Ft Lupton 2 SE Weather Records (USC00053027)

Record envelope, standing records and threshold days for Ft Lupton 2 SE (USC00053027), Colorado, United States, with 67 years of record.

Key Facts for Ft Lupton 2 SE

Ft Lupton 2 SE (USC00053027) is a weather station in Colorado, United States at 40.07 latitude and -104.78 longitude, 1,531 m (5,023 ft) above sea level.
The station reports from 1910 to 1976, 67 years of record.
1,464 records set at Ft Lupton 2 SE still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Ft Lupton 2 SE set a daily record snowfall of 6.4 cm (2.5 in) on 29 March 1976.

About the Station

Location: Colorado, United States, 40.07 latitude, -104.78 longitude.
Elevation: 1,531 m (5,023 ft).
Period of record: 1910 to 1976, 67 years.
Eligible elements: tmax, tmin, prcp, snow.

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 Ft Lupton 2 SE. 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 Ft Lupton 2 SE, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	21.1 C (70.0 F)	-33.3 C (-27.9 F)	n/a	n/a
Feb	24.4 C (75.9 F)	-38.3 C (-36.9 F)	n/a	n/a
Mar	28.3 C (82.9 F)	-28.3 C (-18.9 F)	n/a	n/a
Apr	31.1 C (88.0 F)	-21.7 C (-7.1 F)	n/a	n/a
May	35.0 C (95.0 F)	-7.2 C (19.0 F)	n/a	n/a
Jun	42.2 C (108.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	41.7 C (107.1 F)	3.9 C (39.0 F)	n/a	n/a
Aug	40.6 C (105.1 F)	2.8 C (37.0 F)	n/a	n/a
Sep	39.4 C (102.9 F)	-7.8 C (18.0 F)	n/a	n/a
Oct	33.3 C (91.9 F)	-18.3 C (-0.9 F)	n/a	n/a
Nov	26.1 C (79.0 F)	-25.6 C (-14.1 F)	n/a	n/a
Dec	23.3 C (73.9 F)	-35.6 C (-32.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ft Lupton 2 SE still stand. 1954 holds the most, with 51.

Standing records at Ft Lupton 2 SE by the year they were set
Year set	Standing records
1919	29
1920	18
1921	30
1922	11
1923	22
1924	29
1925	23
1926	24
1927	26
1928	20
1929	26
1930	30
1931	34
1932	36
1933	36
1934	31
1935	21
1936	45
1937	23
1938	27
1939	27
1940	21
1941	15
1942	18
1943	25
1944	10
1945	29
1946	30
1947	31
1948	35
1949	26
1950	37
1951	29
1952	29
1953	34
1954	51
1955	26
1956	20
1957	7
1958	16
1959	15
1960	26
1961	5
1962	33
1963	28
1964	21
1965	27
1966	14
1967	13
1968	18
1969	25
1970	13
1971	21
1972	41
1973	19
1974	25
1975	46
1976	17

All-Time Record Progression

4 new records

4 all-time records were set at Ft Lupton 2 SE between 21 March 1944 and 23 June 1954. Each dot is a new record.

When Ft Lupton 2 SE set new all-time records
Date	Kind	Detail
1944-03-21	Record daily snowfall	Record daily snowfall 31.2 cm (12.3 in)
1944-04-10	Record daily snowfall	Record daily snowfall 38.1 cm (15.0 in)
1951-02-01	Record low minimum temperature	Record low minimum temperature -38.3 C (-36.9 F)
1954-06-23	Record high maximum temperature	Record high maximum temperature 42.2 C (108.0 F)

Wettest Day of Each Month

Sep: 96.5 mm (3.8 in)

The wettest day on record for each calendar month at Ft Lupton 2 SE. The most was 96.5 mm (3.8 in) on 3 September 1938.

Record daily precipitation for each month at Ft Lupton 2 SE
Month	Record daily precipitation (mm)	Date
Jan	20.8 mm (0.8 in)	29 January 1949
Feb	16.5 mm (0.6 in)	8 February 1942
Mar	25.7 mm (1.0 in)	24 March 1949
Apr	55.9 mm (2.2 in)	13 April 1967
May	93.0 mm (3.7 in)	15 May 1949
Jun	57.2 mm (2.3 in)	8 June 1974
Jul	38.1 mm (1.5 in)	24 July 1965
Aug	64.8 mm (2.6 in)	12 August 1941
Sep	96.5 mm (3.8 in)	3 September 1938
Oct	83.8 mm (3.3 in)	15 October 1916
Nov	24.1 mm (0.9 in)	25 November 1944
Dec	34.0 mm (1.3 in)	4 December 1913

Period of Record Coverage

1919 to 1976

58 years of record at Ft Lupton 2 SE, 1919 to 1976. 8 years have data for under 90 percent of days and are left out of rankings: 1919, 1946, 1947, 1948, 1949, 1952, 1957, 1976.

Days with data per year at Ft Lupton 2 SE
Year	Days with data	Share of year	Complete
1919	267	73%	No
1920	364	99%	Yes
1921	365	100%	Yes
1922	365	100%	Yes
1923	365	100%	Yes
1924	366	100%	Yes
1925	364	100%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	364	99%	Yes
1929	363	99%	Yes
1930	365	100%	Yes
1931	364	100%	Yes
1932	364	99%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	364	100%	Yes
1938	364	100%	Yes
1939	365	100%	Yes
1940	365	100%	Yes
1941	363	99%	Yes
1942	362	99%	Yes
1943	364	100%	Yes
1944	365	100%	Yes
1945	364	100%	Yes
1946	302	83%	No
1947	278	76%	No
1948	271	74%	No
1949	311	85%	No
1950	343	94%	Yes
1951	336	92%	Yes
1952	326	89%	No
1953	338	93%	Yes
1954	355	97%	Yes
1955	342	94%	Yes
1956	341	93%	Yes
1957	220	60%	No
1958	364	100%	Yes
1959	360	99%	Yes
1960	356	97%	Yes
1961	363	99%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	358	98%	Yes
1965	363	99%	Yes
1966	362	99%	Yes
1967	362	99%	Yes
1968	356	97%	Yes
1969	362	99%	Yes
1970	355	97%	Yes
1971	357	98%	Yes
1972	365	100%	Yes
1973	335	92%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	91	25%	No

Latest Records

Latest records at Ft Lupton 2 SE
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 March 1976	Ft Lupton 2 SE, US	daily snowfall	6.4 cm (2.5 in)	1.3 cm (0.5 in)	27 years	17 of 100 (Routine)
24 March 1976	Ft Lupton 2 SE, US	monthly high min	11.7 C (53.1 F)	0.6 C (1.1 F)	1 year	17 of 100 (Routine)
23 March 1976	Ft Lupton 2 SE, US	daily high min	9.4 C (48.9 F)	2.7 C (4.9 F)	37 years	22 of 100 (Routine)
23 March 1976	Ft Lupton 2 SE, US	daily high max	22.8 C (73.0 F)	0.6 C (1.1 F)	51 years	20 of 100 (Routine)
18 March 1976	Ft Lupton 2 SE, US	daily high min	8.3 C (46.9 F)	3.3 C (5.9 F)	55 years	28 of 100 (Routine)
17 March 1976	Ft Lupton 2 SE, US	daily high min	7.2 C (45.0 F)	2.2 C (4.0 F)	55 years	26 of 100 (Routine)
5 March 1976	Ft Lupton 2 SE, US	daily low min	-26.7 C (-16.1 F)	2.3 C (4.1 F)	28 years	18 of 100 (Routine)
4 March 1976	Ft Lupton 2 SE, US	daily snowfall	10.2 cm (4.0 in)	5.1 cm (2.0 in)	57 years	35 of 100 (Notable)
4 March 1976	Ft Lupton 2 SE, US	daily rain	7.1 mm (0.28 in)	2.5 mm (0.10 in)	57 years	20 of 100 (Routine)
4 March 1976	Ft Lupton 2 SE, US	daily low max	-6.7 C (19.9 F)	0.6 C (1.1 F)	16 years	9 of 100 (Routine)
3 March 1976	Ft Lupton 2 SE, US	daily snowfall	7.6 cm (3.0 in)	2.5 cm (1.0 in)	61 years	29 of 100 (Routine)
3 March 1976	Ft Lupton 2 SE, US	daily low max	-6.1 C (21.0 F)	0.5 C (0.9 F)	22 years	11 of 100 (Routine)
26 February 1976	Ft Lupton 2 SE, US	daily high min	6.1 C (43.0 F)	3.3 C (5.9 F)	17 years	16 of 100 (Routine)
25 February 1976	Ft Lupton 2 SE, US	daily high min	2.8 C (37.0 F)	1.1 C (2.0 F)	17 years	12 of 100 (Routine)
24 February 1976	Ft Lupton 2 SE, US	daily high min	6.1 C (43.0 F)	3.9 C (7.0 F)	0 years	12 of 100 (Routine)
16 February 1976	Ft Lupton 2 SE, US	daily high min	2.2 C (36.0 F)	0.5 C (0.9 F)	44 years	19 of 100 (Routine)
15 February 1976	Ft Lupton 2 SE, US	daily high max	20.0 C (68.0 F)	2.8 C (5.0 F)	4 years	10 of 100 (Routine)
15 February 1976	Ft Lupton 2 SE, US	daily high min	2.2 C (36.0 F)	2.2 C (4.0 F)	4 years	10 of 100 (Routine)
14 February 1976	Ft Lupton 2 SE, US	daily high min	3.3 C (37.9 F)	3.9 C (7.0 F)	41 years	24 of 100 (Routine)
9 February 1976	Ft Lupton 2 SE, US	daily high min	4.4 C (39.9 F)	2.2 C (4.0 F)	16 years	13 of 100 (Routine)

Climate Trend

47 complete years, 1920 to 1975

One stripe for each of 47 complete years at Ft Lupton 2 SE, 1920 to 1975. Blue stripes are years cooler than the station's own mean of 9.5 C (49.1 F); red stripes are warmer. The coolest year was 1929, at 8.1 C (46.6 F), and the warmest was 1954, at 12.0 C (53.6 F). The strongest colour marks a difference of 2.5 C (4.5 F).

Annual mean temperature at Ft Lupton 2 SE as warming stripes, 1920 to 1975
Year	Annual mean temperature	Difference from the station mean
1920	8.9 C	-0.61 C
1921	10.3 C	+0.76 C
1922	9.4 C	-0.14 C
1923	8.7 C	-0.85 C
1924	8.4 C	-1.09 C
1925	9.8 C	+0.32 C
1926	9.3 C	-0.21 C
1927	9.2 C	-0.29 C
1928	8.7 C	-0.79 C
1929	8.1 C	-1.40 C
1930	9.0 C	-0.56 C
1931	10.1 C	+0.62 C
1932	9.1 C	-0.40 C
1933	10.7 C	+1.22 C
1934	11.7 C	+2.21 C
1935	9.9 C	+0.36 C
1936	10.2 C	+0.68 C
1937	9.0 C	-0.51 C
1938	10.0 C	+0.46 C
1939	10.2 C	+0.64 C
1940	9.8 C	+0.25 C
1941	9.5 C	+0.01 C
1942	8.6 C	-0.94 C
1943	10.1 C	+0.60 C
1944	9.1 C	-0.44 C
1945	9.0 C	-0.48 C
1950	9.9 C	+0.34 C
1951	8.7 C	-0.86 C
1953	11.4 C	+1.89 C
1954	12.0 C	+2.49 C
1955	9.7 C	+0.23 C
1958	10.6 C	+1.11 C
1960	9.7 C	+0.23 C
1961	9.5 C	+0.02 C
1962	9.4 C	-0.12 C
1963	10.1 C	+0.62 C
1964	9.6 C	+0.06 C
1965	9.1 C	-0.42 C
1966	8.7 C	-0.82 C
1967	8.6 C	-0.89 C
1968	8.7 C	-0.84 C
1969	9.0 C	-0.47 C
1970	8.9 C	-0.62 C
1971	8.7 C	-0.81 C
1972	8.9 C	-0.59 C
1974	9.6 C	+0.05 C
1975	9.4 C	-0.16 C

The fitted trend in annual mean temperature here over 1920 to 1975 is -0.02 C (-0.17 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.04 F (-0.31 to 0.22) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Ft Lupton 2 SE
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.02 C (-0.17 to 0.12) per decade	-0.04 F (-0.31 to 0.22) per decade	1920 to 1975	47	Not clearly different from zero
Mean daily maximum	0.3 C (0.1 to 0.5) per decade	0.5 F (0.1 to 0.8) per decade	1920 to 1975	47	Rise
Mean daily minimum	-0.3 C (-0.5 to -0.2) per decade	-0.6 F (-0.8 to -0.3) per decade	1920 to 1975	47	Fall

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

1910 to 1976

Yearly extremes at Ft Lupton 2 SE: 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)	1954	38.3 C (100.9 F)	58
Coldest night (TNn)	-38.3 C (-36.9 F)	1951	-26.1 C (-15.0 F)	59
Wettest day (Rx1day)	96.5 mm (3.8 in)	1938	33.5 mm (1.3 in)	67
Wettest five days (Rx5day)	135.6 mm (5.3 in)	1949	49.5 mm (1.9 in)	67
Longest dry spell (CDD)	97 days	1934	38 days	67

Hottest day (TXx)

The hottest day of the year at Ft Lupton 2 SE, 1910 to 1976. The record is 42.2 C (108.0 F) in 1954, marked on the chart; the median year is 38.3 C (100.9 F).

Hottest day (TXx) at Ft Lupton 2 SE by year
Year	Hottest day (TXx)
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	40.0 C (104.0 F)
1920	37.2 C (99.0 F)
1921	38.3 C (100.9 F)
1922	40.0 C (104.0 F)
1923	36.7 C (98.1 F)
1924	37.8 C (100.0 F)
1925	39.4 C (102.9 F)
1926	37.2 C (99.0 F)
1927	36.7 C (98.1 F)
1928	36.1 C (97.0 F)
1929	37.2 C (99.0 F)
1930	39.4 C (102.9 F)
1931	41.1 C (106.0 F)
1932	38.9 C (102.0 F)
1933	39.4 C (102.9 F)
1934	41.1 C (106.0 F)
1935	37.2 C (99.0 F)
1936	40.6 C (105.1 F)
1937	38.9 C (102.0 F)
1938	40.6 C (105.1 F)
1939	41.1 C (106.0 F)
1940	41.1 C (106.0 F)
1941	37.8 C (100.0 F)
1942	37.8 C (100.0 F)
1943	37.8 C (100.0 F)
1944	39.4 C (102.9 F)
1945	38.3 C (100.9 F)
1946	38.9 C (102.0 F)
1947	40.6 C (105.1 F)
1948	41.1 C (106.0 F)
1949	37.8 C (100.0 F)
1950	35.6 C (96.1 F)
1951	38.3 C (100.9 F)
1952	40.0 C (104.0 F)
1953	40.6 C (105.1 F)
1954	42.2 C (108.0 F)
1955	38.9 C (102.0 F)
1956	39.4 C (102.9 F)
1957	37.8 C (100.0 F)
1958	36.1 C (97.0 F)
1959	36.7 C (98.1 F)
1960	36.7 C (98.1 F)
1961	35.0 C (95.0 F)
1962	38.3 C (100.9 F)
1963	38.9 C (102.0 F)
1964	38.3 C (100.9 F)
1965	36.7 C (98.1 F)
1966	37.2 C (99.0 F)
1967	35.0 C (95.0 F)
1968	36.7 C (98.1 F)
1969	38.3 C (100.9 F)
1970	37.2 C (99.0 F)
1971	37.8 C (100.0 F)
1972	38.9 C (102.0 F)
1973	41.1 C (106.0 F)
1974	36.7 C (98.1 F)
1975	38.3 C (100.9 F)
1976	22.8 C (73.0 F)

Coldest night (TNn)

The coldest night of the year at Ft Lupton 2 SE, 1910 to 1976. The record is -38.3 C (-36.9 F) in 1951, marked on the chart; the median year is -26.1 C (-15.0 F).

Coldest night (TNn) at Ft Lupton 2 SE by year
Year	Coldest night (TNn)
1910	-4.4 C (24.1 F)
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	-30.6 C (-23.1 F)
1920	-23.9 C (-11.0 F)
1921	-19.4 C (-2.9 F)
1922	-26.1 C (-15.0 F)
1923	-27.8 C (-18.0 F)
1924	-31.7 C (-25.1 F)
1925	-22.2 C (-8.0 F)
1926	-28.9 C (-20.0 F)
1927	-25.6 C (-14.1 F)
1928	-28.3 C (-18.9 F)
1929	-26.7 C (-16.1 F)
1930	-33.3 C (-27.9 F)
1931	-18.9 C (-2.0 F)
1932	-31.7 C (-25.1 F)
1933	-31.1 C (-24.0 F)
1934	-17.8 C (0.0 F)
1935	-30.0 C (-22.0 F)
1936	-35.0 C (-31.0 F)
1937	-28.3 C (-18.9 F)
1938	-20.0 C (-4.0 F)
1939	-23.9 C (-11.0 F)
1940	-25.6 C (-14.1 F)
1941	-22.8 C (-9.0 F)
1942	-31.1 C (-24.0 F)
1943	-28.3 C (-18.9 F)
1944	-19.4 C (-2.9 F)
1945	-23.9 C (-11.0 F)
1946	-18.3 C (-0.9 F)
1947	-23.3 C (-9.9 F)
1948	-32.2 C (-26.0 F)
1949	-25.0 C (-13.0 F)
1950	-27.2 C (-17.0 F)
1951	-38.3 C (-36.9 F)
1952	-24.4 C (-11.9 F)
1953	-20.6 C (-5.1 F)
1954	-24.4 C (-11.9 F)
1955	-22.8 C (-9.0 F)
1956	-25.0 C (-13.0 F)
1957	-14.4 C (6.1 F)
1958	-22.2 C (-8.0 F)
1959	-27.8 C (-18.0 F)
1960	-26.1 C (-15.0 F)
1961	-25.0 C (-13.0 F)
1962	-32.8 C (-27.0 F)
1963	-32.8 C (-27.0 F)
1964	-25.6 C (-14.1 F)
1965	-25.6 C (-14.1 F)
1966	-27.8 C (-18.0 F)
1967	-27.8 C (-18.0 F)
1968	-26.1 C (-15.0 F)
1969	-25.0 C (-13.0 F)
1970	-25.0 C (-13.0 F)
1971	-33.3 C (-27.9 F)
1972	-35.6 C (-32.1 F)
1973	-24.4 C (-11.9 F)
1974	-30.0 C (-22.0 F)
1975	-26.7 C (-16.1 F)
1976	-26.7 C (-16.1 F)

Wettest day (Rx1day)

The wettest day of the year at Ft Lupton 2 SE, 1910 to 1976. The record is 96.5 mm (3.8 in) in 1938, marked on the chart; the median year is 33.5 mm (1.3 in).

Wettest day (Rx1day) at Ft Lupton 2 SE by year
Year	Wettest day (Rx1day)
1910	13.2 mm (0.5 in)
1911	25.1 mm (1.0 in)
1912	34.5 mm (1.4 in)
1913	34.0 mm (1.3 in)
1914	49.0 mm (1.9 in)
1915	35.6 mm (1.4 in)
1916	83.8 mm (3.3 in)
1917	33.5 mm (1.3 in)
1918	32.0 mm (1.3 in)
1919	15.2 mm (0.6 in)
1920	27.9 mm (1.1 in)
1921	37.6 mm (1.5 in)
1922	22.6 mm (0.9 in)
1923	53.8 mm (2.1 in)
1924	30.0 mm (1.2 in)
1925	22.4 mm (0.9 in)
1926	27.9 mm (1.1 in)
1927	22.4 mm (0.9 in)
1928	38.6 mm (1.5 in)
1929	22.1 mm (0.9 in)
1930	29.5 mm (1.2 in)
1931	25.4 mm (1.0 in)
1932	18.3 mm (0.7 in)
1933	30.0 mm (1.2 in)
1934	18.3 mm (0.7 in)
1935	37.6 mm (1.5 in)
1936	33.0 mm (1.3 in)
1937	29.7 mm (1.2 in)
1938	96.5 mm (3.8 in)
1939	12.7 mm (0.5 in)
1940	27.2 mm (1.1 in)
1941	64.8 mm (2.6 in)
1942	40.1 mm (1.6 in)
1943	18.0 mm (0.7 in)
1944	39.6 mm (1.6 in)
1945	47.8 mm (1.9 in)
1946	33.3 mm (1.3 in)
1947	35.6 mm (1.4 in)
1948	26.7 mm (1.1 in)
1949	93.0 mm (3.7 in)
1950	27.9 mm (1.1 in)
1951	37.6 mm (1.5 in)
1952	28.2 mm (1.1 in)
1953	30.0 mm (1.2 in)
1954	35.6 mm (1.4 in)
1955	55.9 mm (2.2 in)
1956	23.4 mm (0.9 in)
1957	14.0 mm (0.6 in)
1958	41.7 mm (1.6 in)
1959	25.4 mm (1.0 in)
1960	43.4 mm (1.7 in)
1961	52.1 mm (2.1 in)
1962	13.2 mm (0.5 in)
1963	44.5 mm (1.8 in)
1964	34.3 mm (1.4 in)
1965	38.1 mm (1.5 in)
1966	25.9 mm (1.0 in)
1967	55.9 mm (2.2 in)
1968	22.6 mm (0.9 in)
1969	36.8 mm (1.4 in)
1970	46.5 mm (1.8 in)
1971	36.8 mm (1.4 in)
1972	39.9 mm (1.6 in)
1973	51.3 mm (2.0 in)
1974	57.2 mm (2.3 in)
1975	55.9 mm (2.2 in)
1976	7.1 mm (0.28 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ft Lupton 2 SE, 1910 to 1976. The record is 135.6 mm (5.3 in) in 1949, marked on the chart; the median year is 49.5 mm (1.9 in).

Wettest five days (Rx5day) at Ft Lupton 2 SE by year
Year	Wettest five days (Rx5day)
1910	15.5 mm (0.6 in)
1911	41.2 mm (1.6 in)
1912	82.2 mm (3.2 in)
1913	90.4 mm (3.6 in)
1914	62.0 mm (2.4 in)
1915	94.1 mm (3.7 in)
1916	85.1 mm (3.4 in)
1917	35.0 mm (1.4 in)
1918	52.3 mm (2.1 in)
1919	21.1 mm (0.8 in)
1920	32.8 mm (1.3 in)
1921	77.4 mm (3.0 in)
1922	45.4 mm (1.8 in)
1923	82.0 mm (3.2 in)
1924	57.2 mm (2.3 in)
1925	32.6 mm (1.3 in)
1926	45.9 mm (1.8 in)
1927	32.2 mm (1.3 in)
1928	71.9 mm (2.8 in)
1929	24.6 mm (1.0 in)
1930	49.8 mm (2.0 in)
1931	33.8 mm (1.3 in)
1932	30.9 mm (1.2 in)
1933	47.7 mm (1.9 in)
1934	30.5 mm (1.2 in)
1935	83.6 mm (3.3 in)
1936	36.1 mm (1.4 in)
1937	36.3 mm (1.4 in)
1938	104.2 mm (4.1 in)
1939	22.9 mm (0.9 in)
1940	54.1 mm (2.1 in)
1941	72.7 mm (2.9 in)
1942	54.2 mm (2.1 in)
1943	52.8 mm (2.1 in)
1944	50.7 mm (2.0 in)
1945	73.3 mm (2.9 in)
1946	49.3 mm (1.9 in)
1947	51.6 mm (2.0 in)
1948	41.9 mm (1.6 in)
1949	135.6 mm (5.3 in)
1950	37.0 mm (1.5 in)
1951	55.1 mm (2.2 in)
1952	45.8 mm (1.8 in)
1953	36.4 mm (1.4 in)
1954	38.4 mm (1.5 in)
1955	58.2 mm (2.3 in)
1956	30.0 mm (1.2 in)
1957	21.2 mm (0.8 in)
1958	76.2 mm (3.0 in)
1959	48.1 mm (1.9 in)
1960	46.0 mm (1.8 in)
1961	77.8 mm (3.1 in)
1962	24.9 mm (1.0 in)
1963	46.6 mm (1.8 in)
1964	54.7 mm (2.2 in)
1965	66.9 mm (2.6 in)
1966	37.8 mm (1.5 in)
1967	76.2 mm (3.0 in)
1968	26.9 mm (1.1 in)
1969	74.6 mm (2.9 in)
1970	84.6 mm (3.3 in)
1971	49.5 mm (1.9 in)
1972	48.8 mm (1.9 in)
1973	52.6 mm (2.1 in)
1974	63.8 mm (2.5 in)
1975	82.8 mm (3.3 in)
1976	10.2 mm (0.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ft Lupton 2 SE, 1910 to 1976. The record is 97 days in 1934, marked on the chart; the median year is 38 days.

Longest dry spell (CDD) at Ft Lupton 2 SE by year
Year	Longest dry spell (CDD)
1910	26 days
1911	47 days
1912	22 days
1913	44 days
1914	60 days
1915	32 days
1916	55 days
1917	44 days
1918	21 days
1919	49 days
1920	37 days
1921	40 days
1922	38 days
1923	32 days
1924	33 days
1925	42 days
1926	34 days
1927	40 days
1928	41 days
1929	30 days
1930	58 days
1931	42 days
1932	45 days
1933	41 days
1934	97 days
1935	51 days
1936	51 days
1937	34 days
1938	25 days
1939	56 days
1940	38 days
1941	34 days
1942	34 days
1943	61 days
1944	36 days
1945	30 days
1946	33 days
1947	28 days
1948	31 days
1949	51 days
1950	30 days
1951	41 days
1952	53 days
1953	52 days
1954	30 days
1955	28 days
1956	65 days
1957	46 days
1958	28 days
1959	62 days
1960	22 days
1961	34 days
1962	40 days
1963	45 days
1964	47 days
1965	55 days
1966	38 days
1967	25 days
1968	29 days
1969	35 days
1970	68 days
1971	63 days
1972	31 days
1973	22 days
1974	37 days
1975	37 days
1976	23 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

47 years with a frost

Across 47 years with a frost, the median last spring frost at Ft Lupton 2 SE falls on 14 May and the median first autumn frost on 30 September, which leaves a median of 138 days between them.

Fitted over all years, the growing season changes by -4.9 days per decade at this station.

Frost dates and growing season at Ft Lupton 2 SE
Measure	Median, all years	Earliest period	Recent period (1937 to 1975)	Recent against earliest	Fitted trend
Last spring frost	14 May	n/a	14 May	n/a	+2.7 days per decade
First autumn frost	30 September	n/a	1 October	n/a	-2.2 days per decade
Growing days	138 days	n/a	134 days	n/a	-4.9 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

59 years, 1911 to 1975

A day with at least 33.5 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 88.4 mm (3.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Ft Lupton 2 SE: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	33.5 mm (1.3 in)
5 years	47.0 mm (1.9 in)
10 years	56.4 mm (2.2 in)
25 years	68.8 mm (2.7 in)
50 years	78.5 mm (3.1 in)
100 years	88.4 mm (3.5 in)	Longer than the 59 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, 59 years of values from 1911 to 1975.

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: 96.5 mm (3.8 in) in 1938; 83.8 mm (3.3 in) in 1916; 64.8 mm (2.6 in) in 1941.

Station Changes

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

Download the Data

Data for Ft Lupton 2 SE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ft Lupton 2 SE 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).