Chatham Weather Records (USC00301391)

Record envelope, standing records and threshold days for Chatham (USC00301391), New York, United States, with 67 years of record.

Key Facts for Chatham

Chatham (USC00301391) is a weather station in New York, United States at 42.37 latitude and -73.60 longitude, 128 m (420 ft) above sea level.
The station reports from 1904 to 1970, 67 years of record.
1,464 records set at Chatham still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: New York, United States, 42.37 latitude, -73.60 longitude.
Elevation: 128 m (420 ft).
Period of record: 1904 to 1970, 67 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 Chatham. 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 Chatham, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.3 C (64.9 F)	-33.3 C (-27.9 F)	n/a	n/a
Feb	15.0 C (59.0 F)	-31.1 C (-24.0 F)	n/a	n/a
Mar	27.2 C (81.0 F)	-22.8 C (-9.0 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-12.2 C (10.0 F)	n/a	n/a
May	35.6 C (96.1 F)	-5.0 C (23.0 F)	n/a	n/a
Jun	37.2 C (99.0 F)	0.0 C (32.0 F)	n/a	n/a
Jul	39.4 C (102.9 F)	3.9 C (39.0 F)	n/a	n/a
Aug	37.8 C (100.0 F)	0.6 C (33.1 F)	n/a	n/a
Sep	33.9 C (93.0 F)	-6.7 C (19.9 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-8.3 C (17.1 F)	n/a	n/a
Nov	21.7 C (71.1 F)	-13.3 C (8.1 F)	n/a	n/a
Dec	17.8 C (64.0 F)	-29.4 C (-20.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chatham still stand. 1914 holds the most, with 77.

Standing records at Chatham by the year they were set
Year set	Standing records
1904	26
1905	47
1906	51
1907	46
1908	47
1909	49
1910	36
1911	63
1912	62
1913	68
1914	77
1915	55
1916	51
1917	54
1918	71
1919	51
1920	46
1921	37
1959	45
1960	45
1961	66
1962	46
1963	45
1964	56
1965	51
1966	43
1967	51
1968	45
1969	23
1970	11

Wettest Day of Each Month

Sep: 91.4 mm (3.6 in)

The wettest day on record for each calendar month at Chatham. The most was 91.4 mm (3.6 in) on 12 September 1960.

Record daily precipitation for each month at Chatham
Month	Record daily precipitation (mm)	Date
Jan	45.7 mm (1.8 in)	3 January 1960
Feb	49.0 mm (1.9 in)	9 February 1906
Mar	83.8 mm (3.3 in)	29 March 1919
Apr	63.2 mm (2.5 in)	25 April 1968
May	57.4 mm (2.3 in)	14 May 1918
Jun	62.0 mm (2.4 in)	18 June 1909
Jul	72.4 mm (2.9 in)	8 July 1915
Aug	68.8 mm (2.7 in)	29 August 1911
Sep	91.4 mm (3.6 in)	12 September 1960
Oct	70.4 mm (2.8 in)	28 October 1907
Nov	38.1 mm (1.5 in)	14 November 1904
Dec	52.1 mm (2.1 in)	10 December 1907

Period of Record Coverage

1904 to 1970

30 years of record at Chatham, 1904 to 1970. 4 years have data for under 90 percent of days and are left out of rankings: 1904, 1921, 1959, 1970.

Days with data per year at Chatham
Year	Days with data	Share of year	Complete
1904	177	48%	No
1905	363	99%	Yes
1906	341	93%	Yes
1907	365	100%	Yes
1908	365	100%	Yes
1909	363	99%	Yes
1910	365	100%	Yes
1911	364	100%	Yes
1912	364	99%	Yes
1913	365	100%	Yes
1914	362	99%	Yes
1915	365	100%	Yes
1916	360	98%	Yes
1917	359	98%	Yes
1918	362	99%	Yes
1919	363	99%	Yes
1920	362	99%	Yes
1921	179	49%	No
1959	205	56%	No
1960	361	99%	Yes
1961	351	96%	Yes
1962	359	98%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	363	99%	Yes
1966	364	100%	Yes
1967	363	99%	Yes
1968	332	91%	Yes
1969	364	100%	Yes
1970	90	25%	No

Latest Records

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

Climate Trend

25 complete years, 1905 to 1969

One stripe for each of 25 complete years at Chatham, 1905 to 1969. Blue stripes are years cooler than the station's own mean of 8.7 C (47.6 F); red stripes are warmer. The coolest year was 1917, at 7.3 C (45.1 F), and the warmest was 1913, at 10.0 C (49.9 F). The strongest colour marks a difference of 1.4 C (2.5 F).

Annual mean temperature at Chatham as warming stripes, 1905 to 1969
Year	Annual mean temperature	Difference from the station mean
1905	8.5 C	-0.16 C
1906	9.1 C	+0.41 C
1907	8.1 C	-0.58 C
1908	9.6 C	+0.92 C
1909	8.4 C	-0.27 C
1910	8.7 C	+0.01 C
1911	9.1 C	+0.42 C
1912	8.4 C	-0.34 C
1913	10.0 C	+1.26 C
1914	7.9 C	-0.75 C
1915	9.1 C	+0.39 C
1916	8.5 C	-0.22 C
1917	7.3 C	-1.39 C
1918	9.0 C	+0.30 C
1919	9.4 C	+0.70 C
1920	8.3 C	-0.35 C
1960	8.9 C	+0.22 C
1961	8.9 C	+0.17 C
1962	8.2 C	-0.49 C
1963	8.5 C	-0.18 C
1964	9.2 C	+0.53 C
1965	8.4 C	-0.25 C
1966	8.5 C	-0.16 C
1967	8.2 C	-0.46 C
1969	8.9 C	+0.16 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

1904 to 1970

Yearly extremes at Chatham: 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	35.6 C (96.1 F)	30
Coldest night (TNn)	-33.3 C (-27.9 F)	1968	-25.6 C (-14.1 F)	30
Wettest day (Rx1day)	91.4 mm (3.6 in)	1960	52.1 mm (2.0 in)	30
Wettest five days (Rx5day)	156.2 mm (6.1 in)	1960	74.9 mm (2.9 in)	30
Longest dry spell (CDD)	32 days	1908	18 days	30

Hottest day (TXx)

The hottest day of the year at Chatham, 1904 to 1970. The record is 39.4 C (102.9 F) in 1911, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Chatham by year
Year	Hottest day (TXx)
1904	34.4 C (93.9 F)
1905	35.6 C (96.1 F)
1906	33.9 C (93.0 F)
1907	37.2 C (99.0 F)
1908	35.6 C (96.1 F)
1909	33.3 C (91.9 F)
1910	35.6 C (96.1 F)
1911	39.4 C (102.9 F)
1912	36.1 C (97.0 F)
1913	38.3 C (100.9 F)
1914	35.6 C (96.1 F)
1915	33.3 C (91.9 F)
1916	35.0 C (95.0 F)
1917	36.7 C (98.1 F)
1918	37.8 C (100.0 F)
1919	37.2 C (99.0 F)
1920	33.3 C (91.9 F)
1921	35.6 C (96.1 F)
1959	35.0 C (95.0 F)
1960	32.2 C (90.0 F)
1961	33.3 C (91.9 F)
1962	35.0 C (95.0 F)
1963	35.6 C (96.1 F)
1964	35.6 C (96.1 F)
1965	35.0 C (95.0 F)
1966	36.7 C (98.1 F)
1967	32.8 C (91.0 F)
1968	35.6 C (96.1 F)
1969	34.4 C (93.9 F)
1970	13.9 C (57.0 F)

Coldest night (TNn)

The coldest night of the year at Chatham, 1904 to 1970. The record is -33.3 C (-27.9 F) in 1968, marked on the chart; the median year is -25.6 C (-14.1 F).

Coldest night (TNn) at Chatham by year
Year	Coldest night (TNn)
1904	-18.9 C (-2.0 F)
1905	-21.7 C (-7.1 F)
1906	-25.0 C (-13.0 F)
1907	-26.7 C (-16.1 F)
1908	-27.2 C (-17.0 F)
1909	-27.8 C (-18.0 F)
1910	-24.4 C (-11.9 F)
1911	-23.9 C (-11.0 F)
1912	-26.7 C (-16.1 F)
1913	-21.7 C (-7.1 F)
1914	-26.7 C (-16.1 F)
1915	-20.0 C (-4.0 F)
1916	-25.0 C (-13.0 F)
1917	-28.9 C (-20.0 F)
1918	-28.3 C (-18.9 F)
1919	-25.6 C (-14.1 F)
1920	-31.1 C (-24.0 F)
1921	-22.8 C (-9.0 F)
1959	-21.7 C (-7.1 F)
1960	-22.2 C (-8.0 F)
1961	-29.4 C (-20.9 F)
1962	-26.7 C (-16.1 F)
1963	-28.3 C (-18.9 F)
1964	-25.6 C (-14.1 F)
1965	-25.0 C (-13.0 F)
1966	-24.4 C (-11.9 F)
1967	-25.6 C (-14.1 F)
1968	-33.3 C (-27.9 F)
1969	-29.4 C (-20.9 F)
1970	-26.1 C (-15.0 F)

Wettest day (Rx1day)

The wettest day of the year at Chatham, 1904 to 1970. The record is 91.4 mm (3.6 in) in 1960, marked on the chart; the median year is 52.1 mm (2.0 in).

Wettest day (Rx1day) at Chatham by year
Year	Wettest day (Rx1day)
1904	58.9 mm (2.3 in)
1905	36.1 mm (1.4 in)
1906	53.3 mm (2.1 in)
1907	70.4 mm (2.8 in)
1908	26.2 mm (1.0 in)
1909	62.0 mm (2.4 in)
1910	36.6 mm (1.4 in)
1911	68.8 mm (2.7 in)
1912	53.3 mm (2.1 in)
1913	40.6 mm (1.6 in)
1914	44.5 mm (1.8 in)
1915	72.4 mm (2.9 in)
1916	64.8 mm (2.6 in)
1917	42.7 mm (1.7 in)
1918	63.5 mm (2.5 in)
1919	83.8 mm (3.3 in)
1920	50.8 mm (2.0 in)
1921	47.0 mm (1.9 in)
1959	50.0 mm (2.0 in)
1960	91.4 mm (3.6 in)
1961	38.1 mm (1.5 in)
1962	61.0 mm (2.4 in)
1963	40.6 mm (1.6 in)
1964	33.3 mm (1.3 in)
1965	47.8 mm (1.9 in)
1966	67.3 mm (2.6 in)
1967	41.9 mm (1.6 in)
1968	63.2 mm (2.5 in)
1969	56.9 mm (2.2 in)
1970	16.8 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chatham, 1904 to 1970. The record is 156.2 mm (6.1 in) in 1960, marked on the chart; the median year is 74.9 mm (2.9 in).

Wettest five days (Rx5day) at Chatham by year
Year	Wettest five days (Rx5day)
1904	84.3 mm (3.3 in)
1905	58.9 mm (2.3 in)
1906	79.0 mm (3.1 in)
1907	115.4 mm (4.5 in)
1908	39.9 mm (1.6 in)
1909	75.7 mm (3.0 in)
1910	53.3 mm (2.1 in)
1911	103.6 mm (4.1 in)
1912	108.7 mm (4.3 in)
1913	69.5 mm (2.7 in)
1914	89.8 mm (3.5 in)
1915	94.8 mm (3.7 in)
1916	73.1 mm (2.9 in)
1917	56.9 mm (2.2 in)
1918	84.3 mm (3.3 in)
1919	86.8 mm (3.4 in)
1920	86.3 mm (3.4 in)
1921	57.2 mm (2.3 in)
1959	82.1 mm (3.2 in)
1960	156.2 mm (6.1 in)
1961	58.4 mm (2.3 in)
1962	61.5 mm (2.4 in)
1963	67.5 mm (2.7 in)
1964	49.8 mm (2.0 in)
1965	64.0 mm (2.5 in)
1966	101.6 mm (4.0 in)
1967	65.5 mm (2.6 in)
1968	74.1 mm (2.9 in)
1969	102.4 mm (4.0 in)
1970	23.4 mm (0.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chatham, 1904 to 1970. The record is 32 days in 1908, marked on the chart; the median year is 18 days.

Longest dry spell (CDD) at Chatham by year
Year	Longest dry spell (CDD)
1904	22 days
1905	20 days
1906	13 days
1907	16 days
1908	32 days
1909	13 days
1910	15 days
1911	20 days
1912	12 days
1913	18 days
1914	21 days
1915	23 days
1916	12 days
1917	22 days
1918	18 days
1919	14 days
1920	13 days
1921	16 days
1959	11 days
1960	15 days
1961	17 days
1962	19 days
1963	24 days
1964	21 days
1965	15 days
1966	20 days
1967	17 days
1968	18 days
1969	22 days
1970	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.

Frost Dates and Growing Season

25 years with a frost

Across 25 years with a frost, the median last spring frost at Chatham falls on 14 May and the median first autumn frost on 2 October, which leaves a median of 137 days between them.

Fitted over all years, the growing season changes by -3.5 days per decade at this station.

Frost dates and growing season at Chatham
Measure	Median, all years	Earliest period	Recent period (1905 to 1969)	Recent against earliest	Fitted trend
Last spring frost	14 May	n/a	14 May	n/a	+2.1 days per decade
First autumn frost	2 October	n/a	2 October	n/a	-1.4 days per decade
Growing days	137 days	n/a	137 days	n/a	-3.5 days per decade

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 Chatham standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chatham 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).