Cheyenne Agency Weather Records (USC00391649)

Record envelope, standing records and threshold days for Cheyenne Agency (USC00391649), South Dakota, United States, with 57 years of record.

Key Facts for Cheyenne Agency

Cheyenne Agency (USC00391649) is a weather station in South Dakota, United States at 45.02 latitude and -100.30 longitude, 470 m (1,542 ft) above sea level.
The station reports from 1904 to 1960, 57 years of record.
1,464 records set at Cheyenne Agency still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: South Dakota, United States, 45.02 latitude, -100.30 longitude.
Elevation: 470 m (1,542 ft).
Period of record: 1904 to 1960, 57 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 Cheyenne Agency. 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 Cheyenne Agency, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	17.2 C (63.0 F)	-37.2 C (-35.0 F)	n/a	n/a
Feb	22.8 C (73.0 F)	-42.8 C (-45.0 F)	n/a	n/a
Mar	30.6 C (87.1 F)	-31.7 C (-25.1 F)	n/a	n/a
Apr	33.3 C (91.9 F)	-12.2 C (10.0 F)	n/a	n/a
May	38.3 C (100.9 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	40.6 C (105.1 F)	-2.2 C (28.0 F)	n/a	n/a
Jul	44.4 C (111.9 F)	6.1 C (43.0 F)	n/a	n/a
Aug	43.9 C (111.0 F)	1.7 C (35.1 F)	n/a	n/a
Sep	41.1 C (106.0 F)	-5.6 C (21.9 F)	n/a	n/a
Oct	35.6 C (96.1 F)	-10.0 C (14.0 F)	n/a	n/a
Nov	25.6 C (78.1 F)	-27.2 C (-17.0 F)	n/a	n/a
Dec	21.7 C (71.1 F)	-31.7 C (-25.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Cheyenne Agency still stand. 1950 holds the most, with 96.

Standing records at Cheyenne Agency by the year they were set
Year set	Standing records
1904	43
1905	59
1940	51
1941	76
1942	67
1943	71
1944	69
1945	66
1946	57
1947	59
1948	63
1949	72
1950	96
1951	92
1952	56
1953	49
1954	81
1955	73
1956	66
1957	59
1958	64
1959	61
1960	14

Wettest Day of Each Month

Aug: 70.1 mm (2.8 in)

The wettest day on record for each calendar month at Cheyenne Agency. The most was 70.1 mm (2.8 in) on 30 August 1951.

Record daily precipitation for each month at Cheyenne Agency
Month	Record daily precipitation (mm)	Date
Jan	53.3 mm (2.1 in)	4 January 1949
Feb	22.9 mm (0.9 in)	23 February 1942
Mar	40.6 mm (1.6 in)	26 March 1942
Apr	38.1 mm (1.5 in)	2 April 1905
May	68.6 mm (2.7 in)	3 May 1905
Jun	60.7 mm (2.4 in)	6 June 1941
Jul	49.5 mm (1.9 in)	13 July 1904
Aug	70.1 mm (2.8 in)	30 August 1951
Sep	47.2 mm (1.9 in)	23 September 1941
Oct	33.8 mm (1.3 in)	4 October 1951
Nov	38.6 mm (1.5 in)	8 November 1944
Dec	31.2 mm (1.2 in)	7 December 1951

Period of Record Coverage

1904 to 1960

23 years of record at Cheyenne Agency, 1904 to 1960. 7 years have data for under 90 percent of days and are left out of rankings: 1904, 1905, 1940, 1942, 1946, 1947, 1960.

Days with data per year at Cheyenne Agency
Year	Days with data	Share of year	Complete
1904	200	55%	No
1905	175	48%	No
1940	210	57%	No
1941	360	99%	Yes
1942	322	88%	No
1943	361	99%	Yes
1944	366	100%	Yes
1945	330	90%	Yes
1946	319	87%	No
1947	310	85%	No
1948	361	99%	Yes
1949	364	100%	Yes
1950	363	99%	Yes
1951	365	100%	Yes
1952	365	100%	Yes
1953	364	100%	Yes
1954	364	100%	Yes
1955	363	99%	Yes
1956	363	99%	Yes
1957	363	99%	Yes
1958	365	100%	Yes
1959	359	98%	Yes
1960	76	21%	No

Latest Records

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

Climate Trend

17 complete years, 1941 to 1958

One stripe for each of 17 complete years at Cheyenne Agency, 1941 to 1958. Blue stripes are years cooler than the station's own mean of 7.7 C (45.9 F); red stripes are warmer. The coolest year was 1950, at 4.9 C (40.8 F), and the warmest was 1941, at 9.7 C (49.4 F). The strongest colour marks a difference of 2.9 C (5.2 F).

Annual mean temperature at Cheyenne Agency as warming stripes, 1941 to 1958
Year	Annual mean temperature	Difference from the station mean
1941	9.7 C	+1.93 C
1943	7.5 C	-0.25 C
1944	7.1 C	-0.64 C
1945	6.8 C	-0.90 C
1946	8.0 C	+0.28 C
1947	7.6 C	-0.09 C
1948	7.2 C	-0.54 C
1949	7.3 C	-0.42 C
1950	4.9 C	-2.83 C
1951	5.4 C	-2.29 C
1952	7.5 C	-0.19 C
1953	8.8 C	+1.06 C
1954	9.2 C	+1.48 C
1955	8.0 C	+0.29 C
1956	8.6 C	+0.83 C
1957	8.7 C	+0.95 C
1958	9.1 C	+1.35 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 1960

Yearly extremes at Cheyenne Agency: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.4 C (111.9 F)	1941	40.6 C (105.1 F)	23
Coldest night (TNn)	-42.8 C (-45.0 F)	1905	-31.7 C (-25.1 F)	23
Wettest day (Rx1day)	70.1 mm (2.8 in)	1951	40.1 mm (1.6 in)	22
Wettest five days (Rx5day)	106.7 mm (4.2 in)	1954	60.8 mm (2.4 in)	22
Longest dry spell (CDD)	64 days	1952	39 days	22

Hottest day (TXx)

The hottest day of the year at Cheyenne Agency, 1904 to 1960. The record is 44.4 C (111.9 F) in 1941, marked on the chart; the median year is 40.6 C (105.1 F).

Hottest day (TXx) at Cheyenne Agency by year
Year	Hottest day (TXx)
1904	37.8 C (100.0 F)
1905	34.4 C (93.9 F)
1940	41.1 C (106.0 F)
1941	44.4 C (111.9 F)
1942	38.9 C (102.0 F)
1943	41.1 C (106.0 F)
1944	40.0 C (104.0 F)
1945	41.1 C (106.0 F)
1946	37.8 C (100.0 F)
1947	43.9 C (111.0 F)
1948	40.6 C (105.1 F)
1949	43.3 C (109.9 F)
1950	38.3 C (100.9 F)
1951	39.4 C (102.9 F)
1952	43.9 C (111.0 F)
1953	39.4 C (102.9 F)
1954	43.3 C (109.9 F)
1955	41.1 C (106.0 F)
1956	40.6 C (105.1 F)
1957	38.3 C (100.9 F)
1958	43.3 C (109.9 F)
1959	43.9 C (111.0 F)
1960	6.7 C (44.1 F)

Coldest night (TNn)

The coldest night of the year at Cheyenne Agency, 1904 to 1960. The record is -42.8 C (-45.0 F) in 1905, marked on the chart; the median year is -31.7 C (-25.1 F).

Coldest night (TNn) at Cheyenne Agency by year
Year	Coldest night (TNn)
1904	-30.6 C (-23.1 F)
1905	-42.8 C (-45.0 F)
1940	-27.2 C (-17.0 F)
1941	-27.2 C (-17.0 F)
1942	-31.7 C (-25.1 F)
1943	-36.1 C (-33.0 F)
1944	-40.6 C (-41.1 F)
1945	-28.3 C (-18.9 F)
1946	-30.0 C (-22.0 F)
1947	-30.6 C (-23.1 F)
1948	-32.2 C (-26.0 F)
1949	-37.2 C (-35.0 F)
1950	-35.0 C (-31.0 F)
1951	-31.7 C (-25.1 F)
1952	-27.2 C (-17.0 F)
1953	-28.3 C (-18.9 F)
1954	-34.4 C (-29.9 F)
1955	-31.7 C (-25.1 F)
1956	-34.4 C (-29.9 F)
1957	-28.3 C (-18.9 F)
1958	-30.0 C (-22.0 F)
1959	-32.2 C (-26.0 F)
1960	-32.8 C (-27.0 F)

Wettest day (Rx1day)

The wettest day of the year at Cheyenne Agency, 1904 to 1960. The record is 70.1 mm (2.8 in) in 1951, marked on the chart; the median year is 40.1 mm (1.6 in).

Wettest day (Rx1day) at Cheyenne Agency by year
Year	Wettest day (Rx1day)
1904	53.3 mm (2.1 in)
1905	68.6 mm (2.7 in)
1940	19.3 mm (0.8 in)
1941	60.7 mm (2.4 in)
1942	52.8 mm (2.1 in)
1943	40.6 mm (1.6 in)
1944	38.6 mm (1.5 in)
1945	28.7 mm (1.1 in)
1946	41.1 mm (1.6 in)
1947	26.7 mm (1.1 in)
1948	30.2 mm (1.2 in)
1949	53.3 mm (2.1 in)
1950	28.7 mm (1.1 in)
1951	70.1 mm (2.8 in)
1952	39.6 mm (1.6 in)
1953	46.5 mm (1.8 in)
1954	51.8 mm (2.0 in)
1955	38.9 mm (1.5 in)
1956	36.3 mm (1.4 in)
1957	49.8 mm (2.0 in)
1958	22.9 mm (0.9 in)
1959	34.3 mm (1.4 in)
1960	n/a

Wettest five days (Rx5day)

The wettest five days of the year at Cheyenne Agency, 1904 to 1960. The record is 106.7 mm (4.2 in) in 1954, marked on the chart; the median year is 60.8 mm (2.4 in).

Wettest five days (Rx5day) at Cheyenne Agency by year
Year	Wettest five days (Rx5day)
1904	53.3 mm (2.1 in)
1905	96.5 mm (3.8 in)
1940	26.9 mm (1.1 in)
1941	79.8 mm (3.1 in)
1942	94.0 mm (3.7 in)
1943	72.8 mm (2.9 in)
1944	58.2 mm (2.3 in)
1945	43.2 mm (1.7 in)
1946	57.2 mm (2.3 in)
1947	50.8 mm (2.0 in)
1948	46.7 mm (1.8 in)
1949	81.3 mm (3.2 in)
1950	87.7 mm (3.5 in)
1951	83.8 mm (3.3 in)
1952	69.1 mm (2.7 in)
1953	62.2 mm (2.4 in)
1954	106.7 mm (4.2 in)
1955	51.1 mm (2.0 in)
1956	52.5 mm (2.1 in)
1957	68.3 mm (2.7 in)
1958	40.7 mm (1.6 in)
1959	59.4 mm (2.3 in)
1960	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Cheyenne Agency, 1904 to 1960. The record is 64 days in 1952, marked on the chart; the median year is 39 days.

Longest dry spell (CDD) at Cheyenne Agency by year
Year	Longest dry spell (CDD)
1904	53 days
1905	62 days
1940	40 days
1941	26 days
1942	35 days
1943	47 days
1944	34 days
1945	46 days
1946	33 days
1947	39 days
1948	42 days
1949	50 days
1950	38 days
1951	28 days
1952	64 days
1953	19 days
1954	30 days
1955	25 days
1956	39 days
1957	46 days
1958	45 days
1959	27 days
1960	n/a

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 Cheyenne Agency standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cheyenne Agency 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 2026-10-13 (13 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).