Record envelope, standing records and threshold days for Geraldine 6 SE (USC00243455), Montana, United States, with 46 years of record.
Key Facts for Geraldine 6 SE
Geraldine 6 SE (USC00243455) is a weather station in Montana, United States at 47.53 latitude and -110.17 longitude, 1,052 m (3,451 ft) above sea level.
The station reports from 1905 to 1950, 46 years of record.
1,464 records set at Geraldine 6 SE still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Geraldine 6 SE set a daily record high maximum temperature of 16.1 C (61.0 F) on 21 December 1950.
About the Station
Location: Montana, United States, 47.53 latitude, -110.17 longitude.
Elevation: 1,052 m (3,451 ft).
Period of record: 1905 to 1950, 46 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 Geraldine 6 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 Geraldine 6 SE, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-38.9 C (-38.0 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-39.4 C (-38.9 F)
n/a
n/a
Mar
25.0 C (77.0 F)
-32.2 C (-26.0 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-23.3 C (-9.9 F)
n/a
n/a
May
36.1 C (97.0 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
41.7 C (107.1 F)
4.4 C (39.9 F)
n/a
n/a
Aug
41.1 C (106.0 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-9.4 C (15.1 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Nov
27.8 C (82.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Dec
23.9 C (75.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Geraldine 6 SE still stand. 1936 holds the most, with 96.
Standing records at Geraldine 6 SE by the year they were set
Year set
Standing records
1905
29
1906
53
1907
39
1908
30
1909
53
1910
67
1911
41
1912
38
1913
40
1919
55
1920
30
1921
55
1922
41
1923
20
1924
42
1925
41
1926
37
1927
38
1928
32
1929
39
1930
39
1931
35
1932
39
1933
31
1934
34
1935
33
1936
96
1937
20
1938
13
1939
48
1940
24
1941
28
1942
15
1943
42
1944
19
1945
15
1946
18
1947
18
1948
10
1949
24
1950
43
Wettest Day of Each Month
Jun: 77.5 mm (3.1 in)
The wettest day on record for each calendar month at Geraldine 6 SE. The most was 77.5 mm (3.1 in) on 23 June 1907.
Record daily precipitation for each month at Geraldine 6 SE
Month
Record daily precipitation (mm)
Date
Jan
27.9 mm (1.1 in)
3 January 1913
Feb
31.8 mm (1.3 in)
14 February 1910
Mar
25.1 mm (1.0 in)
6 March 1950
Apr
26.9 mm (1.1 in)
8 April 1933
May
52.1 mm (2.1 in)
27 May 1908
Jun
77.5 mm (3.1 in)
23 June 1907
Jul
68.6 mm (2.7 in)
4 July 1909
Aug
43.2 mm (1.7 in)
21 August 1933
Sep
35.3 mm (1.4 in)
7 September 1941
Oct
31.8 mm (1.3 in)
20 October 1908
Nov
24.6 mm (1.0 in)
17 November 1941
Dec
29.2 mm (1.1 in)
1 December 1921
Period of Record Coverage
1905 to 1950
Complete yearUnder 90 percent of days
41 years of record at Geraldine 6 SE, 1905 to 1950. 3 years have data for under 90 percent of days and are left out of rankings: 1905, 1913, 1919.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at Geraldine 6 SE, 1906 to 1950. Blue stripes are years cooler than the station's own mean of 7.7 C (45.9 F); red stripes are warmer. The coolest year was 1927, at 5.8 C (42.5 F), and the warmest was 1939, at 9.6 C (49.2 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Geraldine 6 SE as warming stripes, 1906 to 1950
Year
Annual mean temperature
Difference from the station mean
1906
8.0 C
+0.27 C
1908
8.4 C
+0.63 C
1909
6.4 C
-1.31 C
1910
9.2 C
+1.50 C
1911
6.4 C
-1.36 C
1912
7.3 C
-0.48 C
1920
6.9 C
-0.86 C
1921
7.7 C
-0.06 C
1922
6.2 C
-1.50 C
1923
7.9 C
+0.15 C
1924
6.7 C
-1.06 C
1925
8.1 C
+0.35 C
1926
8.6 C
+0.85 C
1927
5.8 C
-1.90 C
1928
8.4 C
+0.67 C
1929
6.4 C
-1.34 C
1930
8.3 C
+0.59 C
1931
9.4 C
+1.64 C
1932
7.6 C
-0.17 C
1933
8.0 C
+0.29 C
1934
9.5 C
+1.80 C
1935
7.3 C
-0.46 C
1936
7.9 C
+0.13 C
1937
7.3 C
-0.47 C
1938
8.7 C
+0.97 C
1939
9.6 C
+1.85 C
1940
8.4 C
+0.63 C
1941
8.8 C
+1.02 C
1942
7.9 C
+0.18 C
1943
7.7 C
-0.05 C
1944
7.8 C
+0.05 C
1945
7.3 C
-0.41 C
1946
8.5 C
+0.78 C
1947
7.7 C
0.00 C
1948
7.3 C
-0.43 C
1949
7.1 C
-0.60 C
1950
6.0 C
-1.78 C
The fitted trend in annual mean temperature here over 1906 to 1950 is 0.1 C (-0.2 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.4 to 0.6) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Geraldine 6 SE
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.2 to 0.3) per decade
0.1 F (-0.4 to 0.6) per decade
1906 to 1950
37
Not clearly different from zero
Mean daily maximum
0.1 C (-0.2 to 0.4) per decade
0.2 F (-0.3 to 0.7) per decade
1906 to 1950
37
Not clearly different from zero
Mean daily minimum
0.02 C (-0.24 to 0.28) per decade
0.04 F (-0.43 to 0.50) per decade
1906 to 1950
37
Not clearly different from zero
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
1905 to 1950
Yearly extremes at Geraldine 6 SE: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1929
37.8 C (100.0 F)
41
Coldest night (TNn)
-39.4 C (-38.9 F)
1936
-33.3 C (-27.9 F)
41
Wettest day (Rx1day)
77.5 mm (3.1 in)
1907
31.5 mm (1.2 in)
41
Wettest five days (Rx5day)
132.9 mm (5.2 in)
1909
51.1 mm (2.0 in)
41
Longest dry spell (CDD)
53 days
1908
32 days
41
Hottest day (TXx)
The hottest day of the year at Geraldine 6 SE, 1905 to 1950. The record is 41.7 C (107.1 F) in 1929, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Geraldine 6 SE by year
Year
Hottest day (TXx)
1905
35.0 C (95.0 F)
1906
37.8 C (100.0 F)
1907
31.7 C (89.1 F)
1908
40.0 C (104.0 F)
1909
35.6 C (96.1 F)
1910
38.9 C (102.0 F)
1911
36.1 C (97.0 F)
1912
36.1 C (97.0 F)
1913
36.7 C (98.1 F)
1919
38.9 C (102.0 F)
1920
37.8 C (100.0 F)
1921
40.0 C (104.0 F)
1922
36.7 C (98.1 F)
1923
34.4 C (93.9 F)
1924
37.2 C (99.0 F)
1925
38.3 C (100.9 F)
1926
38.9 C (102.0 F)
1927
35.0 C (95.0 F)
1928
38.3 C (100.9 F)
1929
41.7 C (107.1 F)
1930
40.6 C (105.1 F)
1931
41.7 C (107.1 F)
1932
37.8 C (100.0 F)
1933
41.7 C (107.1 F)
1934
39.4 C (102.9 F)
1935
38.9 C (102.0 F)
1936
41.7 C (107.1 F)
1937
40.6 C (105.1 F)
1938
36.7 C (98.1 F)
1939
39.4 C (102.9 F)
1940
41.1 C (106.0 F)
1941
41.1 C (106.0 F)
1942
36.7 C (98.1 F)
1943
36.7 C (98.1 F)
1944
35.6 C (96.1 F)
1945
38.9 C (102.0 F)
1946
37.2 C (99.0 F)
1947
37.8 C (100.0 F)
1948
36.7 C (98.1 F)
1949
41.1 C (106.0 F)
1950
36.1 C (97.0 F)
Coldest night (TNn)
The coldest night of the year at Geraldine 6 SE, 1905 to 1950. The record is -39.4 C (-38.9 F) in 1936, marked on the chart; the median year is -33.3 C (-27.9 F).
Coldest night (TNn) at Geraldine 6 SE by year
Year
Coldest night (TNn)
1905
-27.2 C (-17.0 F)
1906
-32.2 C (-26.0 F)
1907
-33.9 C (-29.0 F)
1908
-26.1 C (-15.0 F)
1909
-37.8 C (-36.0 F)
1910
-36.1 C (-33.0 F)
1911
-36.1 C (-33.0 F)
1912
-31.1 C (-24.0 F)
1913
-33.3 C (-27.9 F)
1919
-35.6 C (-32.1 F)
1920
-31.7 C (-25.1 F)
1921
-33.3 C (-27.9 F)
1922
-31.7 C (-25.1 F)
1923
-37.2 C (-35.0 F)
1924
-37.8 C (-36.0 F)
1925
-26.1 C (-15.0 F)
1926
-27.2 C (-17.0 F)
1927
-35.6 C (-32.1 F)
1928
-31.7 C (-25.1 F)
1929
-38.9 C (-38.0 F)
1930
-35.6 C (-32.1 F)
1931
-23.3 C (-9.9 F)
1932
-33.3 C (-27.9 F)
1933
-33.3 C (-27.9 F)
1934
-30.0 C (-22.0 F)
1935
-35.0 C (-31.0 F)
1936
-39.4 C (-38.9 F)
1937
-33.9 C (-29.0 F)
1938
-28.9 C (-20.0 F)
1939
-36.7 C (-34.1 F)
1940
-30.0 C (-22.0 F)
1941
-29.4 C (-20.9 F)
1942
-32.8 C (-27.0 F)
1943
-35.0 C (-31.0 F)
1944
-24.4 C (-11.9 F)
1945
-30.6 C (-23.1 F)
1946
-27.2 C (-17.0 F)
1947
-31.1 C (-24.0 F)
1948
-26.7 C (-16.1 F)
1949
-34.4 C (-29.9 F)
1950
-37.8 C (-36.0 F)
Wettest day (Rx1day)
The wettest day of the year at Geraldine 6 SE, 1905 to 1950. The record is 77.5 mm (3.1 in) in 1907, marked on the chart; the median year is 31.5 mm (1.2 in).
Wettest day (Rx1day) at Geraldine 6 SE by year
Year
Wettest day (Rx1day)
1905
25.9 mm (1.0 in)
1906
65.3 mm (2.6 in)
1907
77.5 mm (3.1 in)
1908
52.1 mm (2.1 in)
1909
68.6 mm (2.7 in)
1910
35.1 mm (1.4 in)
1911
27.9 mm (1.1 in)
1912
29.2 mm (1.1 in)
1913
27.9 mm (1.1 in)
1919
31.8 mm (1.3 in)
1920
26.2 mm (1.0 in)
1921
43.7 mm (1.7 in)
1922
15.5 mm (0.6 in)
1923
44.7 mm (1.8 in)
1924
25.4 mm (1.0 in)
1925
43.9 mm (1.7 in)
1926
30.7 mm (1.2 in)
1927
28.2 mm (1.1 in)
1928
34.3 mm (1.4 in)
1929
30.5 mm (1.2 in)
1930
23.6 mm (0.9 in)
1931
24.1 mm (0.9 in)
1932
38.4 mm (1.5 in)
1933
43.2 mm (1.7 in)
1934
31.5 mm (1.2 in)
1935
20.1 mm (0.8 in)
1936
16.8 mm (0.7 in)
1937
24.6 mm (1.0 in)
1938
48.8 mm (1.9 in)
1939
26.2 mm (1.0 in)
1940
22.6 mm (0.9 in)
1941
35.3 mm (1.4 in)
1942
46.5 mm (1.8 in)
1943
34.5 mm (1.4 in)
1944
35.6 mm (1.4 in)
1945
27.7 mm (1.1 in)
1946
22.6 mm (0.9 in)
1947
63.5 mm (2.5 in)
1948
49.5 mm (1.9 in)
1949
26.2 mm (1.0 in)
1950
41.9 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Geraldine 6 SE, 1905 to 1950. The record is 132.9 mm (5.2 in) in 1909, marked on the chart; the median year is 51.1 mm (2.0 in).
Wettest five days (Rx5day) at Geraldine 6 SE by year
Year
Wettest five days (Rx5day)
1905
74.5 mm (2.9 in)
1906
106.0 mm (4.2 in)
1907
121.7 mm (4.8 in)
1908
40.7 mm (1.6 in)
1909
132.9 mm (5.2 in)
1910
49.0 mm (1.9 in)
1911
53.4 mm (2.1 in)
1912
49.6 mm (2.0 in)
1913
54.6 mm (2.1 in)
1919
49.1 mm (1.9 in)
1920
45.3 mm (1.8 in)
1921
62.7 mm (2.5 in)
1922
26.9 mm (1.1 in)
1923
99.3 mm (3.9 in)
1924
36.1 mm (1.4 in)
1925
51.1 mm (2.0 in)
1926
43.7 mm (1.7 in)
1927
66.5 mm (2.6 in)
1928
50.6 mm (2.0 in)
1929
58.4 mm (2.3 in)
1930
25.4 mm (1.0 in)
1931
47.0 mm (1.9 in)
1932
85.9 mm (3.4 in)
1933
90.5 mm (3.6 in)
1934
52.9 mm (2.1 in)
1935
24.3 mm (1.0 in)
1936
23.1 mm (0.9 in)
1937
47.0 mm (1.9 in)
1938
73.5 mm (2.9 in)
1939
67.8 mm (2.7 in)
1940
45.0 mm (1.8 in)
1941
51.1 mm (2.0 in)
1942
69.1 mm (2.7 in)
1943
78.4 mm (3.1 in)
1944
42.7 mm (1.7 in)
1945
72.0 mm (2.8 in)
1946
38.1 mm (1.5 in)
1947
96.5 mm (3.8 in)
1948
69.3 mm (2.7 in)
1949
39.6 mm (1.6 in)
1950
44.0 mm (1.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Geraldine 6 SE, 1905 to 1950. The record is 53 days in 1908, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Geraldine 6 SE by year
Year
Longest dry spell (CDD)
1905
30 days
1906
23 days
1907
37 days
1908
53 days
1909
19 days
1910
22 days
1911
19 days
1912
26 days
1913
18 days
1919
34 days
1920
35 days
1921
38 days
1922
36 days
1923
42 days
1924
33 days
1925
30 days
1926
21 days
1927
29 days
1928
45 days
1929
29 days
1930
29 days
1931
48 days
1932
23 days
1933
26 days
1934
34 days
1935
35 days
1936
32 days
1937
41 days
1938
24 days
1939
31 days
1940
42 days
1941
42 days
1942
30 days
1943
29 days
1944
34 days
1945
26 days
1946
31 days
1947
51 days
1948
34 days
1949
49 days
1950
36 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
37 years with a frost
Across 37 years with a frost, the median last spring frost at Geraldine 6 SE falls on 13 May and the median first autumn frost on 23 September, which leaves a median of 134 days between them.
Fitted over all years, the growing season changes by -2.3 days per decade at this station.
Frost dates and growing season at Geraldine 6 SE
Measure
Median, all years
Earliest period
Recent period (1921 to 1950)
Recent against earliest
Fitted trend
Last spring frost
13 May
n/a
15 May
n/a
+3.3 days per decade
First autumn frost
23 September
n/a
24 September
n/a
+1.0 days per decade
Growing days
134 days
n/a
131 days
n/a
-2.3 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
37 years, 1906 to 1950
A day with at least 33.4 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 90.3 mm (3.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Geraldine 6 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
33.4 mm (1.3 in)
5 years
46.6 mm (1.8 in)
10 years
56.1 mm (2.2 in)
25 years
69.1 mm (2.7 in)
50 years
79.4 mm (3.1 in)
Longer than the 37 years of record
100 years
90.3 mm (3.6 in)
Longer than the 37 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, 37 years of values from 1906 to 1950.
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: 77.5 mm (3.1 in) in 1907; 68.6 mm (2.7 in) in 1909; 65.3 mm (2.6 in) in 1906.
Download the Data
Data for Geraldine 6 SE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Geraldine 6 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.