Custer Weather Records (USW00024040)

Record envelope, standing records and threshold days for Custer (USW00024040), Montana, United States, with 35 years of record.

Key Facts for Custer

Custer (USW00024040) is a weather station in Montana, United States at 46.13 latitude and -107.53 longitude, 836 m (2,743 ft) above sea level.
The station reports from 1941 to 1975, 35 years of record.
1,464 records set at Custer still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Montana, United States, 46.13 latitude, -107.53 longitude.
Elevation: 836 m (2,743 ft).
Period of record: 1941 to 1975, 35 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 Custer. 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 Custer, 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)	-40.6 C (-41.1 F)	n/a	n/a
Feb	18.3 C (64.9 F)	-37.2 C (-35.0 F)	n/a	n/a
Mar	26.1 C (79.0 F)	-32.2 C (-26.0 F)	n/a	n/a
Apr	33.3 C (91.9 F)	-11.7 C (10.9 F)	n/a	n/a
May	35.0 C (95.0 F)	-6.1 C (21.0 F)	n/a	n/a
Jun	40.0 C (104.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	41.1 C (106.0 F)	2.8 C (37.0 F)	n/a	n/a
Aug	41.7 C (107.1 F)	2.2 C (36.0 F)	n/a	n/a
Sep	38.3 C (100.9 F)	-5.0 C (23.0 F)	n/a	n/a
Oct	33.9 C (93.0 F)	-17.8 C (0.0 F)	n/a	n/a
Nov	24.4 C (75.9 F)	-26.7 C (-16.1 F)	n/a	n/a
Dec	20.6 C (69.1 F)	-35.0 C (-31.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Custer still stand. 1949 holds the most, with 108.

Standing records at Custer by the year they were set
Year set	Standing records
1941	62
1942	63
1943	79
1944	64
1945	73
1946	62
1947	13
1948	72
1949	108
1950	39
1962	8
1963	80
1964	75
1965	69
1966	75
1967	64
1968	63
1969	62
1970	52
1971	56
1972	92
1973	50
1974	57
1975	26

Wettest Day of Each Month

Sep: 80.5 mm (3.2 in)

The wettest day on record for each calendar month at Custer. The most was 80.5 mm (3.2 in) on 7 September 1941.

Record daily precipitation for each month at Custer
Month	Record daily precipitation (mm)	Date
Jan	17.8 mm (0.7 in)	9 January 1971
Feb	10.4 mm (0.4 in)	19 February 1949
Mar	14.5 mm (0.6 in)	2 March 1967
Apr	45.5 mm (1.8 in)	28 April 1963
May	34.3 mm (1.4 in)	10 May 1967
Jun	69.9 mm (2.8 in)	9 June 1968
Jul	28.7 mm (1.1 in)	10 July 1948
Aug	40.1 mm (1.6 in)	30 August 1971
Sep	80.5 mm (3.2 in)	7 September 1941
Oct	40.9 mm (1.6 in)	31 October 1974
Nov	19.1 mm (0.8 in)	4 November 1968
Dec	16.3 mm (0.6 in)	1 December 1947

Period of Record Coverage

1941 to 1975

24 years of record at Custer, 1941 to 1975. 5 years have data for under 90 percent of days and are left out of rankings: 1941, 1947, 1950, 1962, 1975.

Days with data per year at Custer
Year	Days with data	Share of year	Complete
1941	269	74%	No
1942	345	95%	Yes
1943	330	90%	Yes
1944	366	100%	Yes
1945	362	99%	Yes
1946	339	93%	Yes
1947	76	21%	No
1948	366	100%	Yes
1949	364	100%	Yes
1950	134	37%	No
1962	31	8%	No
1963	365	100%	Yes
1964	363	99%	Yes
1965	364	100%	Yes
1966	364	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	348	95%	Yes
1970	363	99%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	180	49%	No

Latest Records

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

Climate Trend

14 complete years, 1944 to 1974

One stripe for each of 14 complete years at Custer, 1944 to 1974. 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 1949, at 6.6 C (43.8 F), and the warmest was 1963, at 9.3 C (48.7 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at Custer as warming stripes, 1944 to 1974
Year	Annual mean temperature	Difference from the station mean
1944	7.3 C	-0.74 C
1948	7.8 C	-0.32 C
1949	6.6 C	-1.52 C
1963	9.3 C	+1.19 C
1964	8.1 C	+0.02 C
1965	7.8 C	-0.29 C
1966	8.1 C	+0.02 C
1967	8.8 C	+0.75 C
1968	8.1 C	+0.05 C
1970	7.8 C	-0.32 C
1971	7.8 C	-0.25 C
1972	7.7 C	-0.38 C
1973	8.7 C	+0.63 C
1974	9.3 C	+1.18 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

1941 to 1975

Yearly extremes at Custer: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	1949	38.6 C (101.5 F)	24
Coldest night (TNn)	-40.6 C (-41.1 F)	1969	-34.1 C (-29.5 F)	24
Wettest day (Rx1day)	80.5 mm (3.2 in)	1941	32.5 mm (1.3 in)	25
Wettest five days (Rx5day)	110.6 mm (4.4 in)	1968	53.1 mm (2.1 in)	25
Longest dry spell (CDD)	67 days	1967	32 days	25

Hottest day (TXx)

The hottest day of the year at Custer, 1941 to 1975. The record is 41.7 C (107.1 F) in 1949, marked on the chart; the median year is 38.6 C (101.5 F).

Hottest day (TXx) at Custer by year
Year	Hottest day (TXx)
1941	40.0 C (104.0 F)
1942	38.9 C (102.0 F)
1943	39.4 C (102.9 F)
1944	35.6 C (96.1 F)
1945	38.9 C (102.0 F)
1946	38.3 C (100.9 F)
1947	30.0 C (86.0 F)
1948	40.6 C (105.1 F)
1949	41.7 C (107.1 F)
1950	26.1 C (79.0 F)
1951	n/a
1962	18.3 C (64.9 F)
1963	39.4 C (102.9 F)
1964	39.4 C (102.9 F)
1965	38.9 C (102.0 F)
1966	41.1 C (106.0 F)
1967	36.7 C (98.1 F)
1968	36.1 C (97.0 F)
1969	38.3 C (100.9 F)
1970	38.3 C (100.9 F)
1971	39.4 C (102.9 F)
1972	36.7 C (98.1 F)
1973	38.9 C (102.0 F)
1974	37.8 C (100.0 F)
1975	33.3 C (91.9 F)

Coldest night (TNn)

The coldest night of the year at Custer, 1941 to 1975. The record is -40.6 C (-41.1 F) in 1969, marked on the chart; the median year is -34.1 C (-29.5 F).

Coldest night (TNn) at Custer by year
Year	Coldest night (TNn)
1941	-34.4 C (-29.9 F)
1942	-38.3 C (-36.9 F)
1943	-32.2 C (-26.0 F)
1944	-30.6 C (-23.1 F)
1945	-35.0 C (-31.0 F)
1946	-27.8 C (-18.0 F)
1947	-21.7 C (-7.1 F)
1948	-30.0 C (-22.0 F)
1949	-37.8 C (-36.0 F)
1950	-33.9 C (-29.0 F)
1951	n/a
1962	-20.0 C (-4.0 F)
1963	-38.3 C (-36.9 F)
1964	-35.0 C (-31.0 F)
1965	-30.0 C (-22.0 F)
1966	-32.8 C (-27.0 F)
1967	-31.7 C (-25.1 F)
1968	-36.1 C (-33.0 F)
1969	-40.6 C (-41.1 F)
1970	-30.6 C (-23.1 F)
1971	-37.2 C (-35.0 F)
1972	-34.4 C (-29.9 F)
1973	-35.6 C (-32.1 F)
1974	-34.4 C (-29.9 F)
1975	-29.4 C (-20.9 F)

Wettest day (Rx1day)

The wettest day of the year at Custer, 1941 to 1975. The record is 80.5 mm (3.2 in) in 1941, marked on the chart; the median year is 32.5 mm (1.3 in).

Wettest day (Rx1day) at Custer by year
Year	Wettest day (Rx1day)
1941	80.5 mm (3.2 in)
1942	33.3 mm (1.3 in)
1943	27.2 mm (1.1 in)
1944	41.7 mm (1.6 in)
1945	17.8 mm (0.7 in)
1946	23.9 mm (0.9 in)
1947	16.3 mm (0.6 in)
1948	28.7 mm (1.1 in)
1949	17.3 mm (0.7 in)
1950	7.9 mm (0.31 in)
1951	39.1 mm (1.5 in)
1962	3.8 mm (0.15 in)
1963	45.5 mm (1.8 in)
1964	41.4 mm (1.6 in)
1965	24.1 mm (0.9 in)
1966	14.7 mm (0.6 in)
1967	34.3 mm (1.4 in)
1968	69.9 mm (2.8 in)
1969	49.5 mm (1.9 in)
1970	34.8 mm (1.4 in)
1971	40.1 mm (1.6 in)
1972	22.9 mm (0.9 in)
1973	26.7 mm (1.1 in)
1974	40.9 mm (1.6 in)
1975	32.5 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Custer, 1941 to 1975. The record is 110.6 mm (4.4 in) in 1968, marked on the chart; the median year is 53.1 mm (2.1 in).

Wettest five days (Rx5day) at Custer by year
Year	Wettest five days (Rx5day)
1941	92.7 mm (3.6 in)
1942	66.6 mm (2.6 in)
1943	57.0 mm (2.2 in)
1944	67.9 mm (2.7 in)
1945	28.8 mm (1.1 in)
1946	63.2 mm (2.5 in)
1947	16.6 mm (0.7 in)
1948	60.7 mm (2.4 in)
1949	30.5 mm (1.2 in)
1950	11.7 mm (0.5 in)
1951	52.1 mm (2.1 in)
1962	3.8 mm (0.15 in)
1963	76.0 mm (3.0 in)
1964	61.1 mm (2.4 in)
1965	40.0 mm (1.6 in)
1966	24.1 mm (0.9 in)
1967	53.1 mm (2.1 in)
1968	110.6 mm (4.4 in)
1969	69.1 mm (2.7 in)
1970	65.3 mm (2.6 in)
1971	57.1 mm (2.2 in)
1972	34.6 mm (1.4 in)
1973	48.0 mm (1.9 in)
1974	47.3 mm (1.9 in)
1975	43.1 mm (1.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Custer, 1941 to 1975. The record is 67 days in 1967, marked on the chart; the median year is 32 days.

Longest dry spell (CDD) at Custer by year
Year	Longest dry spell (CDD)
1941	42 days
1942	26 days
1943	37 days
1944	48 days
1945	43 days
1946	32 days
1947	30 days
1948	56 days
1949	62 days
1950	37 days
1951	16 days
1962	23 days
1963	50 days
1964	36 days
1965	43 days
1966	29 days
1967	67 days
1968	25 days
1969	22 days
1970	28 days
1971	30 days
1972	26 days
1973	30 days
1974	34 days
1975	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 Custer standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Custer 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 2026-10-15 (15 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).