Great Falls 16St Weather Records (USC00243749)
Record envelope, standing records and threshold days for Great Falls 16St (USC00243749), Montana, United States, with 135 years of record.
Key Facts for Great Falls 16St
- Great Falls 16St (USC00243749) is a weather station in Montana, United States at 47.49 latitude and -111.28 longitude, 1,068 m (3,505 ft) above sea level.
- The station reports from 1892 to 2026, 135 years of record.
- 1,464 records set at Great Falls 16St still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Great Falls 16St set a daily record high maximum temperature of 38.9 C (102.0 F) on 2 August 2026.
About the Station
- Location: Montana, United States, 47.49 latitude, -111.28 longitude.
- Elevation: 1,068 m (3,505 ft).
- Period of record: 1892 to 2026, 135 years.
- Eligible elements: tmax, tmin, prcp, snow.
Daily Record Envelope and 2026
10 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.0 C (68.0 F) | -42.2 C (-44.0 F) | 18.3 C (64.9 F) | -20.6 C (-5.1 F) |
| Feb | 21.7 C (71.1 F) | -45.0 C (-49.0 F) | 21.7 C (71.1 F) | -25.0 C (-13.0 F) |
| Mar | 25.6 C (78.1 F) | -35.6 C (-32.1 F) | 25.0 C (77.0 F) | -19.4 C (-2.9 F) |
| Apr | 31.1 C (88.0 F) | -23.3 C (-9.9 F) | 27.2 C (81.0 F) | -6.7 C (19.9 F) |
| May | 37.8 C (100.0 F) | -11.1 C (12.0 F) | 32.8 C (91.0 F) | -3.3 C (26.1 F) |
| Jun | 38.9 C (102.0 F) | 0.0 C (32.0 F) | 30.0 C (86.0 F) | 4.4 C (39.9 F) |
| Jul | 41.7 C (107.1 F) | 1.7 C (35.1 F) | 38.9 C (102.0 F) | 8.9 C (48.0 F) |
| Aug | 39.4 C (102.9 F) | 1.1 C (34.0 F) | 38.9 C (102.0 F) | 6.7 C (44.1 F) |
| Sep | 36.1 C (97.0 F) | -12.2 C (10.0 F) | n/a | n/a |
| Oct | 32.2 C (90.0 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Nov | 23.9 C (75.0 F) | -31.7 C (-25.1 F) | n/a | n/a |
| Dec | 18.3 C (64.9 F) | -38.9 C (-38.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1892 | 20 |
| 1893 | 25 |
| 1894 | 16 |
| 1895 | 16 |
| 1896 | 41 |
| 1897 | 25 |
| 1898 | 18 |
| 1899 | 17 |
| 1900 | 24 |
| 1901 | 13 |
| 1902 | 18 |
| 1903 | 23 |
| 1904 | 6 |
| 1905 | 27 |
| 1906 | 26 |
| 1907 | 16 |
| 1908 | 10 |
| 1909 | 24 |
| 1910 | 26 |
| 1911 | 26 |
| 1912 | 13 |
| 1913 | 11 |
| 1914 | 22 |
| 1915 | 19 |
| 1916 | 41 |
| 1917 | 22 |
| 1918 | 40 |
| 1919 | 62 |
| 1920 | 16 |
| 1921 | 25 |
| 1922 | 16 |
| 1923 | 11 |
| 1924 | 24 |
| 1925 | 23 |
| 1926 | 12 |
| 1927 | 14 |
| 1928 | 26 |
| 1929 | 12 |
| 1930 | 28 |
| 1931 | 21 |
| 1932 | 26 |
| 1933 | 23 |
| 1934 | 26 |
| 1935 | 27 |
| 1936 | 66 |
| 1937 | 3 |
| 1953 | 29 |
| 1954 | 32 |
| 1955 | 27 |
| 1956 | 26 |
| 2005 | 6 |
| 2006 | 13 |
| 2007 | 19 |
| 2008 | 22 |
| 2009 | 26 |
| 2010 | 21 |
| 2011 | 15 |
| 2012 | 15 |
| 2013 | 17 |
| 2014 | 17 |
| 2015 | 26 |
| 2016 | 25 |
| 2017 | 22 |
| 2018 | 8 |
| 2019 | 13 |
| 2024 | 9 |
| 2025 | 14 |
| 2026 | 16 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1932-12-12 | Record daily snowfall | Record daily snowfall 35.6 cm (14.0 in) |
| 1933-07-25 | Record high maximum temperature | Record high maximum temperature 41.7 C (107.1 F) |
| 1936-02-15 | Record low minimum temperature | Record low minimum temperature -45.0 C (-49.0 F) |
Wettest Day of Each Month
Jun: 85.3 mm (3.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 14.2 mm (0.6 in) | 24 January 1916 |
| Feb | 23.6 mm (0.9 in) | 12 February 1897 |
| Mar | 27.7 mm (1.1 in) | 13 March 1896 |
| Apr | 40.4 mm (1.6 in) | 9 April 2017 |
| May | 71.9 mm (2.8 in) | 25 May 1953 |
| Jun | 85.3 mm (3.4 in) | 23 June 1907 |
| Jul | 45.0 mm (1.8 in) | 15 July 2012 |
| Aug | 69.1 mm (2.7 in) | 21 August 1933 |
| Sep | 38.4 mm (1.5 in) | 19 September 1925 |
| Oct | 63.8 mm (2.5 in) | 3 October 2015 |
| Nov | 29.0 mm (1.1 in) | 23 November 1892 |
| Dec | 17.8 mm (0.7 in) | 30 December 1917 |
Period of Record Coverage
1892 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1892 | 155 | 42% | No |
| 1893 | 188 | 52% | No |
| 1894 | 352 | 96% | Yes |
| 1895 | 329 | 90% | Yes |
| 1896 | 318 | 87% | No |
| 1897 | 329 | 90% | Yes |
| 1898 | 348 | 95% | Yes |
| 1899 | 365 | 100% | Yes |
| 1900 | 364 | 100% | Yes |
| 1901 | 365 | 100% | Yes |
| 1902 | 364 | 100% | Yes |
| 1903 | 359 | 98% | Yes |
| 1904 | 365 | 100% | Yes |
| 1905 | 362 | 99% | Yes |
| 1906 | 365 | 100% | Yes |
| 1907 | 363 | 99% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 361 | 99% | Yes |
| 1910 | 365 | 100% | Yes |
| 1911 | 365 | 100% | Yes |
| 1912 | 366 | 100% | Yes |
| 1913 | 365 | 100% | Yes |
| 1914 | 362 | 99% | Yes |
| 1915 | 362 | 99% | Yes |
| 1916 | 364 | 99% | Yes |
| 1917 | 363 | 99% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 364 | 100% | Yes |
| 1928 | 362 | 99% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 90 | 25% | No |
| 1953 | 363 | 99% | Yes |
| 1954 | 340 | 93% | Yes |
| 1955 | 357 | 98% | Yes |
| 1956 | 316 | 86% | No |
| 2005 | 91 | 25% | No |
| 2006 | 360 | 99% | Yes |
| 2007 | 358 | 98% | Yes |
| 2008 | 360 | 98% | Yes |
| 2009 | 361 | 99% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 364 | 100% | Yes |
| 2019 | 273 | 75% | No |
| 2024 | 161 | 44% | No |
| 2025 | 364 | 100% | Yes |
| 2026 | 242 | 66% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 2 August 2026 | Great Falls 16St, US | daily high max | 38.9 C (102.0 F) | 1.7 C (3.1 F) | 132 years | 43 of 100 (Notable) |
| 30 June 2026 | Great Falls 16St, US | daily low max | 13.9 C (57.0 F) | 3.9 C (7.0 F) | 127 years | 47 of 100 (Notable) |
| 29 June 2026 | Great Falls 16St, US | daily rain | 39.9 mm (1.6 in) | 21.6 mm (0.9 in) | 95 years | 60 of 100 (Major) |
| 29 June 2026 | Great Falls 16St, US | daily low max (Tie) | 16.7 C (62.1 F) | tie | 120 years | 10 of 100 (Routine) |
| 2 June 2026 | Great Falls 16St, US | daily low max (Tie) | 10.0 C (50.0 F) | tie | 127 years | 10 of 100 (Routine) |
| 31 May 2026 | Great Falls 16St, US | daily rain | 54.6 mm (2.1 in) | 33.5 mm (1.3 in) | 128 years | 80 of 100 (Exceptional) |
| 25 April 2026 | Great Falls 16St, US | daily low max | 2.8 C (37.0 F) | 3.3 C (5.9 F) | 119 years | 45 of 100 (Notable) |
| 3 April 2026 | Great Falls 16St, US | daily rain | 22.6 mm (0.9 in) | 7.1 mm (0.28 in) | 116 years | 20 of 100 (Routine) |
| 3 April 2026 | Great Falls 16St, US | daily snowfall | 6.9 cm (2.7 in) | 4.1 cm (1.6 in) | 127 years | 48 of 100 (Notable) |
| 21 March 2026 | Great Falls 16St, US | daily high max | 25.0 C (77.0 F) | 1.7 C (3.1 F) | 97 years | 41 of 100 (Notable) |
| 20 March 2026 | Great Falls 16St, US | daily high min | 13.9 C (57.0 F) | 5.6 C (10.1 F) | 116 years | 47 of 100 (Notable) |
| 20 March 2026 | Great Falls 16St, US | daily high max (Tie) | 22.8 C (73.0 F) | tie | 116 years | 10 of 100 (Routine) |
| 19 March 2026 | Great Falls 16St, US | daily high min | 12.8 C (55.0 F) | 5.0 C (9.0 F) | 8 years | 18 of 100 (Routine) |
| 18 March 2026 | Great Falls 16St, US | daily high min | 10.6 C (51.1 F) | 4.5 C (8.1 F) | 19 years | 21 of 100 (Routine) |
| 14 March 2026 | Great Falls 16St, US | daily rain | 10.9 mm (0.4 in) | 3.3 mm (0.13 in) | 107 years | 20 of 100 (Routine) |
| 8 March 2026 | Great Falls 16St, US | daily high min | 5.6 C (42.1 F) | 1.2 C (2.2 F) | 121 years | 41 of 100 (Notable) |
| 17 February 2026 | Great Falls 16St, US | daily high max (Tie) | 15.0 C (59.0 F) | tie | 119 years | 10 of 100 (Routine) |
| 7 February 2026 | Great Falls 16St, US | daily high max | 20.0 C (68.0 F) | 0.6 C (1.1 F) | 72 years | 31 of 100 (Routine) |
| 6 February 2026 | Great Falls 16St, US | monthly high max | 21.7 C (71.1 F) | 0.6 C (1.1 F) | 93 years | 48 of 100 (Notable) |
| 5 February 2026 | Great Falls 16St, US | monthly high max (Tie) | 21.1 C (70.0 F) | tie | 93 years | 12 of 100 (Routine) |
Climate Trend
55 complete years, 1894 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1894 | 7.1 C | -0.69 C |
| 1897 | 7.6 C | -0.18 C |
| 1898 | 7.6 C | -0.17 C |
| 1899 | 6.0 C | -1.84 C |
| 1900 | 8.8 C | +0.98 C |
| 1901 | 8.3 C | +0.46 C |
| 1902 | 7.3 C | -0.52 C |
| 1903 | 7.7 C | -0.12 C |
| 1904 | 8.0 C | +0.21 C |
| 1905 | 7.2 C | -0.56 C |
| 1906 | 7.5 C | -0.28 C |
| 1907 | 6.7 C | -1.08 C |
| 1908 | 8.3 C | +0.52 C |
| 1909 | 6.6 C | -1.23 C |
| 1910 | 9.1 C | +1.30 C |
| 1911 | 6.2 C | -1.62 C |
| 1912 | 7.6 C | -0.17 C |
| 1913 | 7.4 C | -0.37 C |
| 1914 | 8.0 C | +0.24 C |
| 1915 | 8.1 C | +0.25 C |
| 1916 | 5.1 C | -2.70 C |
| 1917 | 6.4 C | -1.40 C |
| 1918 | 8.0 C | +0.19 C |
| 1919 | 7.6 C | -0.22 C |
| 1920 | 7.4 C | -0.45 C |
| 1921 | 8.1 C | +0.31 C |
| 1922 | 6.5 C | -1.34 C |
| 1923 | 7.8 C | -0.02 C |
| 1924 | 7.0 C | -0.80 C |
| 1925 | 8.4 C | +0.60 C |
| 1926 | 8.6 C | +0.76 C |
| 1927 | 5.9 C | -1.88 C |
| 1928 | 8.1 C | +0.28 C |
| 1929 | 6.2 C | -1.63 C |
| 1930 | 8.2 C | +0.38 C |
| 1931 | 9.5 C | +1.66 C |
| 1932 | 7.7 C | -0.07 C |
| 1933 | 8.2 C | +0.37 C |
| 1934 | 9.8 C | +1.98 C |
| 1935 | 7.5 C | -0.30 C |
| 1936 | 7.4 C | -0.39 C |
| 2006 | 9.3 C | +1.46 C |
| 2007 | 9.0 C | +1.24 C |
| 2008 | 7.8 C | -0.03 C |
| 2009 | 7.6 C | -0.23 C |
| 2010 | 7.6 C | -0.21 C |
| 2011 | 7.8 C | +0.03 C |
| 2012 | 9.3 C | +1.45 C |
| 2013 | 8.6 C | +0.82 C |
| 2014 | 7.9 C | +0.10 C |
| 2015 | 9.6 C | +1.79 C |
| 2016 | 9.7 C | +1.88 C |
| 2017 | 8.7 C | +0.87 C |
| 2018 | 7.6 C | -0.21 C |
| 2025 | 8.1 C | +0.34 C |
The annual mean temperature here has risen by 0.09 C (0.04 to 0.15) per decade over 1894 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.09 C (0.04 to 0.15) per decade | 0.2 F (0.1 to 0.3) per decade | 1894 to 2025 | 55 | Rise |
| Mean daily maximum | 0.11 C (0.04 to 0.18) per decade | 0.2 F (0.1 to 0.3) per decade | 1894 to 2025 | 55 | Rise |
| Mean daily minimum | 0.08 C (0.02 to 0.14) per decade | 0.15 F (0.04 to 0.26) per decade | 1894 to 2025 | 55 | Rise |
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
1892 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.7 C (107.1 F) | 1933 | 36.7 C (98.1 F) | 68 |
| Coldest night (TNn) | -45.0 C (-49.0 F) | 1936 | -31.1 C (-24.0 F) | 68 |
| Wettest day (Rx1day) | 85.3 mm (3.4 in) | 1907 | 32.3 mm (1.3 in) | 68 |
| Wettest five days (Rx5day) | 135.6 mm (5.3 in) | 1907 | 52.4 mm (2.1 in) | 68 |
| Longest dry spell (CDD) | 75 days | 1904 | 35 days | 68 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1892 | 37.8 C (100.0 F) |
| 1893 | 39.4 C (102.9 F) |
| 1894 | 37.2 C (99.0 F) |
| 1895 | 36.1 C (97.0 F) |
| 1896 | 37.8 C (100.0 F) |
| 1897 | 36.7 C (98.1 F) |
| 1898 | 33.9 C (93.0 F) |
| 1899 | 35.6 C (96.1 F) |
| 1900 | 38.9 C (102.0 F) |
| 1901 | 35.0 C (95.0 F) |
| 1902 | 33.3 C (91.9 F) |
| 1903 | 35.6 C (96.1 F) |
| 1904 | 36.1 C (97.0 F) |
| 1905 | 33.9 C (93.0 F) |
| 1906 | 35.6 C (96.1 F) |
| 1907 | 31.1 C (88.0 F) |
| 1908 | 37.8 C (100.0 F) |
| 1909 | 34.4 C (93.9 F) |
| 1910 | 36.7 C (98.1 F) |
| 1911 | 34.4 C (93.9 F) |
| 1912 | 35.6 C (96.1 F) |
| 1913 | 36.1 C (97.0 F) |
| 1914 | 36.7 C (98.1 F) |
| 1915 | 35.6 C (96.1 F) |
| 1916 | 33.9 C (93.0 F) |
| 1917 | 37.8 C (100.0 F) |
| 1918 | 36.7 C (98.1 F) |
| 1919 | 38.9 C (102.0 F) |
| 1920 | 36.1 C (97.0 F) |
| 1921 | 38.9 C (102.0 F) |
| 1922 | 35.0 C (95.0 F) |
| 1923 | 34.4 C (93.9 F) |
| 1924 | 36.7 C (98.1 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 37.8 C (100.0 F) |
| 1927 | 33.9 C (93.0 F) |
| 1928 | 38.3 C (100.9 F) |
| 1929 | 38.9 C (102.0 F) |
| 1930 | 38.3 C (100.9 F) |
| 1931 | 39.4 C (102.9 F) |
| 1932 | 38.3 C (100.9 F) |
| 1933 | 41.7 C (107.1 F) |
| 1934 | 38.9 C (102.0 F) |
| 1935 | 39.4 C (102.9 F) |
| 1936 | 38.9 C (102.0 F) |
| 1937 | 20.0 C (68.0 F) |
| 1953 | 40.6 C (105.1 F) |
| 1954 | 37.2 C (99.0 F) |
| 1955 | 39.4 C (102.9 F) |
| 1956 | 36.7 C (98.1 F) |
| 2005 | 31.7 C (89.1 F) |
| 2006 | 37.2 C (99.0 F) |
| 2007 | 40.0 C (104.0 F) |
| 2008 | 36.7 C (98.1 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 36.1 C (97.0 F) |
| 2011 | 38.3 C (100.9 F) |
| 2012 | 37.8 C (100.0 F) |
| 2013 | 36.7 C (98.1 F) |
| 2014 | 35.0 C (95.0 F) |
| 2015 | 37.8 C (100.0 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 38.9 C (102.0 F) |
| 2018 | 38.3 C (100.9 F) |
| 2019 | 36.7 C (98.1 F) |
| 2024 | 39.4 C (102.9 F) |
| 2025 | 36.1 C (97.0 F) |
| 2026 | 38.9 C (102.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1892 | -32.8 C (-27.0 F) |
| 1893 | -41.1 C (-42.0 F) |
| 1894 | -33.3 C (-27.9 F) |
| 1895 | -32.8 C (-27.0 F) |
| 1896 | -32.8 C (-27.0 F) |
| 1897 | -30.6 C (-23.1 F) |
| 1898 | -26.1 C (-15.0 F) |
| 1899 | -37.2 C (-35.0 F) |
| 1900 | -31.1 C (-24.0 F) |
| 1901 | -30.0 C (-22.0 F) |
| 1902 | -30.6 C (-23.1 F) |
| 1903 | -31.7 C (-25.1 F) |
| 1904 | -28.9 C (-20.0 F) |
| 1905 | -34.4 C (-29.9 F) |
| 1906 | -31.1 C (-24.0 F) |
| 1907 | -32.2 C (-26.0 F) |
| 1908 | -21.7 C (-7.1 F) |
| 1909 | -42.2 C (-44.0 F) |
| 1910 | -36.7 C (-34.1 F) |
| 1911 | -36.1 C (-33.0 F) |
| 1912 | -31.7 C (-25.1 F) |
| 1913 | -30.0 C (-22.0 F) |
| 1914 | -29.4 C (-20.9 F) |
| 1915 | -29.4 C (-20.9 F) |
| 1916 | -41.1 C (-42.0 F) |
| 1917 | -34.4 C (-29.9 F) |
| 1918 | -37.8 C (-36.0 F) |
| 1919 | -38.9 C (-38.0 F) |
| 1920 | -30.6 C (-23.1 F) |
| 1921 | -30.6 C (-23.1 F) |
| 1922 | -35.6 C (-32.1 F) |
| 1923 | -36.1 C (-33.0 F) |
| 1924 | -35.6 C (-32.1 F) |
| 1925 | -25.6 C (-14.1 F) |
| 1926 | -28.3 C (-18.9 F) |
| 1927 | -36.1 C (-33.0 F) |
| 1928 | -32.8 C (-27.0 F) |
| 1929 | -38.3 C (-36.9 F) |
| 1930 | -34.4 C (-29.9 F) |
| 1931 | -23.9 C (-11.0 F) |
| 1932 | -35.6 C (-32.1 F) |
| 1933 | -32.8 C (-27.0 F) |
| 1934 | -26.7 C (-16.1 F) |
| 1935 | -33.3 C (-27.9 F) |
| 1936 | -45.0 C (-49.0 F) |
| 1937 | -33.9 C (-29.0 F) |
| 1953 | -21.7 C (-7.1 F) |
| 1954 | -38.3 C (-36.9 F) |
| 1955 | -28.9 C (-20.0 F) |
| 1956 | -30.6 C (-23.1 F) |
| 2005 | -23.3 C (-9.9 F) |
| 2006 | -29.4 C (-20.9 F) |
| 2007 | -21.7 C (-7.1 F) |
| 2008 | -29.4 C (-20.9 F) |
| 2009 | -31.1 C (-24.0 F) |
| 2010 | -30.6 C (-23.1 F) |
| 2011 | -29.4 C (-20.9 F) |
| 2012 | -27.8 C (-18.0 F) |
| 2013 | -30.6 C (-23.1 F) |
| 2014 | -33.3 C (-27.9 F) |
| 2015 | -26.7 C (-16.1 F) |
| 2016 | -29.4 C (-20.9 F) |
| 2017 | -28.3 C (-18.9 F) |
| 2018 | -31.1 C (-24.0 F) |
| 2019 | -33.3 C (-27.9 F) |
| 2024 | -15.6 C (3.9 F) |
| 2025 | -34.4 C (-29.9 F) |
| 2026 | -25.0 C (-13.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1892 | 60.2 mm (2.4 in) |
| 1893 | 21.6 mm (0.9 in) |
| 1894 | 43.4 mm (1.7 in) |
| 1895 | 23.1 mm (0.9 in) |
| 1896 | 27.7 mm (1.1 in) |
| 1897 | 33.5 mm (1.3 in) |
| 1898 | 35.1 mm (1.4 in) |
| 1899 | 20.6 mm (0.8 in) |
| 1900 | 35.6 mm (1.4 in) |
| 1901 | 26.2 mm (1.0 in) |
| 1902 | 69.9 mm (2.8 in) |
| 1903 | 51.3 mm (2.0 in) |
| 1904 | 15.7 mm (0.6 in) |
| 1905 | 19.3 mm (0.8 in) |
| 1906 | 34.3 mm (1.4 in) |
| 1907 | 85.3 mm (3.4 in) |
| 1908 | 68.6 mm (2.7 in) |
| 1909 | 32.3 mm (1.3 in) |
| 1910 | 46.7 mm (1.8 in) |
| 1911 | 18.5 mm (0.7 in) |
| 1912 | 30.7 mm (1.2 in) |
| 1913 | 19.8 mm (0.8 in) |
| 1914 | 54.9 mm (2.2 in) |
| 1915 | 50.3 mm (2.0 in) |
| 1916 | 31.8 mm (1.3 in) |
| 1917 | 38.1 mm (1.5 in) |
| 1918 | 30.0 mm (1.2 in) |
| 1919 | 21.3 mm (0.8 in) |
| 1920 | 19.8 mm (0.8 in) |
| 1921 | 25.9 mm (1.0 in) |
| 1922 | 26.7 mm (1.1 in) |
| 1923 | 49.3 mm (1.9 in) |
| 1924 | 23.9 mm (0.9 in) |
| 1925 | 38.4 mm (1.5 in) |
| 1926 | 33.8 mm (1.3 in) |
| 1927 | 40.1 mm (1.6 in) |
| 1928 | 21.3 mm (0.8 in) |
| 1929 | 16.5 mm (0.6 in) |
| 1930 | 21.6 mm (0.9 in) |
| 1931 | 22.9 mm (0.9 in) |
| 1932 | 44.5 mm (1.8 in) |
| 1933 | 69.1 mm (2.7 in) |
| 1934 | 24.6 mm (1.0 in) |
| 1935 | 8.4 mm (0.33 in) |
| 1936 | 14.5 mm (0.6 in) |
| 1937 | 5.6 mm (0.22 in) |
| 1953 | 71.9 mm (2.8 in) |
| 1954 | 50.8 mm (2.0 in) |
| 1955 | 34.8 mm (1.4 in) |
| 1956 | 14.0 mm (0.6 in) |
| 2005 | 32.3 mm (1.3 in) |
| 2006 | 48.0 mm (1.9 in) |
| 2007 | 24.9 mm (1.0 in) |
| 2008 | 29.5 mm (1.2 in) |
| 2009 | 32.3 mm (1.3 in) |
| 2010 | 26.7 mm (1.1 in) |
| 2011 | 29.0 mm (1.1 in) |
| 2012 | 45.0 mm (1.8 in) |
| 2013 | 22.1 mm (0.9 in) |
| 2014 | 65.0 mm (2.6 in) |
| 2015 | 63.8 mm (2.5 in) |
| 2016 | 57.4 mm (2.3 in) |
| 2017 | 40.4 mm (1.6 in) |
| 2018 | 32.5 mm (1.3 in) |
| 2019 | 39.6 mm (1.6 in) |
| 2024 | 17.0 mm (0.7 in) |
| 2025 | 41.1 mm (1.6 in) |
| 2026 | 54.6 mm (2.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1892 | 111.3 mm (4.4 in) |
| 1893 | 47.3 mm (1.9 in) |
| 1894 | 65.7 mm (2.6 in) |
| 1895 | 35.5 mm (1.4 in) |
| 1896 | 49.1 mm (1.9 in) |
| 1897 | 65.0 mm (2.6 in) |
| 1898 | 52.1 mm (2.1 in) |
| 1899 | 29.7 mm (1.2 in) |
| 1900 | 48.0 mm (1.9 in) |
| 1901 | 44.9 mm (1.8 in) |
| 1902 | 83.0 mm (3.3 in) |
| 1903 | 52.6 mm (2.1 in) |
| 1904 | 17.0 mm (0.7 in) |
| 1905 | 43.9 mm (1.7 in) |
| 1906 | 62.4 mm (2.5 in) |
| 1907 | 135.6 mm (5.3 in) |
| 1908 | 99.9 mm (3.9 in) |
| 1909 | 75.3 mm (3.0 in) |
| 1910 | 61.4 mm (2.4 in) |
| 1911 | 43.7 mm (1.7 in) |
| 1912 | 45.9 mm (1.8 in) |
| 1913 | 41.6 mm (1.6 in) |
| 1914 | 71.4 mm (2.8 in) |
| 1915 | 82.0 mm (3.2 in) |
| 1916 | 73.7 mm (2.9 in) |
| 1917 | 80.1 mm (3.2 in) |
| 1918 | 40.9 mm (1.6 in) |
| 1919 | 35.1 mm (1.4 in) |
| 1920 | 27.9 mm (1.1 in) |
| 1921 | 60.7 mm (2.4 in) |
| 1922 | 53.1 mm (2.1 in) |
| 1923 | 111.0 mm (4.4 in) |
| 1924 | 53.3 mm (2.1 in) |
| 1925 | 42.5 mm (1.7 in) |
| 1926 | 41.7 mm (1.6 in) |
| 1927 | 82.3 mm (3.2 in) |
| 1928 | 51.2 mm (2.0 in) |
| 1929 | 34.5 mm (1.4 in) |
| 1930 | 25.9 mm (1.0 in) |
| 1931 | 32.4 mm (1.3 in) |
| 1932 | 84.8 mm (3.3 in) |
| 1933 | 122.2 mm (4.8 in) |
| 1934 | 38.5 mm (1.5 in) |
| 1935 | 13.5 mm (0.5 in) |
| 1936 | 25.7 mm (1.0 in) |
| 1937 | 8.7 mm (0.34 in) |
| 1953 | 122.4 mm (4.8 in) |
| 1954 | 66.1 mm (2.6 in) |
| 1955 | 51.8 mm (2.0 in) |
| 1956 | 18.6 mm (0.7 in) |
| 2005 | 33.1 mm (1.3 in) |
| 2006 | 82.1 mm (3.2 in) |
| 2007 | 41.7 mm (1.6 in) |
| 2008 | 79.8 mm (3.1 in) |
| 2009 | 54.2 mm (2.1 in) |
| 2010 | 55.2 mm (2.2 in) |
| 2011 | 52.3 mm (2.1 in) |
| 2012 | 47.1 mm (1.9 in) |
| 2013 | 59.4 mm (2.3 in) |
| 2014 | 102.4 mm (4.0 in) |
| 2015 | 74.0 mm (2.9 in) |
| 2016 | 76.7 mm (3.0 in) |
| 2017 | 52.4 mm (2.1 in) |
| 2018 | 55.9 mm (2.2 in) |
| 2019 | 48.3 mm (1.9 in) |
| 2024 | 27.7 mm (1.1 in) |
| 2025 | 51.8 mm (2.0 in) |
| 2026 | 83.3 mm (3.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1892 | 39 days |
| 1893 | 40 days |
| 1894 | 43 days |
| 1895 | 42 days |
| 1896 | 35 days |
| 1897 | 48 days |
| 1898 | 25 days |
| 1899 | 39 days |
| 1900 | 38 days |
| 1901 | 72 days |
| 1902 | 39 days |
| 1903 | 35 days |
| 1904 | 75 days |
| 1905 | 29 days |
| 1906 | 29 days |
| 1907 | 62 days |
| 1908 | 39 days |
| 1909 | 24 days |
| 1910 | 39 days |
| 1911 | 17 days |
| 1912 | 27 days |
| 1913 | 28 days |
| 1914 | 31 days |
| 1915 | 54 days |
| 1916 | 27 days |
| 1917 | 33 days |
| 1918 | 38 days |
| 1919 | 46 days |
| 1920 | 39 days |
| 1921 | 45 days |
| 1922 | 37 days |
| 1923 | 37 days |
| 1924 | 19 days |
| 1925 | 30 days |
| 1926 | 33 days |
| 1927 | 22 days |
| 1928 | 40 days |
| 1929 | 27 days |
| 1930 | 29 days |
| 1931 | 39 days |
| 1932 | 33 days |
| 1933 | 26 days |
| 1934 | 41 days |
| 1935 | 32 days |
| 1936 | 31 days |
| 1937 | 24 days |
| 1953 | 75 days |
| 1954 | 69 days |
| 1955 | 45 days |
| 1956 | 21 days |
| 2005 | 25 days |
| 2006 | 38 days |
| 2007 | 32 days |
| 2008 | 28 days |
| 2009 | 45 days |
| 2010 | 51 days |
| 2011 | 18 days |
| 2012 | 48 days |
| 2013 | 22 days |
| 2014 | 21 days |
| 2015 | 47 days |
| 2016 | 49 days |
| 2017 | 59 days |
| 2018 | 28 days |
| 2019 | 27 days |
| 2024 | 35 days |
| 2025 | 18 days |
| 2026 | 28 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
55 years with a frostAcross 55 years with a frost, the median last spring frost at Great Falls 16St falls on 11 May and the median first autumn frost on 24 September, which leaves a median of 139 days between them.
Fitted over all years, the growing season changes by 0.0 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1921 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 11 May | n/a | 13 May | n/a | +0.4 days per decade |
| First autumn frost | 24 September | n/a | 22 September | n/a | +0.4 days per decade |
| Growing days | 139 days | n/a | 130 days | n/a | 0.0 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
59 years, 1893 to 2025A day with at least 32.4 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 96.4 mm (3.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 32.4 mm (1.3 in) | |
| 5 years | 47.4 mm (1.9 in) | |
| 10 years | 58.2 mm (2.3 in) | |
| 25 years | 72.7 mm (2.9 in) | |
| 50 years | 84.3 mm (3.3 in) | |
| 100 years | 96.4 mm (3.8 in) | Longer than the 59 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, 59 years of values from 1893 to 2025.
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: 85.3 mm (3.4 in) in 1907; 71.9 mm (2.8 in) in 1953; 69.9 mm (2.8 in) in 1902.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).