Delavan Weather Records (USC00472050)

Record envelope, standing records and threshold days for Delavan (USC00472050), Wisconsin, United States, with 30 years of record.

Key Facts for Delavan

Delavan (USC00472050) is a weather station in Wisconsin, United States at 42.63 latitude and -88.32 longitude, 280 m (920 ft) above sea level.
The station reports from 1893 to 1922, 30 years of record.
1,464 records set at Delavan still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Wisconsin, United States, 42.63 latitude, -88.32 longitude.
Elevation: 280 m (920 ft).
Period of record: 1893 to 1922, 30 years.
Eligible elements: none yet.

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 Delavan. 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 Delavan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.0 C (59.0 F)	-32.2 C (-26.0 F)	n/a	n/a
Feb	16.7 C (62.1 F)	-33.9 C (-29.0 F)	n/a	n/a
Mar	30.6 C (87.1 F)	-24.4 C (-11.9 F)	n/a	n/a
Apr	31.1 C (88.0 F)	-11.1 C (12.0 F)	n/a	n/a
May	33.9 C (93.0 F)	-5.6 C (21.9 F)	n/a	n/a
Jun	37.2 C (99.0 F)	-0.6 C (30.9 F)	n/a	n/a
Jul	39.4 C (102.9 F)	5.0 C (41.0 F)	n/a	n/a
Aug	38.3 C (100.9 F)	1.1 C (34.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	-3.9 C (25.0 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-15.0 C (5.0 F)	n/a	n/a
Nov	25.0 C (77.0 F)	-22.8 C (-9.0 F)	n/a	n/a
Dec	16.7 C (62.1 F)	-32.8 C (-27.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Delavan still stand. 1895 holds the most, with 95.

Standing records at Delavan by the year they were set
Year set	Standing records
1893	67
1894	74
1895	95
1896	91
1897	79
1898	50
1899	57
1900	54
1901	17
1902	34
1903	25
1907	15
1908	58
1909	52
1910	63
1911	64
1912	72
1913	64
1914	48
1915	56
1916	55
1917	58
1918	58
1919	34
1920	57
1921	52
1922	15

Wettest Day of Each Month

Aug: 150.4 mm (5.9 in)

The wettest day on record for each calendar month at Delavan. The most was 150.4 mm (5.9 in) on 14 August 1909.

Record daily precipitation for each month at Delavan
Month	Record daily precipitation (mm)	Date
Jan	35.1 mm (1.4 in)	3 January 1897
Feb	23.1 mm (0.9 in)	21 February 1913
Mar	51.3 mm (2.0 in)	7 March 1903
Apr	67.8 mm (2.7 in)	29 April 1909
May	52.3 mm (2.1 in)	26 May 1909
Jun	109.2 mm (4.3 in)	24 June 1898
Jul	128.8 mm (5.1 in)	26 July 1896
Aug	150.4 mm (5.9 in)	14 August 1909
Sep	85.6 mm (3.4 in)	13 September 1915
Oct	66.0 mm (2.6 in)	31 October 1919
Nov	49.5 mm (1.9 in)	13 November 1899
Dec	40.4 mm (1.6 in)	2 December 1912

Period of Record Coverage

1893 to 1922

27 years of record at Delavan, 1893 to 1922. 7 years have data for under 90 percent of days and are left out of rankings: 1899, 1901, 1902, 1903, 1907, 1909, 1922.

Days with data per year at Delavan
Year	Days with data	Share of year	Complete
1893	331	91%	Yes
1894	352	96%	Yes
1895	357	98%	Yes
1896	362	99%	Yes
1897	351	96%	Yes
1898	361	99%	Yes
1899	299	82%	No
1900	352	96%	Yes
1901	98	27%	No
1902	242	66%	No
1903	227	62%	No
1907	146	40%	No
1908	366	100%	Yes
1909	287	79%	No
1910	347	95%	Yes
1911	357	98%	Yes
1912	363	99%	Yes
1913	360	99%	Yes
1914	350	96%	Yes
1915	363	99%	Yes
1916	361	99%	Yes
1917	361	99%	Yes
1918	365	100%	Yes
1919	365	100%	Yes
1920	366	100%	Yes
1921	362	99%	Yes
1922	181	50%	No

Latest Records

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

Climate Trend

19 complete years, 1893 to 1921

One stripe for each of 19 complete years at Delavan, 1893 to 1921. Blue stripes are years cooler than the station's own mean of 8.1 C (46.5 F); red stripes are warmer. The coolest year was 1917, at 5.9 C (42.6 F), and the warmest was 1921, at 10.2 C (50.3 F). The strongest colour marks a difference of 2.2 C (4.0 F).

Annual mean temperature at Delavan as warming stripes, 1893 to 1921
Year	Annual mean temperature	Difference from the station mean
1893	7.6 C	-0.48 C
1894	8.8 C	+0.77 C
1895	7.1 C	-1.00 C
1897	8.1 C	+0.03 C
1898	7.9 C	-0.19 C
1900	8.9 C	+0.88 C
1908	8.8 C	+0.69 C
1910	8.1 C	+0.05 C
1911	8.9 C	+0.87 C
1912	6.8 C	-1.28 C
1913	8.7 C	+0.61 C
1914	8.2 C	+0.16 C
1915	7.6 C	-0.43 C
1916	7.6 C	-0.50 C
1917	5.9 C	-2.17 C
1918	8.0 C	-0.10 C
1919	8.3 C	+0.27 C
1920	7.8 C	-0.24 C
1921	10.2 C	+2.13 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

1893 to 1922

Yearly extremes at Delavan: 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)	1916	36.1 C (97.0 F)	27
Coldest night (TNn)	-33.9 C (-29.0 F)	1918	-27.2 C (-17.0 F)	27
Wettest day (Rx1day)	150.4 mm (5.9 in)	1909	58.7 mm (2.3 in)	27
Wettest five days (Rx5day)	189.0 mm (7.4 in)	1909	84.1 mm (3.3 in)	27
Longest dry spell (CDD)	32 days	1893	20 days	27

Hottest day (TXx)

The hottest day of the year at Delavan, 1893 to 1922. The record is 39.4 C (102.9 F) in 1916, marked on the chart; the median year is 36.1 C (97.0 F).

Hottest day (TXx) at Delavan by year
Year	Hottest day (TXx)
1893	36.1 C (97.0 F)
1894	38.3 C (100.9 F)
1895	36.1 C (97.0 F)
1896	35.6 C (96.1 F)
1897	36.1 C (97.0 F)
1898	33.9 C (93.0 F)
1899	36.1 C (97.0 F)
1900	37.2 C (99.0 F)
1901	18.3 C (64.9 F)
1902	32.2 C (90.0 F)
1903	33.9 C (93.0 F)
1907	33.9 C (93.0 F)
1908	35.0 C (95.0 F)
1909	36.7 C (98.1 F)
1910	36.7 C (98.1 F)
1911	38.9 C (102.0 F)
1912	35.0 C (95.0 F)
1913	37.2 C (99.0 F)
1914	35.0 C (95.0 F)
1915	30.6 C (87.1 F)
1916	39.4 C (102.9 F)
1917	36.1 C (97.0 F)
1918	38.3 C (100.9 F)
1919	36.7 C (98.1 F)
1920	34.4 C (93.9 F)
1921	37.8 C (100.0 F)
1922	34.4 C (93.9 F)

Coldest night (TNn)

The coldest night of the year at Delavan, 1893 to 1922. The record is -33.9 C (-29.0 F) in 1918, marked on the chart; the median year is -27.2 C (-17.0 F).

Coldest night (TNn) at Delavan by year
Year	Coldest night (TNn)
1893	-31.1 C (-24.0 F)
1894	-30.6 C (-23.1 F)
1895	-32.2 C (-26.0 F)
1896	-26.1 C (-15.0 F)
1897	-32.2 C (-26.0 F)
1898	-25.0 C (-13.0 F)
1899	-22.2 C (-8.0 F)
1900	-25.0 C (-13.0 F)
1901	-26.1 C (-15.0 F)
1902	-26.7 C (-16.1 F)
1903	-26.1 C (-15.0 F)
1907	-17.2 C (1.0 F)
1908	-24.4 C (-11.9 F)
1909	-27.2 C (-17.0 F)
1910	-31.1 C (-24.0 F)
1911	-22.2 C (-8.0 F)
1912	-31.7 C (-25.1 F)
1913	-23.9 C (-11.0 F)
1914	-32.8 C (-27.0 F)
1915	-31.7 C (-25.1 F)
1916	-27.2 C (-17.0 F)
1917	-28.9 C (-20.0 F)
1918	-33.9 C (-29.0 F)
1919	-31.7 C (-25.1 F)
1920	-28.3 C (-18.9 F)
1921	-21.1 C (-6.0 F)
1922	-25.0 C (-13.0 F)

Wettest day (Rx1day)

The wettest day of the year at Delavan, 1893 to 1922. The record is 150.4 mm (5.9 in) in 1909, marked on the chart; the median year is 58.7 mm (2.3 in).

Wettest day (Rx1day) at Delavan by year
Year	Wettest day (Rx1day)
1893	52.8 mm (2.1 in)
1894	66.0 mm (2.6 in)
1895	82.6 mm (3.3 in)
1896	128.8 mm (5.1 in)
1897	36.8 mm (1.4 in)
1898	109.2 mm (4.3 in)
1899	49.5 mm (1.9 in)
1900	31.8 mm (1.3 in)
1901	30.5 mm (1.2 in)
1902	63.8 mm (2.5 in)
1903	57.9 mm (2.3 in)
1907	43.9 mm (1.7 in)
1908	34.0 mm (1.3 in)
1909	150.4 mm (5.9 in)
1910	48.8 mm (1.9 in)
1911	72.4 mm (2.9 in)
1912	94.0 mm (3.7 in)
1913	37.8 mm (1.5 in)
1914	62.2 mm (2.4 in)
1915	85.6 mm (3.4 in)
1916	79.8 mm (3.1 in)
1917	49.8 mm (2.0 in)
1918	44.5 mm (1.8 in)
1919	66.0 mm (2.6 in)
1920	68.6 mm (2.7 in)
1921	58.7 mm (2.3 in)
1922	34.5 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Delavan, 1893 to 1922. The record is 189.0 mm (7.4 in) in 1909, marked on the chart; the median year is 84.1 mm (3.3 in).

Wettest five days (Rx5day) at Delavan by year
Year	Wettest five days (Rx5day)
1893	99.1 mm (3.9 in)
1894	90.9 mm (3.6 in)
1895	82.6 mm (3.3 in)
1896	149.6 mm (5.9 in)
1897	55.4 mm (2.2 in)
1898	124.5 mm (4.9 in)
1899	88.4 mm (3.5 in)
1900	52.3 mm (2.1 in)
1901	38.1 mm (1.5 in)
1902	131.1 mm (5.2 in)
1903	89.2 mm (3.5 in)
1907	60.0 mm (2.4 in)
1908	58.9 mm (2.3 in)
1909	189.0 mm (7.4 in)
1910	67.3 mm (2.6 in)
1911	103.7 mm (4.1 in)
1912	95.3 mm (3.8 in)
1913	79.7 mm (3.1 in)
1914	81.0 mm (3.2 in)
1915	105.4 mm (4.1 in)
1916	94.3 mm (3.7 in)
1917	62.5 mm (2.5 in)
1918	64.5 mm (2.5 in)
1919	110.3 mm (4.3 in)
1920	84.1 mm (3.3 in)
1921	84.1 mm (3.3 in)
1922	48.5 mm (1.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Delavan, 1893 to 1922. The record is 32 days in 1893, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Delavan by year
Year	Longest dry spell (CDD)
1893	32 days
1894	24 days
1895	30 days
1896	16 days
1897	20 days
1898	17 days
1899	19 days
1900	25 days
1901	20 days
1902	22 days
1903	17 days
1907	18 days
1908	25 days
1909	16 days
1910	31 days
1911	12 days
1912	14 days
1913	25 days
1914	22 days
1915	24 days
1916	23 days
1917	20 days
1918	23 days
1919	32 days
1920	20 days
1921	16 days
1922	17 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 Delavan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Delavan 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).