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
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Charlotte Hall. 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 Charlotte Hall, with 2026 drawn through them
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 with most
1,464 records at Charlotte Hall still stand. 1895 holds the most, with 89.
Standing records at Charlotte Hall by the year they were set
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)
The wettest day on record for each calendar month at Charlotte Hall. The most was 158.5 mm (6.2 in) on 10 September 1950.
Record daily precipitation for each month at Charlotte Hall
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
Complete yearUnder 90 percent of days
38 years of record at Charlotte Hall, 1893 to 1961. 16 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1896, 1899, 1901, 1902, 1903, 1904 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 20 complete years at Charlotte Hall, 1895 to 1957. Blue stripes are years cooler than the station's own mean of 13.7 C (56.6 F); red stripes are warmer. The coolest year was 1895, at 12.5 C (54.5 F), and the warmest was 1949, at 14.8 C (58.6 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Charlotte Hall as warming stripes, 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
Yearly extremes at Charlotte Hall: the record and the median year
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)
The hottest day of the year at Charlotte Hall, 1893 to 1961. The record is 38.9 C (102.0 F) in 1898, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Charlotte Hall by year
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)
The coldest night of the year at Charlotte Hall, 1893 to 1961. The record is -28.3 C (-18.9 F) in 1899, marked on the chart; the median year is -14.7 C (5.5 F).
Coldest night (TNn) at Charlotte Hall by year
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)
The wettest day of the year at Charlotte Hall, 1893 to 1961. The record is 158.5 mm (6.2 in) in 1950, marked on the chart; the median year is 65.4 mm (2.6 in).
Wettest day (Rx1day) at Charlotte Hall by year
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)
The wettest five days of the year at Charlotte Hall, 1893 to 1961. The record is 225.6 mm (8.9 in) in 1955, marked on the chart; the median year is 96.9 mm (3.8 in).
Wettest five days (Rx5day) at Charlotte Hall by year
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)
The longest dry spell of the year at Charlotte Hall, 1893 to 1961. The record is 29 days in 1940, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Charlotte Hall by year
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 frost
Across 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.
Frost dates and growing season at Charlotte Hall
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
Data for Charlotte Hall standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Charlotte Hall 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.