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Built 2026-10-17 (17 October 2026)

Patuxent River Weather Records (USC00186915)

Record envelope, standing records and threshold days for Patuxent River (USC00186915), Maryland, United States, with 43 years of record.

Key Facts for Patuxent River

  • Patuxent River (USC00186915) is a weather station in Maryland, United States at 38.33 latitude and -76.42 longitude, 12 m (38 ft) above sea level.
  • The station reports from 1948 to 1990, 43 years of record.
  • 1,464 records set at Patuxent River still stand.
  • Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

  • Location: Maryland, United States, 38.33 latitude, -76.42 longitude.
  • Elevation: 12 m (38 ft).
  • Period of record: 1948 to 1990, 43 years.
  • Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Patuxent River, with 2026 drawn through them The band shows the record high and record low for each calendar day at Patuxent River. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Patuxent River. 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 Patuxent River, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan20.6 C (69.1 F)-19.4 C (-2.9 F)n/an/a
Feb27.2 C (81.0 F)-14.4 C (6.1 F)n/an/a
Mar31.1 C (88.0 F)-10.6 C (12.9 F)n/an/a
Apr33.3 C (91.9 F)-2.8 C (27.0 F)n/an/a
May33.9 C (93.0 F)3.3 C (37.9 F)n/an/a
Jun36.7 C (98.1 F)7.8 C (46.0 F)n/an/a
Jul39.4 C (102.9 F)13.3 C (55.9 F)n/an/a
Aug39.4 C (102.9 F)11.7 C (53.1 F)n/an/a
Sep37.2 C (99.0 F)7.2 C (45.0 F)n/an/a
Oct32.8 C (91.0 F)0.0 C (32.0 F)n/an/a
Nov28.3 C (82.9 F)-7.2 C (19.0 F)n/an/a
Dec25.0 C (77.0 F)-14.4 C (6.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Patuxent River by the year they were set 1,464 records at Patuxent River still stand. 1977 holds the most, with 127. 0501001501976: 1111977: 1271978: 871979: 1121980: 1021981: 861982: 1011983: 1091984: 1091985: 941986: 1191987: 931988: 1021989: 1091990: 319761978198019821984198619881990
1,464 records at Patuxent River still stand. 1977 holds the most, with 127.
Standing records at Patuxent River by the year they were set
Year setStanding records
1976111
1977127
197887
1979112
1980102
198186
1982101
1983109
1984109
198594
1986119
198793
1988102
1989109
19903

Wettest Day of Each Month

Jun: 150.1 mm (5.9 in)
Record daily precipitation for each month at Patuxent River The wettest day on record for each calendar month at Patuxent River. The most was 150.1 mm (5.9 in) on 20 June 1983. 050100150200 Jan: 43.7 mm (1.7 in), 17 January 1978 Jan Feb: 77.7 mm (3.1 in), 24 February 1979 Feb Mar: 67.6 mm (2.7 in), 13 March 1980 Mar Apr: 66.3 mm (2.6 in), 15 April 1983 Apr May: 109.5 mm (4.3 in), 29 May 1984 May Jun: 150.1 mm (5.9 in), 20 June 1983 Jun Jul: 112.0 mm (4.4 in), 16 July 1989 Jul Aug: 85.6 mm (3.4 in), 12 August 1984 Aug Sep: 81.5 mm (3.2 in), 5 September 1979 Sep Oct: 78.2 mm (3.1 in), 25 October 1980 Oct Nov: 69.9 mm (2.8 in), 30 November 1985 Nov Dec: 80.8 mm (3.2 in), 24 December 1986 Dec
The wettest day on record for each calendar month at Patuxent River. The most was 150.1 mm (5.9 in) on 20 June 1983.
Record daily precipitation for each month at Patuxent River
MonthRecord daily precipitation (mm)Date
Jan43.7 mm (1.7 in)17 January 1978
Feb77.7 mm (3.1 in)24 February 1979
Mar67.6 mm (2.7 in)13 March 1980
Apr66.3 mm (2.6 in)15 April 1983
May109.5 mm (4.3 in)29 May 1984
Jun150.1 mm (5.9 in)20 June 1983
Jul112.0 mm (4.4 in)16 July 1989
Aug85.6 mm (3.4 in)12 August 1984
Sep81.5 mm (3.2 in)5 September 1979
Oct78.2 mm (3.1 in)25 October 1980
Nov69.9 mm (2.8 in)30 November 1985
Dec80.8 mm (3.2 in)24 December 1986

Period of Record Coverage

1976 to 1990
Days with data per year at Patuxent River 15 years of record at Patuxent River, 1976 to 1990. 2 years have data for under 90 percent of days and are left out of rankings: 1976, 1990. 1976: 306 of 366 days1977: 365 of 365 days1978: 364 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 364 of 365 days1983: 363 of 365 days1984: 363 of 366 days1985: 333 of 365 days1986: 365 of 365 days1987: 363 of 365 days1988: 365 of 366 days1989: 365 of 365 days1990: 29 of 365 days198019851990
15 years of record at Patuxent River, 1976 to 1990. 2 years have data for under 90 percent of days and are left out of rankings: 1976, 1990.
Days with data per year at Patuxent River
YearDays with dataShare of yearComplete
197630684%No
1977365100%Yes
1978364100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982364100%Yes
198336399%Yes
198436399%Yes
198533391%Yes
1986365100%Yes
198736399%Yes
1988365100%Yes
1989365100%Yes
1990298%No

Latest Records

0

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

Climate Trend

12 complete years, 1977 to 1989
Annual mean temperature at Patuxent River as warming stripes, 1977 to 1989 One stripe for each of 12 complete years at Patuxent River, 1977 to 1989. Blue stripes are years cooler than the station's own mean of 13.8 C (56.8 F); red stripes are warmer. The coolest year was 1988, at 12.8 C (55.1 F), and the warmest was 1983, at 14.6 C (58.2 F). The strongest colour marks a difference of 1.0 C (1.8 F). 1977: 13.8 C, 0.0 C from the station mean1978: 13.1 C, -0.7 C from the station mean1979: 13.5 C, -0.3 C from the station mean1980: 14.0 C, +0.2 C from the station mean1981: 13.6 C, -0.2 C from the station mean1982: 14.0 C, +0.2 C from the station mean1983: 14.6 C, +0.8 C from the station mean1984: 14.2 C, +0.4 C from the station mean1986: 14.4 C, +0.6 C from the station mean1987: 13.8 C, 0.0 C from the station mean1988: 12.8 C, -1.0 C from the station mean1989: 13.8 C, 0.0 C from the station mean1977197819801982198419861988
One stripe for each of 12 complete years at Patuxent River, 1977 to 1989. Blue stripes are years cooler than the station's own mean of 13.8 C (56.8 F); red stripes are warmer. The coolest year was 1988, at 12.8 C (55.1 F), and the warmest was 1983, at 14.6 C (58.2 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Patuxent River as warming stripes, 1977 to 1989
YearAnnual mean temperatureDifference from the station mean
197713.8 C+0.02 C
197813.1 C-0.65 C
197913.5 C-0.30 C
198014.0 C+0.21 C
198113.6 C-0.19 C
198214.0 C+0.18 C
198314.6 C+0.76 C
198414.2 C+0.42 C
198614.4 C+0.58 C
198713.8 C-0.02 C
198812.8 C-0.98 C
198913.8 C-0.01 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

1948 to 1990
Yearly extremes at Patuxent River: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.4 C (102.9 F)198035.6 C (96.1 F)15
Coldest night (TNn)-19.4 C (-2.9 F)1977-14.4 C (6.1 F)15
Wettest day (Rx1day)150.1 mm (5.9 in)198370.2 mm (2.8 in)16
Wettest five days (Rx5day)217.9 mm (8.6 in)198497.3 mm (3.8 in)16
Longest dry spell (CDD)38 days197716 days16

Hottest day (TXx)

Hottest day (TXx) at Patuxent River by year The hottest day of the year at Patuxent River, 1948 to 1990. The record is 39.4 C (102.9 F) in 1980, marked on the chart; the median year is 35.6 C (96.1 F). 323436384019501960197019801990Record: 39.4 C (102.9 F) in 1980
The hottest day of the year at Patuxent River, 1948 to 1990. The record is 39.4 C (102.9 F) in 1980, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Patuxent River by year
YearHottest day (TXx)
1948n/a
197633.3 C (91.9 F)
197736.1 C (97.0 F)
197836.1 C (97.0 F)
197933.9 C (93.0 F)
198039.4 C (102.9 F)
198135.0 C (95.0 F)
198235.6 C (96.1 F)
198339.4 C (102.9 F)
198435.6 C (96.1 F)
198535.6 C (96.1 F)
198637.2 C (99.0 F)
198737.8 C (100.0 F)
198837.2 C (99.0 F)
198935.6 C (96.1 F)
199034.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Patuxent River by year The coldest night of the year at Patuxent River, 1948 to 1990. The record is -19.4 C (-2.9 F) in 1977, marked on the chart; the median year is -14.4 C (6.1 F). -20-100102019501960197019801990Record: -19.4 C (-2.9 F) in 1977
The coldest night of the year at Patuxent River, 1948 to 1990. The record is -19.4 C (-2.9 F) in 1977, marked on the chart; the median year is -14.4 C (6.1 F).
Coldest night (TNn) at Patuxent River by year
YearColdest night (TNn)
1948n/a
1976-8.9 C (16.0 F)
1977-19.4 C (-2.9 F)
1978-11.7 C (10.9 F)
1979-14.4 C (6.1 F)
1980-11.7 C (10.9 F)
1981-13.9 C (7.0 F)
1982-18.9 C (-2.0 F)
1983-14.4 C (6.1 F)
1984-15.0 C (5.0 F)
1985-18.9 C (-2.0 F)
1986-11.7 C (10.9 F)
1987-14.4 C (6.1 F)
1988-12.8 C (9.0 F)
1989-14.4 C (6.1 F)
199010.6 C (51.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Patuxent River by year The wettest day of the year at Patuxent River, 1948 to 1990. The record is 150.1 mm (5.9 in) in 1983, marked on the chart; the median year is 70.2 mm (2.8 in). 507510012515017519501960197019801990Record: 150.1 mm (5.9 in) in 1983
The wettest day of the year at Patuxent River, 1948 to 1990. The record is 150.1 mm (5.9 in) in 1983, marked on the chart; the median year is 70.2 mm (2.8 in).
Wettest day (Rx1day) at Patuxent River by year
YearWettest day (Rx1day)
194865.8 mm (2.6 in)
197655.4 mm (2.2 in)
197751.1 mm (2.0 in)
197856.6 mm (2.2 in)
197981.5 mm (3.2 in)
198078.2 mm (3.1 in)
198170.4 mm (2.8 in)
198266.0 mm (2.6 in)
1983150.1 mm (5.9 in)
1984109.5 mm (4.3 in)
198574.9 mm (2.9 in)
198680.8 mm (3.2 in)
198769.9 mm (2.8 in)
198854.4 mm (2.1 in)
1989112.0 mm (4.4 in)
199060.2 mm (2.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Patuxent River by year The wettest five days of the year at Patuxent River, 1948 to 1990. The record is 217.9 mm (8.6 in) in 1984, marked on the chart; the median year is 97.3 mm (3.8 in). 5010015020025019501960197019801990Record: 217.9 mm (8.6 in) in 1984
The wettest five days of the year at Patuxent River, 1948 to 1990. The record is 217.9 mm (8.6 in) in 1984, marked on the chart; the median year is 97.3 mm (3.8 in).
Wettest five days (Rx5day) at Patuxent River by year
YearWettest five days (Rx5day)
1948100.6 mm (4.0 in)
197676.0 mm (3.0 in)
197770.1 mm (2.8 in)
197885.6 mm (3.4 in)
1979117.6 mm (4.6 in)
198083.6 mm (3.3 in)
198179.1 mm (3.1 in)
1982125.2 mm (4.9 in)
1983175.7 mm (6.9 in)
1984217.9 mm (8.6 in)
1985137.6 mm (5.4 in)
198694.0 mm (3.7 in)
1987114.3 mm (4.5 in)
198872.4 mm (2.9 in)
1989121.2 mm (4.8 in)
199073.7 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Patuxent River by year The longest dry spell of the year at Patuxent River, 1948 to 1990. The record is 38 days in 1977, marked on the chart; the median year is 16 days. 01020304019501960197019801990Record: 38 days in 1977
The longest dry spell of the year at Patuxent River, 1948 to 1990. The record is 38 days in 1977, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Patuxent River by year
YearLongest dry spell (CDD)
194816 days
197620 days
197738 days
197833 days
197912 days
198016 days
198116 days
198227 days
198311 days
198420 days
198522 days
198634 days
198716 days
198815 days
198915 days
19905 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 Patuxent River standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Patuxent River 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 . Last revised (2025-12-31).