Cornish Weather Records (USC00171670)

Record envelope, standing records and threshold days for Cornish (USC00171670), Maine, United States, with 33 years of record.

Key Facts for Cornish

Cornish (USC00171670) is a weather station in Maine, United States at 43.80 latitude and -70.80 longitude, 239 m (784 ft) above sea level.
The station reports from 1892 to 1924, 33 years of record.
1,464 records set at Cornish still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Cornish set a daily record precipitation of 34.0 mm (1.3 in) on 17 July 1924.

About the Station

Location: Maine, United States, 43.80 latitude, -70.80 longitude.
Elevation: 239 m (784 ft).
Period of record: 1892 to 1924, 33 years.
Eligible elements: prcp.

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 Cornish. 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 Cornish, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	17.8 C (64.0 F)	-35.0 C (-31.0 F)	n/a	n/a
Feb	16.1 C (61.0 F)	-35.6 C (-32.1 F)	n/a	n/a
Mar	26.1 C (79.0 F)	-30.6 C (-23.1 F)	n/a	n/a
Apr	31.7 C (89.1 F)	-17.8 C (0.0 F)	n/a	n/a
May	37.8 C (100.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	37.2 C (99.0 F)	-1.7 C (28.9 F)	n/a	n/a
Jul	39.4 C (102.9 F)	5.0 C (41.0 F)	n/a	n/a
Aug	37.8 C (100.0 F)	2.2 C (36.0 F)	n/a	n/a
Sep	35.6 C (96.1 F)	-3.9 C (25.0 F)	n/a	n/a
Oct	30.0 C (86.0 F)	-8.9 C (16.0 F)	n/a	n/a
Nov	23.9 C (75.0 F)	-20.0 C (-4.0 F)	n/a	n/a
Dec	18.3 C (64.9 F)	-37.8 C (-36.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Cornish still stand. 1903 holds the most, with 84.

Standing records at Cornish by the year they were set
Year set	Standing records
1894	18
1901	65
1902	52
1903	84
1904	56
1905	52
1906	58
1907	63
1908	69
1909	55
1910	59
1911	84
1912	57
1913	77
1914	77
1915	59
1916	67
1917	64
1918	65
1919	47
1920	47
1921	59
1922	42
1923	67
1924	21

Wettest Day of Each Month

Aug: 134.4 mm (5.3 in)

The wettest day on record for each calendar month at Cornish. The most was 134.4 mm (5.3 in) on 7 August 1901.

Record daily precipitation for each month at Cornish
Month	Record daily precipitation (mm)	Date
Jan	67.1 mm (2.6 in)	22 January 1902
Feb	63.2 mm (2.5 in)	13 February 1900
Mar	91.2 mm (3.6 in)	1 March 1896
Apr	102.1 mm (4.0 in)	7 April 1901
May	102.6 mm (4.0 in)	17 May 1916
Jun	121.9 mm (4.8 in)	18 June 1922
Jul	113.5 mm (4.5 in)	31 July 1905
Aug	134.4 mm (5.3 in)	7 August 1901
Sep	78.7 mm (3.1 in)	30 September 1920
Oct	83.8 mm (3.3 in)	24 October 1893
Nov	72.4 mm (2.9 in)	24 November 1923
Dec	70.9 mm (2.8 in)	14 December 1920

Period of Record Coverage

1894 to 1924

25 years of record at Cornish, 1894 to 1924. 3 years have data for under 90 percent of days and are left out of rankings: 1894, 1918, 1924.

Days with data per year at Cornish
Year	Days with data	Share of year	Complete
1894	25	7%	No
1901	357	98%	Yes
1902	363	99%	Yes
1903	364	100%	Yes
1904	366	100%	Yes
1905	365	100%	Yes
1906	365	100%	Yes
1907	364	100%	Yes
1908	366	100%	Yes
1909	365	100%	Yes
1910	365	100%	Yes
1911	364	100%	Yes
1912	366	100%	Yes
1913	365	100%	Yes
1914	364	100%	Yes
1915	365	100%	Yes
1916	366	100%	Yes
1917	364	100%	Yes
1918	290	79%	No
1919	345	95%	Yes
1920	364	99%	Yes
1921	363	99%	Yes
1922	364	100%	Yes
1923	363	99%	Yes
1924	209	57%	No

Latest Records

Latest records at Cornish
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 July 1924	Cornish, US	daily rain	34.0 mm (1.3 in)	24.3 mm (1.0 in)	15 years	23 of 100 (Routine)
12 May 1924	Cornish, US	daily rain	28.7 mm (1.1 in)	16.5 mm (0.6 in)	26 years	24 of 100 (Routine)
1 May 1924	Cornish, US	daily rain	47.0 mm (1.9 in)	22.9 mm (0.9 in)	6 years	22 of 100 (Routine)
19 April 1924	Cornish, US	daily rain	42.4 mm (1.7 in)	33.3 mm (1.3 in)	14 years	32 of 100 (Routine)
2 April 1924	Cornish, US	daily rain	19.1 mm (0.8 in)	1.1 mm (0.04 in)	4 years	4 of 100 (Routine)

Climate Trend

22 complete years, 1901 to 1923

One stripe for each of 22 complete years at Cornish, 1901 to 1923. Blue stripes are years cooler than the station's own mean of 7.3 C (45.1 F); red stripes are warmer. The coolest year was 1904, at 5.6 C (42.0 F), and the warmest was 1913, at 9.0 C (48.1 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Cornish as warming stripes, 1901 to 1923
Year	Annual mean temperature	Difference from the station mean
1901	7.0 C	-0.21 C
1902	7.2 C	-0.04 C
1903	7.2 C	-0.01 C
1904	5.6 C	-1.68 C
1905	6.3 C	-0.96 C
1906	7.1 C	-0.13 C
1907	5.9 C	-1.37 C
1908	7.5 C	+0.25 C
1909	7.2 C	-0.05 C
1910	7.7 C	+0.43 C
1911	7.9 C	+0.61 C
1912	7.5 C	+0.27 C
1913	9.0 C	+1.70 C
1914	7.1 C	-0.17 C
1915	8.4 C	+1.18 C
1916	7.4 C	+0.19 C
1917	6.3 C	-0.97 C
1919	7.2 C	-0.06 C
1920	7.1 C	-0.15 C
1921	8.6 C	+1.36 C
1922	7.6 C	+0.33 C
1923	6.7 C	-0.51 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

1892 to 1924

Yearly extremes at Cornish: 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)	1911	35.0 C (95.0 F)	25
Coldest night (TNn)	-37.8 C (-36.0 F)	1917	-29.1 C (-20.5 F)	24
Wettest day (Rx1day)	134.4 mm (5.3 in)	1901	69.9 mm (2.8 in)	33
Wettest five days (Rx5day)	203.4 mm (8.0 in)	1896	93.8 mm (3.7 in)	33
Longest dry spell (CDD)	25 days	1903	16 days	33

Hottest day (TXx)

The hottest day of the year at Cornish, 1892 to 1924. The record is 39.4 C (102.9 F) in 1911, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Cornish by year
Year	Hottest day (TXx)
1892	n/a
1893	n/a
1894	20.0 C (68.0 F)
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	36.1 C (97.0 F)
1902	32.2 C (90.0 F)
1903	35.6 C (96.1 F)
1904	33.9 C (93.0 F)
1905	32.8 C (91.0 F)
1906	35.0 C (95.0 F)
1907	34.4 C (93.9 F)
1908	36.1 C (97.0 F)
1909	34.4 C (93.9 F)
1910	37.2 C (99.0 F)
1911	39.4 C (102.9 F)
1912	38.3 C (100.9 F)
1913	37.8 C (100.0 F)
1914	33.9 C (93.0 F)
1915	33.3 C (91.9 F)
1916	35.6 C (96.1 F)
1917	36.1 C (97.0 F)
1918	34.4 C (93.9 F)
1919	37.2 C (99.0 F)
1920	33.3 C (91.9 F)
1921	35.0 C (95.0 F)
1922	33.3 C (91.9 F)
1923	35.0 C (95.0 F)
1924	32.2 C (90.0 F)

Coldest night (TNn)

The coldest night of the year at Cornish, 1892 to 1924. The record is -37.8 C (-36.0 F) in 1917, marked on the chart; the median year is -29.1 C (-20.5 F).

Coldest night (TNn) at Cornish by year
Year	Coldest night (TNn)
1892	n/a
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	n/a
1898	n/a
1899	n/a
1900	n/a
1901	-25.6 C (-14.1 F)
1902	-27.2 C (-17.0 F)
1903	-25.0 C (-13.0 F)
1904	-27.2 C (-17.0 F)
1905	-25.6 C (-14.1 F)
1906	-22.8 C (-9.0 F)
1907	-29.4 C (-20.9 F)
1908	-26.7 C (-16.1 F)
1909	-28.3 C (-18.9 F)
1910	-31.7 C (-25.1 F)
1911	-28.9 C (-20.0 F)
1912	-33.9 C (-29.0 F)
1913	-28.3 C (-18.9 F)
1914	-35.0 C (-31.0 F)
1915	-30.6 C (-23.1 F)
1916	-27.8 C (-18.0 F)
1917	-37.8 C (-36.0 F)
1918	-34.4 C (-29.9 F)
1919	-30.0 C (-22.0 F)
1920	-34.4 C (-29.9 F)
1921	-26.1 C (-15.0 F)
1922	-35.6 C (-32.1 F)
1923	-33.9 C (-29.0 F)
1924	-33.9 C (-29.0 F)

Wettest day (Rx1day)

The wettest day of the year at Cornish, 1892 to 1924. The record is 134.4 mm (5.3 in) in 1901, marked on the chart; the median year is 69.9 mm (2.8 in).

Wettest day (Rx1day) at Cornish by year
Year	Wettest day (Rx1day)
1892	21.1 mm (0.8 in)
1893	83.8 mm (3.3 in)
1894	63.5 mm (2.5 in)
1895	79.8 mm (3.1 in)
1896	91.2 mm (3.6 in)
1897	100.3 mm (3.9 in)
1898	50.8 mm (2.0 in)
1899	42.7 mm (1.7 in)
1900	69.9 mm (2.8 in)
1901	134.4 mm (5.3 in)
1902	79.8 mm (3.1 in)
1903	68.1 mm (2.7 in)
1904	86.1 mm (3.4 in)
1905	113.5 mm (4.5 in)
1906	69.1 mm (2.7 in)
1907	60.5 mm (2.4 in)
1908	52.3 mm (2.1 in)
1909	64.3 mm (2.5 in)
1910	61.0 mm (2.4 in)
1911	56.4 mm (2.2 in)
1912	55.9 mm (2.2 in)
1913	74.9 mm (2.9 in)
1914	63.5 mm (2.5 in)
1915	87.9 mm (3.5 in)
1916	102.6 mm (4.0 in)
1917	85.3 mm (3.4 in)
1918	67.3 mm (2.6 in)
1919	60.5 mm (2.4 in)
1920	78.7 mm (3.1 in)
1921	30.2 mm (1.2 in)
1922	121.9 mm (4.8 in)
1923	72.4 mm (2.9 in)
1924	73.7 mm (2.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Cornish, 1892 to 1924. The record is 203.4 mm (8.0 in) in 1896, marked on the chart; the median year is 93.8 mm (3.7 in).

Wettest five days (Rx5day) at Cornish by year
Year	Wettest five days (Rx5day)
1892	22.4 mm (0.9 in)
1893	36.5 mm (1.4 in)
1894	100.6 mm (4.0 in)
1895	137.8 mm (5.4 in)
1896	203.4 mm (8.0 in)
1897	100.6 mm (4.0 in)
1898	67.3 mm (2.6 in)
1899	68.9 mm (2.7 in)
1900	108.2 mm (4.3 in)
1901	197.3 mm (7.8 in)
1902	91.3 mm (3.6 in)
1903	123.7 mm (4.9 in)
1904	89.9 mm (3.5 in)
1905	186.1 mm (7.3 in)
1906	100.3 mm (3.9 in)
1907	118.6 mm (4.7 in)
1908	59.7 mm (2.4 in)
1909	87.5 mm (3.4 in)
1910	64.3 mm (2.5 in)
1911	64.3 mm (2.5 in)
1912	89.7 mm (3.5 in)
1913	81.6 mm (3.2 in)
1914	87.9 mm (3.5 in)
1915	120.7 mm (4.8 in)
1916	109.0 mm (4.3 in)
1917	120.1 mm (4.7 in)
1918	96.8 mm (3.8 in)
1919	73.0 mm (2.9 in)
1920	93.8 mm (3.7 in)
1921	43.2 mm (1.7 in)
1922	189.7 mm (7.5 in)
1923	103.3 mm (4.1 in)
1924	83.4 mm (3.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Cornish, 1892 to 1924. The record is 25 days in 1903, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Cornish by year
Year	Longest dry spell (CDD)
1892	12 days
1893	9 days
1894	12 days
1895	16 days
1896	10 days
1897	16 days
1898	8 days
1899	12 days
1900	19 days
1901	18 days
1902	14 days
1903	25 days
1904	17 days
1905	20 days
1906	16 days
1907	12 days
1908	18 days
1909	11 days
1910	16 days
1911	17 days
1912	19 days
1913	18 days
1914	23 days
1915	17 days
1916	15 days
1917	20 days
1918	25 days
1919	17 days
1920	13 days
1921	18 days
1922	13 days
1923	16 days
1924	20 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

22 years with a frost

Across 22 years with a frost, the median last spring frost at Cornish falls on 14 May and the median first autumn frost on 24 September, which leaves a median of 137 days between them.

Frost dates and growing season at Cornish
Measure	Median, all years	Earliest period	Recent period (1901 to 1923)	Recent against earliest	Fitted trend
Last spring frost	14 May	n/a	14 May	n/a	n/a
First autumn frost	24 September	n/a	24 September	n/a	n/a
Growing days	137 days	n/a	137 days	n/a	n/a

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.

Download the Data

Data for Cornish standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cornish 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 2026-10-17 (17 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).