 August 2021
Sep	109.5 mm (4.3 in)	6 September 2011
Oct	66.8 mm (2.6 in)	3 October 1996
Nov	55.4 mm (2.2 in)	27 November 1973
Dec	62.5 mm (2.5 in)	3 December 1991

Period of Record Coverage

1970 to 2026

34 years of record at John Flannagan Lake, 1970 to 2026. 34 years have data for under 90 percent of days and are left out of rankings: 1970, 1974, 1975, 1976, 1977, 1978, 1999, 2000 and others.

Days with data per year at John Flannagan Lake
Year	Days with data	Share of year	Complete
1970	59	16%	No
1974	153	42%	No
1975	91	25%	No
1976	303	83%	No
1977	179	49%	No
1978	88	24%	No
1999	70	19%	No
2000	259	71%	No
2001	275	75%	No
2002	249	68%	No
2003	243	67%	No
2004	295	81%	No
2005	224	61%	No
2006	234	64%	No
2007	230	63%	No
2008	223	61%	No
2009	230	63%	No
2010	199	55%	No
2011	222	61%	No
2012	235	64%	No
2013	198	54%	No
2014	252	69%	No
2015	209	57%	No
2016	196	54%	No
2017	187	51%	No
2018	127	35%	No
2019	210	58%	No
2020	196	54%	No
2021	163	45%	No
2022	71	19%	No
2023	214	59%	No
2024	100	27%	No
2025	93	25%	No
2026	156	43%	No

Latest Records

Latest records at John Flannagan Lake
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
5 August 2026	John Flannagan Lake, US	daily rain	24.9 mm (1.0 in)	4.3 mm (0.17 in)	52 years	20 of 100 (Routine)
12 March 2026	John Flannagan Lake, US	daily rain	27.7 mm (1.1 in)	15.5 mm (0.6 in)	52 years	36 of 100 (Notable)
5 September 2025	John Flannagan Lake, US	daily rain	29.0 mm (1.1 in)	4.9 mm (0.19 in)	22 years	14 of 100 (Routine)
21 July 2025	John Flannagan Lake, US	daily rain	20.8 mm (0.8 in)	8.1 mm (0.32 in)	12 years	15 of 100 (Routine)
17 July 2025	John Flannagan Lake, US	daily rain	23.1 mm (0.9 in)	1.5 mm (0.06 in)	44 years	19 of 100 (Routine)
10 July 2025	John Flannagan Lake, US	daily rain	56.4 mm (2.2 in)	36.3 mm (1.4 in)	16 years	40 of 100 (Notable)
7 February 2025	John Flannagan Lake, US	daily rain	30.2 mm (1.2 in)	5.3 mm (0.21 in)	6 years	11 of 100 (Routine)
6 January 2025	John Flannagan Lake, US	daily rain	41.9 mm (1.6 in)	26.2 mm (1.0 in)	21 years	44 of 100 (Notable)
11 December 2024	John Flannagan Lake, US	daily rain	31.2 mm (1.2 in)	17.0 mm (0.7 in)	12 years	26 of 100 (Routine)
22 November 2024	John Flannagan Lake, US	daily snowfall (Tie)	5.1 cm (2.0 in)	tie	48 years	4 of 100 (Routine)
22 November 2024	John Flannagan Lake, US	daily snow depth (Tie)	5.1 cm (2.0 in)	tie	48 years	4 of 100 (Routine)
20 November 2024	John Flannagan Lake, US	daily rain	19.8 mm (0.8 in)	2.8 mm (0.11 in)	50 years	20 of 100 (Routine)
15 November 2024	John Flannagan Lake, US	daily rain	31.0 mm (1.2 in)	10.7 mm (0.4 in)	17 years	22 of 100 (Routine)
26 September 2024	John Flannagan Lake, US	daily rain	59.9 mm (2.4 in)	36.0 mm (1.4 in)	24 years	41 of 100 (Notable)
25 September 2024	John Flannagan Lake, US	daily rain	25.4 mm (1.0 in)	1.0 mm (0.04 in)	36 years	15 of 100 (Routine)
29 February 2024	John Flannagan Lake, US	daily rain	15.5 mm (0.6 in)	7.9 mm (0.31 in)	40 years	20 of 100 (Routine)
17 January 2024	John Flannagan Lake, US	daily rain	20.3 mm (0.8 in)	4.6 mm (0.18 in)	0 years	10 of 100 (Routine)
10 January 2024	John Flannagan Lake, US	daily rain	22.9 mm (0.9 in)	1.8 mm (0.07 in)	24 years	14 of 100 (Routine)
17 January 2023	John Flannagan Lake, US	daily rain	15.7 mm (0.6 in)	6.8 mm (0.27 in)	15 years	17 of 100 (Routine)
14 March 2022	John Flannagan Lake, US	daily snow depth	7.6 cm (3.0 in)	5.1 cm (2.0 in)	4 years	19 of 100 (Routine)

Extremes by Year

1969 to 2026

Yearly extremes at John Flannagan Lake: 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)	2001	33.9 C (93.0 F)	34
Coldest night (TNn)	-23.9 C (-11.0 F)	1977	-15.0 C (5.0 F)	34
Wettest day (Rx1day)	109.5 mm (4.3 in)	2011	52.0 mm (2.0 in)	58
Wettest five days (Rx5day)	165.4 mm (6.5 in)	1984	81.4 mm (3.2 in)	58
Longest dry spell (CDD)	25 days	2001	14 days	58

Hottest day (TXx)

The hottest day of the year at John Flannagan Lake, 1969 to 2026. The record is 42.8 C (109.0 F) in 2001, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at John Flannagan Lake by year
Year	Hottest day (TXx)
1969	n/a
1970	22.2 C (72.0 F)
1971	n/a
1972	n/a
1973	n/a
1974	35.0 C (95.0 F)
1975	36.1 C (97.0 F)
1976	36.1 C (97.0 F)
1977	27.2 C (81.0 F)
1978	27.2 C (81.0 F)
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	30.0 C (86.0 F)
2000	34.4 C (93.9 F)
2001	42.8 C (109.0 F)
2002	33.3 C (91.9 F)
2003	32.8 C (91.0 F)
2004	31.7 C (89.1 F)
2005	33.9 C (93.0 F)
2006	33.3 C (91.9 F)
2007	36.7 C (98.1 F)
2008	33.3 C (91.9 F)
2009	31.1 C (88.0 F)
2010	34.4 C (93.9 F)
2011	35.0 C (95.0 F)
2012	36.7 C (98.1 F)
2013	32.2 C (90.0 F)
2014	31.7 C (89.1 F)
2015	34.4 C (93.9 F)
2016	36.7 C (98.1 F)
2017	33.9 C (93.0 F)
2018	34.4 C (93.9 F)
2019	36.1 C (97.0 F)
2020	33.9 C (93.0 F)
2021	32.2 C (90.0 F)
2022	32.2 C (90.0 F)
2023	32.8 C (91.0 F)
2024	33.9 C (93.0 F)
2025	31.1 C (88.0 F)
2026	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at John Flannagan Lake, 1969 to 2026. The record is -23.9 C (-11.0 F) in 1977, marked on the chart; the median year is -15.0 C (5.0 F).

Coldest night (TNn) at John Flannagan Lake by year
Year	Coldest night (TNn)
1969	n/a
1970	-15.0 C (5.0 F)
1971	n/a
1972	n/a
1973	n/a
1974	-4.4 C (24.1 F)
1975	-5.0 C (23.0 F)
1976	-18.3 C (-0.9 F)
1977	-23.9 C (-11.0 F)
1978	-21.1 C (-6.0 F)
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	-11.1 C (12.0 F)
2000	-17.8 C (0.0 F)
2001	-16.7 C (1.9 F)
2002	-12.8 C (9.0 F)
2003	-15.0 C (5.0 F)
2004	-16.7 C (1.9 F)
2005	-15.0 C (5.0 F)
2006	-13.3 C (8.1 F)
2007	-21.7 C (-7.1 F)
2008	-15.0 C (5.0 F)
2009	-17.2 C (1.0 F)
2010	-13.9 C (7.0 F)
2011	-13.9 C (7.0 F)
2012	-11.7 C (10.9 F)
2013	-12.2 C (10.0 F)
2014	-20.6 C (-5.1 F)
2015	-18.3 C (-0.9 F)
2016	-13.3 C (8.1 F)
2017	-14.4 C (6.1 F)
2018	-19.4 C (-2.9 F)
2019	-15.0 C (5.0 F)
2020	-11.1 C (12.0 F)
2021	-16.1 C (3.0 F)
2022	-13.9 C (7.0 F)
2023	-10.6 C (12.9 F)
2024	-17.2 C (1.0 F)
2025	-14.4 C (6.1 F)
2026	-19.4 C (-2.9 F)

Wettest day (Rx1day)

The wettest day of the year at John Flannagan Lake, 1969 to 2026. The record is 109.5 mm (4.3 in) in 2011, marked on the chart; the median year is 52.0 mm (2.0 in).

Wettest day (Rx1day) at John Flannagan Lake by year
Year	Wettest day (Rx1day)
1969	20.3 mm (0.8 in)
1970	37.8 mm (1.5 in)
1971	86.4 mm (3.4 in)
1972	60.5 mm (2.4 in)
1973	55.4 mm (2.2 in)
1974	53.8 mm (2.1 in)
1975	39.6 mm (1.6 in)
1976	65.8 mm (2.6 in)
1977	78.5 mm (3.1 in)
1978	52.6 mm (2.1 in)
1979	60.7 mm (2.4 in)
1980	68.6 mm (2.7 in)
1981	38.4 mm (1.5 in)
1982	47.8 mm (1.9 in)
1983	57.7 mm (2.3 in)
1984	63.2 mm (2.5 in)
1985	85.6 mm (3.4 in)
1986	44.5 mm (1.8 in)
1987	37.8 mm (1.5 in)
1988	34.0 mm (1.3 in)
1989	55.4 mm (2.2 in)
1990	40.9 mm (1.6 in)
1991	62.5 mm (2.5 in)
1992	53.8 mm (2.1 in)
1993	48.5 mm (1.9 in)
1994	54.1 mm (2.1 in)
1995	35.8 mm (1.4 in)
1996	66.8 mm (2.6 in)
1997	38.6 mm (1.5 in)
1998	63.5 mm (2.5 in)
1999	38.1 mm (1.5 in)
2000	40.1 mm (1.6 in)
2001	101.6 mm (4.0 in)
2002	97.3 mm (3.8 in)
2003	93.2 mm (3.7 in)
2004	48.0 mm (1.9 in)
2005	60.5 mm (2.4 in)
2006	44.2 mm (1.7 in)
2007	27.4 mm (1.1 in)
2008	28.7 mm (1.1 in)
2009	59.2 mm (2.3 in)
2010	55.9 mm (2.2 in)
2011	109.5 mm (4.3 in)
2012	44.7 mm (1.8 in)
2013	44.7 mm (1.8 in)
2014	44.7 mm (1.8 in)
2015	51.3 mm (2.0 in)
2016	45.0 mm (1.8 in)
2017	45.0 mm (1.8 in)
2018	34.8 mm (1.4 in)
2019	38.4 mm (1.5 in)
2020	55.6 mm (2.2 in)
2021	69.9 mm (2.8 in)
2022	35.1 mm (1.4 in)
2023	50.8 mm (2.0 in)
2024	59.9 mm (2.4 in)
2025	56.4 mm (2.2 in)
2026	28.2 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at John Flannagan Lake, 1969 to 2026. The record is 165.4 mm (6.5 in) in 1984, marked on the chart; the median year is 81.4 mm (3.2 in).

Wettest five days (Rx5day) at John Flannagan Lake by year
Year	Wettest five days (Rx5day)
1969	31.0 mm (1.2 in)
1970	75.4 mm (3.0 in)
1971	100.6 mm (4.0 in)
1972	107.6 mm (4.2 in)
1973	98.7 mm (3.9 in)
1974	80.0 mm (3.1 in)
1975	85.1 mm (3.4 in)
1976	123.0 mm (4.8 in)
1977	154.7 mm (6.1 in)
1978	82.3 mm (3.2 in)
1979	87.0 mm (3.4 in)
1980	92.9 mm (3.7 in)
1981	58.3 mm (2.3 in)
1982	87.6 mm (3.4 in)
1983	87.2 mm (3.4 in)
1984	165.4 mm (6.5 in)
1985	90.7 mm (3.6 in)
1986	77.7 mm (3.1 in)
1987	87.0 mm (3.4 in)
1988	57.0 mm (2.2 in)
1989	132.5 mm (5.2 in)
1990	78.1 mm (3.1 in)
1991	128.8 mm (5.1 in)
1992	118.0 mm (4.6 in)
1993	60.0 mm (2.4 in)
1994	104.4 mm (4.1 in)
1995	71.6 mm (2.8 in)
1996	141.3 mm (5.6 in)
1997	69.4 mm (2.7 in)
1998	103.5 mm (4.1 in)
1999	71.9 mm (2.8 in)
2000	69.6 mm (2.7 in)
2001	152.7 mm (6.0 in)
2002	114.0 mm (4.5 in)
2003	72.6 mm (2.9 in)
2004	116.8 mm (4.6 in)
2005	77.4 mm (3.0 in)
2006	61.2 mm (2.4 in)
2007	49.3 mm (1.9 in)
2008	47.1 mm (1.9 in)
2009	61.7 mm (2.4 in)
2010	76.5 mm (3.0 in)
2011	78.2 mm (3.1 in)
2012	73.2 mm (2.9 in)
2013	82.5 mm (3.2 in)
2014	93.7 mm (3.7 in)
2015	80.4 mm (3.2 in)
2016	30.8 mm (1.2 in)
2017	40.9 mm (1.6 in)
2018	57.1 mm (2.2 in)
2019	32.3 mm (1.3 in)
2020	106.2 mm (4.2 in)
2021	101.8 mm (4.0 in)
2022	76.2 mm (3.0 in)
2023	36.8 mm (1.4 in)
2024	127.2 mm (5.0 in)
2025	95.6 mm (3.8 in)
2026	34.0 mm (1.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at John Flannagan Lake, 1969 to 2026. The record is 25 days in 2001, marked on the chart; the median year is 14 days.

Longest dry spell (CDD) at John Flannagan Lake by year
Year	Longest dry spell (CDD)
1969	6 days
1970	20 days
1971	18 days
1972	17 days
1973	18 days
1974	18 days
1975	15 days
1976	11 days
1977	15 days
1978	12 days
1979	16 days
1980	12 days
1981	15 days
1982	13 days
1983	14 days
1984	18 days
1985	12 days
1986	14 days
1987	13 days
1988	15 days
1989	13 days
1990	12 days
1991	22 days
1992	13 days
1993	17 days
1994	13 days
1995	22 days
1996	15 days
1997	20 days
1998	21 days
1999	15 days
2000	16 days
2001	25 days
2002	16 days
2003	9 days
2004	8 days
2005	22 days
2006	10 days
2007	14 days
2008	14 days
2009	16 days
2010	16 days
2011	4 days
2012	7 days
2013	4 days
2014	6 days
2015	5 days
2016	5 days
2017	5 days
2018	5 days
2019	16 days
2020	11 days
2021	10 days
2022	8 days
2023	9 days
2024	11 days
2025	9 days
2026	4 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.

Download the Data

Data for John Flannagan Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for John Flannagan Lake 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).