Record envelope, standing records and threshold days for Morenci (USC00205601), Michigan, United States, with 34 years of record.
Key Facts for Morenci
Morenci (USC00205601) is a weather station in Michigan, United States at 41.75 latitude and -84.22 longitude, 247 m (811 ft) above sea level.
The station reports from 1907 to 1940, 34 years of record.
1,464 records set at Morenci still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Morenci set a daily record high minimum temperature of 22.2 C (72.0 F) on 31 August 1940.
About the Station
Location: Michigan, United States, 41.75 latitude, -84.22 longitude.
Elevation: 247 m (811 ft).
Period of record: 1907 to 1940, 34 years.
Eligible elements: tmax, tmin, prcp.
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 Morenci. 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 Morenci, 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)
-28.9 C (-20.0 F)
n/a
n/a
Feb
20.0 C (68.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-21.1 C (-6.0 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-13.3 C (8.1 F)
n/a
n/a
May
37.2 C (99.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
39.4 C (102.9 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
42.8 C (109.0 F)
5.0 C (41.0 F)
n/a
n/a
Aug
42.8 C (109.0 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-8.3 C (17.1 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-18.9 C (-2.0 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Morenci still stand. 1930 holds the most, with 62.
Standing records at Morenci by the year they were set
Year set
Standing records
1907
32
1908
36
1909
41
1910
46
1911
54
1912
59
1913
52
1914
46
1915
47
1916
58
1917
49
1918
56
1919
28
1920
44
1921
38
1922
32
1923
29
1924
41
1925
57
1926
32
1927
35
1928
32
1929
41
1930
62
1931
53
1932
48
1933
53
1934
45
1935
36
1936
57
1937
29
1938
29
1939
38
1940
29
All-Time Record Progression
1 new records
1 all-time records were set at Morenci between 19 January 1940 and 19 January 1940. Each dot is a new record.
When Morenci set new all-time records
Date
Kind
Detail
1940-01-19
Record low maximum temperature
Record low maximum temperature -17.2 C (1.0 F)
Wettest Day of Each Month
Aug: 108.0 mm (4.3 in)
The wettest day on record for each calendar month at Morenci. The most was 108.0 mm (4.3 in) on 16 August 1920.
Record daily precipitation for each month at Morenci
Month
Record daily precipitation (mm)
Date
Jan
35.6 mm (1.4 in)
4 January 1922
Feb
48.3 mm (1.9 in)
19 February 1939
Mar
40.6 mm (1.6 in)
30 March 1922
Apr
66.3 mm (2.6 in)
29 April 1909
May
74.7 mm (2.9 in)
12 May 1914
Jun
50.8 mm (2.0 in)
17 June 1920
Jul
78.5 mm (3.1 in)
12 July 1925
Aug
108.0 mm (4.3 in)
16 August 1920
Sep
73.7 mm (2.9 in)
3 September 1932
Oct
47.5 mm (1.9 in)
29 October 1917
Nov
58.4 mm (2.3 in)
22 November 1909
Dec
44.5 mm (1.8 in)
13 December 1923
Period of Record Coverage
1907 to 1940
Complete yearUnder 90 percent of days
34 years of record at Morenci, 1907 to 1940. 4 years have data for under 90 percent of days and are left out of rankings: 1907, 1922, 1923, 1940.
Cooler than the station meanWarmer than the station mean
One stripe for each of 25 complete years at Morenci, 1908 to 1939. Blue stripes are years cooler than the station's own mean of 9.7 C (49.4 F); red stripes are warmer. The coolest year was 1917, at 7.5 C (45.5 F), and the warmest was 1931, at 12.1 C (53.7 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Morenci as warming stripes, 1908 to 1939
Year
Annual mean temperature
Difference from the station mean
1908
9.8 C
+0.14 C
1909
9.1 C
-0.61 C
1910
9.3 C
-0.40 C
1912
8.4 C
-1.31 C
1913
10.3 C
+0.57 C
1915
9.0 C
-0.66 C
1916
9.3 C
-0.37 C
1917
7.5 C
-2.19 C
1918
9.4 C
-0.27 C
1920
8.7 C
-1.03 C
1921
11.2 C
+1.49 C
1924
8.5 C
-1.24 C
1925
9.5 C
-0.24 C
1926
8.7 C
-0.96 C
1927
10.2 C
+0.50 C
1929
8.7 C
-1.01 C
1931
12.1 C
+2.38 C
1932
10.6 C
+0.95 C
1933
11.1 C
+1.42 C
1934
10.5 C
+0.84 C
1935
9.9 C
+0.19 C
1936
9.8 C
+0.08 C
1937
9.4 C
-0.30 C
1938
10.7 C
+1.03 C
1939
10.6 C
+0.94 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 1940
Yearly extremes at Morenci: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.8 C (109.0 F)
1918
37.8 C (100.0 F)
34
Coldest night (TNn)
-33.3 C (-27.9 F)
1929
-22.7 C (-9.0 F)
34
Wettest day (Rx1day)
108.0 mm (4.3 in)
1920
48.7 mm (1.9 in)
34
Wettest five days (Rx5day)
137.2 mm (5.4 in)
1920
75.7 mm (3.0 in)
34
Longest dry spell (CDD)
34 days
1918
19 days
34
Hottest day (TXx)
The hottest day of the year at Morenci, 1907 to 1940. The record is 42.8 C (109.0 F) in 1918, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Morenci by year
Year
Hottest day (TXx)
1907
31.1 C (88.0 F)
1908
35.0 C (95.0 F)
1909
32.8 C (91.0 F)
1910
35.0 C (95.0 F)
1911
37.2 C (99.0 F)
1912
34.4 C (93.9 F)
1913
38.9 C (102.0 F)
1914
37.8 C (100.0 F)
1915
33.3 C (91.9 F)
1916
41.1 C (106.0 F)
1917
36.7 C (98.1 F)
1918
42.8 C (109.0 F)
1919
37.8 C (100.0 F)
1920
35.6 C (96.1 F)
1921
37.8 C (100.0 F)
1922
38.9 C (102.0 F)
1923
38.9 C (102.0 F)
1924
36.1 C (97.0 F)
1925
37.8 C (100.0 F)
1926
38.3 C (100.9 F)
1927
36.7 C (98.1 F)
1928
35.6 C (96.1 F)
1929
35.6 C (96.1 F)
1930
40.0 C (104.0 F)
1931
38.9 C (102.0 F)
1932
37.2 C (99.0 F)
1933
38.9 C (102.0 F)
1934
41.7 C (107.1 F)
1935
37.8 C (100.0 F)
1936
42.8 C (109.0 F)
1937
35.6 C (96.1 F)
1938
35.0 C (95.0 F)
1939
38.9 C (102.0 F)
1940
39.4 C (102.9 F)
Coldest night (TNn)
The coldest night of the year at Morenci, 1907 to 1940. The record is -33.3 C (-27.9 F) in 1929, marked on the chart; the median year is -22.7 C (-9.0 F).
Coldest night (TNn) at Morenci by year
Year
Coldest night (TNn)
1907
-12.8 C (9.0 F)
1908
-25.6 C (-14.1 F)
1909
-25.0 C (-13.0 F)
1910
-19.4 C (-2.9 F)
1911
-17.2 C (1.0 F)
1912
-29.4 C (-20.9 F)
1913
-21.1 C (-6.0 F)
1914
-27.8 C (-18.0 F)
1915
-26.1 C (-15.0 F)
1916
-22.2 C (-8.0 F)
1917
-30.0 C (-22.0 F)
1918
-29.4 C (-20.9 F)
1919
-18.9 C (-2.0 F)
1920
-24.4 C (-11.9 F)
1921
-14.4 C (6.1 F)
1922
-28.9 C (-20.0 F)
1923
-17.8 C (0.0 F)
1924
-25.6 C (-14.1 F)
1925
-23.3 C (-9.9 F)
1926
-21.7 C (-7.1 F)
1927
-23.9 C (-11.0 F)
1928
-19.4 C (-2.9 F)
1929
-33.3 C (-27.9 F)
1930
-18.3 C (-0.9 F)
1931
-15.0 C (5.0 F)
1932
-20.0 C (-4.0 F)
1933
-25.6 C (-14.1 F)
1934
-25.6 C (-14.1 F)
1935
-18.9 C (-2.0 F)
1936
-23.9 C (-11.0 F)
1937
-22.2 C (-8.0 F)
1938
-20.0 C (-4.0 F)
1939
-18.3 C (-0.9 F)
1940
-25.0 C (-13.0 F)
Wettest day (Rx1day)
The wettest day of the year at Morenci, 1907 to 1940. The record is 108.0 mm (4.3 in) in 1920, marked on the chart; the median year is 48.7 mm (1.9 in).
Wettest day (Rx1day) at Morenci by year
Year
Wettest day (Rx1day)
1907
46.7 mm (1.8 in)
1908
58.9 mm (2.3 in)
1909
66.3 mm (2.6 in)
1910
38.9 mm (1.5 in)
1911
85.3 mm (3.4 in)
1912
40.6 mm (1.6 in)
1913
41.4 mm (1.6 in)
1914
74.7 mm (2.9 in)
1915
77.0 mm (3.0 in)
1916
36.6 mm (1.4 in)
1917
49.0 mm (1.9 in)
1918
38.1 mm (1.5 in)
1919
45.2 mm (1.8 in)
1920
108.0 mm (4.3 in)
1921
43.2 mm (1.7 in)
1922
68.6 mm (2.7 in)
1923
51.6 mm (2.0 in)
1924
43.2 mm (1.7 in)
1925
78.5 mm (3.1 in)
1926
38.4 mm (1.5 in)
1927
50.8 mm (2.0 in)
1928
41.9 mm (1.6 in)
1929
50.8 mm (2.0 in)
1930
41.9 mm (1.6 in)
1931
43.2 mm (1.7 in)
1932
73.7 mm (2.9 in)
1933
33.5 mm (1.3 in)
1934
50.8 mm (2.0 in)
1935
34.8 mm (1.4 in)
1936
40.4 mm (1.6 in)
1937
52.8 mm (2.1 in)
1938
50.0 mm (2.0 in)
1939
48.3 mm (1.9 in)
1940
57.7 mm (2.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Morenci, 1907 to 1940. The record is 137.2 mm (5.4 in) in 1920, marked on the chart; the median year is 75.7 mm (3.0 in).
Wettest five days (Rx5day) at Morenci by year
Year
Wettest five days (Rx5day)
1907
72.9 mm (2.9 in)
1908
89.7 mm (3.5 in)
1909
69.4 mm (2.7 in)
1910
55.4 mm (2.2 in)
1911
95.2 mm (3.7 in)
1912
73.1 mm (2.9 in)
1913
125.0 mm (4.9 in)
1914
131.1 mm (5.2 in)
1915
85.9 mm (3.4 in)
1916
58.2 mm (2.3 in)
1917
81.0 mm (3.2 in)
1918
61.0 mm (2.4 in)
1919
89.7 mm (3.5 in)
1920
137.2 mm (5.4 in)
1921
73.7 mm (2.9 in)
1922
78.7 mm (3.1 in)
1923
67.6 mm (2.7 in)
1924
58.6 mm (2.3 in)
1925
89.2 mm (3.5 in)
1926
74.4 mm (2.9 in)
1927
121.7 mm (4.8 in)
1928
52.4 mm (2.1 in)
1929
82.6 mm (3.3 in)
1930
55.5 mm (2.2 in)
1931
64.8 mm (2.6 in)
1932
120.2 mm (4.7 in)
1933
54.6 mm (2.1 in)
1934
57.7 mm (2.3 in)
1935
53.1 mm (2.1 in)
1936
86.0 mm (3.4 in)
1937
91.0 mm (3.6 in)
1938
68.9 mm (2.7 in)
1939
77.0 mm (3.0 in)
1940
93.4 mm (3.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Morenci, 1907 to 1940. The record is 34 days in 1918, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Morenci by year
Year
Longest dry spell (CDD)
1907
21 days
1908
32 days
1909
24 days
1910
21 days
1911
17 days
1912
12 days
1913
17 days
1914
26 days
1915
23 days
1916
25 days
1917
14 days
1918
34 days
1919
25 days
1920
24 days
1921
18 days
1922
16 days
1923
20 days
1924
23 days
1925
23 days
1926
10 days
1927
15 days
1928
13 days
1929
14 days
1930
27 days
1931
18 days
1932
23 days
1933
18 days
1934
19 days
1935
15 days
1936
20 days
1937
15 days
1938
16 days
1939
16 days
1940
11 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
25 years with a frost
Across 25 years with a frost, the median last spring frost at Morenci falls on 11 May and the median first autumn frost on 5 October, which leaves a median of 150 days between them.
Fitted over all years, the growing season changes by +2.8 days per decade at this station.
Frost dates and growing season at Morenci
Measure
Median, all years
Earliest period
Recent period (1908 to 1939)
Recent against earliest
Fitted trend
Last spring frost
11 May
n/a
11 May
n/a
-2.6 days per decade
First autumn frost
5 October
n/a
5 October
n/a
+0.2 days per decade
Growing days
150 days
n/a
150 days
n/a
+2.8 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.
Download the Data
Data for Morenci standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Morenci 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.