Telegraph Creek Weather Records (USC00248161)

Record envelope, standing records and threshold days for Telegraph Creek (USC00248161), Montana, United States, with 30 years of record.

Key Facts for Telegraph Creek

Telegraph Creek (USC00248161) is a weather station in Montana, United States at 47.80 latitude and -107.60 longitude, 775 m (2,543 ft) above sea level.
The station reports from 1945 to 1974, 30 years of record.
1,464 records set at Telegraph Creek 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, 47.80 latitude, -107.60 longitude.
Elevation: 775 m (2,543 ft).
Period of record: 1945 to 1974, 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 Telegraph Creek. 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 Telegraph Creek, 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)	-45.0 C (-49.0 F)	n/a	n/a
Feb	18.9 C (66.0 F)	-35.6 C (-32.1 F)	n/a	n/a
Mar	26.1 C (79.0 F)	-34.4 C (-29.9 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-18.3 C (-0.9 F)	n/a	n/a
May	35.0 C (95.0 F)	-12.8 C (9.0 F)	n/a	n/a
Jun	38.3 C (100.9 F)	-1.7 C (28.9 F)	n/a	n/a
Jul	41.7 C (107.1 F)	-1.1 C (30.0 F)	n/a	n/a
Aug	41.7 C (107.1 F)	-2.2 C (28.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	-10.0 C (14.0 F)	n/a	n/a
Oct	32.2 C (90.0 F)	-18.3 C (-0.9 F)	n/a	n/a
Nov	23.3 C (73.9 F)	-32.2 C (-26.0 F)	n/a	n/a
Dec	17.8 C (64.0 F)	-40.6 C (-41.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Telegraph Creek still stand. 1972 holds the most, with 76.

Standing records at Telegraph Creek by the year they were set
Year set	Standing records
1945	49
1946	54
1947	34
1948	41
1949	50
1950	65
1951	67
1952	36
1953	48
1954	67
1955	49
1956	50
1957	51
1958	54
1959	49
1960	41
1961	66
1962	64
1963	58
1964	44
1965	48
1966	54
1967	38
1968	57
1969	47
1970	32
1971	37
1972	76
1973	34
1974	4

Wettest Day of Each Month

Aug: 83.3 mm (3.3 in)

The wettest day on record for each calendar month at Telegraph Creek. The most was 83.3 mm (3.3 in) on 20 August 1964.

Record daily precipitation for each month at Telegraph Creek
Month	Record daily precipitation (mm)	Date
Jan	15.5 mm (0.6 in)	17 January 1970
Feb	7.6 mm (0.30 in)	15 February 1961
Mar	20.3 mm (0.8 in)	11 March 1954
Apr	78.2 mm (3.1 in)	20 April 1973
May	68.8 mm (2.7 in)	28 May 1956
Jun	76.2 mm (3.0 in)	21 June 1974
Jul	50.8 mm (2.0 in)	2 July 1974
Aug	83.3 mm (3.3 in)	20 August 1964
Sep	32.5 mm (1.3 in)	5 September 1954
Oct	40.4 mm (1.6 in)	15 October 1962
Nov	16.3 mm (0.6 in)	4 November 1958
Dec	20.3 mm (0.8 in)	22 December 1973

Period of Record Coverage

1945 to 1974

30 years of record at Telegraph Creek, 1945 to 1974. 7 years have data for under 90 percent of days and are left out of rankings: 1949, 1950, 1951, 1963, 1971, 1973, 1974.

Days with data per year at Telegraph Creek
Year	Days with data	Share of year	Complete
1945	361	99%	Yes
1946	362	99%	Yes
1947	337	92%	Yes
1948	340	93%	Yes
1949	307	84%	No
1950	325	89%	No
1951	312	85%	No
1952	335	92%	Yes
1953	336	92%	Yes
1954	341	93%	Yes
1955	353	97%	Yes
1956	360	98%	Yes
1957	355	97%	Yes
1958	362	99%	Yes
1959	364	100%	Yes
1960	352	96%	Yes
1961	349	96%	Yes
1962	363	99%	Yes
1963	319	87%	No
1964	351	96%	Yes
1965	348	95%	Yes
1966	358	98%	Yes
1967	361	99%	Yes
1968	343	94%	Yes
1969	353	97%	Yes
1970	344	94%	Yes
1971	306	84%	No
1972	334	91%	Yes
1973	265	73%	No
1974	51	14%	No

Latest Records

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

Climate Trend

20 complete years, 1945 to 1972

One stripe for each of 20 complete years at Telegraph Creek, 1945 to 1972. Blue stripes are years cooler than the station's own mean of 6.4 C (43.5 F); red stripes are warmer. The coolest year was 1965, at 5.1 C (41.2 F), and the warmest was 1961, at 8.4 C (47.0 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Telegraph Creek as warming stripes, 1945 to 1972
Year	Annual mean temperature	Difference from the station mean
1945	6.1 C	-0.28 C
1946	7.0 C	+0.61 C
1948	6.7 C	+0.33 C
1952	6.1 C	-0.30 C
1954	6.3 C	-0.09 C
1955	5.2 C	-1.16 C
1956	6.9 C	+0.48 C
1957	6.9 C	+0.50 C
1958	7.5 C	+1.08 C
1959	6.1 C	-0.33 C
1960	6.8 C	+0.43 C
1961	8.4 C	+1.95 C
1962	7.1 C	+0.70 C
1964	6.2 C	-0.18 C
1965	5.1 C	-1.29 C
1966	6.0 C	-0.43 C
1967	6.4 C	-0.03 C
1968	6.8 C	+0.42 C
1969	5.2 C	-1.16 C
1972	5.2 C	-1.22 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

1945 to 1974

Yearly extremes at Telegraph Creek: 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	39.7 C (103.5 F)	30
Coldest night (TNn)	-45.0 C (-49.0 F)	1969	-34.4 C (-29.9 F)	30
Wettest day (Rx1day)	83.3 mm (3.3 in)	1964	32.9 mm (1.3 in)	30
Wettest five days (Rx5day)	108.7 mm (4.3 in)	1964	43.9 mm (1.7 in)	30
Longest dry spell (CDD)	80 days	1973	40 days	30

Hottest day (TXx)

The hottest day of the year at Telegraph Creek, 1945 to 1974. The record is 41.7 C (107.1 F) in 1949, marked on the chart; the median year is 39.7 C (103.5 F).

Hottest day (TXx) at Telegraph Creek by year
Year	Hottest day (TXx)
1945	39.4 C (102.9 F)
1946	38.3 C (100.9 F)
1947	41.1 C (106.0 F)
1948	38.3 C (100.9 F)
1949	41.7 C (107.1 F)
1950	37.8 C (100.0 F)
1951	40.0 C (104.0 F)
1952	37.8 C (100.0 F)
1953	40.0 C (104.0 F)
1954	38.3 C (100.9 F)
1955	41.1 C (106.0 F)
1956	38.9 C (102.0 F)
1957	40.6 C (105.1 F)
1958	38.9 C (102.0 F)
1959	40.6 C (105.1 F)
1960	41.7 C (107.1 F)
1961	41.1 C (106.0 F)
1962	36.7 C (98.1 F)
1963	40.6 C (105.1 F)
1964	40.0 C (104.0 F)
1965	36.7 C (98.1 F)
1966	41.1 C (106.0 F)
1967	38.3 C (100.9 F)
1968	38.3 C (100.9 F)
1969	40.0 C (104.0 F)
1970	38.3 C (100.9 F)
1971	41.1 C (106.0 F)
1972	37.8 C (100.0 F)
1973	40.0 C (104.0 F)
1974	32.8 C (91.0 F)

Coldest night (TNn)

The coldest night of the year at Telegraph Creek, 1945 to 1974. The record is -45.0 C (-49.0 F) in 1969, marked on the chart; the median year is -34.4 C (-29.9 F).

Coldest night (TNn) at Telegraph Creek by year
Year	Coldest night (TNn)
1945	-33.3 C (-27.9 F)
1946	-31.7 C (-25.1 F)
1947	-33.9 C (-29.0 F)
1948	-34.4 C (-29.9 F)
1949	-35.6 C (-32.1 F)
1950	-39.4 C (-38.9 F)
1951	-34.4 C (-29.9 F)
1952	-34.4 C (-29.9 F)
1953	-27.8 C (-18.0 F)
1954	-40.6 C (-41.1 F)
1955	-33.3 C (-27.9 F)
1956	-36.7 C (-34.1 F)
1957	-38.3 C (-36.9 F)
1958	-29.4 C (-20.9 F)
1959	-33.3 C (-27.9 F)
1960	-34.4 C (-29.9 F)
1961	-31.1 C (-24.0 F)
1962	-34.4 C (-29.9 F)
1963	-36.7 C (-34.1 F)
1964	-37.8 C (-36.0 F)
1965	-31.1 C (-24.0 F)
1966	-32.2 C (-26.0 F)
1967	-31.7 C (-25.1 F)
1968	-40.6 C (-41.1 F)
1969	-45.0 C (-49.0 F)
1970	-36.7 C (-34.1 F)
1971	-28.9 C (-20.0 F)
1972	-44.4 C (-47.9 F)
1973	-28.9 C (-20.0 F)
1974	-27.8 C (-18.0 F)

Wettest day (Rx1day)

The wettest day of the year at Telegraph Creek, 1945 to 1974. The record is 83.3 mm (3.3 in) in 1964, marked on the chart; the median year is 32.9 mm (1.3 in).

Wettest day (Rx1day) at Telegraph Creek by year
Year	Wettest day (Rx1day)
1945	24.6 mm (1.0 in)
1946	39.6 mm (1.6 in)
1947	21.1 mm (0.8 in)
1948	33.3 mm (1.3 in)
1949	25.4 mm (1.0 in)
1950	29.2 mm (1.1 in)
1951	17.0 mm (0.7 in)
1952	20.3 mm (0.8 in)
1953	27.9 mm (1.1 in)
1954	32.5 mm (1.3 in)
1955	63.5 mm (2.5 in)
1956	68.8 mm (2.7 in)
1957	34.5 mm (1.4 in)
1958	27.9 mm (1.1 in)
1959	24.4 mm (1.0 in)
1960	12.2 mm (0.5 in)
1961	17.5 mm (0.7 in)
1962	45.0 mm (1.8 in)
1963	43.2 mm (1.7 in)
1964	83.3 mm (3.3 in)
1965	31.8 mm (1.3 in)
1966	21.8 mm (0.9 in)
1967	29.2 mm (1.1 in)
1968	36.1 mm (1.4 in)
1969	38.4 mm (1.5 in)
1970	50.8 mm (2.0 in)
1971	40.6 mm (1.6 in)
1972	38.6 mm (1.5 in)
1973	78.2 mm (3.1 in)
1974	76.2 mm (3.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Telegraph Creek, 1945 to 1974. The record is 108.7 mm (4.3 in) in 1964, marked on the chart; the median year is 43.9 mm (1.7 in).

Wettest five days (Rx5day) at Telegraph Creek by year
Year	Wettest five days (Rx5day)
1945	26.6 mm (1.0 in)
1946	40.6 mm (1.6 in)
1947	29.8 mm (1.2 in)
1948	33.6 mm (1.3 in)
1949	26.2 mm (1.0 in)
1950	35.0 mm (1.4 in)
1951	36.5 mm (1.4 in)
1952	21.8 mm (0.9 in)
1953	54.1 mm (2.1 in)
1954	51.3 mm (2.0 in)
1955	100.3 mm (3.9 in)
1956	72.1 mm (2.8 in)
1957	34.5 mm (1.4 in)
1958	27.9 mm (1.1 in)
1959	37.4 mm (1.5 in)
1960	28.2 mm (1.1 in)
1961	43.4 mm (1.7 in)
1962	74.4 mm (2.9 in)
1963	43.2 mm (1.7 in)
1964	108.7 mm (4.3 in)
1965	49.8 mm (2.0 in)
1966	40.3 mm (1.6 in)
1967	81.0 mm (3.2 in)
1968	58.5 mm (2.3 in)
1969	88.6 mm (3.5 in)
1970	88.2 mm (3.5 in)
1971	51.5 mm (2.0 in)
1972	44.4 mm (1.7 in)
1973	102.8 mm (4.0 in)
1974	76.2 mm (3.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Telegraph Creek, 1945 to 1974. The record is 80 days in 1973, marked on the chart; the median year is 40 days.

Longest dry spell (CDD) at Telegraph Creek by year
Year	Longest dry spell (CDD)
1945	30 days
1946	48 days
1947	33 days
1948	34 days
1949	50 days
1950	26 days
1951	36 days
1952	34 days
1953	48 days
1954	34 days
1955	53 days
1956	46 days
1957	35 days
1958	46 days
1959	52 days
1960	38 days
1961	42 days
1962	31 days
1963	25 days
1964	45 days
1965	53 days
1966	30 days
1967	45 days
1968	38 days
1969	57 days
1970	54 days
1971	50 days
1972	35 days
1973	80 days
1974	23 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

20 years with a frost

Across 20 years with a frost, the median last spring frost at Telegraph Creek falls on 16 May and the median first autumn frost on 16 September, which leaves a median of 120 days between them.

Frost dates and growing season at Telegraph Creek
Measure	Median, all years	Earliest period	Recent period (1945 to 1972)	Recent against earliest	Fitted trend
Last spring frost	16 May	n/a	16 May	n/a	n/a
First autumn frost	16 September	n/a	16 September	n/a	n/a
Growing days	120 days	n/a	120 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 Telegraph Creek standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Telegraph Creek 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).