Record envelope, standing records and threshold days for State Sanatorium (USC00188510), Maryland, United States, with 39 years of record.
Key Facts for State Sanatorium
State Sanatorium (USC00188510) is a weather station in Maryland, United States at 39.72 latitude and -77.45 longitude, 445 m (1,460 ft) above sea level.
The station reports from 1909 to 1947, 39 years of record.
1,464 records set at State Sanatorium still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
State Sanatorium set a daily record precipitation of 20.8 mm (0.8 in) on 24 November 1947.
About the Station
Location: Maryland, United States, 39.72 latitude, -77.45 longitude.
Elevation: 445 m (1,460 ft).
Period of record: 1909 to 1947, 39 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 State Sanatorium. 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 State Sanatorium, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
22.2 C (72.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-25.6 C (-14.1 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-16.7 C (1.9 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-13.9 C (7.0 F)
n/a
n/a
May
33.9 C (93.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
36.1 C (97.0 F)
2.8 C (37.0 F)
n/a
n/a
Jul
38.9 C (102.0 F)
7.2 C (45.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
4.4 C (39.9 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-1.7 C (28.9 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-5.6 C (21.9 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-16.1 C (3.0 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at State Sanatorium still stand. 1914 holds the most, with 90.
Standing records at State Sanatorium by the year they were set
Year set
Standing records
1909
31
1910
55
1911
50
1912
45
1913
42
1914
90
1915
29
1916
32
1917
49
1918
42
1919
25
1920
26
1921
24
1922
23
1923
31
1924
29
1925
56
1926
38
1927
35
1928
35
1929
50
1930
66
1931
43
1932
48
1933
45
1934
34
1935
29
1936
48
1937
20
1938
30
1939
24
1940
35
1941
40
1942
26
1943
21
1944
19
1945
43
1946
23
1947
33
Wettest Day of Each Month
Apr: 147.3 mm (5.8 in)
The wettest day on record for each calendar month at State Sanatorium. The most was 147.3 mm (5.8 in) on 26 April 1937.
Record daily precipitation for each month at State Sanatorium
Month
Record daily precipitation (mm)
Date
Jan
69.1 mm (2.7 in)
4 January 1944
Feb
73.7 mm (2.9 in)
22 February 1937
Mar
102.9 mm (4.1 in)
27 March 1913
Apr
147.3 mm (5.8 in)
26 April 1937
May
77.0 mm (3.0 in)
27 May 1946
Jun
88.9 mm (3.5 in)
2 June 1915
Jul
92.5 mm (3.6 in)
27 July 1939
Aug
104.1 mm (4.1 in)
24 August 1933
Sep
137.2 mm (5.4 in)
30 September 1924
Oct
103.1 mm (4.1 in)
22 October 1929
Nov
67.8 mm (2.7 in)
13 November 1937
Dec
85.1 mm (3.4 in)
1 December 1934
Period of Record Coverage
1909 to 1947
Complete yearUnder 90 percent of days
39 years of record at State Sanatorium, 1909 to 1947. 7 years have data for under 90 percent of days and are left out of rankings: 1909, 1919, 1921, 1926, 1927, 1940, 1947.
Cooler than the station meanWarmer than the station mean
One stripe for each of 24 complete years at State Sanatorium, 1910 to 1945. Blue stripes are years cooler than the station's own mean of 11.4 C (52.4 F); red stripes are warmer. The coolest year was 1917, at 9.5 C (49.2 F), and the warmest was 1931, at 12.8 C (55.0 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at State Sanatorium as warming stripes, 1910 to 1945
Year
Annual mean temperature
Difference from the station mean
1910
10.9 C
-0.47 C
1911
11.7 C
+0.36 C
1913
12.1 C
+0.77 C
1914
11.8 C
+0.47 C
1915
10.6 C
-0.78 C
1917
9.5 C
-1.81 C
1918
11.1 C
-0.23 C
1920
10.2 C
-1.19 C
1922
11.8 C
+0.43 C
1924
10.1 C
-1.24 C
1928
11.1 C
-0.26 C
1929
11.4 C
+0.01 C
1930
12.3 C
+0.90 C
1931
12.8 C
+1.44 C
1932
12.1 C
+0.74 C
1933
11.8 C
+0.42 C
1934
11.3 C
-0.05 C
1935
11.0 C
-0.37 C
1938
12.0 C
+0.68 C
1939
11.9 C
+0.59 C
1942
11.3 C
-0.02 C
1943
11.3 C
-0.08 C
1944
11.4 C
+0.03 C
1945
11.1 C
-0.24 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
1909 to 1947
Yearly extremes at State Sanatorium: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1930
34.4 C (93.9 F)
39
Coldest night (TNn)
-25.6 C (-14.1 F)
1934
-17.8 C (0.0 F)
39
Wettest day (Rx1day)
147.3 mm (5.8 in)
1937
69.9 mm (2.8 in)
39
Wettest five days (Rx5day)
199.7 mm (7.9 in)
1933
102.9 mm (4.1 in)
39
Longest dry spell (CDD)
28 days
1917
18 days
39
Hottest day (TXx)
The hottest day of the year at State Sanatorium, 1909 to 1947. The record is 40.0 C (104.0 F) in 1930, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at State Sanatorium by year
Year
Hottest day (TXx)
1909
33.9 C (93.0 F)
1910
32.8 C (91.0 F)
1911
36.1 C (97.0 F)
1912
33.3 C (91.9 F)
1913
35.6 C (96.1 F)
1914
35.0 C (95.0 F)
1915
32.8 C (91.0 F)
1916
34.4 C (93.9 F)
1917
35.0 C (95.0 F)
1918
38.3 C (100.9 F)
1919
34.4 C (93.9 F)
1920
31.7 C (89.1 F)
1921
35.0 C (95.0 F)
1922
31.7 C (89.1 F)
1923
35.6 C (96.1 F)
1924
34.4 C (93.9 F)
1925
36.1 C (97.0 F)
1926
36.7 C (98.1 F)
1927
33.9 C (93.0 F)
1928
32.8 C (91.0 F)
1929
33.9 C (93.0 F)
1930
40.0 C (104.0 F)
1931
36.7 C (98.1 F)
1932
35.6 C (96.1 F)
1933
36.1 C (97.0 F)
1934
36.1 C (97.0 F)
1935
34.4 C (93.9 F)
1936
38.9 C (102.0 F)
1937
33.9 C (93.0 F)
1938
35.0 C (95.0 F)
1939
33.3 C (91.9 F)
1940
32.2 C (90.0 F)
1941
36.1 C (97.0 F)
1942
33.9 C (93.0 F)
1943
33.9 C (93.0 F)
1944
35.0 C (95.0 F)
1945
34.4 C (93.9 F)
1946
31.7 C (89.1 F)
1947
31.1 C (88.0 F)
Coldest night (TNn)
The coldest night of the year at State Sanatorium, 1909 to 1947. The record is -25.6 C (-14.1 F) in 1934, marked on the chart; the median year is -17.8 C (0.0 F).
Coldest night (TNn) at State Sanatorium by year
Year
Coldest night (TNn)
1909
-17.8 C (0.0 F)
1910
-15.6 C (3.9 F)
1911
-15.0 C (5.0 F)
1912
-21.7 C (-7.1 F)
1913
-15.0 C (5.0 F)
1914
-20.0 C (-4.0 F)
1915
-13.9 C (7.0 F)
1916
-18.9 C (-2.0 F)
1917
-22.8 C (-9.0 F)
1918
-23.3 C (-9.9 F)
1919
-17.8 C (0.0 F)
1920
-17.8 C (0.0 F)
1921
-16.7 C (1.9 F)
1922
-17.2 C (1.0 F)
1923
-17.2 C (1.0 F)
1924
-17.8 C (0.0 F)
1925
-18.9 C (-2.0 F)
1926
-18.9 C (-2.0 F)
1927
-16.1 C (3.0 F)
1928
-16.1 C (3.0 F)
1929
-17.8 C (0.0 F)
1930
-18.3 C (-0.9 F)
1931
-11.7 C (10.9 F)
1932
-15.0 C (5.0 F)
1933
-17.8 C (0.0 F)
1934
-25.6 C (-14.1 F)
1935
-23.3 C (-9.9 F)
1936
-24.4 C (-11.9 F)
1937
-12.2 C (10.0 F)
1938
-12.2 C (10.0 F)
1939
-13.9 C (7.0 F)
1940
-19.4 C (-2.9 F)
1941
-14.4 C (6.1 F)
1942
-20.6 C (-5.1 F)
1943
-19.4 C (-2.9 F)
1944
-14.4 C (6.1 F)
1945
-18.3 C (-0.9 F)
1946
-14.4 C (6.1 F)
1947
-18.9 C (-2.0 F)
Wettest day (Rx1day)
The wettest day of the year at State Sanatorium, 1909 to 1947. The record is 147.3 mm (5.8 in) in 1937, marked on the chart; the median year is 69.9 mm (2.8 in).
Wettest day (Rx1day) at State Sanatorium by year
Year
Wettest day (Rx1day)
1909
62.5 mm (2.5 in)
1910
49.0 mm (1.9 in)
1911
95.5 mm (3.8 in)
1912
104.1 mm (4.1 in)
1913
102.9 mm (4.1 in)
1914
101.6 mm (4.0 in)
1915
88.9 mm (3.5 in)
1916
69.9 mm (2.8 in)
1917
63.5 mm (2.5 in)
1918
58.4 mm (2.3 in)
1919
50.8 mm (2.0 in)
1920
45.7 mm (1.8 in)
1921
63.5 mm (2.5 in)
1922
54.6 mm (2.1 in)
1923
76.2 mm (3.0 in)
1924
137.2 mm (5.4 in)
1925
48.8 mm (1.9 in)
1926
59.4 mm (2.3 in)
1927
76.2 mm (3.0 in)
1928
69.3 mm (2.7 in)
1929
103.1 mm (4.1 in)
1930
71.6 mm (2.8 in)
1931
47.2 mm (1.9 in)
1932
101.6 mm (4.0 in)
1933
104.1 mm (4.1 in)
1934
85.1 mm (3.4 in)
1935
78.7 mm (3.1 in)
1936
71.9 mm (2.8 in)
1937
147.3 mm (5.8 in)
1938
49.5 mm (1.9 in)
1939
92.5 mm (3.6 in)
1940
50.8 mm (2.0 in)
1941
53.3 mm (2.1 in)
1942
76.2 mm (3.0 in)
1943
57.9 mm (2.3 in)
1944
69.1 mm (2.7 in)
1945
62.2 mm (2.4 in)
1946
77.0 mm (3.0 in)
1947
69.9 mm (2.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at State Sanatorium, 1909 to 1947. The record is 199.7 mm (7.9 in) in 1933, marked on the chart; the median year is 102.9 mm (4.1 in).
Wettest five days (Rx5day) at State Sanatorium by year
Year
Wettest five days (Rx5day)
1909
69.1 mm (2.7 in)
1910
73.6 mm (2.9 in)
1911
186.5 mm (7.3 in)
1912
180.7 mm (7.1 in)
1913
120.9 mm (4.8 in)
1914
101.6 mm (4.0 in)
1915
178.1 mm (7.0 in)
1916
163.9 mm (6.5 in)
1917
87.4 mm (3.4 in)
1918
60.4 mm (2.4 in)
1919
76.2 mm (3.0 in)
1920
101.6 mm (4.0 in)
1921
106.7 mm (4.2 in)
1922
139.7 mm (5.5 in)
1923
104.3 mm (4.1 in)
1924
137.2 mm (5.4 in)
1925
75.0 mm (3.0 in)
1926
100.8 mm (4.0 in)
1927
142.3 mm (5.6 in)
1928
136.1 mm (5.4 in)
1929
167.1 mm (6.6 in)
1930
78.8 mm (3.1 in)
1931
93.0 mm (3.7 in)
1932
181.9 mm (7.2 in)
1933
199.7 mm (7.9 in)
1934
147.3 mm (5.8 in)
1935
88.4 mm (3.5 in)
1936
87.7 mm (3.5 in)
1937
195.6 mm (7.7 in)
1938
72.9 mm (2.9 in)
1939
102.9 mm (4.1 in)
1940
91.0 mm (3.6 in)
1941
68.6 mm (2.7 in)
1942
158.0 mm (6.2 in)
1943
82.5 mm (3.2 in)
1944
76.7 mm (3.0 in)
1945
113.0 mm (4.4 in)
1946
103.2 mm (4.1 in)
1947
80.1 mm (3.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at State Sanatorium, 1909 to 1947. The record is 28 days in 1917, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at State Sanatorium by year
Year
Longest dry spell (CDD)
1909
24 days
1910
22 days
1911
21 days
1912
16 days
1913
16 days
1914
13 days
1915
21 days
1916
12 days
1917
28 days
1918
20 days
1919
19 days
1920
26 days
1921
18 days
1922
24 days
1923
21 days
1924
28 days
1925
22 days
1926
10 days
1927
15 days
1928
13 days
1929
17 days
1930
25 days
1931
19 days
1932
22 days
1933
12 days
1934
17 days
1935
15 days
1936
16 days
1937
15 days
1938
14 days
1939
17 days
1940
12 days
1941
28 days
1942
17 days
1943
19 days
1944
19 days
1945
15 days
1946
17 days
1947
24 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
24 years with a frost
Across 24 years with a frost, the median last spring frost at State Sanatorium falls on 21 April and the median first autumn frost on 27 October, which leaves a median of 192 days between them.
Frost dates and growing season at State Sanatorium
Measure
Median, all years
Earliest period
Recent period (1910 to 1945)
Recent against earliest
Fitted trend
Last spring frost
21 April
n/a
21 April
n/a
n/a
First autumn frost
27 October
n/a
27 October
n/a
n/a
Growing days
192 days
n/a
192 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.
Rainfall Return Levels
30 years, 1910 to 1947
A day with at least 77.1 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 157.6 mm (6.2 in) of rain is expected about once in 100 years.
Rainfall return levels at State Sanatorium: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
77.1 mm (3.0 in)
5 years
99.6 mm (3.9 in)
10 years
114.1 mm (4.5 in)
25 years
132.0 mm (5.2 in)
50 years
145.0 mm (5.7 in)
Longer than the 30 years of record
100 years
157.6 mm (6.2 in)
Longer than the 30 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, 30 years of values from 1910 to 1947.
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: 147.3 mm (5.8 in) in 1937; 137.2 mm (5.4 in) in 1924; 104.1 mm (4.1 in) in 1912.
Download the Data
Data for State Sanatorium standing records by year: CSV or JSON. Field meanings are on the data page.
Data for State Sanatorium 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.