Yale 1 NNW Weather Records (USC00209188)

Record envelope, standing records and threshold days for Yale 1 NNW (USC00209188), Michigan, United States, with 95 years of record.

Key Facts for Yale 1 NNW

Yale 1 NNW (USC00209188) is a weather station in Michigan, United States at 43.14 latitude and -82.80 longitude, 250 m (820 ft) above sea level.
The station reports from 1926 to 2020, 95 years of record.
1,464 records set at Yale 1 NNW still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Yale 1 NNW set a daily record snowfall of 5.1 cm (2.0 in) on 23 November 2020.

About the Station

Location: Michigan, United States, 43.14 latitude, -82.80 longitude.
Elevation: 250 m (820 ft).
Period of record: 1926 to 2020, 95 years.
Eligible elements: 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 Yale 1 NNW. 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 Yale 1 NNW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.1 C (61.0 F)	-27.2 C (-17.0 F)	n/a	n/a
Feb	17.8 C (64.0 F)	-31.7 C (-25.1 F)	n/a	n/a
Mar	27.8 C (82.0 F)	-28.3 C (-18.9 F)	n/a	n/a
Apr	27.8 C (82.0 F)	-11.1 C (12.0 F)	n/a	n/a
May	33.3 C (91.9 F)	-5.6 C (21.9 F)	n/a	n/a
Jun	35.6 C (96.1 F)	1.7 C (35.1 F)	n/a	n/a
Jul	37.8 C (100.0 F)	5.6 C (42.1 F)	n/a	n/a
Aug	35.0 C (95.0 F)	2.2 C (36.0 F)	n/a	n/a
Sep	36.1 C (97.0 F)	0.0 C (32.0 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-5.6 C (21.9 F)	n/a	n/a
Nov	25.0 C (77.0 F)	-15.0 C (5.0 F)	n/a	n/a
Dec	15.6 C (60.1 F)	-26.1 C (-15.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Yale 1 NNW still stand. 2007 holds the most, with 133.

All-Time Record Progression

7 new records

7 all-time records were set at Yale 1 NNW between 6 October 1959 and 12 December 2000. Each dot is a new record.

When Yale 1 NNW set new all-time records
Date	Kind	Detail
1959-10-06	Record daily precipitation	Record daily precipitation 90.4 mm (3.6 in)
1967-01-27	Record daily snowfall	Record daily snowfall 35.6 cm (14.0 in)
1985-02-12	Record snow depth	Record snow depth 63.5 cm (25.0 in)
1985-02-13	Record snow depth	Record snow depth 73.7 cm (29.0 in)
1985-02-14	Record snow depth	Record snow depth 76.2 cm (30.0 in)
1986-09-11	Record daily precipitation	Record daily precipitation 109.7 mm (4.3 in)
2000-12-12	Record daily snowfall	Record daily snowfall 44.5 cm (17.5 in)

Wettest Day of Each Month

Sep: 109.7 mm (4.3 in)

The wettest day on record for each calendar month at Yale 1 NNW. The most was 109.7 mm (4.3 in) on 11 September 1986.

Record daily precipitation for each month at Yale 1 NNW
Month	Record daily precipitation (mm)	Date
Jan	44.2 mm (1.7 in)	30 January 2013
Feb	76.2 mm (3.0 in)	16 February 1954
Mar	47.0 mm (1.9 in)	3 March 1976
Apr	76.2 mm (3.0 in)	19 April 1975
May	90.2 mm (3.6 in)	11 May 1943
Jun	88.9 mm (3.5 in)	24 June 1994
Jul	68.8 mm (2.7 in)	29 July 1999
Aug	89.9 mm (3.5 in)	12 August 2014
Sep	109.7 mm (4.3 in)	11 September 1986
Oct	90.4 mm (3.6 in)	6 October 1959
Nov	61.7 mm (2.4 in)	22 November 1929
Dec	50.8 mm (2.0 in)	24 December 1931

Period of Record Coverage

2007 to 2020

14 years of record at Yale 1 NNW, 2007 to 2020. 1 years have data for under 90 percent of days and are left out of rankings: 2019.

Days with data per year at Yale 1 NNW
Year	Days with data	Share of year	Complete
2007	359	98%	Yes
2008	351	96%	Yes
2009	356	98%	Yes
2010	343	94%	Yes
2011	353	97%	Yes
2012	337	92%	Yes
2013	347	95%	Yes
2014	346	95%	Yes
2015	338	93%	Yes
2016	339	93%	Yes
2017	332	91%	Yes
2018	336	92%	Yes
2019	308	84%	No
2020	342	93%	Yes

Latest Records

Latest records at Yale 1 NNW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 November 2020	Yale 1 NNW, US	daily snowfall	5.1 cm (2.0 in)	1.3 cm (0.5 in)	49 years	26 of 100 (Routine)
4 August 2020	Yale 1 NNW, US	daily rain	61.5 mm (2.4 in)	28.0 mm (1.1 in)	67 years	54 of 100 (Notable)
11 June 2020	Yale 1 NNW, US	daily rain	43.7 mm (1.7 in)	18.3 mm (0.7 in)	12 years	28 of 100 (Routine)
18 April 2020	Yale 1 NNW, US	daily snowfall	0.5 cm (0.2 in)	0.5 cm (0.2 in)	93 years	20 of 100 (Routine)
12 January 2020	Yale 1 NNW, US	daily rain	29.0 mm (1.1 in)	12.5 mm (0.5 in)	88 years	56 of 100 (Notable)
11 January 2020	Yale 1 NNW, US	daily rain	40.1 mm (1.6 in)	22.3 mm (0.9 in)	88 years	74 of 100 (Major)
18 November 2019	Yale 1 NNW, US	daily snow depth (Tie)	5.1 cm (2.0 in)	tie	86 years	8 of 100 (Routine)
17 November 2019	Yale 1 NNW, US	daily snow depth	7.6 cm (3.0 in)	2.5 cm (1.0 in)	86 years	20 of 100 (Routine)
14 November 2019	Yale 1 NNW, US	daily snow depth	15.2 cm (6.0 in)	7.6 cm (3.0 in)	44 years	44 of 100 (Notable)
13 November 2019	Yale 1 NNW, US	daily snow depth	15.2 cm (6.0 in)	10.1 cm (4.0 in)	85 years	63 of 100 (Major)
12 November 2019	Yale 1 NNW, US	daily snowfall	19.8 cm (7.8 in)	18.5 cm (7.3 in)	50 years	64 of 100 (Major)
12 November 2019	Yale 1 NNW, US	monthly snow depth (Tie)	20.3 cm (8.0 in)	tie	3 years	5 of 100 (Routine)
31 October 2019	Yale 1 NNW, US	daily rain	18.3 mm (0.7 in)	1.5 mm (0.06 in)	9 years	12 of 100 (Routine)
2 October 2019	Yale 1 NNW, US	daily rain	45.2 mm (1.8 in)	12.4 mm (0.5 in)	30 years	31 of 100 (Routine)
12 September 2019	Yale 1 NNW, US	daily rain	62.0 mm (2.4 in)	46.0 mm (1.8 in)	80 years	73 of 100 (Major)
25 May 2019	Yale 1 NNW, US	daily rain	63.8 mm (2.5 in)	17.8 mm (0.7 in)	28 years	36 of 100 (Notable)
26 April 2019	Yale 1 NNW, US	daily rain	31.8 mm (1.3 in)	0.6 mm (0.02 in)	73 years	31 of 100 (Routine)
29 January 2019	Yale 1 NNW, US	daily snowfall	15.5 cm (6.1 in)	5.8 cm (2.3 in)	72 years	42 of 100 (Notable)
13 November 2018	Yale 1 NNW, US	daily snowfall	3.8 cm (1.5 in)	2.5 cm (1.0 in)	75 years	20 of 100 (Routine)
10 November 2018	Yale 1 NNW, US	daily snowfall	3.8 cm (1.5 in)	2.0 cm (0.8 in)	75 years	20 of 100 (Routine)

Climate Trend

13 complete years, 2007 to 2020

One stripe for each of 13 complete years at Yale 1 NNW, 2007 to 2020. Blue stripes are years cooler than the station's own mean of 7.9 C (46.3 F); red stripes are warmer. The coolest year was 2014, at 6.2 C (43.2 F), and the warmest was 2012, at 9.4 C (49.0 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Yale 1 NNW as warming stripes, 2007 to 2020
Year	Annual mean temperature	Difference from the station mean
2007	7.9 C	-0.02 C
2008	7.4 C	-0.55 C
2009	7.3 C	-0.65 C
2010	8.7 C	+0.78 C
2011	8.0 C	+0.03 C
2012	9.4 C	+1.51 C
2013	7.4 C	-0.57 C
2014	6.2 C	-1.73 C
2015	7.5 C	-0.45 C
2016	9.0 C	+1.10 C
2017	8.5 C	+0.55 C
2018	7.4 C	-0.53 C
2020	8.5 C	+0.53 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

1926 to 2020

Yearly extremes at Yale 1 NNW: 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)	2012	34.2 C (93.5 F)	14
Coldest night (TNn)	-31.7 C (-25.1 F)	2015	-25.0 C (-13.0 F)	14
Wettest day (Rx1day)	109.7 mm (4.3 in)	1986	47.5 mm (1.9 in)	95
Wettest five days (Rx5day)	147.5 mm (5.8 in)	1986	72.4 mm (2.9 in)	95
Longest dry spell (CDD)	48 days	1969	18 days	95

Hottest day (TXx)

The hottest day of the year at Yale 1 NNW, 1926 to 2020. The record is 37.8 C (100.0 F) in 2012, marked on the chart; the median year is 34.2 C (93.5 F).

Hottest day (TXx) at Yale 1 NNW by year
Year	Hottest day (TXx)
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
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	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	35.0 C (95.0 F)
2008	32.8 C (91.0 F)
2009	32.8 C (91.0 F)
2010	35.0 C (95.0 F)
2011	37.2 C (99.0 F)
2012	37.8 C (100.0 F)
2013	35.0 C (95.0 F)
2014	32.2 C (90.0 F)
2015	33.9 C (93.0 F)
2016	33.9 C (93.0 F)
2017	33.9 C (93.0 F)
2018	33.9 C (93.0 F)
2019	34.4 C (93.9 F)
2020	34.4 C (93.9 F)

Coldest night (TNn)

The coldest night of the year at Yale 1 NNW, 1926 to 2020. The record is -31.7 C (-25.1 F) in 2015, marked on the chart; the median year is -25.0 C (-13.0 F).

Coldest night (TNn) at Yale 1 NNW by year
Year	Coldest night (TNn)
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
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	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	-22.2 C (-8.0 F)
2008	-20.6 C (-5.1 F)
2009	-25.6 C (-14.1 F)
2010	-18.3 C (-0.9 F)
2011	-24.4 C (-11.9 F)
2012	-17.8 C (0.0 F)
2013	-20.6 C (-5.1 F)
2014	-28.3 C (-18.9 F)
2015	-31.7 C (-25.1 F)
2016	-25.6 C (-14.1 F)
2017	-26.1 C (-15.0 F)
2018	-26.1 C (-15.0 F)
2019	-27.8 C (-18.0 F)
2020	-14.4 C (6.1 F)

Wettest day (Rx1day)

The wettest day of the year at Yale 1 NNW, 1926 to 2020. The record is 109.7 mm (4.3 in) in 1986, marked on the chart; the median year is 47.5 mm (1.9 in).

Wettest day (Rx1day) at Yale 1 NNW by year
Year	Wettest day (Rx1day)
1926	25.9 mm (1.0 in)
1927	59.7 mm (2.4 in)
1928	86.9 mm (3.4 in)
1929	61.7 mm (2.4 in)
1930	33.0 mm (1.3 in)
1931	50.8 mm (2.0 in)
1932	64.3 mm (2.5 in)
1933	35.3 mm (1.4 in)
1934	48.5 mm (1.9 in)
1935	53.3 mm (2.1 in)
1936	37.6 mm (1.5 in)
1937	49.0 mm (1.9 in)
1938	59.9 mm (2.4 in)
1939	39.6 mm (1.6 in)
1940	33.5 mm (1.3 in)
1941	46.5 mm (1.8 in)
1942	54.4 mm (2.1 in)
1943	90.2 mm (3.6 in)
1944	35.1 mm (1.4 in)
1945	65.3 mm (2.6 in)
1946	39.1 mm (1.5 in)
1947	50.8 mm (2.0 in)
1948	38.1 mm (1.5 in)
1949	63.0 mm (2.5 in)
1950	38.1 mm (1.5 in)
1951	48.3 mm (1.9 in)
1952	62.2 mm (2.4 in)
1953	47.5 mm (1.9 in)
1954	76.2 mm (3.0 in)
1955	35.6 mm (1.4 in)
1956	43.2 mm (1.7 in)
1957	37.1 mm (1.5 in)
1958	38.9 mm (1.5 in)
1959	90.4 mm (3.6 in)
1960	51.6 mm (2.0 in)
1961	56.6 mm (2.2 in)
1962	36.6 mm (1.4 in)
1963	31.0 mm (1.2 in)
1964	40.6 mm (1.6 in)
1965	35.1 mm (1.4 in)
1966	38.1 mm (1.5 in)
1967	61.0 mm (2.4 in)
1968	37.3 mm (1.5 in)
1969	38.1 mm (1.5 in)
1970	74.2 mm (2.9 in)
1971	39.4 mm (1.6 in)
1972	38.1 mm (1.5 in)
1973	45.5 mm (1.8 in)
1974	30.5 mm (1.2 in)
1975	76.2 mm (3.0 in)
1976	47.5 mm (1.9 in)
1977	59.7 mm (2.4 in)
1978	14.0 mm (0.6 in)
1979	51.1 mm (2.0 in)
1980	51.3 mm (2.0 in)
1981	67.3 mm (2.6 in)
1982	24.4 mm (1.0 in)
1983	43.2 mm (1.7 in)
1984	76.2 mm (3.0 in)
1985	63.5 mm (2.5 in)
1986	109.7 mm (4.3 in)
1987	47.0 mm (1.9 in)
1988	35.1 mm (1.4 in)
1989	43.2 mm (1.7 in)
1990	41.1 mm (1.6 in)
1991	46.0 mm (1.8 in)
1992	41.9 mm (1.6 in)
1993	32.5 mm (1.3 in)
1994	88.9 mm (3.5 in)
1995	35.8 mm (1.4 in)
1996	70.1 mm (2.8 in)
1997	50.8 mm (2.0 in)
1998	30.7 mm (1.2 in)
1999	68.8 mm (2.7 in)
2000	49.0 mm (1.9 in)
2001	58.9 mm (2.3 in)
2002	36.8 mm (1.4 in)
2003	37.8 mm (1.5 in)
2004	46.2 mm (1.8 in)
2005	40.9 mm (1.6 in)
2006	85.6 mm (3.4 in)
2007	84.6 mm (3.3 in)
2008	56.9 mm (2.2 in)
2009	52.8 mm (2.1 in)
2010	50.5 mm (2.0 in)
2011	45.2 mm (1.8 in)
2012	48.0 mm (1.9 in)
2013	58.4 mm (2.3 in)
2014	89.9 mm (3.5 in)
2015	69.1 mm (2.7 in)
2016	32.5 mm (1.3 in)
2017	33.5 mm (1.3 in)
2018	38.4 mm (1.5 in)
2019	63.8 mm (2.5 in)
2020	61.5 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Yale 1 NNW, 1926 to 2020. The record is 147.5 mm (5.8 in) in 1986, marked on the chart; the median year is 72.4 mm (2.9 in).

Wettest five days (Rx5day) at Yale 1 NNW by year
Year	Wettest five days (Rx5day)
1926	34.6 mm (1.4 in)
1927	101.1 mm (4.0 in)
1928	119.1 mm (4.7 in)
1929	134.3 mm (5.3 in)
1930	33.0 mm (1.3 in)
1931	55.9 mm (2.2 in)
1932	80.0 mm (3.1 in)
1933	72.9 mm (2.9 in)
1934	61.2 mm (2.4 in)
1935	63.2 mm (2.5 in)
1936	69.1 mm (2.7 in)
1937	77.4 mm (3.0 in)
1938	59.9 mm (2.4 in)
1939	43.4 mm (1.7 in)
1940	51.5 mm (2.0 in)
1941	75.5 mm (3.0 in)
1942	70.4 mm (2.8 in)
1943	108.2 mm (4.3 in)
1944	44.0 mm (1.7 in)
1945	100.9 mm (4.0 in)
1946	56.1 mm (2.2 in)
1947	57.2 mm (2.3 in)
1948	79.8 mm (3.1 in)
1949	113.8 mm (4.5 in)
1950	64.8 mm (2.6 in)
1951	66.1 mm (2.6 in)
1952	88.9 mm (3.5 in)
1953	76.5 mm (3.0 in)
1954	93.9 mm (3.7 in)
1955	39.7 mm (1.6 in)
1956	85.1 mm (3.4 in)
1957	65.6 mm (2.6 in)
1958	39.9 mm (1.6 in)
1959	120.2 mm (4.7 in)
1960	69.5 mm (2.7 in)
1961	66.2 mm (2.6 in)
1962	77.0 mm (3.0 in)
1963	38.1 mm (1.5 in)
1964	43.1 mm (1.7 in)
1965	42.4 mm (1.7 in)
1966	59.1 mm (2.3 in)
1967	108.0 mm (4.3 in)
1968	76.6 mm (3.0 in)
1969	60.9 mm (2.4 in)
1970	78.8 mm (3.1 in)
1971	55.4 mm (2.2 in)
1972	73.4 mm (2.9 in)
1973	94.2 mm (3.7 in)
1974	63.5 mm (2.5 in)
1975	82.6 mm (3.3 in)
1976	92.8 mm (3.7 in)
1977	106.7 mm (4.2 in)
1978	24.7 mm (1.0 in)
1979	101.7 mm (4.0 in)
1980	61.0 mm (2.4 in)
1981	85.9 mm (3.4 in)
1982	38.7 mm (1.5 in)
1983	60.7 mm (2.4 in)
1984	96.5 mm (3.8 in)
1985	76.5 mm (3.0 in)
1986	147.5 mm (5.8 in)
1987	57.7 mm (2.3 in)
1988	44.9 mm (1.8 in)
1989	56.9 mm (2.2 in)
1990	82.3 mm (3.2 in)
1991	95.8 mm (3.8 in)
1992	64.3 mm (2.5 in)
1993	75.7 mm (3.0 in)
1994	105.9 mm (4.2 in)
1995	60.7 mm (2.4 in)
1996	136.7 mm (5.4 in)
1997	71.9 mm (2.8 in)
1998	67.7 mm (2.7 in)
1999	86.1 mm (3.4 in)
2000	82.4 mm (3.2 in)
2001	90.6 mm (3.6 in)
2002	57.3 mm (2.3 in)
2003	75.7 mm (3.0 in)
2004	84.1 mm (3.3 in)
2005	51.0 mm (2.0 in)
2006	109.7 mm (4.3 in)
2007	91.7 mm (3.6 in)
2008	101.6 mm (4.0 in)
2009	71.2 mm (2.8 in)
2010	69.5 mm (2.7 in)
2011	67.2 mm (2.6 in)
2012	67.3 mm (2.6 in)
2013	118.8 mm (4.7 in)
2014	125.0 mm (4.9 in)
2015	72.4 mm (2.9 in)
2016	80.5 mm (3.2 in)
2017	50.0 mm (2.0 in)
2018	60.5 mm (2.4 in)
2019	71.9 mm (2.8 in)
2020	87.7 mm (3.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Yale 1 NNW, 1926 to 2020. The record is 48 days in 1969, marked on the chart; the median year is 18 days.

Longest dry spell (CDD) at Yale 1 NNW by year
Year	Longest dry spell (CDD)
1926	8 days
1927	14 days
1928	14 days
1929	14 days
1930	19 days
1931	17 days
1932	19 days
1933	22 days
1934	27 days
1935	15 days
1936	22 days
1937	15 days
1938	23 days
1939	26 days
1940	9 days
1941	17 days
1942	21 days
1943	25 days
1944	24 days
1945	15 days
1946	18 days
1947	18 days
1948	24 days
1949	21 days
1950	15 days
1951	18 days
1952	19 days
1953	17 days
1954	21 days
1955	16 days
1956	19 days
1957	23 days
1958	20 days
1959	12 days
1960	16 days
1961	21 days
1962	25 days
1963	16 days
1964	17 days
1965	16 days
1966	22 days
1967	21 days
1968	25 days
1969	48 days
1970	15 days
1971	25 days
1972	20 days
1973	27 days
1974	15 days
1975	15 days
1976	25 days
1977	20 days
1978	11 days
1979	31 days
1980	28 days
1981	19 days
1982	16 days
1983	16 days
1984	14 days
1985	13 days
1986	17 days
1987	14 days
1988	22 days
1989	22 days
1990	16 days
1991	23 days
1992	18 days
1993	20 days
1994	24 days
1995	24 days
1996	18 days
1997	13 days
1998	19 days
1999	28 days
2000	18 days
2001	23 days
2002	19 days
2003	15 days
2004	23 days
2005	31 days
2006	17 days
2007	17 days
2008	14 days
2009	21 days
2010	14 days
2011	17 days
2012	11 days
2013	16 days
2014	14 days
2015	17 days
2016	14 days
2017	11 days
2018	9 days
2019	9 days
2020	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.

Rainfall Return Levels

80 years, 1931 to 2020

A day with at least 48.1 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 115.6 mm (4.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Yale 1 NNW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	48.1 mm (1.9 in)
5 years	63.3 mm (2.5 in)
10 years	74.4 mm (2.9 in)
25 years	89.8 mm (3.5 in)
50 years	102.2 mm (4.0 in)
100 years	115.6 mm (4.6 in)	Longer than the 80 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, 80 years of values from 1931 to 2020.

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: 109.7 mm (4.3 in) in 1986; 90.4 mm (3.6 in) in 1959; 90.2 mm (3.6 in) in 1943.

Download the Data

Data for Yale 1 NNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Yale 1 NNW 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.

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