Douglas Caa AP Weather Records (USW00024019)

Record envelope, standing records and threshold days for Douglas Caa AP (USW00024019), Wyoming, United States, with 48 years of record.

Key Facts for Douglas Caa AP

Douglas Caa AP (USW00024019) is a weather station in Wyoming, United States at 42.75 latitude and -105.37 longitude, 1,487 m (4,879 ft) above sea level.
The station reports from 1948 to 1995, 48 years of record.
1,464 records set at Douglas Caa AP still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Douglas Caa AP set a daily record snowfall of 15.2 cm (6.0 in) on 17 January 1995.

About the Station

Location: Wyoming, United States, 42.75 latitude, -105.37 longitude.
Elevation: 1,487 m (4,879 ft).
Period of record: 1948 to 1995, 48 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 Douglas Caa AP. 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 Douglas Caa AP, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.3 C (64.9 F)	-38.9 C (-38.0 F)	n/a	n/a
Feb	20.6 C (69.1 F)	-36.1 C (-33.0 F)	n/a	n/a
Mar	25.0 C (77.0 F)	-32.8 C (-27.0 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-24.4 C (-11.9 F)	n/a	n/a
May	33.9 C (93.0 F)	-10.6 C (12.9 F)	n/a	n/a
Jun	39.4 C (102.9 F)	-2.2 C (28.0 F)	n/a	n/a
Jul	40.6 C (105.1 F)	1.1 C (34.0 F)	n/a	n/a
Aug	38.3 C (100.9 F)	-1.7 C (28.9 F)	n/a	n/a
Sep	36.1 C (97.0 F)	-11.7 C (10.9 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-21.1 C (-6.0 F)	n/a	n/a
Nov	24.4 C (75.9 F)	-31.1 C (-24.0 F)	n/a	n/a
Dec	20.0 C (68.0 F)	-40.6 C (-41.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Douglas Caa AP still stand. 1954 holds the most, with 59.

Standing records at Douglas Caa AP by the year they were set
Year set	Standing records
1948	44
1949	38
1950	44
1951	37
1952	37
1953	43
1954	59
1955	41
1956	38
1957	22
1958	35
1959	33
1960	15
1962	15
1963	39
1964	31
1965	39
1966	38
1967	31
1968	26
1969	32
1970	22
1971	22
1972	45
1973	34
1974	19
1975	31
1976	20
1977	31
1978	33
1979	22
1980	32
1981	34
1982	23
1983	31
1984	16
1985	41
1986	33
1987	25
1988	33
1989	41
1990	41
1991	15
1992	31
1993	24
1994	27
1995	1

All-Time Record Progression

5 new records

5 all-time records were set at Douglas Caa AP between 3 February 1989 and 12 December 1992. Each dot is a new record.

When Douglas Caa AP set new all-time records
Date	Kind	Detail
1989-02-03	Record low maximum temperature	Record low maximum temperature -28.9 C (-20.0 F)
1989-12-22	Record low minimum temperature	Record low minimum temperature -40.0 C (-40.0 F)
1990-03-06	Record daily snowfall	Record daily snowfall 38.6 cm (15.2 in)
1990-12-22	Record low minimum temperature	Record low minimum temperature -40.6 C (-41.1 F)
1992-12-12	Record daily snowfall	Record daily snowfall 42.7 cm (16.8 in)

Wettest Day of Each Month

Jul: 83.1 mm (3.3 in)

The wettest day on record for each calendar month at Douglas Caa AP. The most was 83.1 mm (3.3 in) on 19 July 1973.

Record daily precipitation for each month at Douglas Caa AP
Month	Record daily precipitation (mm)	Date
Jan	11.2 mm (0.4 in)	15 January 1990
Feb	14.0 mm (0.6 in)	10 February 1993
Mar	37.8 mm (1.5 in)	6 March 1990
Apr	50.0 mm (2.0 in)	6 April 1993
May	81.3 mm (3.2 in)	15 May 1991
Jun	60.2 mm (2.4 in)	9 June 1986
Jul	83.1 mm (3.3 in)	19 July 1973
Aug	27.2 mm (1.1 in)	18 August 1972
Sep	33.5 mm (1.3 in)	8 September 1989
Oct	27.9 mm (1.1 in)	6 October 1962
Nov	17.8 mm (0.7 in)	3 November 1956
Dec	17.3 mm (0.7 in)	12 December 1992

Period of Record Coverage

1948 to 1995

47 years of record at Douglas Caa AP, 1948 to 1995. 10 years have data for under 90 percent of days and are left out of rankings: 1960, 1962, 1968, 1975, 1979, 1982, 1983, 1986 and others.

Days with data per year at Douglas Caa AP
Year	Days with data	Share of year	Complete
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	364	100%	Yes
1952	365	100%	Yes
1953	365	100%	Yes
1954	363	99%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	364	100%	Yes
1959	365	100%	Yes
1960	65	18%	No
1962	153	42%	No
1963	364	100%	Yes
1964	361	99%	Yes
1965	360	99%	Yes
1966	331	91%	Yes
1967	364	100%	Yes
1968	299	82%	No
1969	354	97%	Yes
1970	364	100%	Yes
1971	363	99%	Yes
1972	364	99%	Yes
1973	355	97%	Yes
1974	353	97%	Yes
1975	316	87%	No
1976	364	99%	Yes
1977	363	99%	Yes
1978	351	96%	Yes
1979	314	86%	No
1980	344	94%	Yes
1981	364	100%	Yes
1982	208	57%	No
1983	260	71%	No
1984	339	93%	Yes
1985	335	92%	Yes
1986	309	85%	No
1987	335	92%	Yes
1988	345	94%	Yes
1989	343	94%	Yes
1990	317	87%	No
1991	333	91%	Yes
1992	342	93%	Yes
1993	332	91%	Yes
1994	338	93%	Yes
1995	31	8%	No

Latest Records

Latest records at Douglas Caa AP
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 January 1995	Douglas Caa AP, US	daily snowfall	15.2 cm (6.0 in)	6.6 cm (2.6 in)	40 years	34 of 100 (Routine)
17 January 1995	Douglas Caa AP, US	daily rain	6.1 mm (0.24 in)	2.3 mm (0.09 in)	40 years	20 of 100 (Routine)
11 January 1995	Douglas Caa AP, US	daily high min (Tie)	6.1 C (43.0 F)	tie	41 years	4 of 100 (Routine)
10 January 1995	Douglas Caa AP, US	daily high min	5.6 C (42.1 F)	2.3 C (4.1 F)	4 years	7 of 100 (Routine)
19 December 1994	Douglas Caa AP, US	daily rain	6.6 mm (0.26 in)	3.3 mm (0.13 in)	4 years	20 of 100 (Routine)
1 December 1994	Douglas Caa AP, US	daily high min	2.8 C (37.0 F)	2.2 C (4.0 F)	19 years	11 of 100 (Routine)
18 November 1994	Douglas Caa AP, US	daily low max	-3.9 C (25.0 F)	0.6 C (1.1 F)	24 years	11 of 100 (Routine)
2 November 1994	Douglas Caa AP, US	daily snow depth	10.2 cm (4.0 in)	2.6 cm (1.0 in)	39 years	18 of 100 (Routine)
1 November 1994	Douglas Caa AP, US	daily high min	5.6 C (42.1 F)	1.7 C (3.1 F)	4 years	7 of 100 (Routine)
27 October 1994	Douglas Caa AP, US	daily high min	10.6 C (51.1 F)	4.5 C (8.1 F)	1 year	13 of 100 (Routine)
15 October 1994	Douglas Caa AP, US	daily rain	10.9 mm (0.4 in)	1.2 mm (0.05 in)	45 years	19 of 100 (Routine)
30 September 1994	Douglas Caa AP, US	daily high min	10.0 C (50.0 F)	1.1 C (2.0 F)	24 years	13 of 100 (Routine)
28 September 1994	Douglas Caa AP, US	daily high max	31.1 C (88.0 F)	1.1 C (2.0 F)	24 years	12 of 100 (Routine)
31 August 1994	Douglas Caa AP, US	daily low max	12.8 C (55.0 F)	4.4 C (7.9 F)	41 years	26 of 100 (Routine)
26 August 1994	Douglas Caa AP, US	daily high max	36.1 C (97.0 F)	1.1 C (2.0 F)	28 years	14 of 100 (Routine)
13 August 1994	Douglas Caa AP, US	daily high min (Tie)	15.6 C (60.1 F)	tie	16 years	2 of 100 (Routine)
12 August 1994	Douglas Caa AP, US	daily rain	20.3 mm (0.8 in)	6.6 mm (0.26 in)	40 years	20 of 100 (Routine)
9 August 1994	Douglas Caa AP, US	daily high min (Tie)	16.7 C (62.1 F)	tie	40 years	4 of 100 (Routine)
14 July 1994	Douglas Caa AP, US	daily rain	7.9 mm (0.31 in)	2.3 mm (0.09 in)	0 years	7 of 100 (Routine)
7 July 1994	Douglas Caa AP, US	daily low max	17.2 C (63.0 F)	3.9 C (7.0 F)	41 years	25 of 100 (Routine)

Climate Trend

34 complete years, 1948 to 1994

One stripe for each of 34 complete years at Douglas Caa AP, 1948 to 1994. Blue stripes are years cooler than the station's own mean of 7.4 C (45.4 F); red stripes are warmer. The coolest year was 1993, at 6.0 C (42.8 F), and the warmest was 1981, at 9.1 C (48.4 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Douglas Caa AP as warming stripes, 1948 to 1994
Year	Annual mean temperature	Difference from the station mean
1948	7.0 C	-0.44 C
1949	7.1 C	-0.35 C
1950	6.8 C	-0.59 C
1951	6.1 C	-1.31 C
1952	7.4 C	-0.02 C
1953	8.3 C	+0.92 C
1954	9.0 C	+1.59 C
1955	6.7 C	-0.71 C
1956	7.5 C	+0.12 C
1957	7.2 C	-0.18 C
1958	7.7 C	+0.26 C
1959	7.3 C	-0.17 C
1963	8.4 C	+1.00 C
1964	7.0 C	-0.47 C
1965	7.3 C	-0.09 C
1967	7.2 C	-0.18 C
1969	7.7 C	+0.30 C
1970	7.1 C	-0.36 C
1971	7.1 C	-0.31 C
1972	6.9 C	-0.50 C
1973	6.8 C	-0.59 C
1974	7.7 C	+0.31 C
1976	7.6 C	+0.19 C
1977	8.2 C	+0.75 C
1978	6.1 C	-1.37 C
1980	7.8 C	+0.38 C
1981	9.1 C	+1.70 C
1984	7.3 C	-0.09 C
1985	6.1 C	-1.28 C
1987	7.9 C	+0.47 C
1988	8.3 C	+0.86 C
1989	7.7 C	+0.23 C
1993	6.0 C	-1.40 C
1994	8.7 C	+1.32 C

The fitted trend in annual mean temperature here over 1948 to 1994 is 0.1 C (-0.1 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.5) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Douglas Caa AP
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.1 C (-0.1 to 0.3) per decade	0.1 F (-0.2 to 0.5) per decade	1948 to 1994	34	Not clearly different from zero
Mean daily maximum	0.1 C (-0.1 to 0.3) per decade	0.2 F (-0.3 to 0.6) per decade	1948 to 1994	34	Not clearly different from zero
Mean daily minimum	0.03 C (-0.16 to 0.22) per decade	0.1 F (-0.3 to 0.4) per decade	1948 to 1994	34	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 1995

Yearly extremes at Douglas Caa AP: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1954	36.7 C (98.1 F)	47
Coldest night (TNn)	-40.6 C (-41.1 F)	1990	-31.7 C (-25.1 F)	47
Wettest day (Rx1day)	83.1 mm (3.3 in)	1973	27.2 mm (1.1 in)	47
Wettest five days (Rx5day)	118.4 mm (4.7 in)	1991	42.7 mm (1.7 in)	47
Longest dry spell (CDD)	72 days	1964	31 days	47

Hottest day (TXx)

The hottest day of the year at Douglas Caa AP, 1948 to 1995. The record is 40.6 C (105.1 F) in 1954, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at Douglas Caa AP by year
Year	Hottest day (TXx)
1948	36.7 C (98.1 F)
1949	36.7 C (98.1 F)
1950	35.0 C (95.0 F)
1951	36.7 C (98.1 F)
1952	37.8 C (100.0 F)
1953	37.8 C (100.0 F)
1954	40.6 C (105.1 F)
1955	37.8 C (100.0 F)
1956	35.6 C (96.1 F)
1957	36.7 C (98.1 F)
1958	36.1 C (97.0 F)
1959	37.2 C (99.0 F)
1960	15.0 C (59.0 F)
1962	35.0 C (95.0 F)
1963	37.8 C (100.0 F)
1964	36.7 C (98.1 F)
1965	36.7 C (98.1 F)
1966	39.4 C (102.9 F)
1967	36.1 C (97.0 F)
1968	36.7 C (98.1 F)
1969	37.2 C (99.0 F)
1970	36.7 C (98.1 F)
1971	35.6 C (96.1 F)
1972	36.7 C (98.1 F)
1973	38.3 C (100.9 F)
1974	35.6 C (96.1 F)
1975	36.7 C (98.1 F)
1976	37.2 C (99.0 F)
1977	37.2 C (99.0 F)
1978	36.1 C (97.0 F)
1979	38.3 C (100.9 F)
1980	36.7 C (98.1 F)
1981	39.4 C (102.9 F)
1982	37.8 C (100.0 F)
1983	36.7 C (98.1 F)
1984	35.0 C (95.0 F)
1985	38.3 C (100.9 F)
1986	36.1 C (97.0 F)
1987	37.8 C (100.0 F)
1988	39.4 C (102.9 F)
1989	39.4 C (102.9 F)
1990	39.4 C (102.9 F)
1991	37.2 C (99.0 F)
1992	36.7 C (98.1 F)
1993	36.1 C (97.0 F)
1994	37.8 C (100.0 F)
1995	13.9 C (57.0 F)

Coldest night (TNn)

The coldest night of the year at Douglas Caa AP, 1948 to 1995. The record is -40.6 C (-41.1 F) in 1990, marked on the chart; the median year is -31.7 C (-25.1 F).

Coldest night (TNn) at Douglas Caa AP by year
Year	Coldest night (TNn)
1948	-32.2 C (-26.0 F)
1949	-32.2 C (-26.0 F)
1950	-33.3 C (-27.9 F)
1951	-35.0 C (-31.0 F)
1952	-31.1 C (-24.0 F)
1953	-24.4 C (-11.9 F)
1954	-25.6 C (-14.1 F)
1955	-29.4 C (-20.9 F)
1956	-32.8 C (-27.0 F)
1957	-29.4 C (-20.9 F)
1958	-26.1 C (-15.0 F)
1959	-37.2 C (-35.0 F)
1960	-31.7 C (-25.1 F)
1962	-25.6 C (-14.1 F)
1963	-38.3 C (-36.9 F)
1964	-38.9 C (-38.0 F)
1965	-28.3 C (-18.9 F)
1966	-31.7 C (-25.1 F)
1967	-32.8 C (-27.0 F)
1968	-31.7 C (-25.1 F)
1969	-25.0 C (-13.0 F)
1970	-30.6 C (-23.1 F)
1971	-26.7 C (-16.1 F)
1972	-38.9 C (-38.0 F)
1973	-32.2 C (-26.0 F)
1974	-32.2 C (-26.0 F)
1975	-27.8 C (-18.0 F)
1976	-30.0 C (-22.0 F)
1977	-31.1 C (-24.0 F)
1978	-31.7 C (-25.1 F)
1979	-32.2 C (-26.0 F)
1980	-30.6 C (-23.1 F)
1981	-28.9 C (-20.0 F)
1982	-36.1 C (-33.0 F)
1983	-36.7 C (-34.1 F)
1984	-35.6 C (-32.1 F)
1985	-35.0 C (-31.0 F)
1986	-31.1 C (-24.0 F)
1987	-30.6 C (-23.1 F)
1988	-28.9 C (-20.0 F)
1989	-40.0 C (-40.0 F)
1990	-40.6 C (-41.1 F)
1991	-31.7 C (-25.1 F)
1992	-32.2 C (-26.0 F)
1993	-35.6 C (-32.1 F)
1994	-24.4 C (-11.9 F)
1995	-27.2 C (-17.0 F)

Wettest day (Rx1day)

The wettest day of the year at Douglas Caa AP, 1948 to 1995. The record is 83.1 mm (3.3 in) in 1973, marked on the chart; the median year is 27.2 mm (1.1 in).

Wettest day (Rx1day) at Douglas Caa AP by year
Year	Wettest day (Rx1day)
1948	29.2 mm (1.1 in)
1949	31.0 mm (1.2 in)
1950	23.4 mm (0.9 in)
1951	21.3 mm (0.8 in)
1952	20.3 mm (0.8 in)
1953	15.7 mm (0.6 in)
1954	13.7 mm (0.5 in)
1955	23.4 mm (0.9 in)
1956	21.8 mm (0.9 in)
1957	25.1 mm (1.0 in)
1958	25.1 mm (1.0 in)
1959	23.9 mm (0.9 in)
1960	5.8 mm (0.23 in)
1962	27.9 mm (1.1 in)
1963	25.7 mm (1.0 in)
1964	20.6 mm (0.8 in)
1965	29.2 mm (1.1 in)
1966	15.7 mm (0.6 in)
1967	31.5 mm (1.2 in)
1968	34.8 mm (1.4 in)
1969	32.5 mm (1.3 in)
1970	39.6 mm (1.6 in)
1971	45.0 mm (1.8 in)
1972	27.2 mm (1.1 in)
1973	83.1 mm (3.3 in)
1974	30.2 mm (1.2 in)
1975	25.9 mm (1.0 in)
1976	31.8 mm (1.3 in)
1977	14.5 mm (0.6 in)
1978	35.6 mm (1.4 in)
1979	18.0 mm (0.7 in)
1980	35.1 mm (1.4 in)
1981	22.9 mm (0.9 in)
1982	27.2 mm (1.1 in)
1983	36.8 mm (1.4 in)
1984	29.0 mm (1.1 in)
1985	13.0 mm (0.5 in)
1986	60.2 mm (2.4 in)
1987	18.0 mm (0.7 in)
1988	22.9 mm (0.9 in)
1989	33.5 mm (1.3 in)
1990	41.4 mm (1.6 in)
1991	81.3 mm (3.2 in)
1992	58.4 mm (2.3 in)
1993	50.0 mm (2.0 in)
1994	21.6 mm (0.9 in)
1995	6.1 mm (0.24 in)

Wettest five days (Rx5day)

The wettest five days of the year at Douglas Caa AP, 1948 to 1995. The record is 118.4 mm (4.7 in) in 1991, marked on the chart; the median year is 42.7 mm (1.7 in).

Wettest five days (Rx5day) at Douglas Caa AP by year
Year	Wettest five days (Rx5day)
1948	52.6 mm (2.1 in)
1949	46.0 mm (1.8 in)
1950	24.5 mm (1.0 in)
1951	40.4 mm (1.6 in)
1952	32.0 mm (1.3 in)
1953	24.8 mm (1.0 in)
1954	18.5 mm (0.7 in)
1955	51.9 mm (2.0 in)
1956	31.5 mm (1.2 in)
1957	45.5 mm (1.8 in)
1958	36.1 mm (1.4 in)
1959	46.5 mm (1.8 in)
1960	5.8 mm (0.23 in)
1962	33.7 mm (1.3 in)
1963	33.1 mm (1.3 in)
1964	37.6 mm (1.5 in)
1965	47.5 mm (1.9 in)
1966	18.2 mm (0.7 in)
1967	79.8 mm (3.1 in)
1968	54.6 mm (2.1 in)
1969	57.9 mm (2.3 in)
1970	67.8 mm (2.7 in)
1971	87.7 mm (3.5 in)
1972	56.0 mm (2.2 in)
1973	95.0 mm (3.7 in)
1974	30.2 mm (1.2 in)
1975	27.7 mm (1.1 in)
1976	61.8 mm (2.4 in)
1977	30.4 mm (1.2 in)
1978	52.9 mm (2.1 in)
1979	31.8 mm (1.3 in)
1980	67.3 mm (2.6 in)
1981	38.2 mm (1.5 in)
1982	42.7 mm (1.7 in)
1983	50.5 mm (2.0 in)
1984	39.7 mm (1.6 in)
1985	26.8 mm (1.1 in)
1986	70.1 mm (2.8 in)
1987	36.3 mm (1.4 in)
1988	32.3 mm (1.3 in)
1989	50.6 mm (2.0 in)
1990	64.0 mm (2.5 in)
1991	118.4 mm (4.7 in)
1992	58.9 mm (2.3 in)
1993	66.3 mm (2.6 in)
1994	36.6 mm (1.4 in)
1995	6.1 mm (0.24 in)

Longest dry spell (CDD)

The longest dry spell of the year at Douglas Caa AP, 1948 to 1995. The record is 72 days in 1964, marked on the chart; the median year is 31 days.

Longest dry spell (CDD) at Douglas Caa AP by year
Year	Longest dry spell (CDD)
1948	34 days
1949	24 days
1950	31 days
1951	54 days
1952	32 days
1953	42 days
1954	31 days
1955	27 days
1956	43 days
1957	36 days
1958	47 days
1959	41 days
1960	15 days
1962	34 days
1963	29 days
1964	72 days
1965	34 days
1966	29 days
1967	28 days
1968	21 days
1969	51 days
1970	33 days
1971	34 days
1972	21 days
1973	27 days
1974	31 days
1975	28 days
1976	29 days
1977	38 days
1978	33 days
1979	21 days
1980	44 days
1981	43 days
1982	33 days
1983	26 days
1984	34 days
1985	21 days
1986	23 days
1987	30 days
1988	40 days
1989	34 days
1990	25 days
1991	19 days
1992	37 days
1993	22 days
1994	28 days
1995	16 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

34 years with a frost

Across 34 years with a frost, the median last spring frost at Douglas Caa AP falls on 21 May and the median first autumn frost on 17 September, which leaves a median of 117 days between them.

Fitted over all years, the growing season changes by -0.9 days per decade at this station.

Frost dates and growing season at Douglas Caa AP
Measure	Median, all years	Earliest period	Recent period (1952 to 1994)	Recent against earliest	Fitted trend
Last spring frost	21 May	n/a	21 May	n/a	+1.3 days per decade
First autumn frost	17 September	n/a	17 September	n/a	+0.3 days per decade
Growing days	117 days	n/a	116 days	n/a	-0.9 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

41 years, 1948 to 1994

A day with at least 26.4 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 98.5 mm (3.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Douglas Caa AP: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	26.4 mm (1.0 in)
5 years	38.7 mm (1.5 in)
10 years	49.1 mm (1.9 in)
25 years	65.5 mm (2.6 in)
50 years	80.6 mm (3.2 in)	Longer than the 41 years of record
100 years	98.5 mm (3.9 in)	Longer than the 41 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, 41 years of values from 1948 to 1994.

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: 83.1 mm (3.3 in) in 1973; 81.3 mm (3.2 in) in 1991; 60.2 mm (2.4 in) in 1986.

Download the Data

Data for Douglas Caa AP standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Douglas Caa AP 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.

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