Roy 24 NE Mobridge Weather Records (USC00247234)

Record envelope, standing records and threshold days for Roy 24 NE Mobridge (USC00247234), Montana, United States, with 32 years of record.

Key Facts for Roy 24 NE Mobridge

Roy 24 NE Mobridge (USC00247234) is a weather station in Montana, United States at 47.62 latitude and -108.70 longitude, 705 m (2,313 ft) above sea level.
The station reports from 1962 to 1993, 32 years of record.
1,464 records set at Roy 24 NE Mobridge still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.

About the Station

Location: Montana, United States, 47.62 latitude, -108.70 longitude.
Elevation: 705 m (2,313 ft).
Period of record: 1962 to 1993, 32 years.
Eligible elements: tmax, tmin, prcp, snow.

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 Roy 24 NE Mobridge. 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 Roy 24 NE Mobridge, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	21.7 C (71.1 F)	-44.4 C (-47.9 F)	n/a	n/a
Feb	24.4 C (75.9 F)	-41.7 C (-43.1 F)	n/a	n/a
Mar	28.3 C (82.9 F)	-32.8 C (-27.0 F)	n/a	n/a
Apr	33.9 C (93.0 F)	-21.7 C (-7.1 F)	n/a	n/a
May	37.2 C (99.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	43.9 C (111.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	42.8 C (109.0 F)	1.7 C (35.1 F)	n/a	n/a
Aug	43.9 C (111.0 F)	-0.6 C (30.9 F)	n/a	n/a
Sep	40.6 C (105.1 F)	-8.9 C (16.0 F)	n/a	n/a
Oct	34.4 C (93.9 F)	-25.6 C (-14.1 F)	n/a	n/a
Nov	25.6 C (78.1 F)	-35.6 C (-32.1 F)	n/a	n/a
Dec	22.2 C (72.0 F)	-43.3 C (-45.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Roy 24 NE Mobridge still stand. 1969 holds the most, with 82.

Standing records at Roy 24 NE Mobridge by the year they were set
Year set	Standing records
1962	11
1963	7
1964	43
1965	56
1966	54
1967	49
1968	48
1969	82
1970	45
1971	38
1972	76
1973	41
1974	36
1975	38
1976	40
1977	57
1978	35
1979	31
1980	50
1981	31
1982	45
1983	56
1984	39
1985	78
1986	51
1987	40
1988	59
1989	36
1990	43
1991	50
1992	67
1993	32

Wettest Day of Each Month

Jun: 75.2 mm (3.0 in)

The wettest day on record for each calendar month at Roy 24 NE Mobridge. The most was 75.2 mm (3.0 in) on 21 June 1976.

Record daily precipitation for each month at Roy 24 NE Mobridge
Month	Record daily precipitation (mm)	Date
Jan	24.9 mm (1.0 in)	11 January 1988
Feb	14.0 mm (0.6 in)	22 February 1982
Mar	31.0 mm (1.2 in)	26 March 1972
Apr	34.8 mm (1.4 in)	20 April 1973
May	51.1 mm (2.0 in)	13 May 1962
Jun	75.2 mm (3.0 in)	21 June 1976
Jul	59.7 mm (2.4 in)	10 July 1983
Aug	71.1 mm (2.8 in)	24 August 1973
Sep	71.1 mm (2.8 in)	25 September 1986
Oct	21.6 mm (0.9 in)	13 October 1975
Nov	13.2 mm (0.5 in)	12 November 1978
Dec	16.5 mm (0.6 in)	16 December 1977

Period of Record Coverage

1962 to 1993

32 years of record at Roy 24 NE Mobridge, 1962 to 1993. 6 years have data for under 90 percent of days and are left out of rankings: 1962, 1963, 1964, 1989, 1992, 1993.

Days with data per year at Roy 24 NE Mobridge
Year	Days with data	Share of year	Complete
1962	166	45%	No
1963	83	23%	No
1964	312	85%	No
1965	356	98%	Yes
1966	364	100%	Yes
1967	361	99%	Yes
1968	363	99%	Yes
1969	361	99%	Yes
1970	360	99%	Yes
1971	359	98%	Yes
1972	360	98%	Yes
1973	360	99%	Yes
1974	357	98%	Yes
1975	360	99%	Yes
1976	359	98%	Yes
1977	362	99%	Yes
1978	361	99%	Yes
1979	359	98%	Yes
1980	364	99%	Yes
1981	359	98%	Yes
1982	333	91%	Yes
1983	341	93%	Yes
1984	333	91%	Yes
1985	341	93%	Yes
1986	339	93%	Yes
1987	341	93%	Yes
1988	337	92%	Yes
1989	323	88%	No
1990	335	92%	Yes
1991	341	93%	Yes
1992	319	87%	No
1993	187	51%	No

Latest Records

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

Climate Trend

28 complete years, 1965 to 1992

One stripe for each of 28 complete years at Roy 24 NE Mobridge, 1965 to 1992. Blue stripes are years cooler than the station's own mean of 7.2 C (45.0 F); red stripes are warmer. The coolest year was 1982, at 5.4 C (41.8 F), and the warmest was 1987, at 9.2 C (48.5 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Roy 24 NE Mobridge as warming stripes, 1965 to 1992
Year	Annual mean temperature	Difference from the station mean
1965	5.8 C	-1.43 C
1966	6.4 C	-0.77 C
1967	7.2 C	0.00 C
1968	6.7 C	-0.52 C
1969	5.9 C	-1.28 C
1970	6.4 C	-0.81 C
1971	6.2 C	-0.97 C
1972	5.8 C	-1.46 C
1973	7.5 C	+0.28 C
1974	7.7 C	+0.52 C
1975	6.3 C	-0.93 C
1976	8.6 C	+1.40 C
1977	7.6 C	+0.40 C
1978	5.5 C	-1.73 C
1979	6.4 C	-0.81 C
1980	7.8 C	+0.56 C
1981	8.7 C	+1.50 C
1982	5.4 C	-1.77 C
1983	7.6 C	+0.37 C
1984	7.8 C	+0.62 C
1985	5.9 C	-1.29 C
1986	8.2 C	+0.97 C
1987	9.2 C	+1.96 C
1988	8.8 C	+1.61 C
1989	7.0 C	-0.19 C
1990	8.3 C	+1.13 C
1991	8.5 C	+1.25 C
1992	8.7 C	+1.46 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

1962 to 1993

Yearly extremes at Roy 24 NE Mobridge: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.9 C (111.0 F)	1983	39.4 C (102.9 F)	32
Coldest night (TNn)	-44.4 C (-47.9 F)	1969	-35.0 C (-31.0 F)	32
Wettest day (Rx1day)	75.2 mm (3.0 in)	1976	34.7 mm (1.4 in)	32
Wettest five days (Rx5day)	98.8 mm (3.9 in)	1974	56.9 mm (2.2 in)	32
Longest dry spell (CDD)	67 days	1992	40 days	32

Hottest day (TXx)

The hottest day of the year at Roy 24 NE Mobridge, 1962 to 1993. The record is 43.9 C (111.0 F) in 1983, marked on the chart; the median year is 39.4 C (102.9 F).

Hottest day (TXx) at Roy 24 NE Mobridge by year
Year	Hottest day (TXx)
1962	35.6 C (96.1 F)
1963	35.0 C (95.0 F)
1964	40.6 C (105.1 F)
1965	39.4 C (102.9 F)
1966	42.8 C (109.0 F)
1967	38.9 C (102.0 F)
1968	38.9 C (102.0 F)
1969	42.8 C (109.0 F)
1970	40.6 C (105.1 F)
1971	41.7 C (107.1 F)
1972	38.3 C (100.9 F)
1973	40.6 C (105.1 F)
1974	38.9 C (102.0 F)
1975	41.1 C (106.0 F)
1976	40.0 C (104.0 F)
1977	37.8 C (100.0 F)
1978	37.8 C (100.0 F)
1979	38.3 C (100.9 F)
1980	40.0 C (104.0 F)
1981	40.0 C (104.0 F)
1982	36.7 C (98.1 F)
1983	43.9 C (111.0 F)
1984	42.2 C (108.0 F)
1985	40.6 C (105.1 F)
1986	37.8 C (100.0 F)
1987	38.9 C (102.0 F)
1988	43.9 C (111.0 F)
1989	39.4 C (102.9 F)
1990	41.1 C (106.0 F)
1991	38.9 C (102.0 F)
1992	38.9 C (102.0 F)
1993	36.1 C (97.0 F)

Coldest night (TNn)

The coldest night of the year at Roy 24 NE Mobridge, 1962 to 1993. The record is -44.4 C (-47.9 F) in 1969, marked on the chart; the median year is -35.0 C (-31.0 F).

Coldest night (TNn) at Roy 24 NE Mobridge by year
Year	Coldest night (TNn)
1962	-22.2 C (-8.0 F)
1963	-12.8 C (9.0 F)
1964	-38.3 C (-36.9 F)
1965	-33.9 C (-29.0 F)
1966	-35.0 C (-31.0 F)
1967	-30.6 C (-23.1 F)
1968	-40.6 C (-41.1 F)
1969	-44.4 C (-47.9 F)
1970	-35.0 C (-31.0 F)
1971	-37.8 C (-36.0 F)
1972	-41.7 C (-43.1 F)
1973	-29.4 C (-20.9 F)
1974	-37.8 C (-36.0 F)
1975	-32.2 C (-26.0 F)
1976	-32.8 C (-27.0 F)
1977	-40.6 C (-41.1 F)
1978	-36.1 C (-33.0 F)
1979	-39.4 C (-38.9 F)
1980	-31.7 C (-25.1 F)
1981	-30.0 C (-22.0 F)
1982	-41.7 C (-43.1 F)
1983	-42.2 C (-44.0 F)
1984	-36.1 C (-33.0 F)
1985	-37.2 C (-35.0 F)
1986	-33.9 C (-29.0 F)
1987	-25.0 C (-13.0 F)
1988	-34.4 C (-29.9 F)
1989	-43.3 C (-45.9 F)
1990	-38.9 C (-38.0 F)
1991	-34.4 C (-29.9 F)
1992	-34.4 C (-29.9 F)
1993	-32.8 C (-27.0 F)

Wettest day (Rx1day)

The wettest day of the year at Roy 24 NE Mobridge, 1962 to 1993. The record is 75.2 mm (3.0 in) in 1976, marked on the chart; the median year is 34.7 mm (1.4 in).

Wettest day (Rx1day) at Roy 24 NE Mobridge by year
Year	Wettest day (Rx1day)
1962	51.1 mm (2.0 in)
1963	27.7 mm (1.1 in)
1964	33.5 mm (1.3 in)
1965	41.9 mm (1.6 in)
1966	18.3 mm (0.7 in)
1967	25.9 mm (1.0 in)
1968	43.4 mm (1.7 in)
1969	24.9 mm (1.0 in)
1970	43.9 mm (1.7 in)
1971	38.9 mm (1.5 in)
1972	34.3 mm (1.4 in)
1973	71.1 mm (2.8 in)
1974	41.4 mm (1.6 in)
1975	44.5 mm (1.8 in)
1976	75.2 mm (3.0 in)
1977	24.6 mm (1.0 in)
1978	49.8 mm (2.0 in)
1979	22.9 mm (0.9 in)
1980	29.2 mm (1.1 in)
1981	27.7 mm (1.1 in)
1982	42.4 mm (1.7 in)
1983	59.7 mm (2.4 in)
1984	20.1 mm (0.8 in)
1985	58.9 mm (2.3 in)
1986	71.1 mm (2.8 in)
1987	14.0 mm (0.6 in)
1988	46.5 mm (1.8 in)
1989	27.9 mm (1.1 in)
1990	25.1 mm (1.0 in)
1991	35.1 mm (1.4 in)
1992	22.6 mm (0.9 in)
1993	31.8 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Roy 24 NE Mobridge, 1962 to 1993. The record is 98.8 mm (3.9 in) in 1974, marked on the chart; the median year is 56.9 mm (2.2 in).

Wettest five days (Rx5day) at Roy 24 NE Mobridge by year
Year	Wettest five days (Rx5day)
1962	63.0 mm (2.5 in)
1963	58.1 mm (2.3 in)
1964	60.5 mm (2.4 in)
1965	52.3 mm (2.1 in)
1966	28.2 mm (1.1 in)
1967	66.0 mm (2.6 in)
1968	61.9 mm (2.4 in)
1969	48.2 mm (1.9 in)
1970	50.6 mm (2.0 in)
1971	51.6 mm (2.0 in)
1972	46.3 mm (1.8 in)
1973	74.9 mm (2.9 in)
1974	98.8 mm (3.9 in)
1975	60.0 mm (2.4 in)
1976	93.5 mm (3.7 in)
1977	45.8 mm (1.8 in)
1978	81.8 mm (3.2 in)
1979	40.9 mm (1.6 in)
1980	36.1 mm (1.4 in)
1981	36.5 mm (1.4 in)
1982	68.6 mm (2.7 in)
1983	62.8 mm (2.5 in)
1984	33.6 mm (1.3 in)
1985	75.4 mm (3.0 in)
1986	76.2 mm (3.0 in)
1987	38.1 mm (1.5 in)
1988	50.6 mm (2.0 in)
1989	50.5 mm (2.0 in)
1990	55.7 mm (2.2 in)
1991	85.6 mm (3.4 in)
1992	63.5 mm (2.5 in)
1993	51.0 mm (2.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Roy 24 NE Mobridge, 1962 to 1993. The record is 67 days in 1992, marked on the chart; the median year is 40 days.

Longest dry spell (CDD) at Roy 24 NE Mobridge by year
Year	Longest dry spell (CDD)
1962	25 days
1963	46 days
1964	40 days
1965	50 days
1966	38 days
1967	36 days
1968	25 days
1969	53 days
1970	39 days
1971	45 days
1972	33 days
1973	50 days
1974	48 days
1975	21 days
1976	35 days
1977	40 days
1978	33 days
1979	46 days
1980	41 days
1981	46 days
1982	53 days
1983	26 days
1984	49 days
1985	32 days
1986	29 days
1987	50 days
1988	34 days
1989	15 days
1990	50 days
1991	39 days
1992	67 days
1993	33 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

28 years with a frost

Across 28 years with a frost, the median last spring frost at Roy 24 NE Mobridge falls on 15 May and the median first autumn frost on 17 September, which leaves a median of 126 days between them.

Fitted over all years, the growing season changes by +4.2 days per decade at this station.

Frost dates and growing season at Roy 24 NE Mobridge
Measure	Median, all years	Earliest period	Recent period (1965 to 1992)	Recent against earliest	Fitted trend
Last spring frost	15 May	n/a	15 May	n/a	-5.3 days per decade
First autumn frost	17 September	n/a	17 September	n/a	-1.1 days per decade
Growing days	126 days	n/a	126 days	n/a	+4.2 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 Roy 24 NE Mobridge standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Roy 24 NE Mobridge 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).