Nunn Weather Records (USC00056023)

Record envelope, standing records and threshold days for Nunn (USC00056023), Colorado, United States, with 50 years of record.

Key Facts for Nunn

Nunn (USC00056023) is a weather station in Colorado, United States at 40.71 latitude and -104.78 longitude, 1,584 m (5,196 ft) above sea level.
The station reports from 1948 to 1997, 50 years of record.
1,464 records set at Nunn still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Colorado, United States, 40.71 latitude, -104.78 longitude.
Elevation: 1,584 m (5,196 ft).
Period of record: 1948 to 1997, 50 years.
Eligible elements: none yet.

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 Nunn. 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 Nunn, 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	23.3 C (73.9 F)	-37.2 C (-35.0 F)	n/a	n/a
Mar	26.1 C (79.0 F)	-21.1 C (-6.0 F)	n/a	n/a
Apr	31.1 C (88.0 F)	-15.6 C (3.9 F)	n/a	n/a
May	33.9 C (93.0 F)	-5.6 C (21.9 F)	n/a	n/a
Jun	40.0 C (104.0 F)	1.1 C (34.0 F)	n/a	n/a
Jul	41.1 C (106.0 F)	5.0 C (41.0 F)	n/a	n/a
Aug	38.9 C (102.0 F)	3.9 C (39.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	-8.9 C (16.0 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-18.3 C (-0.9 F)	n/a	n/a
Nov	23.9 C (75.0 F)	-27.2 C (-17.0 F)	n/a	n/a
Dec	23.3 C (73.9 F)	-37.2 C (-35.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Nunn still stand. 1983 holds the most, with 112.

Wettest Day of Each Month

Aug: 83.8 mm (3.3 in)

The wettest day on record for each calendar month at Nunn. The most was 83.8 mm (3.3 in) on 10 August 1987.

Record daily precipitation for each month at Nunn
Month	Record daily precipitation (mm)	Date
Jan	9.1 mm (0.36 in)	26 January 1994
Feb	7.9 mm (0.31 in)	27 February 1987
Mar	40.1 mm (1.6 in)	6 March 1990
Apr	38.4 mm (1.5 in)	12 April 1983
May	40.1 mm (1.6 in)	13 May 1982
Jun	60.5 mm (2.4 in)	26 June 1988
Jul	47.0 mm (1.9 in)	27 July 1982
Aug	83.8 mm (3.3 in)	10 August 1987
Sep	30.2 mm (1.2 in)	9 September 1989
Oct	36.6 mm (1.4 in)	5 October 1984
Nov	17.0 mm (0.7 in)	1 November 1986
Dec	8.6 mm (0.34 in)	9 December 1985

Period of Record Coverage

1980 to 1997

18 years of record at Nunn, 1980 to 1997. 2 years have data for under 90 percent of days and are left out of rankings: 1980, 1997.

Days with data per year at Nunn
Year	Days with data	Share of year	Complete
1980	237	65%	No
1981	365	100%	Yes
1982	365	100%	Yes
1983	364	100%	Yes
1984	364	99%	Yes
1985	364	100%	Yes
1986	364	100%	Yes
1987	363	99%	Yes
1988	366	100%	Yes
1989	359	98%	Yes
1990	363	99%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	365	100%	Yes
1997	31	8%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

16 complete years, 1981 to 1996

One stripe for each of 16 complete years at Nunn, 1981 to 1996. Blue stripes are years cooler than the station's own mean of 8.5 C (47.3 F); red stripes are warmer. The coolest year was 1985, at 7.2 C (45.0 F), and the warmest was 1981, at 9.6 C (49.2 F). The strongest colour marks a difference of 1.3 C (2.3 F).

Annual mean temperature at Nunn as warming stripes, 1981 to 1996
Year	Annual mean temperature	Difference from the station mean
1981	9.6 C	+1.10 C
1982	7.8 C	-0.66 C
1983	8.0 C	-0.46 C
1984	8.0 C	-0.46 C
1985	7.2 C	-1.26 C
1986	9.3 C	+0.83 C
1987	8.9 C	+0.45 C
1988	8.7 C	+0.17 C
1989	8.3 C	-0.23 C
1990	8.6 C	+0.13 C
1991	8.7 C	+0.20 C
1992	8.7 C	+0.22 C
1993	7.5 C	-0.98 C
1994	9.4 C	+0.89 C
1995	8.5 C	-0.01 C
1996	8.6 C	+0.11 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

1948 to 1997

Yearly extremes at Nunn: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.1 C (106.0 F)	1989	38.1 C (100.5 F)	18
Coldest night (TNn)	-37.2 C (-35.0 F)	1989	-28.6 C (-19.5 F)	18
Wettest day (Rx1day)	83.8 mm (3.3 in)	1987	36.4 mm (1.4 in)	22
Wettest five days (Rx5day)	88.9 mm (3.5 in)	1982	52.4 mm (2.1 in)	22
Longest dry spell (CDD)	72 days	1991	40 days	22

Hottest day (TXx)

The hottest day of the year at Nunn, 1948 to 1997. The record is 41.1 C (106.0 F) in 1989, marked on the chart; the median year is 38.1 C (100.5 F).

Hottest day (TXx) at Nunn by year
Year	Hottest day (TXx)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1980	38.3 C (100.9 F)
1981	38.3 C (100.9 F)
1982	38.3 C (100.9 F)
1983	37.8 C (100.0 F)
1984	37.2 C (99.0 F)
1985	38.3 C (100.9 F)
1986	37.8 C (100.0 F)
1987	37.8 C (100.0 F)
1988	38.9 C (102.0 F)
1989	41.1 C (106.0 F)
1990	40.0 C (104.0 F)
1991	37.8 C (100.0 F)
1992	36.1 C (97.0 F)
1993	37.2 C (99.0 F)
1994	38.9 C (102.0 F)
1995	38.9 C (102.0 F)
1996	37.8 C (100.0 F)
1997	20.0 C (68.0 F)

Coldest night (TNn)

The coldest night of the year at Nunn, 1948 to 1997. The record is -37.2 C (-35.0 F) in 1989, marked on the chart; the median year is -28.6 C (-19.5 F).

Coldest night (TNn) at Nunn by year
Year	Coldest night (TNn)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1980	-15.6 C (3.9 F)
1981	-30.6 C (-23.1 F)
1982	-31.7 C (-25.1 F)
1983	-29.4 C (-20.9 F)
1984	-33.3 C (-27.9 F)
1985	-30.6 C (-23.1 F)
1986	-26.1 C (-15.0 F)
1987	-24.4 C (-11.9 F)
1988	-26.1 C (-15.0 F)
1989	-37.2 C (-35.0 F)
1990	-36.1 C (-33.0 F)
1991	-24.4 C (-11.9 F)
1992	-23.9 C (-11.0 F)
1993	-27.2 C (-17.0 F)
1994	-25.6 C (-14.1 F)
1995	-27.8 C (-18.0 F)
1996	-33.3 C (-27.9 F)
1997	-30.6 C (-23.1 F)

Wettest day (Rx1day)

The wettest day of the year at Nunn, 1948 to 1997. The record is 83.8 mm (3.3 in) in 1987, marked on the chart; the median year is 36.4 mm (1.4 in).

Wettest day (Rx1day) at Nunn by year
Year	Wettest day (Rx1day)
1948	24.1 mm (0.9 in)
1949	33.0 mm (1.3 in)
1950	37.3 mm (1.5 in)
1951	22.1 mm (0.9 in)
1980	27.2 mm (1.1 in)
1981	39.1 mm (1.5 in)
1982	47.0 mm (1.9 in)
1983	38.4 mm (1.5 in)
1984	36.6 mm (1.4 in)
1985	42.4 mm (1.7 in)
1986	26.4 mm (1.0 in)
1987	83.8 mm (3.3 in)
1988	60.5 mm (2.4 in)
1989	45.7 mm (1.8 in)
1990	40.1 mm (1.6 in)
1991	36.1 mm (1.4 in)
1992	28.4 mm (1.1 in)
1993	25.9 mm (1.0 in)
1994	51.6 mm (2.0 in)
1995	22.9 mm (0.9 in)
1996	29.2 mm (1.1 in)
1997	4.8 mm (0.19 in)

Wettest five days (Rx5day)

The wettest five days of the year at Nunn, 1948 to 1997. The record is 88.9 mm (3.5 in) in 1982, marked on the chart; the median year is 52.4 mm (2.1 in).

Wettest five days (Rx5day) at Nunn by year
Year	Wettest five days (Rx5day)
1948	31.2 mm (1.2 in)
1949	53.8 mm (2.1 in)
1950	55.6 mm (2.2 in)
1951	46.2 mm (1.8 in)
1980	28.0 mm (1.1 in)
1981	52.1 mm (2.1 in)
1982	88.9 mm (3.5 in)
1983	47.8 mm (1.9 in)
1984	62.6 mm (2.5 in)
1985	42.4 mm (1.7 in)
1986	50.6 mm (2.0 in)
1987	86.1 mm (3.4 in)
1988	71.5 mm (2.8 in)
1989	57.4 mm (2.3 in)
1990	67.6 mm (2.7 in)
1991	65.8 mm (2.6 in)
1992	50.5 mm (2.0 in)
1993	43.5 mm (1.7 in)
1994	52.6 mm (2.1 in)
1995	46.2 mm (1.8 in)
1996	61.5 mm (2.4 in)
1997	12.7 mm (0.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Nunn, 1948 to 1997. The record is 72 days in 1991, marked on the chart; the median year is 40 days.

Longest dry spell (CDD) at Nunn by year
Year	Longest dry spell (CDD)
1948	39 days
1949	41 days
1950	31 days
1951	16 days
1980	36 days
1981	52 days
1982	52 days
1983	63 days
1984	53 days
1985	47 days
1986	36 days
1987	38 days
1988	26 days
1989	43 days
1990	25 days
1991	72 days
1992	55 days
1993	25 days
1994	25 days
1995	47 days
1996	45 days
1997	19 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.

Download the Data

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