Record envelope, standing records and threshold days for Takoma Park # 1 (USC00188715), Maryland, United States, with 51 years of record.
Key Facts for Takoma Park # 1
Takoma Park # 1 (USC00188715) is a weather station in Maryland, United States at 38.98 latitude and -77.02 longitude, 98 m (320 ft) above sea level.
The station reports from 1899 to 1949, 51 years of record.
1,464 records set at Takoma Park # 1 still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Takoma Park # 1 tied a daily record high maximum temperature of 21.7 C (71.1 F) on 28 January 1949.
About the Station
Location: Maryland, United States, 38.98 latitude, -77.02 longitude.
Elevation: 98 m (320 ft).
Period of record: 1899 to 1949, 51 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 Takoma Park # 1. 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 Takoma Park # 1, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.0 C (77.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Feb
28.9 C (84.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Mar
32.8 C (91.0 F)
-13.3 C (8.1 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-10.6 C (12.9 F)
n/a
n/a
May
36.1 C (97.0 F)
0.0 C (32.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
5.0 C (41.0 F)
n/a
n/a
Jul
42.2 C (108.0 F)
10.0 C (50.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
7.8 C (46.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
1.1 C (34.0 F)
n/a
n/a
Oct
36.1 C (97.0 F)
-4.4 C (24.1 F)
n/a
n/a
Nov
27.8 C (82.0 F)
-12.2 C (10.0 F)
n/a
n/a
Dec
22.8 C (73.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Takoma Park # 1 still stand. 1900 holds the most, with 48.
Standing records at Takoma Park # 1 by the year they were set
Year set
Standing records
1899
25
1900
48
1901
28
1902
28
1903
33
1904
43
1905
33
1906
23
1907
41
1908
26
1909
37
1910
27
1911
25
1912
34
1913
26
1914
41
1915
20
1916
21
1917
37
1918
38
1919
23
1920
14
1921
18
1922
9
1923
28
1924
11
1925
37
1926
25
1927
37
1928
29
1929
33
1930
48
1931
19
1932
17
1933
40
1934
38
1935
27
1936
48
1937
27
1938
29
1939
30
1940
30
1941
43
1942
33
1943
22
1944
15
1945
32
1946
27
1947
19
1948
21
1949
1
All-Time Record Progression
5 new records
5 all-time records were set at Takoma Park # 1 between 21 July 1930 and 10 July 1936. Each dot is a new record.
When Takoma Park # 1 set new all-time records
Date
Kind
Detail
1930-07-21
Record high maximum temperature
Record high maximum temperature 39.4 C (102.9 F)
1932-08-31
Record high maximum temperature
Record high maximum temperature 40.0 C (104.0 F)
1933-08-23
Record daily precipitation
Record daily precipitation 119.4 mm (4.7 in)
1935-09-06
Record daily precipitation
Record daily precipitation 174.0 mm (6.9 in)
1936-07-10
Record high maximum temperature
Record high maximum temperature 42.2 C (108.0 F)
Wettest Day of Each Month
Sep: 174.0 mm (6.9 in)
The wettest day on record for each calendar month at Takoma Park # 1. The most was 174.0 mm (6.9 in) on 6 September 1935.
Record daily precipitation for each month at Takoma Park # 1
Month
Record daily precipitation (mm)
Date
Jan
66.0 mm (2.6 in)
29 January 1922
Feb
45.7 mm (1.8 in)
20 February 1927
Mar
61.0 mm (2.4 in)
4 March 1909
Apr
88.9 mm (3.5 in)
26 April 1937
May
87.6 mm (3.4 in)
7 May 1912
Jun
74.9 mm (2.9 in)
17 June 1900
Jul
78.7 mm (3.1 in)
14 July 1922
Aug
119.4 mm (4.7 in)
23 August 1933
Sep
174.0 mm (6.9 in)
6 September 1935
Oct
86.4 mm (3.4 in)
16 October 1942
Nov
92.7 mm (3.6 in)
9 November 1943
Dec
59.2 mm (2.3 in)
21 December 1905
Period of Record Coverage
1899 to 1949
Complete yearUnder 90 percent of days
51 years of record at Takoma Park # 1, 1899 to 1949. 5 years have data for under 90 percent of days and are left out of rankings: 1899, 1931, 1932, 1948, 1949.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at Takoma Park # 1, 1900 to 1947. Blue stripes are years cooler than the station's own mean of 12.5 C (54.5 F); red stripes are warmer. The coolest year was 1904, at 10.6 C (51.0 F), and the warmest was 1939, at 14.0 C (57.2 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Takoma Park # 1 as warming stripes, 1900 to 1947
Year
Annual mean temperature
Difference from the station mean
1900
13.0 C
+0.44 C
1901
11.5 C
-1.02 C
1902
12.0 C
-0.48 C
1903
11.8 C
-0.74 C
1904
10.6 C
-1.96 C
1905
11.7 C
-0.77 C
1906
12.5 C
-0.05 C
1907
10.9 C
-1.64 C
1908
12.0 C
-0.54 C
1909
11.8 C
-0.70 C
1910
11.4 C
-1.09 C
1911
12.2 C
-0.28 C
1912
11.4 C
-1.16 C
1913
13.2 C
+0.68 C
1914
11.9 C
-0.57 C
1915
12.2 C
-0.30 C
1916
11.9 C
-0.66 C
1917
10.8 C
-1.69 C
1918
12.1 C
-0.40 C
1919
12.4 C
-0.14 C
1920
11.7 C
-0.79 C
1921
13.9 C
+1.35 C
1922
12.9 C
+0.39 C
1923
12.8 C
+0.26 C
1924
11.7 C
-0.80 C
1925
12.5 C
-0.05 C
1926
11.6 C
-0.92 C
1927
12.6 C
+0.09 C
1928
12.6 C
+0.07 C
1933
13.7 C
+1.23 C
1934
13.0 C
+0.50 C
1935
13.0 C
+0.48 C
1936
13.3 C
+0.76 C
1937
13.5 C
+1.03 C
1938
14.0 C
+1.47 C
1939
14.0 C
+1.50 C
1940
12.3 C
-0.26 C
1941
13.7 C
+1.23 C
1942
13.4 C
+0.92 C
1943
13.5 C
+0.95 C
1944
13.4 C
+0.85 C
1945
13.5 C
+0.95 C
1946
14.0 C
+1.44 C
1947
13.1 C
+0.55 C
The annual mean temperature here has risen by 0.5 C (0.3 to 0.6) per decade over 1900 to 1947. In Fahrenheit: 0.8 F (0.6 to 1.1) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Takoma Park # 1
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.5 C (0.3 to 0.6) per decade
0.8 F (0.6 to 1.1) per decade
1900 to 1947
44
Rise
Mean daily maximum
0.5 C (0.3 to 0.6) per decade
0.8 F (0.5 to 1.1) per decade
1900 to 1947
44
Rise
Mean daily minimum
0.5 C (0.3 to 0.6) per decade
0.8 F (0.6 to 1.1) per decade
1900 to 1947
44
Rise
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
1899 to 1949
Yearly extremes at Takoma Park # 1: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1936
36.1 C (97.0 F)
51
Coldest night (TNn)
-26.1 C (-15.0 F)
1918
-15.0 C (5.0 F)
51
Wettest day (Rx1day)
174.0 mm (6.9 in)
1935
59.7 mm (2.4 in)
51
Wettest five days (Rx5day)
215.7 mm (8.5 in)
1933
92.2 mm (3.6 in)
51
Longest dry spell (CDD)
32 days
1947
18 days
51
Hottest day (TXx)
The hottest day of the year at Takoma Park # 1, 1899 to 1949. The record is 42.2 C (108.0 F) in 1936, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Takoma Park # 1 by year
Year
Hottest day (TXx)
1899
36.1 C (97.0 F)
1900
37.8 C (100.0 F)
1901
36.7 C (98.1 F)
1902
37.8 C (100.0 F)
1903
36.1 C (97.0 F)
1904
35.6 C (96.1 F)
1905
35.0 C (95.0 F)
1906
33.3 C (91.9 F)
1907
32.8 C (91.0 F)
1908
35.6 C (96.1 F)
1909
35.0 C (95.0 F)
1910
35.6 C (96.1 F)
1911
37.2 C (99.0 F)
1912
32.2 C (90.0 F)
1913
35.0 C (95.0 F)
1914
36.1 C (97.0 F)
1915
34.4 C (93.9 F)
1916
34.4 C (93.9 F)
1917
35.0 C (95.0 F)
1918
38.9 C (102.0 F)
1919
36.7 C (98.1 F)
1920
33.9 C (93.0 F)
1921
35.0 C (95.0 F)
1922
33.3 C (91.9 F)
1923
36.1 C (97.0 F)
1924
36.1 C (97.0 F)
1925
36.1 C (97.0 F)
1926
37.8 C (100.0 F)
1927
35.0 C (95.0 F)
1928
33.9 C (93.0 F)
1929
35.6 C (96.1 F)
1930
39.4 C (102.9 F)
1931
36.1 C (97.0 F)
1932
40.0 C (104.0 F)
1933
36.7 C (98.1 F)
1934
40.0 C (104.0 F)
1935
36.7 C (98.1 F)
1936
42.2 C (108.0 F)
1937
36.1 C (97.0 F)
1938
36.7 C (98.1 F)
1939
37.2 C (99.0 F)
1940
37.8 C (100.0 F)
1941
36.7 C (98.1 F)
1942
36.7 C (98.1 F)
1943
38.3 C (100.9 F)
1944
36.1 C (97.0 F)
1945
36.1 C (97.0 F)
1946
35.6 C (96.1 F)
1947
35.0 C (95.0 F)
1948
35.0 C (95.0 F)
1949
21.7 C (71.1 F)
Coldest night (TNn)
The coldest night of the year at Takoma Park # 1, 1899 to 1949. The record is -26.1 C (-15.0 F) in 1918, marked on the chart; the median year is -15.0 C (5.0 F).
Coldest night (TNn) at Takoma Park # 1 by year
Year
Coldest night (TNn)
1899
-3.9 C (25.0 F)
1900
-15.6 C (3.9 F)
1901
-15.6 C (3.9 F)
1902
-16.1 C (3.0 F)
1903
-18.3 C (-0.9 F)
1904
-19.4 C (-2.9 F)
1905
-18.3 C (-0.9 F)
1906
-15.0 C (5.0 F)
1907
-16.7 C (1.9 F)
1908
-16.1 C (3.0 F)
1909
-16.1 C (3.0 F)
1910
-15.0 C (5.0 F)
1911
-11.7 C (10.9 F)
1912
-22.2 C (-8.0 F)
1913
-12.2 C (10.0 F)
1914
-17.8 C (0.0 F)
1915
-8.9 C (16.0 F)
1916
-16.1 C (3.0 F)
1917
-21.1 C (-6.0 F)
1918
-26.1 C (-15.0 F)
1919
-13.3 C (8.1 F)
1920
-15.0 C (5.0 F)
1921
-12.8 C (9.0 F)
1922
-14.4 C (6.1 F)
1923
-12.2 C (10.0 F)
1924
-15.0 C (5.0 F)
1925
-17.8 C (0.0 F)
1926
-14.4 C (6.1 F)
1927
-15.0 C (5.0 F)
1928
-12.8 C (9.0 F)
1929
-13.9 C (7.0 F)
1930
-15.6 C (3.9 F)
1931
-11.7 C (10.9 F)
1932
-11.7 C (10.9 F)
1933
-15.0 C (5.0 F)
1934
-22.8 C (-9.0 F)
1935
-23.3 C (-9.9 F)
1936
-18.9 C (-2.0 F)
1937
-10.0 C (14.0 F)
1938
-10.6 C (12.9 F)
1939
-10.6 C (12.9 F)
1940
-15.0 C (5.0 F)
1941
-11.1 C (12.0 F)
1942
-19.4 C (-2.9 F)
1943
-15.6 C (3.9 F)
1944
-11.1 C (12.0 F)
1945
-12.8 C (9.0 F)
1946
-13.3 C (8.1 F)
1947
-15.0 C (5.0 F)
1948
-17.2 C (1.0 F)
1949
-7.2 C (19.0 F)
Wettest day (Rx1day)
The wettest day of the year at Takoma Park # 1, 1899 to 1949. The record is 174.0 mm (6.9 in) in 1935, marked on the chart; the median year is 59.7 mm (2.4 in).
Wettest day (Rx1day) at Takoma Park # 1 by year
Year
Wettest day (Rx1day)
1899
72.6 mm (2.9 in)
1900
74.9 mm (2.9 in)
1901
59.7 mm (2.4 in)
1902
78.0 mm (3.1 in)
1903
60.7 mm (2.4 in)
1904
105.2 mm (4.1 in)
1905
92.7 mm (3.6 in)
1906
55.9 mm (2.2 in)
1907
71.1 mm (2.8 in)
1908
72.4 mm (2.9 in)
1909
61.0 mm (2.4 in)
1910
59.2 mm (2.3 in)
1911
41.9 mm (1.6 in)
1912
87.6 mm (3.4 in)
1913
65.5 mm (2.6 in)
1914
55.9 mm (2.2 in)
1915
71.1 mm (2.8 in)
1916
57.2 mm (2.3 in)
1917
55.9 mm (2.2 in)
1918
41.9 mm (1.6 in)
1919
53.3 mm (2.1 in)
1920
57.7 mm (2.3 in)
1921
48.3 mm (1.9 in)
1922
82.6 mm (3.3 in)
1923
42.2 mm (1.7 in)
1924
66.0 mm (2.6 in)
1925
41.9 mm (1.6 in)
1926
38.1 mm (1.5 in)
1927
45.7 mm (1.8 in)
1928
55.9 mm (2.2 in)
1929
38.9 mm (1.5 in)
1930
44.5 mm (1.8 in)
1931
33.8 mm (1.3 in)
1932
56.1 mm (2.2 in)
1933
119.4 mm (4.7 in)
1934
62.2 mm (2.4 in)
1935
174.0 mm (6.9 in)
1936
45.7 mm (1.8 in)
1937
88.9 mm (3.5 in)
1938
40.6 mm (1.6 in)
1939
68.6 mm (2.7 in)
1940
56.6 mm (2.2 in)
1941
48.3 mm (1.9 in)
1942
108.5 mm (4.3 in)
1943
92.7 mm (3.6 in)
1944
112.3 mm (4.4 in)
1945
48.3 mm (1.9 in)
1946
68.8 mm (2.7 in)
1947
61.5 mm (2.4 in)
1948
60.5 mm (2.4 in)
1949
29.2 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Takoma Park # 1, 1899 to 1949. The record is 215.7 mm (8.5 in) in 1933, marked on the chart; the median year is 92.2 mm (3.6 in).
Wettest five days (Rx5day) at Takoma Park # 1 by year
Year
Wettest five days (Rx5day)
1899
75.5 mm (3.0 in)
1900
119.8 mm (4.7 in)
1901
113.3 mm (4.5 in)
1902
85.8 mm (3.4 in)
1903
92.2 mm (3.6 in)
1904
115.4 mm (4.5 in)
1905
138.1 mm (5.4 in)
1906
92.0 mm (3.6 in)
1907
102.8 mm (4.0 in)
1908
74.9 mm (2.9 in)
1909
66.6 mm (2.6 in)
1910
89.1 mm (3.5 in)
1911
86.3 mm (3.4 in)
1912
109.2 mm (4.3 in)
1913
117.1 mm (4.6 in)
1914
100.1 mm (3.9 in)
1915
86.1 mm (3.4 in)
1916
109.3 mm (4.3 in)
1917
71.9 mm (2.8 in)
1918
100.3 mm (3.9 in)
1919
115.0 mm (4.5 in)
1920
64.8 mm (2.6 in)
1921
62.6 mm (2.5 in)
1922
89.6 mm (3.5 in)
1923
64.5 mm (2.5 in)
1924
100.3 mm (3.9 in)
1925
54.6 mm (2.1 in)
1926
77.8 mm (3.1 in)
1927
69.8 mm (2.7 in)
1928
101.6 mm (4.0 in)
1929
80.0 mm (3.1 in)
1930
51.9 mm (2.0 in)
1931
62.7 mm (2.5 in)
1932
76.7 mm (3.0 in)
1933
215.7 mm (8.5 in)
1934
158.7 mm (6.2 in)
1935
200.0 mm (7.9 in)
1936
82.6 mm (3.3 in)
1937
131.8 mm (5.2 in)
1938
93.9 mm (3.7 in)
1939
127.1 mm (5.0 in)
1940
71.2 mm (2.8 in)
1941
83.1 mm (3.3 in)
1942
180.5 mm (7.1 in)
1943
106.6 mm (4.2 in)
1944
119.4 mm (4.7 in)
1945
133.1 mm (5.2 in)
1946
103.8 mm (4.1 in)
1947
80.0 mm (3.1 in)
1948
103.0 mm (4.1 in)
1949
42.7 mm (1.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Takoma Park # 1, 1899 to 1949. The record is 32 days in 1947, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Takoma Park # 1 by year
Year
Longest dry spell (CDD)
1899
19 days
1900
16 days
1901
29 days
1902
18 days
1903
17 days
1904
19 days
1905
14 days
1906
17 days
1907
14 days
1908
21 days
1909
17 days
1910
23 days
1911
16 days
1912
16 days
1913
18 days
1914
19 days
1915
16 days
1916
13 days
1917
21 days
1918
17 days
1919
12 days
1920
26 days
1921
15 days
1922
25 days
1923
25 days
1924
26 days
1925
13 days
1926
14 days
1927
14 days
1928
18 days
1929
18 days
1930
30 days
1931
19 days
1932
17 days
1933
13 days
1934
19 days
1935
14 days
1936
23 days
1937
16 days
1938
13 days
1939
18 days
1940
23 days
1941
24 days
1942
18 days
1943
15 days
1944
18 days
1945
16 days
1946
23 days
1947
32 days
1948
11 days
1949
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.
Frost Dates and Growing Season
44 years with a frost
Across 44 years with a frost, the median last spring frost at Takoma Park # 1 falls on 12 April and the median first autumn frost on 29 October, which leaves a median of 203 days between them.
Fitted over all years, the growing season changes by +0.3 days per decade at this station.
Frost dates and growing season at Takoma Park # 1
Measure
Median, all years
Earliest period
Recent period (1914 to 1947)
Recent against earliest
Fitted trend
Last spring frost
12 April
n/a
14 April
n/a
+1.3 days per decade
First autumn frost
29 October
n/a
31 October
n/a
+1.6 days per decade
Growing days
203 days
n/a
203 days
n/a
+0.3 days per decade
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
45 years, 1900 to 1947
A day with at least 60.2 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 172.0 mm (6.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Takoma Park # 1: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
60.2 mm (2.4 in)
5 years
81.6 mm (3.2 in)
10 years
98.6 mm (3.9 in)
25 years
124.2 mm (4.9 in)
50 years
146.5 mm (5.8 in)
Longer than the 45 years of record
100 years
172.0 mm (6.8 in)
Longer than the 45 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, 45 years of values from 1900 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: 174.0 mm (6.9 in) in 1935; 119.4 mm (4.7 in) in 1933; 112.3 mm (4.4 in) in 1944.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Takoma Park # 1, at 1933. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1933 ran 0.4 C (0.7 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Takoma Park # 1, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1933
+0.4
+0.7
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
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Data for Takoma Park # 1 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Takoma Park # 1 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.