Stilwell 5 NNW Weather Records (USC00348506)

Record envelope, standing records and threshold days for Stilwell 5 NNW (USC00348506), Oklahoma, United States, with 56 years of record.

Key Facts for Stilwell 5 NNW

Stilwell 5 NNW (USC00348506) is a weather station in Oklahoma, United States at 35.90 latitude and -94.65 longitude, 305 m (1,000 ft) above sea level.
The station reports from 1948 to 2003, 56 years of record.
1,464 records set at Stilwell 5 NNW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Stilwell 5 NNW set a daily record low minimum temperature of -3.9 C (25.0 F) on 10 April 2003.

About the Station

Location: Oklahoma, United States, 35.90 latitude, -94.65 longitude.
Elevation: 305 m (1,000 ft).
Period of record: 1948 to 2003, 56 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

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 Stilwell 5 NNW. 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 Stilwell 5 NNW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	23.9 C (75.0 F)	-24.4 C (-11.9 F)	n/a	n/a
Feb	29.4 C (84.9 F)	-22.8 C (-9.0 F)	n/a	n/a
Mar	32.2 C (90.0 F)	-16.1 C (3.0 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-5.6 C (21.9 F)	n/a	n/a
May	33.3 C (91.9 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	37.8 C (100.0 F)	4.4 C (39.9 F)	n/a	n/a
Jul	42.2 C (108.0 F)	8.3 C (46.9 F)	n/a	n/a
Aug	41.7 C (107.1 F)	7.8 C (46.0 F)	n/a	n/a
Sep	41.1 C (106.0 F)	-0.6 C (30.9 F)	n/a	n/a
Oct	34.4 C (93.9 F)	-5.0 C (23.0 F)	n/a	n/a
Nov	30.6 C (87.1 F)	-15.0 C (5.0 F)	n/a	n/a
Dec	26.1 C (79.0 F)	-24.4 C (-11.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Stilwell 5 NNW still stand. 1980 holds the most, with 74.

Standing records at Stilwell 5 NNW by the year they were set
Year set	Standing records
1960	36
1961	34
1962	46
1963	66
1964	43
1965	39
1966	36
1967	50
1968	38
1969	18
1970	41
1971	30
1972	45
1973	14
1974	47
1975	27
1976	36
1977	28
1978	50
1979	36
1980	74
1981	30
1982	34
1983	40
1984	35
1985	32
1986	34
1987	28
1988	31
1989	52
1990	23
1991	29
1992	24
1993	15
1994	15
1995	23
1996	32
1997	29
1998	27
1999	27
2000	39
2001	21
2002	6
2003	4

All-Time Record Progression

4 new records

4 all-time records were set at Stilwell 5 NNW between 1 October 1986 and 27 August 2000. Each dot is a new record.

When Stilwell 5 NNW set new all-time records
Date	Kind	Detail
1986-10-01	Record daily precipitation	Record daily precipitation 163.8 mm (6.4 in)
1989-03-06	Record daily snowfall	Record daily snowfall 30.7 cm (12.1 in)
1989-03-06	Record snow depth	Record snow depth 35.6 cm (14.0 in)
2000-08-27	Record high minimum temperature	Record high minimum temperature 28.3 C (82.9 F)

Wettest Day of Each Month

Sep: 163.8 mm (6.4 in)

The wettest day on record for each calendar month at Stilwell 5 NNW. The most was 163.8 mm (6.4 in) on 27 September 1996.

Record daily precipitation for each month at Stilwell 5 NNW
Month	Record daily precipitation (mm)	Date
Jan	86.4 mm (3.4 in)	4 January 1998
Feb	69.9 mm (2.8 in)	9 February 1966
Mar	70.4 mm (2.8 in)	24 March 1978
Apr	121.9 mm (4.8 in)	3 April 1957
May	118.6 mm (4.7 in)	3 May 1990
Jun	94.0 mm (3.7 in)	21 June 2000
Jul	109.7 mm (4.3 in)	23 July 1960
Aug	96.8 mm (3.8 in)	10 August 1986
Sep	163.8 mm (6.4 in)	27 September 1996
Oct	163.8 mm (6.4 in)	1 October 1986
Nov	112.0 mm (4.4 in)	5 November 1994
Dec	88.9 mm (3.5 in)	16 December 2001

Period of Record Coverage

1960 to 2003

44 years of record at Stilwell 5 NNW, 1960 to 2003. 4 years have data for under 90 percent of days and are left out of rankings: 1993, 1994, 2002, 2003.

Days with data per year at Stilwell 5 NNW
Year	Days with data	Share of year	Complete
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	364	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	364	99%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	365	100%	Yes
1981	365	100%	Yes
1982	364	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	365	100%	Yes
1989	365	100%	Yes
1990	363	99%	Yes
1991	365	100%	Yes
1992	365	100%	Yes
1993	212	58%	No
1994	273	75%	No
1995	359	98%	Yes
1996	360	98%	Yes
1997	351	96%	Yes
1998	346	95%	Yes
1999	348	95%	Yes
2000	343	94%	Yes
2001	354	97%	Yes
2002	176	48%	No
2003	61	17%	No

Latest Records

Latest records at Stilwell 5 NNW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 April 2003	Stilwell 5 NNW, US	daily low min	-3.9 C (25.0 F)	1.1 C (2.0 F)	29 years	13 of 100 (Routine)
8 April 2003	Stilwell 5 NNW, US	daily low max	8.9 C (48.0 F)	1.1 C (2.0 F)	20 years	12 of 100 (Routine)
28 March 2003	Stilwell 5 NNW, US	daily low min	-6.1 C (21.0 F)	5.0 C (9.0 F)	36 years	22 of 100 (Routine)
28 March 2003	Stilwell 5 NNW, US	daily low max	2.2 C (36.0 F)	5.0 C (9.0 F)	6 years	13 of 100 (Routine)
9 March 2003	Stilwell 5 NNW, US	daily low max (Tie)	2.8 C (37.0 F)	tie	33 years	3 of 100 (Routine)
6 March 2003	Stilwell 5 NNW, US	daily low min (Tie)	-7.8 C (18.0 F)	tie	40 years	4 of 100 (Routine)
24 July 2002	Stilwell 5 NNW, US	daily low min	15.0 C (59.0 F)	1.1 C (2.0 F)	17 years	12 of 100 (Routine)
1 July 2002	Stilwell 5 NNW, US	daily low max	25.6 C (78.1 F)	0.5 C (0.9 F)	7 years	7 of 100 (Routine)
26 June 2002	Stilwell 5 NNW, US	daily rain	48.3 mm (1.9 in)	12.2 mm (0.5 in)	44 years	26 of 100 (Routine)
19 May 2002	Stilwell 5 NNW, US	daily low min	3.3 C (37.9 F)	3.9 C (7.0 F)	19 years	17 of 100 (Routine)
19 May 2002	Stilwell 5 NNW, US	daily low max (Tie)	18.9 C (66.0 F)	tie	33 years	3 of 100 (Routine)
18 May 2002	Stilwell 5 NNW, US	daily low max (Tie)	18.3 C (64.9 F)	tie	16 years	2 of 100 (Routine)
9 May 2002	Stilwell 5 NNW, US	daily low max	15.0 C (59.0 F)	4.4 C (7.9 F)	40 years	28 of 100 (Routine)
1 May 2002	Stilwell 5 NNW, US	daily high max	30.6 C (87.1 F)	2.3 C (4.1 F)	15 years	14 of 100 (Routine)
8 April 2002	Stilwell 5 NNW, US	daily rain	82.6 mm (3.3 in)	52.6 mm (2.1 in)	17 years	48 of 100 (Notable)
23 January 2002	Stilwell 5 NNW, US	daily high max (Tie)	22.2 C (72.0 F)	tie	35 years	3 of 100 (Routine)
2 January 2002	Stilwell 5 NNW, US	daily low max	-7.8 C (18.0 F)	2.2 C (4.0 F)	23 years	13 of 100 (Routine)
16 December 2001	Stilwell 5 NNW, US	monthly rain	88.9 mm (3.5 in)	3.0 mm (0.12 in)	19 years	22 of 100 (Routine)
29 November 2001	Stilwell 5 NNW, US	daily low max (Tie)	1.7 C (35.1 F)	tie	22 years	2 of 100 (Routine)
28 October 2001	Stilwell 5 NNW, US	daily low min (Tie)	-2.2 C (28.0 F)	tie	24 years	2 of 100 (Routine)

Climate Trend

40 complete years, 1960 to 2001

One stripe for each of 40 complete years at Stilwell 5 NNW, 1960 to 2001. Blue stripes are years cooler than the station's own mean of 15.1 C (59.2 F); red stripes are warmer. The coolest year was 1996, at 14.1 C (57.4 F), and the warmest was 1990, at 16.2 C (61.1 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Stilwell 5 NNW as warming stripes, 1960 to 2001
Year	Annual mean temperature	Difference from the station mean
1960	14.7 C	-0.46 C
1961	14.5 C	-0.59 C
1962	15.2 C	+0.09 C
1963	15.7 C	+0.55 C
1964	15.8 C	+0.63 C
1965	15.7 C	+0.61 C
1966	14.6 C	-0.48 C
1967	15.2 C	+0.12 C
1968	14.5 C	-0.61 C
1969	15.1 C	+0.01 C
1970	15.1 C	-0.02 C
1971	15.5 C	+0.34 C
1972	15.1 C	-0.07 C
1973	15.3 C	+0.13 C
1974	15.4 C	+0.26 C
1975	15.1 C	-0.06 C
1976	14.6 C	-0.50 C
1977	15.9 C	+0.77 C
1978	15.0 C	-0.17 C
1979	14.3 C	-0.87 C
1980	16.0 C	+0.89 C
1981	15.5 C	+0.37 C
1982	15.1 C	-0.01 C
1983	14.5 C	-0.58 C
1984	15.1 C	0.00 C
1985	14.6 C	-0.49 C
1986	15.8 C	+0.65 C
1987	15.6 C	+0.50 C
1988	15.3 C	+0.13 C
1989	14.5 C	-0.60 C
1990	16.2 C	+1.07 C
1991	16.0 C	+0.84 C
1992	15.2 C	+0.10 C
1995	14.6 C	-0.50 C
1996	14.1 C	-1.03 C
1997	14.1 C	-1.02 C
1998	15.6 C	+0.46 C
1999	15.8 C	+0.67 C
2000	14.4 C	-0.71 C
2001	14.7 C	-0.41 C

The fitted trend in annual mean temperature here over 1960 to 2001 is -0.04 C (-0.19 to 0.11) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.2) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Stilwell 5 NNW
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.04 C (-0.19 to 0.11) per decade	-0.1 F (-0.3 to 0.2) per decade	1960 to 2001	40	Not clearly different from zero
Mean daily maximum	-0.1 C (-0.2 to 0.1) per decade	-0.1 F (-0.4 to 0.2) per decade	1960 to 2001	40	Not clearly different from zero
Mean daily minimum	-0.02 C (-0.19 to 0.15) per decade	-0.04 F (-0.35 to 0.27) per decade	1960 to 2001	40	Not clearly different from zero

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

1948 to 2003

Yearly extremes at Stilwell 5 NNW: 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)	1977	37.8 C (100.0 F)	44
Coldest night (TNn)	-24.4 C (-11.9 F)	1977	-16.7 C (1.9 F)	44
Wettest day (Rx1day)	163.8 mm (6.4 in)	1986	80.3 mm (3.2 in)	56
Wettest five days (Rx5day)	306.1 mm (12.1 in)	1986	127.4 mm (5.0 in)	56
Longest dry spell (CDD)	41 days	1963	21 days	56

Hottest day (TXx)

The hottest day of the year at Stilwell 5 NNW, 1948 to 2003. The record is 42.2 C (108.0 F) in 1977, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Stilwell 5 NNW by year
Year	Hottest day (TXx)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	36.7 C (98.1 F)
1961	35.0 C (95.0 F)
1962	37.8 C (100.0 F)
1963	40.6 C (105.1 F)
1964	41.7 C (107.1 F)
1965	37.8 C (100.0 F)
1966	37.8 C (100.0 F)
1967	37.8 C (100.0 F)
1968	36.7 C (98.1 F)
1969	40.0 C (104.0 F)
1970	41.1 C (106.0 F)
1971	37.8 C (100.0 F)
1972	38.9 C (102.0 F)
1973	35.6 C (96.1 F)
1974	41.1 C (106.0 F)
1975	35.6 C (96.1 F)
1976	36.7 C (98.1 F)
1977	42.2 C (108.0 F)
1978	39.4 C (102.9 F)
1979	35.0 C (95.0 F)
1980	41.7 C (107.1 F)
1981	37.8 C (100.0 F)
1982	37.2 C (99.0 F)
1983	38.9 C (102.0 F)
1984	39.4 C (102.9 F)
1985	36.7 C (98.1 F)
1986	42.2 C (108.0 F)
1987	37.8 C (100.0 F)
1988	37.8 C (100.0 F)
1989	35.6 C (96.1 F)
1990	38.3 C (100.9 F)
1991	38.3 C (100.9 F)
1992	33.9 C (93.0 F)
1993	39.4 C (102.9 F)
1994	36.1 C (97.0 F)
1995	37.2 C (99.0 F)
1996	35.0 C (95.0 F)
1997	35.0 C (95.0 F)
1998	40.0 C (104.0 F)
1999	40.0 C (104.0 F)
2000	41.1 C (106.0 F)
2001	37.8 C (100.0 F)
2002	35.6 C (96.1 F)
2003	28.3 C (82.9 F)

Coldest night (TNn)

The coldest night of the year at Stilwell 5 NNW, 1948 to 2003. The record is -24.4 C (-11.9 F) in 1977, marked on the chart; the median year is -16.7 C (1.9 F).

Coldest night (TNn) at Stilwell 5 NNW by year
Year	Coldest night (TNn)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	-13.3 C (8.1 F)
1961	-16.7 C (1.9 F)
1962	-22.2 C (-8.0 F)
1963	-22.8 C (-9.0 F)
1964	-16.7 C (1.9 F)
1965	-15.0 C (5.0 F)
1966	-18.9 C (-2.0 F)
1967	-12.8 C (9.0 F)
1968	-18.3 C (-0.9 F)
1969	-13.9 C (7.0 F)
1970	-20.0 C (-4.0 F)
1971	-20.0 C (-4.0 F)
1972	-17.2 C (1.0 F)
1973	-16.7 C (1.9 F)
1974	-15.6 C (3.9 F)
1975	-16.7 C (1.9 F)
1976	-17.8 C (0.0 F)
1977	-24.4 C (-11.9 F)
1978	-17.2 C (1.0 F)
1979	-21.1 C (-6.0 F)
1980	-15.0 C (5.0 F)
1981	-20.6 C (-5.1 F)
1982	-21.1 C (-6.0 F)
1983	-21.1 C (-6.0 F)
1984	-23.3 C (-9.9 F)
1985	-22.8 C (-9.0 F)
1986	-17.2 C (1.0 F)
1987	-10.0 C (14.0 F)
1988	-21.1 C (-6.0 F)
1989	-24.4 C (-11.9 F)
1990	-14.4 C (6.1 F)
1991	-11.1 C (12.0 F)
1992	-13.3 C (8.1 F)
1993	-15.0 C (5.0 F)
1994	-8.3 C (17.1 F)
1995	-15.0 C (5.0 F)
1996	-22.8 C (-9.0 F)
1997	-18.3 C (-0.9 F)
1998	-13.3 C (8.1 F)
1999	-15.0 C (5.0 F)
2000	-15.0 C (5.0 F)
2001	-16.7 C (1.9 F)
2002	-12.2 C (10.0 F)
2003	-7.8 C (18.0 F)

Wettest day (Rx1day)

The wettest day of the year at Stilwell 5 NNW, 1948 to 2003. The record is 163.8 mm (6.4 in) in 1986, marked on the chart; the median year is 80.3 mm (3.2 in).

Wettest day (Rx1day) at Stilwell 5 NNW by year
Year	Wettest day (Rx1day)
1948	72.1 mm (2.8 in)
1949	62.2 mm (2.4 in)
1950	113.0 mm (4.4 in)
1951	49.8 mm (2.0 in)
1952	101.9 mm (4.0 in)
1953	57.4 mm (2.3 in)
1954	88.4 mm (3.5 in)
1955	73.2 mm (2.9 in)
1956	60.5 mm (2.4 in)
1957	121.9 mm (4.8 in)
1958	57.4 mm (2.3 in)
1959	85.1 mm (3.4 in)
1960	109.7 mm (4.3 in)
1961	97.5 mm (3.8 in)
1962	51.3 mm (2.0 in)
1963	71.1 mm (2.8 in)
1964	79.5 mm (3.1 in)
1965	43.2 mm (1.7 in)
1966	69.9 mm (2.8 in)
1967	85.1 mm (3.4 in)
1968	62.7 mm (2.5 in)
1969	85.9 mm (3.4 in)
1970	90.2 mm (3.6 in)
1971	70.6 mm (2.8 in)
1972	86.1 mm (3.4 in)
1973	81.0 mm (3.2 in)
1974	91.7 mm (3.6 in)
1975	66.3 mm (2.6 in)
1976	99.6 mm (3.9 in)
1977	92.5 mm (3.6 in)
1978	90.7 mm (3.6 in)
1979	65.0 mm (2.6 in)
1980	42.9 mm (1.7 in)
1981	75.2 mm (3.0 in)
1982	85.9 mm (3.4 in)
1983	68.8 mm (2.7 in)
1984	63.2 mm (2.5 in)
1985	104.9 mm (4.1 in)
1986	163.8 mm (6.4 in)
1987	69.9 mm (2.8 in)
1988	44.2 mm (1.7 in)
1989	65.8 mm (2.6 in)
1990	118.6 mm (4.7 in)
1991	88.9 mm (3.5 in)
1992	64.3 mm (2.5 in)
1993	71.6 mm (2.8 in)
1994	112.0 mm (4.4 in)
1995	71.6 mm (2.8 in)
1996	163.8 mm (6.4 in)
1997	81.3 mm (3.2 in)
1998	143.0 mm (5.6 in)
1999	53.3 mm (2.1 in)
2000	94.0 mm (3.7 in)
2001	88.9 mm (3.5 in)
2002	82.6 mm (3.3 in)
2003	20.3 mm (0.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Stilwell 5 NNW, 1948 to 2003. The record is 306.1 mm (12.1 in) in 1986, marked on the chart; the median year is 127.4 mm (5.0 in).

Wettest five days (Rx5day) at Stilwell 5 NNW by year
Year	Wettest five days (Rx5day)
1948	72.1 mm (2.8 in)
1949	157.3 mm (6.2 in)
1950	173.7 mm (6.8 in)
1951	102.1 mm (4.0 in)
1952	136.0 mm (5.4 in)
1953	98.3 mm (3.9 in)
1954	162.4 mm (6.4 in)
1955	97.1 mm (3.8 in)
1956	75.7 mm (3.0 in)
1957	153.4 mm (6.0 in)
1958	109.7 mm (4.3 in)
1959	151.0 mm (5.9 in)
1960	191.5 mm (7.5 in)
1961	213.3 mm (8.4 in)
1962	95.2 mm (3.7 in)
1963	83.0 mm (3.3 in)
1964	174.2 mm (6.9 in)
1965	97.8 mm (3.9 in)
1966	120.2 mm (4.7 in)
1967	110.5 mm (4.4 in)
1968	95.5 mm (3.8 in)
1969	169.2 mm (6.7 in)
1970	170.7 mm (6.7 in)
1971	103.1 mm (4.1 in)
1972	169.9 mm (6.7 in)
1973	196.3 mm (7.7 in)
1974	179.1 mm (7.1 in)
1975	113.0 mm (4.4 in)
1976	182.7 mm (7.2 in)
1977	103.4 mm (4.1 in)
1978	155.8 mm (6.1 in)
1979	75.5 mm (3.0 in)
1980	89.9 mm (3.5 in)
1981	76.0 mm (3.0 in)
1982	130.9 mm (5.2 in)
1983	96.6 mm (3.8 in)
1984	123.8 mm (4.9 in)
1985	208.8 mm (8.2 in)
1986	306.1 mm (12.1 in)
1987	117.3 mm (4.6 in)
1988	76.4 mm (3.0 in)
1989	117.8 mm (4.6 in)
1990	193.5 mm (7.6 in)
1991	168.9 mm (6.6 in)
1992	102.1 mm (4.0 in)
1993	135.6 mm (5.3 in)
1994	139.7 mm (5.5 in)
1995	135.8 mm (5.3 in)
1996	224.5 mm (8.8 in)
1997	158.0 mm (6.2 in)
1998	190.8 mm (7.5 in)
1999	100.4 mm (4.0 in)
2000	165.6 mm (6.5 in)
2001	111.5 mm (4.4 in)
2002	87.4 mm (3.4 in)
2003	38.6 mm (1.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Stilwell 5 NNW, 1948 to 2003. The record is 41 days in 1963, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Stilwell 5 NNW by year
Year	Longest dry spell (CDD)
1948	11 days
1949	29 days
1950	25 days
1951	16 days
1952	24 days
1953	19 days
1954	26 days
1955	21 days
1956	21 days
1957	19 days
1958	16 days
1959	36 days
1960	30 days
1961	20 days
1962	22 days
1963	41 days
1964	21 days
1965	23 days
1966	19 days
1967	24 days
1968	22 days
1969	19 days
1970	26 days
1971	14 days
1972	37 days
1973	17 days
1974	27 days
1975	23 days
1976	20 days
1977	15 days
1978	31 days
1979	24 days
1980	22 days
1981	19 days
1982	19 days
1983	26 days
1984	16 days
1985	22 days
1986	23 days
1987	18 days
1988	17 days
1989	21 days
1990	23 days
1991	20 days
1992	21 days
1993	15 days
1994	15 days
1995	21 days
1996	24 days
1997	16 days
1998	21 days
1999	31 days
2000	37 days
2001	14 days
2002	12 days
2003	20 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

40 years with a frost

Across 40 years with a frost, the median last spring frost at Stilwell 5 NNW falls on 12 April and the median first autumn frost on 21 October, which leaves a median of 192 days between them.

Fitted over all years, the growing season changes by -1.6 days per decade at this station.

Frost dates and growing season at Stilwell 5 NNW
Measure	Median, all years	Earliest period	Recent period (1970 to 2001)	Recent against earliest	Fitted trend
Last spring frost	12 April	n/a	12 April	n/a	+0.4 days per decade
First autumn frost	21 October	n/a	21 October	n/a	-1.2 days per decade
Growing days	192 days	n/a	192 days	n/a	-1.6 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

51 years, 1949 to 2001

A day with at least 77.8 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 169.6 mm (6.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Stilwell 5 NNW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	77.8 mm (3.1 in)
5 years	101.5 mm (4.0 in)
10 years	117.5 mm (4.6 in)
25 years	138.2 mm (5.4 in)
50 years	153.8 mm (6.1 in)
100 years	169.6 mm (6.7 in)	Longer than the 51 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, 51 years of values from 1949 to 2001.

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: 163.8 mm (6.4 in) in 1986; 163.8 mm (6.4 in) in 1996; 143.0 mm (5.6 in) in 1998.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Stilwell 5 NNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Stilwell 5 NNW 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).