Record envelope, standing records and threshold days for Arriba (USC00050348), Colorado, United States, with 52 years of record.
Key Facts for Arriba
Arriba (USC00050348) is a weather station in Colorado, United States at 39.28 latitude and -103.27 longitude, 1,598 m (5,241 ft) above sea level.
The station reports from 1907 to 1958, 52 years of record.
1,464 records set at Arriba still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Arriba set a daily record low minimum temperature of -2.8 C (27.0 F) on 1 October 1958.
About the Station
Location: Colorado, United States, 39.28 latitude, -103.27 longitude.
Elevation: 1,598 m (5,241 ft).
Period of record: 1907 to 1958, 52 years.
Eligible elements: tmax, tmin, prcp, snow.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Arriba. 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 Arriba, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-31.1 C (-24.0 F)
n/a
n/a
Feb
23.9 C (75.0 F)
-34.4 C (-29.9 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-27.2 C (-17.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-19.4 C (-2.9 F)
n/a
n/a
May
32.8 C (91.0 F)
-10.6 C (12.9 F)
n/a
n/a
Jun
40.6 C (105.1 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
2.2 C (36.0 F)
n/a
n/a
Aug
39.4 C (102.9 F)
1.7 C (35.1 F)
n/a
n/a
Sep
36.7 C (98.1 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
26.7 C (80.1 F)
-23.3 C (-9.9 F)
n/a
n/a
Dec
24.4 C (75.9 F)
-29.4 C (-20.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Arriba still stand. 1911 holds the most, with 61.
Standing records at Arriba by the year they were set
Year set
Standing records
1907
39
1908
34
1909
36
1910
27
1911
61
1912
38
1913
42
1914
27
1915
45
1916
31
1917
33
1928
34
1929
39
1930
37
1931
37
1932
46
1933
46
1934
52
1935
25
1936
59
1937
33
1938
32
1939
36
1940
30
1941
35
1942
32
1943
38
1944
12
1945
46
1946
39
1947
30
1948
45
1949
10
1950
46
1951
36
1952
29
1953
35
1954
43
1955
9
1956
26
1957
20
1958
14
All-Time Record Progression
1 new records
1 all-time records were set at Arriba between 2 June 1958 and 2 June 1958. Each dot is a new record.
When Arriba set new all-time records
Date
Kind
Detail
1958-06-02
Record daily precipitation
Record daily precipitation 101.6 mm (4.0 in)
Wettest Day of Each Month
Jun: 101.6 mm (4.0 in)
The wettest day on record for each calendar month at Arriba. The most was 101.6 mm (4.0 in) on 2 June 1958.
Record daily precipitation for each month at Arriba
Month
Record daily precipitation (mm)
Date
Jan
16.5 mm (0.6 in)
26 January 1948
Feb
18.5 mm (0.7 in)
28 February 1912
Mar
42.2 mm (1.7 in)
15 March 1946
Apr
46.2 mm (1.8 in)
8 April 1913
May
82.8 mm (3.3 in)
27 May 1947
Jun
101.6 mm (4.0 in)
2 June 1958
Jul
72.4 mm (2.9 in)
26 July 1907
Aug
58.9 mm (2.3 in)
20 August 1916
Sep
86.4 mm (3.4 in)
2 September 1911
Oct
77.5 mm (3.1 in)
19 October 1908
Nov
52.1 mm (2.1 in)
6 November 1946
Dec
19.6 mm (0.8 in)
4 December 1913
Period of Record Coverage
1907 to 1958
Complete yearUnder 90 percent of days
42 years of record at Arriba, 1907 to 1958. 17 years have data for under 90 percent of days and are left out of rankings: 1910, 1916, 1917, 1928, 1931, 1932, 1934, 1946 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 22 complete years at Arriba, 1907 to 1957. Blue stripes are years cooler than the station's own mean of 9.1 C (48.5 F); red stripes are warmer. The coolest year was 1912, at 7.4 C (45.4 F), and the warmest was 1933, at 10.5 C (51.0 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Arriba as warming stripes, 1907 to 1957
Year
Annual mean temperature
Difference from the station mean
1907
9.2 C
+0.04 C
1908
8.5 C
-0.65 C
1911
9.2 C
+0.08 C
1912
7.4 C
-1.71 C
1913
8.0 C
-1.18 C
1914
9.4 C
+0.26 C
1915
8.8 C
-0.33 C
1929
8.8 C
-0.36 C
1930
9.1 C
-0.01 C
1933
10.5 C
+1.38 C
1935
9.5 C
+0.30 C
1936
9.4 C
+0.25 C
1937
9.0 C
-0.12 C
1938
10.1 C
+0.93 C
1939
9.6 C
+0.46 C
1940
9.2 C
+0.06 C
1941
9.1 C
-0.06 C
1942
8.6 C
-0.59 C
1943
9.8 C
+0.63 C
1944
8.8 C
-0.31 C
1953
10.0 C
+0.85 C
1957
9.1 C
-0.03 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
1907 to 1958
Yearly extremes at Arriba: 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)
1929
37.0 C (98.5 F)
42
Coldest night (TNn)
-34.4 C (-29.9 F)
1936
-24.7 C (-12.5 F)
42
Wettest day (Rx1day)
101.6 mm (4.0 in)
1958
42.6 mm (1.7 in)
42
Wettest five days (Rx5day)
130.3 mm (5.1 in)
1958
58.6 mm (2.3 in)
42
Longest dry spell (CDD)
87 days
1910
40 days
42
Hottest day (TXx)
The hottest day of the year at Arriba, 1907 to 1958. The record is 40.6 C (105.1 F) in 1929, marked on the chart; the median year is 37.0 C (98.5 F).
Hottest day (TXx) at Arriba by year
Year
Hottest day (TXx)
1907
35.0 C (95.0 F)
1908
34.4 C (93.9 F)
1909
33.3 C (91.9 F)
1910
35.6 C (96.1 F)
1911
35.6 C (96.1 F)
1912
33.3 C (91.9 F)
1913
37.8 C (100.0 F)
1914
36.1 C (97.0 F)
1915
33.9 C (93.0 F)
1916
31.7 C (89.1 F)
1917
37.2 C (99.0 F)
1928
35.6 C (96.1 F)
1929
40.6 C (105.1 F)
1930
37.2 C (99.0 F)
1931
40.0 C (104.0 F)
1932
38.3 C (100.9 F)
1933
36.7 C (98.1 F)
1934
39.4 C (102.9 F)
1935
36.1 C (97.0 F)
1936
40.0 C (104.0 F)
1937
37.8 C (100.0 F)
1938
39.4 C (102.9 F)
1939
37.8 C (100.0 F)
1940
38.9 C (102.0 F)
1941
34.4 C (93.9 F)
1942
36.7 C (98.1 F)
1943
37.2 C (99.0 F)
1944
36.1 C (97.0 F)
1945
37.2 C (99.0 F)
1946
37.8 C (100.0 F)
1947
37.2 C (99.0 F)
1948
37.2 C (99.0 F)
1949
37.2 C (99.0 F)
1950
36.7 C (98.1 F)
1951
35.6 C (96.1 F)
1952
37.8 C (100.0 F)
1953
37.8 C (100.0 F)
1954
39.4 C (102.9 F)
1955
35.6 C (96.1 F)
1956
36.1 C (97.0 F)
1957
35.6 C (96.1 F)
1958
36.1 C (97.0 F)
Coldest night (TNn)
The coldest night of the year at Arriba, 1907 to 1958. The record is -34.4 C (-29.9 F) in 1936, marked on the chart; the median year is -24.7 C (-12.5 F).
Coldest night (TNn) at Arriba by year
Year
Coldest night (TNn)
1907
-21.7 C (-7.1 F)
1908
-26.7 C (-16.1 F)
1909
-26.7 C (-16.1 F)
1910
-25.0 C (-13.0 F)
1911
-30.6 C (-23.1 F)
1912
-27.2 C (-17.0 F)
1913
-27.8 C (-18.0 F)
1914
-24.4 C (-11.9 F)
1915
-21.7 C (-7.1 F)
1916
-26.1 C (-15.0 F)
1917
-25.0 C (-13.0 F)
1928
-16.7 C (1.9 F)
1929
-29.4 C (-20.9 F)
1930
-31.1 C (-24.0 F)
1931
-20.6 C (-5.1 F)
1932
-29.4 C (-20.9 F)
1933
-31.7 C (-25.1 F)
1934
-18.3 C (-0.9 F)
1935
-27.2 C (-17.0 F)
1936
-34.4 C (-29.9 F)
1937
-27.8 C (-18.0 F)
1938
-21.7 C (-7.1 F)
1939
-20.6 C (-5.1 F)
1940
-25.6 C (-14.1 F)
1941
-21.7 C (-7.1 F)
1942
-30.6 C (-23.1 F)
1943
-29.4 C (-20.9 F)
1944
-20.6 C (-5.1 F)
1945
-21.1 C (-6.0 F)
1946
-20.0 C (-4.0 F)
1947
-21.1 C (-6.0 F)
1948
-28.9 C (-20.0 F)
1949
-24.4 C (-11.9 F)
1950
-24.4 C (-11.9 F)
1951
-28.9 C (-20.0 F)
1952
-23.3 C (-9.9 F)
1953
-20.6 C (-5.1 F)
1954
-20.0 C (-4.0 F)
1955
-20.6 C (-5.1 F)
1956
-16.1 C (3.0 F)
1957
-25.0 C (-13.0 F)
1958
-20.0 C (-4.0 F)
Wettest day (Rx1day)
The wettest day of the year at Arriba, 1907 to 1958. The record is 101.6 mm (4.0 in) in 1958, marked on the chart; the median year is 42.6 mm (1.7 in).
Wettest day (Rx1day) at Arriba by year
Year
Wettest day (Rx1day)
1907
72.4 mm (2.9 in)
1908
77.5 mm (3.1 in)
1909
45.7 mm (1.8 in)
1910
30.2 mm (1.2 in)
1911
86.4 mm (3.4 in)
1912
47.0 mm (1.9 in)
1913
46.2 mm (1.8 in)
1914
44.5 mm (1.8 in)
1915
40.6 mm (1.6 in)
1916
58.9 mm (2.3 in)
1917
62.5 mm (2.5 in)
1928
34.3 mm (1.4 in)
1929
30.0 mm (1.2 in)
1930
50.8 mm (2.0 in)
1931
45.2 mm (1.8 in)
1932
38.1 mm (1.5 in)
1933
35.1 mm (1.4 in)
1934
17.5 mm (0.7 in)
1935
39.6 mm (1.6 in)
1936
26.7 mm (1.1 in)
1937
34.0 mm (1.3 in)
1938
29.0 mm (1.1 in)
1939
39.4 mm (1.6 in)
1940
40.6 mm (1.6 in)
1941
64.5 mm (2.5 in)
1942
64.3 mm (2.5 in)
1943
22.4 mm (0.9 in)
1944
50.8 mm (2.0 in)
1945
38.4 mm (1.5 in)
1946
69.6 mm (2.7 in)
1947
82.8 mm (3.3 in)
1948
47.0 mm (1.9 in)
1949
31.0 mm (1.2 in)
1950
32.0 mm (1.3 in)
1951
50.8 mm (2.0 in)
1952
48.3 mm (1.9 in)
1953
30.0 mm (1.2 in)
1954
36.8 mm (1.4 in)
1955
52.1 mm (2.1 in)
1956
27.7 mm (1.1 in)
1957
27.9 mm (1.1 in)
1958
101.6 mm (4.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Arriba, 1907 to 1958. The record is 130.3 mm (5.1 in) in 1958, marked on the chart; the median year is 58.6 mm (2.3 in).
Wettest five days (Rx5day) at Arriba by year
Year
Wettest five days (Rx5day)
1907
93.3 mm (3.7 in)
1908
95.3 mm (3.8 in)
1909
66.8 mm (2.6 in)
1910
48.6 mm (1.9 in)
1911
96.1 mm (3.8 in)
1912
67.0 mm (2.6 in)
1913
58.4 mm (2.3 in)
1914
78.8 mm (3.1 in)
1915
80.3 mm (3.2 in)
1916
60.4 mm (2.4 in)
1917
77.5 mm (3.1 in)
1928
53.6 mm (2.1 in)
1929
38.1 mm (1.5 in)
1930
52.6 mm (2.1 in)
1931
52.8 mm (2.1 in)
1932
52.8 mm (2.1 in)
1933
62.8 mm (2.5 in)
1934
20.3 mm (0.8 in)
1935
64.3 mm (2.5 in)
1936
44.8 mm (1.8 in)
1937
35.8 mm (1.4 in)
1938
93.2 mm (3.7 in)
1939
39.7 mm (1.6 in)
1940
57.2 mm (2.3 in)
1941
93.9 mm (3.7 in)
1942
122.0 mm (4.8 in)
1943
55.7 mm (2.2 in)
1944
50.8 mm (2.0 in)
1945
88.9 mm (3.5 in)
1946
116.6 mm (4.6 in)
1947
119.4 mm (4.7 in)
1948
64.3 mm (2.5 in)
1949
52.1 mm (2.1 in)
1950
58.7 mm (2.3 in)
1951
52.3 mm (2.1 in)
1952
83.6 mm (3.3 in)
1953
30.0 mm (1.2 in)
1954
39.4 mm (1.6 in)
1955
58.4 mm (2.3 in)
1956
42.1 mm (1.7 in)
1957
46.4 mm (1.8 in)
1958
130.3 mm (5.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Arriba, 1907 to 1958. The record is 87 days in 1910, marked on the chart; the median year is 40 days.
Longest dry spell (CDD) at Arriba by year
Year
Longest dry spell (CDD)
1907
67 days
1908
75 days
1909
34 days
1910
87 days
1911
33 days
1912
54 days
1913
30 days
1914
43 days
1915
26 days
1916
35 days
1917
46 days
1928
60 days
1929
37 days
1930
75 days
1931
80 days
1932
44 days
1933
43 days
1934
42 days
1935
39 days
1936
44 days
1937
48 days
1938
25 days
1939
50 days
1940
31 days
1941
18 days
1942
24 days
1943
34 days
1944
23 days
1945
41 days
1946
24 days
1947
26 days
1948
31 days
1949
52 days
1950
38 days
1951
19 days
1952
56 days
1953
34 days
1954
73 days
1955
34 days
1956
43 days
1957
46 days
1958
39 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
22 years with a frost
Across 22 years with a frost, the median last spring frost at Arriba falls on 15 May and the median first autumn frost on 26 September, which leaves a median of 130 days between them.
Frost dates and growing season at Arriba
Measure
Median, all years
Earliest period
Recent period (1907 to 1957)
Recent against earliest
Fitted trend
Last spring frost
15 May
n/a
15 May
n/a
n/a
First autumn frost
26 September
n/a
26 September
n/a
n/a
Growing days
130 days
n/a
130 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.
Rainfall Return Levels
32 years, 1907 to 1957
A day with at least 41.6 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 108.9 mm (4.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Arriba: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
41.6 mm (1.6 in)
5 years
56.4 mm (2.2 in)
10 years
67.3 mm (2.6 in)
25 years
82.7 mm (3.3 in)
50 years
95.3 mm (3.8 in)
Longer than the 32 years of record
100 years
108.9 mm (4.3 in)
Longer than the 32 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, 32 years of values from 1907 to 1957.
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: 86.4 mm (3.4 in) in 1911; 82.8 mm (3.3 in) in 1947; 77.5 mm (3.1 in) in 1908.
Download the Data
Data for Arriba standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Arriba 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.