White Rock Dam Weather Records (USC00218947)

Record envelope, standing records and threshold days for White Rock Dam (USC00218947), Minnesota, United States, with 88 years of record.

Key Facts for White Rock Dam

White Rock Dam (USC00218947) is a weather station in Minnesota, United States at 45.86 latitude and -96.57 longitude, 312 m (1,023 ft) above sea level.
The station reports from 1939 to 2026, 88 years of record.
1,464 records set at White Rock Dam still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Minnesota, United States, 45.86 latitude, -96.57 longitude.
Elevation: 312 m (1,023 ft).
Period of record: 1939 to 2026, 88 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

40 days at or beyond a record

The band shows the record high and record low for each calendar day at White Rock Dam. The lines show the 2026 daily maximum and minimum. 40 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at White Rock Dam, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	14.4 C (57.9 F)	-36.1 C (-33.0 F)	6.1 C (43.0 F)	-31.7 C (-25.1 F)
Feb	17.2 C (63.0 F)	-32.8 C (-27.0 F)	10.0 C (50.0 F)	-28.9 C (-20.0 F)
Mar	26.1 C (79.0 F)	-27.8 C (-18.0 F)	20.0 C (68.0 F)	-14.4 C (6.1 F)
Apr	32.8 C (91.0 F)	-14.4 C (6.1 F)	23.3 C (73.9 F)	-10.0 C (14.0 F)
May	35.6 C (96.1 F)	-5.6 C (21.9 F)	33.9 C (93.0 F)	1.7 C (35.1 F)
Jun	37.8 C (100.0 F)	3.3 C (37.9 F)	33.9 C (93.0 F)	3.3 C (37.9 F)
Jul	39.4 C (102.9 F)	6.1 C (43.0 F)	30.6 C (87.1 F)	7.8 C (46.0 F)
Aug	37.8 C (100.0 F)	2.8 C (37.0 F)	30.6 C (87.1 F)	6.1 C (43.0 F)
Sep	36.7 C (98.1 F)	-5.0 C (23.0 F)	33.3 C (91.9 F)	2.8 C (37.0 F)
Oct	35.0 C (95.0 F)	-12.8 C (9.0 F)	32.2 C (90.0 F)	-3.3 C (26.1 F)
Nov	26.7 C (80.1 F)	-24.4 C (-11.9 F)	18.3 C (64.9 F)	-12.2 C (10.0 F)
Dec	21.1 C (70.0 F)	-32.2 C (-26.0 F)	8.3 C (46.9 F)	-25.6 C (-14.1 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at White Rock Dam still stand. 2004 holds the most, with 80.

Standing records at White Rock Dam by the year they were set
Year set	Standing records
1939	39
1940	35
2000	56
2001	38
2002	52
2003	56
2004	80
2005	67
2006	55
2007	57
2008	51
2009	59
2010	47
2011	59
2012	66
2013	80
2014	52
2015	64
2016	46
2017	51
2018	45
2019	57
2020	48
2021	71
2022	42
2023	11
2024	15
2025	65

Wettest Day of Each Month

Jul: 153.2 mm (6.0 in)

The wettest day on record for each calendar month at White Rock Dam. The most was 153.2 mm (6.0 in) on 8 July 1950.

Record daily precipitation for each month at White Rock Dam
Month	Record daily precipitation (mm)	Date
Jan	21.3 mm (0.8 in)	30 January 2001
Feb	22.1 mm (0.9 in)	24 February 2007
Mar	41.1 mm (1.6 in)	28 March 1940
Apr	85.3 mm (3.4 in)	16 April 2012
May	63.5 mm (2.5 in)	5 May 2007
Jun	72.9 mm (2.9 in)	2 June 2007
Jul	153.2 mm (6.0 in)	8 July 1950
Aug	73.7 mm (2.9 in)	27 August 2021
Sep	67.3 mm (2.6 in)	6 September 2004
Oct	58.2 mm (2.3 in)	5 October 2016
Nov	42.2 mm (1.7 in)	19 November 2024
Dec	30.2 mm (1.2 in)	30 December 2005

Period of Record Coverage

1939 to 2025

28 years of record at White Rock Dam, 1939 to 2025. 12 years have data for under 90 percent of days and are left out of rankings: 1939, 1940, 2000, 2001, 2002, 2003, 2018, 2020 and others.

Days with data per year at White Rock Dam
Year	Days with data	Share of year	Complete
1939	100	27%	No
1940	150	41%	No
2000	210	57%	No
2001	240	66%	No
2002	251	69%	No
2003	301	82%	No
2004	353	96%	Yes
2005	364	100%	Yes
2006	364	100%	Yes
2007	360	99%	Yes
2008	337	92%	Yes
2009	364	100%	Yes
2010	364	100%	Yes
2011	362	99%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	363	99%	Yes
2018	299	82%	No
2019	363	99%	Yes
2020	235	64%	No
2021	357	98%	Yes
2022	313	86%	No
2023	67	18%	No
2024	114	31%	No
2025	310	85%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

14 complete years, 2005 to 2021

One stripe for each of 14 complete years at White Rock Dam, 2005 to 2021. Blue stripes are years cooler than the station's own mean of 6.1 C (43.0 F); red stripes are warmer. The coolest year was 2013, at 4.2 C (39.6 F), and the warmest was 2016, at 7.9 C (46.3 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at White Rock Dam as warming stripes, 2005 to 2021
Year	Annual mean temperature	Difference from the station mean
2005	6.7 C	+0.62 C
2006	7.5 C	+1.41 C
2007	6.1 C	+0.05 C
2009	4.4 C	-1.71 C
2010	5.8 C	-0.28 C
2011	5.2 C	-0.93 C
2012	7.7 C	+1.58 C
2013	4.2 C	-1.86 C
2014	4.6 C	-1.52 C
2015	7.3 C	+1.16 C
2016	7.9 C	+1.84 C
2017	6.7 C	+0.61 C
2019	4.4 C	-1.70 C
2021	6.9 C	+0.79 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

1939 to 2026

Yearly extremes at White Rock Dam: 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)	1940	35.0 C (95.0 F)	29
Coldest night (TNn)	-36.1 C (-33.0 F)	2010	-31.1 C (-24.0 F)	29
Wettest day (Rx1day)	153.2 mm (6.0 in)	1950	55.1 mm (2.2 in)	33
Wettest five days (Rx5day)	203.2 mm (8.0 in)	1950	77.8 mm (3.1 in)	33
Longest dry spell (CDD)	45 days	2005	30 days	33

Hottest day (TXx)

The hottest day of the year at White Rock Dam, 1939 to 2026. The record is 39.4 C (102.9 F) in 1940, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at White Rock Dam by year
Year	Hottest day (TXx)
1939	36.7 C (98.1 F)
1940	39.4 C (102.9 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
2000	35.6 C (96.1 F)
2001	36.1 C (97.0 F)
2002	36.1 C (97.0 F)
2003	36.1 C (97.0 F)
2004	34.4 C (93.9 F)
2005	34.4 C (93.9 F)
2006	38.3 C (100.9 F)
2007	36.7 C (98.1 F)
2008	34.4 C (93.9 F)
2009	33.9 C (93.0 F)
2010	35.0 C (95.0 F)
2011	35.6 C (96.1 F)
2012	35.6 C (96.1 F)
2013	35.0 C (95.0 F)
2014	33.9 C (93.0 F)
2015	35.0 C (95.0 F)
2016	35.6 C (96.1 F)
2017	35.0 C (95.0 F)
2018	32.8 C (91.0 F)
2019	34.4 C (93.9 F)
2020	37.2 C (99.0 F)
2021	37.8 C (100.0 F)
2022	37.8 C (100.0 F)
2023	25.0 C (77.0 F)
2024	31.1 C (88.0 F)
2025	33.9 C (93.0 F)
2026	34.4 C (93.9 F)

Coldest night (TNn)

The coldest night of the year at White Rock Dam, 1939 to 2026. The record is -36.1 C (-33.0 F) in 2010, marked on the chart; the median year is -31.1 C (-24.0 F).

Coldest night (TNn) at White Rock Dam by year
Year	Coldest night (TNn)
1939	-21.1 C (-6.0 F)
1940	-31.1 C (-24.0 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
2000	-30.0 C (-22.0 F)
2001	-29.4 C (-20.9 F)
2002	-22.8 C (-9.0 F)
2003	-28.9 C (-20.0 F)
2004	-33.9 C (-29.0 F)
2005	-32.8 C (-27.0 F)
2006	-27.8 C (-18.0 F)
2007	-29.4 C (-20.9 F)
2008	-32.2 C (-26.0 F)
2009	-34.4 C (-29.9 F)
2010	-36.1 C (-33.0 F)
2011	-32.8 C (-27.0 F)
2012	-27.2 C (-17.0 F)
2013	-32.2 C (-26.0 F)
2014	-32.2 C (-26.0 F)
2015	-28.9 C (-20.0 F)
2016	-31.7 C (-25.1 F)
2017	-31.7 C (-25.1 F)
2018	-31.1 C (-24.0 F)
2019	-36.1 C (-33.0 F)
2020	-30.0 C (-22.0 F)
2021	-32.8 C (-27.0 F)
2022	-31.7 C (-25.1 F)
2023	-16.1 C (3.0 F)
2024	-23.3 C (-9.9 F)
2025	-31.7 C (-25.1 F)
2026	-28.9 C (-20.0 F)

Wettest day (Rx1day)

The wettest day of the year at White Rock Dam, 1939 to 2026. The record is 153.2 mm (6.0 in) in 1950, marked on the chart; the median year is 55.1 mm (2.2 in).

Wettest day (Rx1day) at White Rock Dam by year
Year	Wettest day (Rx1day)
1939	8.4 mm (0.33 in)
1940	47.8 mm (1.9 in)
1948	31.8 mm (1.3 in)
1949	61.7 mm (2.4 in)
1950	153.2 mm (6.0 in)
1951	35.6 mm (1.4 in)
2000	49.5 mm (1.9 in)
2001	43.4 mm (1.7 in)
2002	70.1 mm (2.8 in)
2003	43.7 mm (1.7 in)
2004	67.3 mm (2.6 in)
2005	57.2 mm (2.3 in)
2006	38.9 mm (1.5 in)
2007	72.9 mm (2.9 in)
2008	66.8 mm (2.6 in)
2009	55.1 mm (2.2 in)
2010	36.3 mm (1.4 in)
2011	71.6 mm (2.8 in)
2012	85.3 mm (3.4 in)
2013	50.8 mm (2.0 in)
2014	31.2 mm (1.2 in)
2015	62.2 mm (2.4 in)
2016	71.6 mm (2.8 in)
2017	44.2 mm (1.7 in)
2018	51.1 mm (2.0 in)
2019	59.7 mm (2.4 in)
2020	31.5 mm (1.2 in)
2021	73.7 mm (2.9 in)
2022	58.2 mm (2.3 in)
2023	15.7 mm (0.6 in)
2024	42.2 mm (1.7 in)
2025	60.7 mm (2.4 in)
2026	62.5 mm (2.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at White Rock Dam, 1939 to 2026. The record is 203.2 mm (8.0 in) in 1950, marked on the chart; the median year is 77.8 mm (3.1 in).

Wettest five days (Rx5day) at White Rock Dam by year
Year	Wettest five days (Rx5day)
1939	12.8 mm (0.5 in)
1940	48.2 mm (1.9 in)
1948	56.4 mm (2.2 in)
1949	126.7 mm (5.0 in)
1950	203.2 mm (8.0 in)
1951	87.9 mm (3.5 in)
2000	51.1 mm (2.0 in)
2001	67.5 mm (2.7 in)
2002	91.4 mm (3.6 in)
2003	99.9 mm (3.9 in)
2004	74.7 mm (2.9 in)
2005	77.8 mm (3.1 in)
2006	57.2 mm (2.3 in)
2007	76.5 mm (3.0 in)
2008	78.8 mm (3.1 in)
2009	64.0 mm (2.5 in)
2010	81.6 mm (3.2 in)
2011	87.3 mm (3.4 in)
2012	117.9 mm (4.6 in)
2013	99.8 mm (3.9 in)
2014	79.9 mm (3.1 in)
2015	76.1 mm (3.0 in)
2016	112.3 mm (4.4 in)
2017	74.3 mm (2.9 in)
2018	65.4 mm (2.6 in)
2019	84.4 mm (3.3 in)
2020	46.7 mm (1.8 in)
2021	111.8 mm (4.4 in)
2022	89.2 mm (3.5 in)
2023	24.3 mm (1.0 in)
2024	49.8 mm (2.0 in)
2025	89.9 mm (3.5 in)
2026	64.3 mm (2.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at White Rock Dam, 1939 to 2026. The record is 45 days in 2005, marked on the chart; the median year is 30 days.

Longest dry spell (CDD) at White Rock Dam by year
Year	Longest dry spell (CDD)
1939	22 days
1940	31 days
1948	16 days
1949	20 days
1950	41 days
1951	32 days
2000	17 days
2001	29 days
2002	40 days
2003	30 days
2004	30 days
2005	45 days
2006	33 days
2007	39 days
2008	31 days
2009	28 days
2010	28 days
2011	38 days
2012	28 days
2013	24 days
2014	35 days
2015	25 days
2016	30 days
2017	41 days
2018	37 days
2019	20 days
2020	31 days
2021	31 days
2022	18 days
2023	14 days
2024	23 days
2025	24 days
2026	16 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 White Rock Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for White Rock Dam 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 2026-10-13 (13 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).