Record envelope, standing records and threshold days for Fort Sill (USC00343300), Oklahoma, United States, with 39 years of record.
Key Facts for Fort Sill
Fort Sill (USC00343300) is a weather station in Oklahoma, United States at 34.67 latitude and -98.38 longitude, 366 m (1,200 ft) above sea level.
The station reports from 1870 to 1908, 39 years of record.
1,464 records set at Fort Sill still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Fort Sill set a daily record high maximum temperature of 35.0 C (95.0 F) on 18 March 1908.
About the Station
Location: Oklahoma, United States, 34.67 latitude, -98.38 longitude.
Elevation: 366 m (1,200 ft).
Period of record: 1870 to 1908, 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 Fort Sill. 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 Fort Sill, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
27.8 C (82.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Feb
33.3 C (91.9 F)
-25.6 C (-14.1 F)
n/a
n/a
Mar
35.6 C (96.1 F)
-17.8 C (0.0 F)
n/a
n/a
Apr
36.7 C (98.1 F)
-5.0 C (23.0 F)
n/a
n/a
May
39.7 C (103.5 F)
-1.1 C (30.0 F)
n/a
n/a
Jun
41.7 C (107.1 F)
3.9 C (39.0 F)
n/a
n/a
Jul
42.2 C (108.0 F)
10.0 C (50.0 F)
n/a
n/a
Aug
43.9 C (111.0 F)
8.9 C (48.0 F)
n/a
n/a
Sep
40.6 C (105.1 F)
2.8 C (37.0 F)
n/a
n/a
Oct
35.6 C (96.1 F)
-7.2 C (19.0 F)
n/a
n/a
Nov
33.3 C (91.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Dec
26.1 C (79.0 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 Fort Sill still stand. 1879 holds the most, with 80.
Standing records at Fort Sill by the year they were set
Year set
Standing records
1872
40
1873
49
1874
54
1875
58
1876
71
1877
56
1878
44
1879
80
1880
69
1881
76
1882
37
1883
20
1884
19
1885
23
1886
67
1887
25
1888
34
1889
49
1890
25
1891
29
1892
30
1893
43
1894
39
1895
43
1896
62
1897
24
1898
23
1899
32
1900
25
1901
26
1902
29
1903
27
1904
30
1905
24
1906
18
1907
59
1908
5
Wettest Day of Each Month
Jul: 193.0 mm (7.6 in)
The wettest day on record for each calendar month at Fort Sill. The most was 193.0 mm (7.6 in) on 17 July 1899.
Record daily precipitation for each month at Fort Sill
Month
Record daily precipitation (mm)
Date
Jan
66.0 mm (2.6 in)
17 January 1893
Feb
55.9 mm (2.2 in)
9 February 1898
Mar
53.3 mm (2.1 in)
30 March 1871
Apr
164.1 mm (6.5 in)
22 April 1879
May
144.8 mm (5.7 in)
12 May 1905
Jun
116.8 mm (4.6 in)
8 June 1904
Jul
193.0 mm (7.6 in)
17 July 1899
Aug
76.7 mm (3.0 in)
25 August 1888
Sep
99.6 mm (3.9 in)
8 September 1905
Oct
106.2 mm (4.2 in)
14 October 1877
Nov
111.8 mm (4.4 in)
19 November 1899
Dec
68.6 mm (2.7 in)
18 December 1870
Period of Record Coverage
1872 to 1908
Complete yearUnder 90 percent of days
37 years of record at Fort Sill, 1872 to 1908. 8 years have data for under 90 percent of days and are left out of rankings: 1872, 1873, 1883, 1884, 1892, 1898, 1899, 1908.
Cooler than the station meanWarmer than the station mean
One stripe for each of 24 complete years at Fort Sill, 1874 to 1905. Blue stripes are years cooler than the station's own mean of 15.7 C (60.2 F); red stripes are warmer. The coolest year was 1875, at 14.0 C (57.2 F), and the warmest was 1896, at 17.3 C (63.2 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Fort Sill as warming stripes, 1874 to 1905
Year
Annual mean temperature
Difference from the station mean
1874
16.1 C
+0.44 C
1875
14.0 C
-1.66 C
1876
14.7 C
-0.96 C
1877
14.2 C
-1.44 C
1878
14.9 C
-0.83 C
1880
15.7 C
-0.03 C
1881
16.8 C
+1.07 C
1882
16.2 C
+0.53 C
1885
15.0 C
-0.64 C
1886
16.1 C
+0.37 C
1887
16.2 C
+0.52 C
1888
15.2 C
-0.52 C
1889
15.7 C
+0.05 C
1891
15.5 C
-0.19 C
1893
15.9 C
+0.19 C
1894
15.7 C
+0.04 C
1895
15.3 C
-0.36 C
1896
17.3 C
+1.63 C
1897
15.9 C
+0.17 C
1901
16.9 C
+1.23 C
1902
16.3 C
+0.59 C
1903
15.1 C
-0.63 C
1904
16.4 C
+0.74 C
1905
15.4 C
-0.32 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
1870 to 1908
Yearly extremes at Fort Sill: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
1874
40.6 C (105.1 F)
37
Coldest night (TNn)
-28.9 C (-20.0 F)
1873
-16.7 C (1.9 F)
37
Wettest day (Rx1day)
193.0 mm (7.6 in)
1899
69.8 mm (2.7 in)
38
Wettest five days (Rx5day)
240.0 mm (9.4 in)
1899
93.8 mm (3.7 in)
38
Longest dry spell (CDD)
77 days
1903
31 days
38
Hottest day (TXx)
The hottest day of the year at Fort Sill, 1870 to 1908. The record is 43.9 C (111.0 F) in 1874, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Fort Sill by year
Year
Hottest day (TXx)
1870
n/a
1871
n/a
1872
40.6 C (105.1 F)
1873
41.1 C (106.0 F)
1874
43.9 C (111.0 F)
1875
38.3 C (100.9 F)
1876
38.3 C (100.9 F)
1877
38.3 C (100.9 F)
1878
37.2 C (99.0 F)
1879
41.1 C (106.0 F)
1880
36.1 C (97.0 F)
1881
41.1 C (106.0 F)
1882
40.6 C (105.1 F)
1883
38.9 C (102.0 F)
1884
41.7 C (107.1 F)
1885
39.7 C (103.5 F)
1886
41.1 C (106.0 F)
1887
40.7 C (105.3 F)
1888
40.6 C (105.1 F)
1889
39.4 C (102.9 F)
1890
39.4 C (102.9 F)
1891
38.3 C (100.9 F)
1892
40.0 C (104.0 F)
1893
40.6 C (105.1 F)
1894
42.2 C (108.0 F)
1895
40.6 C (105.1 F)
1896
42.8 C (109.0 F)
1897
41.1 C (106.0 F)
1898
40.0 C (104.0 F)
1899
40.0 C (104.0 F)
1900
39.4 C (102.9 F)
1901
41.7 C (107.1 F)
1902
41.7 C (107.1 F)
1903
40.6 C (105.1 F)
1904
38.3 C (100.9 F)
1905
40.6 C (105.1 F)
1906
36.1 C (97.0 F)
1907
38.9 C (102.0 F)
1908
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Fort Sill, 1870 to 1908. The record is -28.9 C (-20.0 F) in 1873, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Fort Sill by year
Year
Coldest night (TNn)
1870
n/a
1871
n/a
1872
-16.7 C (1.9 F)
1873
-28.9 C (-20.0 F)
1874
-13.9 C (7.0 F)
1875
-22.2 C (-8.0 F)
1876
-22.8 C (-9.0 F)
1877
-15.6 C (3.9 F)
1878
-15.0 C (5.0 F)
1879
-28.9 C (-20.0 F)
1880
-20.0 C (-4.0 F)
1881
-18.9 C (-2.0 F)
1882
-13.3 C (8.1 F)
1883
-19.7 C (-3.5 F)
1884
-16.7 C (1.9 F)
1885
-17.2 C (1.0 F)
1886
-20.6 C (-5.1 F)
1887
-17.7 C (0.1 F)
1888
-21.8 C (-7.2 F)
1889
-13.9 C (7.0 F)
1890
-14.4 C (6.1 F)
1891
-11.1 C (12.0 F)
1892
-21.1 C (-6.0 F)
1893
-15.0 C (5.0 F)
1894
-20.6 C (-5.1 F)
1895
-21.7 C (-7.1 F)
1896
-12.2 C (10.0 F)
1897
-15.6 C (3.9 F)
1898
-14.4 C (6.1 F)
1899
-25.6 C (-14.1 F)
1900
-15.0 C (5.0 F)
1901
-17.2 C (1.0 F)
1902
-15.6 C (3.9 F)
1903
-13.9 C (7.0 F)
1904
-15.0 C (5.0 F)
1905
-21.7 C (-7.1 F)
1906
-17.8 C (0.0 F)
1907
-11.7 C (10.9 F)
1908
-12.2 C (10.0 F)
Wettest day (Rx1day)
The wettest day of the year at Fort Sill, 1870 to 1908. The record is 193.0 mm (7.6 in) in 1899, marked on the chart; the median year is 69.8 mm (2.7 in).
Wettest day (Rx1day) at Fort Sill by year
Year
Wettest day (Rx1day)
1870
96.0 mm (3.8 in)
1871
89.7 mm (3.5 in)
1872
50.8 mm (2.0 in)
1873
69.9 mm (2.8 in)
1874
47.0 mm (1.9 in)
1875
114.3 mm (4.5 in)
1876
88.9 mm (3.5 in)
1877
106.2 mm (4.2 in)
1878
59.4 mm (2.3 in)
1879
164.1 mm (6.5 in)
1880
n/a
1881
63.0 mm (2.5 in)
1882
69.6 mm (2.7 in)
1883
35.6 mm (1.4 in)
1884
50.0 mm (2.0 in)
1885
73.7 mm (2.9 in)
1886
54.6 mm (2.1 in)
1887
73.7 mm (2.9 in)
1888
76.7 mm (3.0 in)
1889
50.8 mm (2.0 in)
1890
78.0 mm (3.1 in)
1891
82.6 mm (3.3 in)
1892
58.4 mm (2.3 in)
1893
66.0 mm (2.6 in)
1894
51.6 mm (2.0 in)
1895
100.8 mm (4.0 in)
1896
42.7 mm (1.7 in)
1897
46.7 mm (1.8 in)
1898
74.9 mm (2.9 in)
1899
193.0 mm (7.6 in)
1900
78.7 mm (3.1 in)
1901
45.7 mm (1.8 in)
1902
86.4 mm (3.4 in)
1903
48.3 mm (1.9 in)
1904
116.8 mm (4.6 in)
1905
144.8 mm (5.7 in)
1906
52.3 mm (2.1 in)
1907
53.3 mm (2.1 in)
1908
47.0 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Fort Sill, 1870 to 1908. The record is 240.0 mm (9.4 in) in 1899, marked on the chart; the median year is 93.8 mm (3.7 in).
Wettest five days (Rx5day) at Fort Sill by year
Year
Wettest five days (Rx5day)
1870
115.6 mm (4.6 in)
1871
114.8 mm (4.5 in)
1872
94.0 mm (3.7 in)
1873
97.8 mm (3.9 in)
1874
76.2 mm (3.0 in)
1875
158.5 mm (6.2 in)
1876
174.7 mm (6.9 in)
1877
162.1 mm (6.4 in)
1878
90.9 mm (3.6 in)
1879
165.4 mm (6.5 in)
1880
n/a
1881
57.9 mm (2.3 in)
1882
72.2 mm (2.8 in)
1883
81.8 mm (3.2 in)
1884
92.8 mm (3.7 in)
1885
83.1 mm (3.3 in)
1886
93.5 mm (3.7 in)
1887
153.4 mm (6.0 in)
1888
113.5 mm (4.5 in)
1889
69.9 mm (2.8 in)
1890
120.9 mm (4.8 in)
1891
123.7 mm (4.9 in)
1892
91.7 mm (3.6 in)
1893
86.4 mm (3.4 in)
1894
16.5 mm (0.6 in)
1895
12.0 mm (0.5 in)
1896
12.7 mm (0.5 in)
1897
53.1 mm (2.1 in)
1898
106.7 mm (4.2 in)
1899
240.0 mm (9.4 in)
1900
166.4 mm (6.6 in)
1901
104.2 mm (4.1 in)
1902
147.3 mm (5.8 in)
1903
78.8 mm (3.1 in)
1904
180.3 mm (7.1 in)
1905
174.0 mm (6.9 in)
1906
86.4 mm (3.4 in)
1907
68.5 mm (2.7 in)
1908
38.1 mm (1.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Fort Sill, 1870 to 1908. The record is 77 days in 1903, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at Fort Sill by year
Year
Longest dry spell (CDD)
1870
40 days
1871
36 days
1872
33 days
1873
39 days
1874
67 days
1875
63 days
1876
42 days
1877
29 days
1878
34 days
1879
35 days
1880
n/a
1881
30 days
1882
30 days
1883
26 days
1884
19 days
1885
30 days
1886
40 days
1887
29 days
1888
22 days
1889
35 days
1890
24 days
1891
34 days
1892
31 days
1893
24 days
1894
16 days
1895
22 days
1896
10 days
1897
26 days
1898
19 days
1899
31 days
1900
22 days
1901
43 days
1902
68 days
1903
77 days
1904
74 days
1905
26 days
1906
34 days
1907
39 days
1908
27 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 Fort Sill falls on 2 April and the median first autumn frost on 31 October, which leaves a median of 219 days between them.
Frost dates and growing season at Fort Sill
Measure
Median, all years
Earliest period
Recent period (1874 to 1905)
Recent against earliest
Fitted trend
Last spring frost
2 April
n/a
2 April
n/a
n/a
First autumn frost
31 October
n/a
31 October
n/a
n/a
Growing days
219 days
n/a
219 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 Fort Sill standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Fort Sill 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.