Fort Sill Weather Records (USC00343300)

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

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

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

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.

Days with data per year at Fort Sill
Year	Days with data	Share of year	Complete
1872	304	83%	No
1873	323	88%	No
1874	361	99%	Yes
1875	358	98%	Yes
1876	362	99%	Yes
1877	365	100%	Yes
1878	365	100%	Yes
1879	359	98%	Yes
1880	361	99%	Yes
1881	348	95%	Yes
1882	364	100%	Yes
1883	242	66%	No
1884	184	50%	No
1885	365	100%	Yes
1886	364	100%	Yes
1887	365	100%	Yes
1888	363	99%	Yes
1889	361	99%	Yes
1890	345	95%	Yes
1891	358	98%	Yes
1892	304	83%	No
1893	351	96%	Yes
1894	361	99%	Yes
1895	355	97%	Yes
1896	359	98%	Yes
1897	361	99%	Yes
1898	300	82%	No
1899	302	83%	No
1900	338	93%	Yes
1901	361	99%	Yes
1902	363	99%	Yes
1903	362	99%	Yes
1904	359	98%	Yes
1905	361	99%	Yes
1906	350	96%	Yes
1907	334	92%	Yes
1908	86	23%	No

Latest Records

Latest records at Fort Sill
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 March 1908	Fort Sill, US	daily high max	35.0 C (95.0 F)	3.3 C (5.9 F)	1 year	7 of 100 (Routine)
17 March 1908	Fort Sill, US	daily high max	33.3 C (91.9 F)	3.3 C (5.9 F)	25 years	14 of 100 (Routine)
16 March 1908	Fort Sill, US	daily high max (Tie)	29.4 C (84.9 F)	tie	29 years	2 of 100 (Routine)
15 March 1908	Fort Sill, US	daily high max	28.3 C (82.9 F)	0.5 C (0.9 F)	29 years	11 of 100 (Routine)
6 March 1908	Fort Sill, US	daily high min (Tie)	12.2 C (54.0 F)	tie	9 years	1 of 100 (Routine)
5 March 1908	Fort Sill, US	daily high min	16.1 C (61.0 F)	2.8 C (5.0 F)	3 years	7 of 100 (Routine)
24 February 1908	Fort Sill, US	daily rain	47.0 mm (1.9 in)	38.9 mm (1.5 in)	19 years	47 of 100 (Notable)
11 February 1908	Fort Sill, US	daily rain	27.9 mm (1.1 in)	19.8 mm (0.8 in)	36 years	33 of 100 (Routine)
25 January 1908	Fort Sill, US	daily high max	21.1 C (70.0 F)	0.5 C (0.9 F)	28 years	11 of 100 (Routine)
21 January 1908	Fort Sill, US	daily high min (Tie)	6.7 C (44.1 F)	tie	11 years	1 of 100 (Routine)
4 January 1908	Fort Sill, US	daily rain	25.4 mm (1.0 in)	22.1 mm (0.9 in)	28 years	33 of 100 (Routine)
27 December 1907	Fort Sill, US	daily high max	22.8 C (73.0 F)	2.2 C (4.0 F)	17 years	11 of 100 (Routine)
21 December 1907	Fort Sill, US	daily rain	53.3 mm (2.1 in)	34.2 mm (1.3 in)	33 years	40 of 100 (Notable)
9 December 1907	Fort Sill, US	daily high min	7.2 C (45.0 F)	1.6 C (2.9 F)	7 years	7 of 100 (Routine)
7 December 1907	Fort Sill, US	daily high min	7.8 C (46.0 F)	0.6 C (1.1 F)	34 years	14 of 100 (Routine)
27 November 1907	Fort Sill, US	daily high min (Tie)	5.0 C (41.0 F)	tie	14 years	1 of 100 (Routine)
9 November 1907	Fort Sill, US	daily high min	12.2 C (54.0 F)	0.5 C (0.9 F)	24 years	10 of 100 (Routine)
7 November 1907	Fort Sill, US	daily high min	16.1 C (61.0 F)	3.9 C (7.0 F)	32 years	19 of 100 (Routine)
6 November 1907	Fort Sill, US	daily high min	16.7 C (62.1 F)	2.3 C (4.1 F)	32 years	16 of 100 (Routine)
3 November 1907	Fort Sill, US	daily high min	11.1 C (52.0 F)	1.4 C (2.5 F)	22 years	11 of 100 (Routine)

Climate Trend

24 complete years, 1874 to 1905

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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).