Merrill Weather Records (USC00185894)

Record envelope, standing records and threshold days for Merrill (USC00185894), Maryland, United States, with 46 years of record.

Key Facts for Merrill

Merrill (USC00185894) is a weather station in Maryland, United States at 39.60 latitude and -79.08 longitude, 546 m (1,790 ft) above sea level.
The station reports from 1951 to 1996, 46 years of record.
2 records set at Merrill still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Merrill set a daily record precipitation of 19.1 mm (0.8 in) on 27 February 1996.

About the Station

Location: Maryland, United States, 39.60 latitude, -79.08 longitude.
Elevation: 546 m (1,790 ft).
Period of record: 1951 to 1996, 46 years.
Eligible elements: prcp, snow, snwd.

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 Merrill. 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 Merrill, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	-13.9 C (7.0 F)	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

2 standing records

2 records at Merrill still stand. 1973 holds the most, with 2.

All-Time Record Progression

3 new records

3 all-time records were set at Merrill between 14 March 1993 and 12 January 1996. Each dot is a new record.

When Merrill set new all-time records
Date	Kind	Detail
1993-03-14	Record snow depth	Record snow depth 91.4 cm (36.0 in)
1996-01-08	Record snow depth	Record snow depth 94.0 cm (37.0 in)
1996-01-12	Record snow depth	Record snow depth 109.2 cm (43.0 in)

Wettest Day of Each Month

Oct: 127.5 mm (5.0 in)

The wettest day on record for each calendar month at Merrill. The most was 127.5 mm (5.0 in) on 16 October 1954.

Record daily precipitation for each month at Merrill
Month	Record daily precipitation (mm)	Date
Jan	49.5 mm (1.9 in)	19 January 1996
Feb	51.6 mm (2.0 in)	19 February 1960
Mar	57.2 mm (2.3 in)	13 March 1972
Apr	63.0 mm (2.5 in)	29 April 1964
May	58.4 mm (2.3 in)	8 May 1960
Jun	106.7 mm (4.2 in)	28 June 1995
Jul	59.4 mm (2.3 in)	13 July 1964
Aug	71.1 mm (2.8 in)	6 August 1995
Sep	52.6 mm (2.1 in)	24 September 1955
Oct	127.5 mm (5.0 in)	16 October 1954
Nov	70.1 mm (2.8 in)	5 November 1985
Dec	90.2 mm (3.6 in)	2 December 1974

Period of Record Coverage

1973 to 1973

1 years of record at Merrill, 1973 to 1973. 1 years have data for under 90 percent of days and are left out of rankings: 1973.

Latest Records

Latest records at Merrill
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 February 1996	Merrill, US	daily rain	19.1 mm (0.8 in)	4.4 mm (0.17 in)	16 years	15 of 100 (Routine)
3 February 1996	Merrill, US	daily snowfall	15.2 cm (6.0 in)	12.7 cm (5.0 in)	24 years	31 of 100 (Routine)
24 January 1996	Merrill, US	daily rain	27.9 mm (1.1 in)	8.8 mm (0.35 in)	30 years	26 of 100 (Routine)
19 January 1996	Merrill, US	monthly rain	49.5 mm (1.9 in)	12.2 mm (0.5 in)	39 years	43 of 100 (Notable)
18 January 1996	Merrill, US	daily snow depth	68.6 cm (27.0 in)	17.8 cm (7.0 in)	17 years	21 of 100 (Routine)
17 January 1996	Merrill, US	daily snow depth	91.4 cm (36.0 in)	40.6 cm (16.0 in)	28 years	40 of 100 (Notable)
16 January 1996	Merrill, US	daily snow depth	96.5 cm (38.0 in)	40.6 cm (16.0 in)	28 years	40 of 100 (Notable)
15 January 1996	Merrill, US	daily snow depth	99.1 cm (39.0 in)	48.3 cm (19.0 in)	28 years	46 of 100 (Notable)
14 January 1996	Merrill, US	all-time snow depth (Tie)	109.2 cm (43.0 in)	tie	0 years	6 of 100 (Routine)
13 January 1996	Merrill, US	all-time snow depth (Tie)	109.2 cm (43.0 in)	tie	0 years	6 of 100 (Routine)
12 January 1996	Merrill, US	all-time snow depth	109.2 cm (43.0 in)	15.2 cm (6.0 in)	0 years	34 of 100 (Routine)
12 January 1996	Merrill, US	daily snowfall	15.2 cm (6.0 in)	7.6 cm (3.0 in)	4 years	17 of 100 (Routine)
11 January 1996	Merrill, US	all-time snow depth (Tie)	94.0 cm (37.0 in)	tie	0 years	6 of 100 (Routine)
10 January 1996	Merrill, US	all-time snow depth (Tie)	94.0 cm (37.0 in)	tie	0 years	6 of 100 (Routine)
9 January 1996	Merrill, US	daily snow depth	91.4 cm (36.0 in)	55.8 cm (22.0 in)	28 years	51 of 100 (Notable)
8 January 1996	Merrill, US	daily rain	35.6 mm (1.4 in)	16.8 mm (0.7 in)	42 years	42 of 100 (Notable)
8 January 1996	Merrill, US	all-time snow depth	94.0 cm (37.0 in)	2.6 cm (1.0 in)	2 years	25 of 100 (Routine)
8 January 1996	Merrill, US	all-time snowfall (Tie)	61.0 cm (24.0 in)	tie	21 years	7 of 100 (Routine)
7 January 1996	Merrill, US	daily snowfall	30.5 cm (12.0 in)	11.7 cm (4.6 in)	4 years	23 of 100 (Routine)
21 December 1995	Merrill, US	daily snowfall (Tie)	10.2 cm (4.0 in)	tie	18 years	2 of 100 (Routine)

Extremes by Year

1951 to 1996

Yearly extremes at Merrill: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	-13.9 C (7.0 F)	1973	-13.9 C (7.0 F)	1
Wettest day (Rx1day)	127.5 mm (5.0 in)	1954	49.5 mm (1.9 in)	46
Wettest five days (Rx5day)	155.0 mm (6.1 in)	1995	78.0 mm (3.1 in)	46
Longest dry spell (CDD)	36 days	1953	15 days	46

Hottest day (TXx)

The hottest day of the year at Merrill, 1951 to 1996. The record is -13.9 C (7.0 F) in 1973, marked on the chart; the median year is -13.9 C (7.0 F).

Hottest day (TXx) at Merrill by year
Year	Hottest day (TXx)
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	-13.9 C (7.0 F)
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a

Wettest day (Rx1day)

The wettest day of the year at Merrill, 1951 to 1996. The record is 127.5 mm (5.0 in) in 1954, marked on the chart; the median year is 49.5 mm (1.9 in).

Wettest day (Rx1day) at Merrill by year
Year	Wettest day (Rx1day)
1951	37.8 mm (1.5 in)
1952	64.0 mm (2.5 in)
1953	42.2 mm (1.7 in)
1954	127.5 mm (5.0 in)
1955	58.4 mm (2.3 in)
1956	70.4 mm (2.8 in)
1957	76.2 mm (3.0 in)
1958	32.0 mm (1.3 in)
1959	85.9 mm (3.4 in)
1960	58.4 mm (2.3 in)
1961	55.1 mm (2.2 in)
1962	40.6 mm (1.6 in)
1963	44.2 mm (1.7 in)
1964	63.0 mm (2.5 in)
1965	34.5 mm (1.4 in)
1966	32.5 mm (1.3 in)
1967	47.8 mm (1.9 in)
1968	58.4 mm (2.3 in)
1969	48.3 mm (1.9 in)
1970	35.6 mm (1.4 in)
1971	35.6 mm (1.4 in)
1972	57.2 mm (2.3 in)
1973	58.4 mm (2.3 in)
1974	90.2 mm (3.6 in)
1975	41.4 mm (1.6 in)
1976	48.8 mm (1.9 in)
1977	39.6 mm (1.6 in)
1978	57.2 mm (2.3 in)
1979	44.5 mm (1.8 in)
1980	57.9 mm (2.3 in)
1981	48.0 mm (1.9 in)
1982	40.6 mm (1.6 in)
1983	33.5 mm (1.3 in)
1984	45.7 mm (1.8 in)
1985	70.1 mm (2.8 in)
1986	41.9 mm (1.6 in)
1987	40.4 mm (1.6 in)
1988	55.9 mm (2.2 in)
1989	52.8 mm (2.1 in)
1990	49.5 mm (1.9 in)
1991	45.0 mm (1.8 in)
1992	58.4 mm (2.3 in)
1993	51.3 mm (2.0 in)
1994	51.1 mm (2.0 in)
1995	106.7 mm (4.2 in)
1996	49.5 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Merrill, 1951 to 1996. The record is 155.0 mm (6.1 in) in 1995, marked on the chart; the median year is 78.0 mm (3.1 in).

Wettest five days (Rx5day) at Merrill by year
Year	Wettest five days (Rx5day)
1951	85.6 mm (3.4 in)
1952	90.1 mm (3.5 in)
1953	53.1 mm (2.1 in)
1954	133.3 mm (5.2 in)
1955	100.5 mm (4.0 in)
1956	95.3 mm (3.8 in)
1957	84.8 mm (3.3 in)
1958	73.2 mm (2.9 in)
1959	100.7 mm (4.0 in)
1960	111.3 mm (4.4 in)
1961	79.2 mm (3.1 in)
1962	62.2 mm (2.4 in)
1963	73.9 mm (2.9 in)
1964	88.2 mm (3.5 in)
1965	46.0 mm (1.8 in)
1966	65.5 mm (2.6 in)
1967	73.2 mm (2.9 in)
1968	88.6 mm (3.5 in)
1969	71.2 mm (2.8 in)
1970	66.4 mm (2.6 in)
1971	76.8 mm (3.0 in)
1972	77.2 mm (3.0 in)
1973	79.6 mm (3.1 in)
1974	99.1 mm (3.9 in)
1975	63.8 mm (2.5 in)
1976	77.5 mm (3.1 in)
1977	43.7 mm (1.7 in)
1978	78.5 mm (3.1 in)
1979	68.1 mm (2.7 in)
1980	73.9 mm (2.9 in)
1981	92.7 mm (3.6 in)
1982	55.7 mm (2.2 in)
1983	57.7 mm (2.3 in)
1984	75.2 mm (3.0 in)
1985	126.0 mm (5.0 in)
1986	75.2 mm (3.0 in)
1987	67.5 mm (2.7 in)
1988	138.9 mm (5.5 in)
1989	96.5 mm (3.8 in)
1990	105.2 mm (4.1 in)
1991	71.5 mm (2.8 in)
1992	81.3 mm (3.2 in)
1993	84.3 mm (3.3 in)
1994	91.3 mm (3.6 in)
1995	155.0 mm (6.1 in)
1996	53.4 mm (2.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Merrill, 1951 to 1996. The record is 36 days in 1953, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Merrill by year
Year	Longest dry spell (CDD)
1951	16 days
1952	17 days
1953	36 days
1954	13 days
1955	21 days
1956	14 days
1957	20 days
1958	16 days
1959	16 days
1960	18 days
1961	15 days
1962	13 days
1963	27 days
1964	18 days
1965	13 days
1966	15 days
1967	18 days
1968	13 days
1969	13 days
1970	10 days
1971	15 days
1972	10 days
1973	12 days
1974	16 days
1975	12 days
1976	17 days
1977	13 days
1978	14 days
1979	9 days
1980	21 days
1981	14 days
1982	13 days
1983	13 days
1984	12 days
1985	15 days
1986	13 days
1987	13 days
1988	31 days
1989	11 days
1990	13 days
1991	25 days
1992	18 days
1993	17 days
1994	17 days
1995	29 days
1996	5 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.

Rainfall Return Levels

43 years, 1952 to 1995

A day with at least 50.0 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 128.6 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Merrill: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	50.0 mm (2.0 in)
5 years	65.7 mm (2.6 in)
10 years	77.9 mm (3.1 in)
25 years	95.9 mm (3.8 in)
50 years	111.3 mm (4.4 in)	Longer than the 43 years of record
100 years	128.6 mm (5.1 in)	Longer than the 43 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 43 years of values from 1952 to 1995.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 127.5 mm (5.0 in) in 1954; 106.7 mm (4.2 in) in 1995; 90.2 mm (3.6 in) in 1974.

Download the Data

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