Charlotte Hall Weather Records (USC00181685)
Record envelope, standing records and threshold days for Charlotte Hall (USC00181685), Maryland, United States, with 69 years of record.
Key Facts for Charlotte Hall
- Charlotte Hall (USC00181685) is a weather station in Maryland, United States at 38.47 latitude and -76.75 longitude, 52 m (171 ft) above sea level.
- The station reports from 1893 to 1961, 69 years of record.
- 1,464 records set at Charlotte Hall still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Charlotte Hall set a daily record low minimum temperature of 6.1 C (43.0 F) on 30 May 1961.
About the Station
- Location: Maryland, United States, 38.47 latitude, -76.75 longitude.
- Elevation: 52 m (171 ft).
- Period of record: 1893 to 1961, 69 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 25.6 C (78.1 F) | -18.9 C (-2.0 F) | n/a | n/a |
| Feb | 27.8 C (82.0 F) | -28.3 C (-18.9 F) | n/a | n/a |
| Mar | 31.1 C (88.0 F) | -13.3 C (8.1 F) | n/a | n/a |
| Apr | 36.1 C (97.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| May | 35.6 C (96.1 F) | -1.7 C (28.9 F) | n/a | n/a |
| Jun | 37.8 C (100.0 F) | 4.4 C (39.9 F) | n/a | n/a |
| Jul | 38.9 C (102.0 F) | 5.6 C (42.1 F) | n/a | n/a |
| Aug | 38.9 C (102.0 F) | 7.2 C (45.0 F) | n/a | n/a |
| Sep | 37.8 C (100.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Oct | 35.0 C (95.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Nov | 28.9 C (84.0 F) | -12.2 C (10.0 F) | n/a | n/a |
| Dec | 23.9 C (75.0 F) | -20.0 C (-4.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 27 |
| 1894 | 50 |
| 1895 | 89 |
| 1896 | 79 |
| 1897 | 31 |
| 1898 | 59 |
| 1899 | 37 |
| 1900 | 74 |
| 1901 | 35 |
| 1902 | 17 |
| 1903 | 35 |
| 1904 | 21 |
| 1905 | 14 |
| 1906 | 3 |
| 1938 | 19 |
| 1939 | 43 |
| 1940 | 53 |
| 1941 | 41 |
| 1942 | 44 |
| 1943 | 43 |
| 1944 | 19 |
| 1945 | 45 |
| 1946 | 47 |
| 1947 | 44 |
| 1948 | 41 |
| 1949 | 35 |
| 1950 | 56 |
| 1951 | 30 |
| 1952 | 27 |
| 1953 | 22 |
| 1954 | 44 |
| 1955 | 27 |
| 1956 | 48 |
| 1957 | 39 |
| 1958 | 28 |
| 1959 | 32 |
| 1960 | 37 |
| 1961 | 29 |
Wettest Day of Each Month
Sep: 158.5 mm (6.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 61.0 mm (2.4 in) | 13 January 1948 |
| Feb | 76.2 mm (3.0 in) | 13 February 1899 |
| Mar | 51.8 mm (2.0 in) | 3 March 1942 |
| Apr | 93.2 mm (3.7 in) | 8 April 1895 |
| May | 82.6 mm (3.3 in) | 7 May 1949 |
| Jun | 68.6 mm (2.7 in) | 11 June 1945 |
| Jul | 86.4 mm (3.4 in) | 14 July 1937 |
| Aug | 124.0 mm (4.9 in) | 25 August 1958 |
| Sep | 158.5 mm (6.2 in) | 10 September 1950 |
| Oct | 107.2 mm (4.2 in) | 29 October 1953 |
| Nov | 92.7 mm (3.6 in) | 13 November 1937 |
| Dec | 66.0 mm (2.6 in) | 14 December 1941 |
Period of Record Coverage
1893 to 1961| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 122 | 33% | No |
| 1894 | 323 | 88% | No |
| 1895 | 350 | 96% | Yes |
| 1896 | 329 | 90% | No |
| 1897 | 360 | 99% | Yes |
| 1898 | 355 | 97% | Yes |
| 1899 | 237 | 65% | No |
| 1900 | 331 | 91% | Yes |
| 1901 | 219 | 60% | No |
| 1902 | 142 | 39% | No |
| 1903 | 162 | 44% | No |
| 1904 | 122 | 33% | No |
| 1905 | 82 | 22% | No |
| 1906 | 35 | 10% | No |
| 1938 | 184 | 50% | No |
| 1939 | 364 | 100% | Yes |
| 1940 | 315 | 86% | No |
| 1941 | 265 | 73% | No |
| 1942 | 363 | 99% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 359 | 98% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 357 | 98% | Yes |
| 1948 | 362 | 99% | Yes |
| 1949 | 357 | 98% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 362 | 99% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 358 | 98% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 356 | 98% | Yes |
| 1958 | 334 | 92% | Yes |
| 1959 | 304 | 83% | No |
| 1960 | 301 | 82% | No |
| 1961 | 143 | 39% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 30 May 1961 | Charlotte Hall, US | daily low min | 6.1 C (43.0 F) | 1.1 C (2.0 F) | 15 years | 12 of 100 (Routine) |
| 28 May 1961 | Charlotte Hall, US | daily low min | 2.2 C (36.0 F) | 3.4 C (6.1 F) | 65 years | 32 of 100 (Routine) |
| 27 May 1961 | Charlotte Hall, US | daily low min | 2.8 C (37.0 F) | 2.8 C (5.0 F) | 12 years | 15 of 100 (Routine) |
| 23 May 1961 | Charlotte Hall, US | daily low min | 3.3 C (37.9 F) | 3.4 C (6.1 F) | 65 years | 32 of 100 (Routine) |
| 23 May 1961 | Charlotte Hall, US | daily low max (Tie) | 20.0 C (68.0 F) | tie | 61 years | 6 of 100 (Routine) |
| 20 May 1961 | Charlotte Hall, US | daily low min | 4.4 C (39.9 F) | 1.7 C (3.1 F) | 16 years | 13 of 100 (Routine) |
| 11 May 1961 | Charlotte Hall, US | daily rain | 38.4 mm (1.5 in) | 24.7 mm (1.0 in) | 12 years | 31 of 100 (Routine) |
| 4 May 1961 | Charlotte Hall, US | daily low min | 1.1 C (34.0 F) | 1.1 C (2.0 F) | 4 years | 9 of 100 (Routine) |
| 2 May 1961 | Charlotte Hall, US | daily rain | 13.7 mm (0.5 in) | 2.3 mm (0.09 in) | 59 years | 20 of 100 (Routine) |
| 30 April 1961 | Charlotte Hall, US | daily low min | -1.7 C (28.9 F) | 6.1 C (11.0 F) | 66 years | 38 of 100 (Notable) |
| 29 April 1961 | Charlotte Hall, US | daily low min (Tie) | 1.1 C (34.0 F) | tie | 60 years | 6 of 100 (Routine) |
| 27 April 1961 | Charlotte Hall, US | daily low min | 1.7 C (35.1 F) | 1.6 C (2.9 F) | 60 years | 27 of 100 (Routine) |
| 17 April 1961 | Charlotte Hall, US | daily low min | 0.0 C (32.0 F) | 0.6 C (1.1 F) | 60 years | 25 of 100 (Routine) |
| 13 April 1961 | Charlotte Hall, US | daily rain | 39.6 mm (1.6 in) | 8.9 mm (0.35 in) | 62 years | 31 of 100 (Routine) |
| 9 April 1961 | Charlotte Hall, US | daily low max | 10.0 C (50.0 F) | 1.7 C (3.1 F) | 66 years | 28 of 100 (Routine) |
| 22 March 1961 | Charlotte Hall, US | daily rain | 31.0 mm (1.2 in) | 21.1 mm (0.8 in) | 19 years | 33 of 100 (Routine) |
| 18 March 1961 | Charlotte Hall, US | daily low max | 3.9 C (39.0 F) | 1.1 C (2.0 F) | 4 years | 8 of 100 (Routine) |
| 8 March 1961 | Charlotte Hall, US | daily rain | 26.9 mm (1.1 in) | 5.3 mm (0.21 in) | 65 years | 30 of 100 (Routine) |
| 7 March 1961 | Charlotte Hall, US | daily high max | 24.4 C (75.9 F) | 0.5 C (0.9 F) | 15 years | 10 of 100 (Routine) |
| 6 March 1961 | Charlotte Hall, US | daily high max | 27.2 C (81.0 F) | 2.2 C (4.0 F) | 15 years | 13 of 100 (Routine) |
Climate Trend
20 complete years, 1895 to 1957| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1895 | 12.5 C | -1.14 C |
| 1897 | 13.4 C | -0.25 C |
| 1898 | 13.6 C | -0.07 C |
| 1939 | 14.1 C | +0.45 C |
| 1942 | 13.6 C | -0.03 C |
| 1943 | 13.8 C | +0.12 C |
| 1944 | 13.7 C | 0.00 C |
| 1945 | 13.7 C | 0.00 C |
| 1946 | 14.0 C | +0.38 C |
| 1947 | 13.0 C | -0.66 C |
| 1948 | 13.5 C | -0.15 C |
| 1949 | 14.8 C | +1.13 C |
| 1950 | 13.6 C | -0.06 C |
| 1951 | 13.6 C | -0.02 C |
| 1952 | 13.9 C | +0.25 C |
| 1953 | 14.3 C | +0.67 C |
| 1954 | 14.0 C | +0.39 C |
| 1955 | 13.3 C | -0.31 C |
| 1956 | 13.1 C | -0.57 C |
| 1957 | 13.6 C | -0.06 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
1893 to 1961| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.9 C (102.0 F) | 1898 | 36.1 C (97.0 F) | 38 |
| Coldest night (TNn) | -28.3 C (-18.9 F) | 1899 | -14.7 C (5.5 F) | 38 |
| Wettest day (Rx1day) | 158.5 mm (6.2 in) | 1950 | 65.4 mm (2.6 in) | 40 |
| Wettest five days (Rx5day) | 225.6 mm (8.9 in) | 1955 | 96.9 mm (3.8 in) | 40 |
| Longest dry spell (CDD) | 29 days | 1940 | 17 days | 40 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 37.8 C (100.0 F) |
| 1894 | 37.2 C (99.0 F) |
| 1895 | 37.8 C (100.0 F) |
| 1896 | 36.7 C (98.1 F) |
| 1897 | 33.3 C (91.9 F) |
| 1898 | 38.9 C (102.0 F) |
| 1899 | 36.1 C (97.0 F) |
| 1900 | 38.9 C (102.0 F) |
| 1901 | 31.1 C (88.0 F) |
| 1902 | 37.8 C (100.0 F) |
| 1903 | 35.0 C (95.0 F) |
| 1904 | 32.8 C (91.0 F) |
| 1905 | 32.8 C (91.0 F) |
| 1906 | 20.0 C (68.0 F) |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | 35.0 C (95.0 F) |
| 1939 | 35.6 C (96.1 F) |
| 1940 | 37.2 C (99.0 F) |
| 1941 | 36.7 C (98.1 F) |
| 1942 | 36.1 C (97.0 F) |
| 1943 | 38.3 C (100.9 F) |
| 1944 | 36.1 C (97.0 F) |
| 1945 | 35.6 C (96.1 F) |
| 1946 | 35.6 C (96.1 F) |
| 1947 | 36.1 C (97.0 F) |
| 1948 | 35.6 C (96.1 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 35.0 C (95.0 F) |
| 1952 | 36.7 C (98.1 F) |
| 1953 | 37.2 C (99.0 F) |
| 1954 | 38.3 C (100.9 F) |
| 1955 | 36.1 C (97.0 F) |
| 1956 | 34.4 C (93.9 F) |
| 1957 | 37.2 C (99.0 F) |
| 1958 | 33.3 C (91.9 F) |
| 1959 | 36.7 C (98.1 F) |
| 1960 | 33.9 C (93.0 F) |
| 1961 | 30.6 C (87.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | -15.0 C (5.0 F) |
| 1894 | -13.9 C (7.0 F) |
| 1895 | -20.6 C (-5.1 F) |
| 1896 | -15.0 C (5.0 F) |
| 1897 | -15.0 C (5.0 F) |
| 1898 | -16.7 C (1.9 F) |
| 1899 | -28.3 C (-18.9 F) |
| 1900 | -16.1 C (3.0 F) |
| 1901 | -16.7 C (1.9 F) |
| 1902 | -17.2 C (1.0 F) |
| 1903 | -12.8 C (9.0 F) |
| 1904 | -20.0 C (-4.0 F) |
| 1905 | -10.6 C (12.9 F) |
| 1906 | -13.9 C (7.0 F) |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | -10.6 C (12.9 F) |
| 1939 | -11.1 C (12.0 F) |
| 1940 | -15.6 C (3.9 F) |
| 1941 | -10.0 C (14.0 F) |
| 1942 | -20.0 C (-4.0 F) |
| 1943 | -12.8 C (9.0 F) |
| 1944 | -10.0 C (14.0 F) |
| 1945 | -13.9 C (7.0 F) |
| 1946 | -14.4 C (6.1 F) |
| 1947 | -15.0 C (5.0 F) |
| 1948 | -16.1 C (3.0 F) |
| 1949 | -8.3 C (17.1 F) |
| 1950 | -12.2 C (10.0 F) |
| 1951 | -14.4 C (6.1 F) |
| 1952 | -11.7 C (10.9 F) |
| 1953 | -11.7 C (10.9 F) |
| 1954 | -13.9 C (7.0 F) |
| 1955 | -14.4 C (6.1 F) |
| 1956 | -12.2 C (10.0 F) |
| 1957 | -16.1 C (3.0 F) |
| 1958 | -16.1 C (3.0 F) |
| 1959 | -15.0 C (5.0 F) |
| 1960 | -16.1 C (3.0 F) |
| 1961 | -18.9 C (-2.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 51.3 mm (2.0 in) |
| 1894 | 50.3 mm (2.0 in) |
| 1895 | 93.2 mm (3.7 in) |
| 1896 | 50.3 mm (2.0 in) |
| 1897 | 55.9 mm (2.2 in) |
| 1898 | 50.3 mm (2.0 in) |
| 1899 | 76.2 mm (3.0 in) |
| 1900 | 69.1 mm (2.7 in) |
| 1901 | 63.5 mm (2.5 in) |
| 1902 | 41.1 mm (1.6 in) |
| 1903 | 32.8 mm (1.3 in) |
| 1904 | 38.1 mm (1.5 in) |
| 1905 | 20.8 mm (0.8 in) |
| 1906 | 22.1 mm (0.9 in) |
| 1936 | 31.5 mm (1.2 in) |
| 1937 | 92.7 mm (3.6 in) |
| 1938 | 64.8 mm (2.6 in) |
| 1939 | 101.1 mm (4.0 in) |
| 1940 | 64.8 mm (2.6 in) |
| 1941 | 66.0 mm (2.6 in) |
| 1942 | 68.1 mm (2.7 in) |
| 1943 | 100.3 mm (3.9 in) |
| 1944 | 111.8 mm (4.4 in) |
| 1945 | 85.3 mm (3.4 in) |
| 1946 | 76.2 mm (3.0 in) |
| 1947 | 50.3 mm (2.0 in) |
| 1948 | 79.2 mm (3.1 in) |
| 1949 | 82.6 mm (3.3 in) |
| 1950 | 158.5 mm (6.2 in) |
| 1951 | 50.8 mm (2.0 in) |
| 1952 | 101.6 mm (4.0 in) |
| 1953 | 107.2 mm (4.2 in) |
| 1954 | 30.5 mm (1.2 in) |
| 1955 | 116.3 mm (4.6 in) |
| 1956 | 55.4 mm (2.2 in) |
| 1957 | 71.6 mm (2.8 in) |
| 1958 | 124.0 mm (4.9 in) |
| 1959 | 42.2 mm (1.7 in) |
| 1960 | 104.1 mm (4.1 in) |
| 1961 | 50.8 mm (2.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 51.3 mm (2.0 in) |
| 1894 | 50.3 mm (2.0 in) |
| 1895 | 93.2 mm (3.7 in) |
| 1896 | 99.8 mm (3.9 in) |
| 1897 | 99.1 mm (3.9 in) |
| 1898 | 91.2 mm (3.6 in) |
| 1899 | 104.2 mm (4.1 in) |
| 1900 | 102.1 mm (4.0 in) |
| 1901 | 73.4 mm (2.9 in) |
| 1902 | 56.4 mm (2.2 in) |
| 1903 | 81.0 mm (3.2 in) |
| 1904 | 66.6 mm (2.6 in) |
| 1905 | 20.8 mm (0.8 in) |
| 1906 | 24.6 mm (1.0 in) |
| 1936 | 50.1 mm (2.0 in) |
| 1937 | 115.1 mm (4.5 in) |
| 1938 | 160.1 mm (6.3 in) |
| 1939 | 101.1 mm (4.0 in) |
| 1940 | 79.3 mm (3.1 in) |
| 1941 | 73.7 mm (2.9 in) |
| 1942 | 139.7 mm (5.5 in) |
| 1943 | 174.2 mm (6.9 in) |
| 1944 | 124.2 mm (4.9 in) |
| 1945 | 223.2 mm (8.8 in) |
| 1946 | 109.2 mm (4.3 in) |
| 1947 | 94.3 mm (3.7 in) |
| 1948 | 180.9 mm (7.1 in) |
| 1949 | 111.8 mm (4.4 in) |
| 1950 | 221.3 mm (8.7 in) |
| 1951 | 79.2 mm (3.1 in) |
| 1952 | 117.5 mm (4.6 in) |
| 1953 | 121.6 mm (4.8 in) |
| 1954 | 61.0 mm (2.4 in) |
| 1955 | 225.6 mm (8.9 in) |
| 1956 | 94.7 mm (3.7 in) |
| 1957 | 83.5 mm (3.3 in) |
| 1958 | 160.3 mm (6.3 in) |
| 1959 | 78.2 mm (3.1 in) |
| 1960 | 127.2 mm (5.0 in) |
| 1961 | 66.2 mm (2.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 18 days |
| 1894 | 20 days |
| 1895 | 17 days |
| 1896 | 28 days |
| 1897 | 23 days |
| 1898 | 17 days |
| 1899 | 22 days |
| 1900 | 17 days |
| 1901 | 28 days |
| 1902 | 17 days |
| 1903 | 19 days |
| 1904 | 17 days |
| 1905 | 12 days |
| 1906 | 10 days |
| 1936 | 18 days |
| 1937 | 17 days |
| 1938 | 12 days |
| 1939 | 13 days |
| 1940 | 29 days |
| 1941 | 27 days |
| 1942 | 23 days |
| 1943 | 17 days |
| 1944 | 23 days |
| 1945 | 17 days |
| 1946 | 20 days |
| 1947 | 16 days |
| 1948 | 15 days |
| 1949 | 18 days |
| 1950 | 14 days |
| 1951 | 11 days |
| 1952 | 22 days |
| 1953 | 19 days |
| 1954 | 16 days |
| 1955 | 16 days |
| 1956 | 16 days |
| 1957 | 16 days |
| 1958 | 17 days |
| 1959 | 25 days |
| 1960 | 13 days |
| 1961 | 14 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 frostAcross 20 years with a frost, the median last spring frost at Charlotte Hall falls on 16 April and the median first autumn frost on 20 October, which leaves a median of 193 days between them.
| Measure | Median, all years | Earliest period | Recent period (1895 to 1957) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 16 April | n/a | 16 April | n/a | n/a |
| First autumn frost | 20 October | n/a | 20 October | n/a | n/a |
| Growing days | 193 days | n/a | 193 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
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).