Record envelope, standing records and threshold days for San Miguel Island (USC00047866), California, United States, with 49 years of record.
Key Facts for San Miguel Island
San Miguel Island (USC00047866) is a weather station in California, United States at 34.05 latitude and -120.38 longitude, 165 m (540 ft) above sea level.
The station reports from 1894 to 1942, 49 years of record.
1,464 records set at San Miguel Island still stand.
Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
San Miguel Island set a monthly record high minimum temperature of 18.9 C (66.0 F) on 20 May 1942.
About the Station
Location: California, United States, 34.05 latitude, -120.38 longitude.
Elevation: 165 m (540 ft).
Period of record: 1894 to 1942, 49 years.
Eligible elements: tmax, tmin.
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 San Miguel Island. 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 San Miguel Island, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
30.0 C (86.0 F)
-0.6 C (30.9 F)
n/a
n/a
Feb
28.9 C (84.0 F)
-0.6 C (30.9 F)
n/a
n/a
Mar
30.6 C (87.1 F)
2.8 C (37.0 F)
n/a
n/a
Apr
30.0 C (86.0 F)
1.1 C (34.0 F)
n/a
n/a
May
28.9 C (84.0 F)
3.3 C (37.9 F)
n/a
n/a
Jun
31.7 C (89.1 F)
4.4 C (39.9 F)
n/a
n/a
Jul
27.2 C (81.0 F)
6.1 C (43.0 F)
n/a
n/a
Aug
30.0 C (86.0 F)
5.6 C (42.1 F)
n/a
n/a
Sep
33.3 C (91.9 F)
4.4 C (39.9 F)
n/a
n/a
Oct
35.0 C (95.0 F)
7.8 C (46.0 F)
n/a
n/a
Nov
35.6 C (96.1 F)
3.3 C (37.9 F)
n/a
n/a
Dec
32.2 C (90.0 F)
2.8 C (37.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at San Miguel Island still stand. 1899 holds the most, with 87.
Standing records at San Miguel Island by the year they were set
Year set
Standing records
1894
51
1895
66
1896
71
1897
58
1898
73
1899
87
1900
82
1901
61
1902
64
1903
26
1904
47
1905
34
1906
44
1907
20
1908
33
1909
58
1910
59
1911
51
1912
22
1913
48
1914
45
1915
43
1916
50
1917
68
1918
40
1919
52
1920
27
1921
45
1940
22
1941
13
1942
4
Wettest Day of Each Month
Jan: 89.4 mm (3.5 in)
The wettest day on record for each calendar month at San Miguel Island. The most was 89.4 mm (3.5 in) on 9 January 1907.
Record daily precipitation for each month at San Miguel Island
Month
Record daily precipitation (mm)
Date
Jan
89.4 mm (3.5 in)
9 January 1907
Feb
69.6 mm (2.7 in)
20 February 1918
Mar
85.3 mm (3.4 in)
1 March 1911
Apr
35.8 mm (1.4 in)
6 April 1911
May
31.8 mm (1.3 in)
25 May 1906
Jun
17.8 mm (0.7 in)
17 June 1909
Jul
4.1 mm (0.16 in)
22 July 1896
Aug
19.1 mm (0.8 in)
22 August 1904
Sep
57.9 mm (2.3 in)
26 September 1898
Oct
58.4 mm (2.3 in)
26 October 1901
Nov
68.6 mm (2.7 in)
10 November 1902
Dec
79.5 mm (3.1 in)
23 December 1940
Period of Record Coverage
1894 to 1942
Complete yearUnder 90 percent of days
31 years of record at San Miguel Island, 1894 to 1942. 4 years have data for under 90 percent of days and are left out of rankings: 1894, 1902, 1940, 1942.
Cooler than the station meanWarmer than the station mean
One stripe for each of 21 complete years at San Miguel Island, 1895 to 1941. Blue stripes are years cooler than the station's own mean of 13.9 C (57.1 F); red stripes are warmer. The coolest year was 1916, at 12.9 C (55.2 F), and the warmest was 1918, at 14.8 C (58.6 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at San Miguel Island as warming stripes, 1895 to 1941
Year
Annual mean temperature
Difference from the station mean
1895
14.5 C
+0.59 C
1896
14.4 C
+0.50 C
1898
13.6 C
-0.31 C
1900
14.5 C
+0.56 C
1903
13.8 C
-0.15 C
1904
14.7 C
+0.81 C
1906
14.0 C
+0.07 C
1907
13.6 C
-0.37 C
1909
13.2 C
-0.76 C
1910
13.3 C
-0.68 C
1912
13.3 C
-0.65 C
1913
13.5 C
-0.43 C
1914
14.2 C
+0.23 C
1915
13.7 C
-0.22 C
1916
12.9 C
-1.03 C
1917
14.4 C
+0.44 C
1918
14.8 C
+0.85 C
1919
14.0 C
+0.03 C
1920
13.7 C
-0.21 C
1921
14.0 C
+0.11 C
1941
14.5 C
+0.52 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
1894 to 1942
Yearly extremes at San Miguel Island: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.6 C (96.1 F)
1921
30.6 C (87.1 F)
31
Coldest night (TNn)
-0.6 C (30.9 F)
1903
3.3 C (37.9 F)
31
Wettest day (Rx1day)
89.4 mm (3.5 in)
1907
49.6 mm (2.0 in)
32
Wettest five days (Rx5day)
149.5 mm (5.9 in)
1940
81.3 mm (3.2 in)
32
Longest dry spell (CDD)
169 days
1895
51 days
32
Hottest day (TXx)
The hottest day of the year at San Miguel Island, 1894 to 1942. The record is 35.6 C (96.1 F) in 1921, marked on the chart; the median year is 30.6 C (87.1 F).
Hottest day (TXx) at San Miguel Island by year
Year
Hottest day (TXx)
1894
32.2 C (90.0 F)
1895
32.2 C (90.0 F)
1896
28.9 C (84.0 F)
1897
27.2 C (81.0 F)
1898
31.1 C (88.0 F)
1899
31.1 C (88.0 F)
1900
31.1 C (88.0 F)
1901
33.3 C (91.9 F)
1902
25.0 C (77.0 F)
1903
29.4 C (84.9 F)
1904
28.9 C (84.0 F)
1905
26.7 C (80.1 F)
1906
30.6 C (87.1 F)
1907
28.3 C (82.9 F)
1908
27.8 C (82.0 F)
1909
33.3 C (91.9 F)
1910
31.1 C (88.0 F)
1911
28.9 C (84.0 F)
1912
31.7 C (89.1 F)
1913
33.9 C (93.0 F)
1914
32.8 C (91.0 F)
1915
29.4 C (84.9 F)
1916
30.0 C (86.0 F)
1917
33.3 C (91.9 F)
1918
33.3 C (91.9 F)
1919
30.0 C (86.0 F)
1920
28.9 C (84.0 F)
1921
35.6 C (96.1 F)
1938
n/a
1940
34.4 C (93.9 F)
1941
30.6 C (87.1 F)
1942
23.9 C (75.0 F)
Coldest night (TNn)
The coldest night of the year at San Miguel Island, 1894 to 1942. The record is -0.6 C (30.9 F) in 1903, marked on the chart; the median year is 3.3 C (37.9 F).
Coldest night (TNn) at San Miguel Island by year
Year
Coldest night (TNn)
1894
2.8 C (37.0 F)
1895
2.8 C (37.0 F)
1896
2.8 C (37.0 F)
1897
1.1 C (34.0 F)
1898
2.2 C (36.0 F)
1899
2.8 C (37.0 F)
1900
3.3 C (37.9 F)
1901
2.2 C (36.0 F)
1902
3.3 C (37.9 F)
1903
-0.6 C (30.9 F)
1904
5.0 C (41.0 F)
1905
4.4 C (39.9 F)
1906
5.0 C (41.0 F)
1907
3.3 C (37.9 F)
1908
4.4 C (39.9 F)
1909
4.4 C (39.9 F)
1910
2.8 C (37.0 F)
1911
4.4 C (39.9 F)
1912
4.4 C (39.9 F)
1913
-0.6 C (30.9 F)
1914
6.1 C (43.0 F)
1915
2.8 C (37.0 F)
1916
3.9 C (39.0 F)
1917
2.2 C (36.0 F)
1918
3.9 C (39.0 F)
1919
5.0 C (41.0 F)
1920
6.1 C (43.0 F)
1921
4.4 C (39.9 F)
1938
n/a
1940
1.1 C (34.0 F)
1941
5.0 C (41.0 F)
1942
5.0 C (41.0 F)
Wettest day (Rx1day)
The wettest day of the year at San Miguel Island, 1894 to 1942. The record is 89.4 mm (3.5 in) in 1907, marked on the chart; the median year is 49.6 mm (2.0 in).
Wettest day (Rx1day) at San Miguel Island by year
Year
Wettest day (Rx1day)
1894
36.8 mm (1.4 in)
1895
31.2 mm (1.2 in)
1896
48.3 mm (1.9 in)
1897
54.9 mm (2.2 in)
1898
57.9 mm (2.3 in)
1899
69.9 mm (2.8 in)
1900
25.9 mm (1.0 in)
1901
58.4 mm (2.3 in)
1902
68.6 mm (2.7 in)
1903
61.0 mm (2.4 in)
1904
43.2 mm (1.7 in)
1905
30.5 mm (1.2 in)
1906
60.2 mm (2.4 in)
1907
89.4 mm (3.5 in)
1908
50.8 mm (2.0 in)
1909
39.4 mm (1.6 in)
1910
38.1 mm (1.5 in)
1911
85.3 mm (3.4 in)
1912
38.9 mm (1.5 in)
1913
57.9 mm (2.3 in)
1914
63.5 mm (2.5 in)
1915
40.6 mm (1.6 in)
1916
88.9 mm (3.5 in)
1917
22.9 mm (0.9 in)
1918
83.8 mm (3.3 in)
1919
19.1 mm (0.8 in)
1920
19.1 mm (0.8 in)
1921
27.4 mm (1.1 in)
1938
47.0 mm (1.9 in)
1940
79.5 mm (3.1 in)
1941
58.7 mm (2.3 in)
1942
28.7 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at San Miguel Island, 1894 to 1942. The record is 149.5 mm (5.9 in) in 1940, marked on the chart; the median year is 81.3 mm (3.2 in).
Wettest five days (Rx5day) at San Miguel Island by year
Year
Wettest five days (Rx5day)
1894
59.8 mm (2.4 in)
1895
58.3 mm (2.3 in)
1896
60.8 mm (2.4 in)
1897
90.7 mm (3.6 in)
1898
68.6 mm (2.7 in)
1899
92.2 mm (3.6 in)
1900
46.2 mm (1.8 in)
1901
63.0 mm (2.5 in)
1902
105.9 mm (4.2 in)
1903
81.3 mm (3.2 in)
1904
81.3 mm (3.2 in)
1905
88.5 mm (3.5 in)
1906
90.0 mm (3.5 in)
1907
139.7 mm (5.5 in)
1908
67.8 mm (2.7 in)
1909
53.9 mm (2.1 in)
1910
39.6 mm (1.6 in)
1911
127.0 mm (5.0 in)
1912
104.4 mm (4.1 in)
1913
88.4 mm (3.5 in)
1914
100.8 mm (4.0 in)
1915
75.2 mm (3.0 in)
1916
117.3 mm (4.6 in)
1917
39.1 mm (1.5 in)
1918
136.4 mm (5.4 in)
1919
31.9 mm (1.3 in)
1920
33.6 mm (1.3 in)
1921
41.4 mm (1.6 in)
1938
126.0 mm (5.0 in)
1940
149.5 mm (5.9 in)
1941
148.6 mm (5.9 in)
1942
47.2 mm (1.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at San Miguel Island, 1894 to 1942. The record is 169 days in 1895, marked on the chart; the median year is 51 days.
Longest dry spell (CDD) at San Miguel Island by year
Year
Longest dry spell (CDD)
1894
118 days
1895
169 days
1896
53 days
1897
60 days
1898
43 days
1899
71 days
1900
46 days
1901
106 days
1902
110 days
1903
130 days
1904
34 days
1905
31 days
1906
27 days
1907
29 days
1908
52 days
1909
37 days
1910
50 days
1911
102 days
1912
130 days
1913
65 days
1914
77 days
1915
27 days
1916
72 days
1917
1 day
1918
33 days
1919
19 days
1920
18 days
1921
19 days
1938
18 days
1940
139 days
1941
164 days
1942
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.
Download the Data
Data for San Miguel Island standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Miguel Island 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.