Thompson Falls Weather Records (USC00248207)

Record envelope, standing records and threshold days for Thompson Falls (USC00248207), Montana, United States, with 46 years of record.

Key Facts for Thompson Falls

Thompson Falls (USC00248207) is a weather station in Montana, United States at 47.60 latitude and -115.35 longitude, 744 m (2,441 ft) above sea level.
The station reports from 1911 to 1956, 46 years of record.
1,464 records set at Thompson Falls still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Thompson Falls set a daily record precipitation of 36.8 mm (1.4 in) on 21 November 1955.

About the Station

Location: Montana, United States, 47.60 latitude, -115.35 longitude.
Elevation: 744 m (2,441 ft).
Period of record: 1911 to 1956, 46 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Thompson Falls. 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 Thompson Falls, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.6 C (60.1 F)	-37.8 C (-36.0 F)	n/a	n/a
Feb	16.1 C (61.0 F)	-34.4 C (-29.9 F)	n/a	n/a
Mar	23.3 C (73.9 F)	-23.3 C (-9.9 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-17.8 C (0.0 F)	n/a	n/a
May	36.7 C (98.1 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	40.0 C (104.0 F)	-3.3 C (26.1 F)	n/a	n/a
Jul	42.8 C (109.0 F)	0.0 C (32.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	-1.1 C (30.0 F)	n/a	n/a
Sep	41.1 C (106.0 F)	-10.6 C (12.9 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-18.9 C (-2.0 F)	n/a	n/a
Nov	18.3 C (64.9 F)	-20.0 C (-4.0 F)	n/a	n/a
Dec	16.1 C (61.0 F)	-35.6 C (-32.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Thompson Falls still stand. 1919 holds the most, with 70.

Standing records at Thompson Falls by the year they were set
Year set	Standing records
1911	13
1912	25
1913	38
1914	42
1915	16
1916	47
1917	25
1918	43
1919	70
1920	28
1921	33
1922	61
1923	27
1924	56
1925	23
1926	34
1927	24
1928	28
1929	43
1930	37
1931	44
1932	35
1933	31
1934	45
1935	32
1936	66
1937	35
1938	26
1939	32
1940	34
1941	34
1942	11
1943	17
1944	23
1945	28
1946	15
1947	26
1948	14
1949	31
1950	33
1951	17
1952	23
1953	46
1954	18
1955	35

All-Time Record Progression

3 new records

3 all-time records were set at Thompson Falls between 20 January 1950 and 12 July 1953. Each dot is a new record.

When Thompson Falls set new all-time records
Date	Kind	Detail
1950-01-20	Record snow depth	Record snow depth 78.7 cm (31.0 in)
1950-01-30	Record low minimum temperature	Record low minimum temperature -37.8 C (-36.0 F)
1953-07-12	Record high maximum temperature	Record high maximum temperature 42.8 C (109.0 F)

Wettest Day of Each Month

Oct: 41.9 mm (1.6 in)

The wettest day on record for each calendar month at Thompson Falls. The most was 41.9 mm (1.6 in) on 4 October 1914.

Record daily precipitation for each month at Thompson Falls
Month	Record daily precipitation (mm)	Date
Jan	34.5 mm (1.4 in)	3 January 1913
Feb	27.9 mm (1.1 in)	9 February 1951
Mar	28.7 mm (1.1 in)	29 March 1934
Apr	25.1 mm (1.0 in)	9 April 1943
May	31.0 mm (1.2 in)	31 May 1923
Jun	36.1 mm (1.4 in)	24 June 1955
Jul	26.7 mm (1.1 in)	21 July 1913
Aug	31.8 mm (1.3 in)	14 August 1924
Sep	38.1 mm (1.5 in)	24 September 1917
Oct	41.9 mm (1.6 in)	4 October 1914
Nov	39.4 mm (1.6 in)	12 November 1930
Dec	35.8 mm (1.4 in)	9 December 1933

Period of Record Coverage

1911 to 1956

46 years of record at Thompson Falls, 1911 to 1956. 4 years have data for under 90 percent of days and are left out of rankings: 1911, 1918, 1954, 1956.

Days with data per year at Thompson Falls
Year	Days with data	Share of year	Complete
1911	127	35%	No
1912	366	100%	Yes
1913	362	99%	Yes
1914	359	98%	Yes
1915	361	99%	Yes
1916	350	96%	Yes
1917	350	96%	Yes
1918	326	89%	No
1919	355	97%	Yes
1920	360	98%	Yes
1921	360	99%	Yes
1922	338	93%	Yes
1923	361	99%	Yes
1924	346	95%	Yes
1925	334	92%	Yes
1926	333	91%	Yes
1927	334	92%	Yes
1928	341	93%	Yes
1929	346	95%	Yes
1930	359	98%	Yes
1931	363	99%	Yes
1932	363	99%	Yes
1933	363	99%	Yes
1934	363	99%	Yes
1935	363	99%	Yes
1936	363	99%	Yes
1937	363	99%	Yes
1938	364	100%	Yes
1939	363	99%	Yes
1940	364	99%	Yes
1941	351	96%	Yes
1942	358	98%	Yes
1943	355	97%	Yes
1944	363	99%	Yes
1945	364	100%	Yes
1946	363	99%	Yes
1947	363	99%	Yes
1948	356	97%	Yes
1949	342	94%	Yes
1950	343	94%	Yes
1951	353	97%	Yes
1952	350	96%	Yes
1953	364	100%	Yes
1954	270	74%	No
1955	329	90%	Yes
1956	31	8%	No

Latest Records

Latest records at Thompson Falls
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 November 1955	Thompson Falls, US	daily rain	36.8 mm (1.4 in)	16.2 mm (0.6 in)	33 years	47 of 100 (Notable)
25 October 1955	Thompson Falls, US	daily high max	23.3 C (73.9 F)	1.1 C (2.0 F)	17 years	10 of 100 (Routine)
22 October 1955	Thompson Falls, US	daily high min	5.6 C (42.1 F)	1.2 C (2.2 F)	22 years	12 of 100 (Routine)
29 September 1955	Thompson Falls, US	daily low max	12.2 C (54.0 F)	1.7 C (3.1 F)	28 years	14 of 100 (Routine)
21 September 1955	Thompson Falls, US	daily rain	11.9 mm (0.5 in)	0.7 mm (0.03 in)	24 years	12 of 100 (Routine)
16 September 1955	Thompson Falls, US	daily high min	13.9 C (57.0 F)	2.8 C (5.0 F)	32 years	20 of 100 (Routine)
15 September 1955	Thompson Falls, US	daily rain	21.6 mm (0.9 in)	11.7 mm (0.5 in)	13 years	20 of 100 (Routine)
6 September 1955	Thompson Falls, US	daily high max	37.2 C (99.0 F)	1.1 C (2.0 F)	10 years	8 of 100 (Routine)
5 September 1955	Thompson Falls, US	daily high max	38.3 C (100.9 F)	2.7 C (4.9 F)	20 years	14 of 100 (Routine)
31 August 1955	Thompson Falls, US	daily high max	37.2 C (99.0 F)	1.6 C (2.9 F)	10 years	10 of 100 (Routine)
30 August 1955	Thompson Falls, US	daily high max (Tie)	37.8 C (100.0 F)	tie	14 years	2 of 100 (Routine)
30 July 1955	Thompson Falls, US	daily low max	19.4 C (66.9 F)	1.2 C (2.2 F)	4 years	7 of 100 (Routine)
25 July 1955	Thompson Falls, US	daily rain	13.0 mm (0.5 in)	8.2 mm (0.32 in)	36 years	20 of 100 (Routine)
24 July 1955	Thompson Falls, US	daily high min (Tie)	17.8 C (64.0 F)	tie	20 years	2 of 100 (Routine)
22 July 1955	Thompson Falls, US	daily high min	16.1 C (61.0 F)	0.5 C (0.9 F)	9 years	7 of 100 (Routine)
8 July 1955	Thompson Falls, US	daily low min (Tie)	3.3 C (37.9 F)	tie	41 years	4 of 100 (Routine)
5 July 1955	Thompson Falls, US	daily rain	4.6 mm (0.18 in)	1.6 mm (0.06 in)	16 years	11 of 100 (Routine)
4 July 1955	Thompson Falls, US	daily low max	15.6 C (60.1 F)	1.1 C (2.0 F)	22 years	12 of 100 (Routine)
3 July 1955	Thompson Falls, US	daily low min	2.2 C (36.0 F)	1.1 C (2.0 F)	10 years	10 of 100 (Routine)
2 July 1955	Thompson Falls, US	monthly low max	13.3 C (55.9 F)	0.6 C (1.1 F)	39 years	26 of 100 (Routine)

Climate Trend

38 complete years, 1912 to 1953

One stripe for each of 38 complete years at Thompson Falls, 1912 to 1953. Blue stripes are years cooler than the station's own mean of 8.1 C (46.6 F); red stripes are warmer. The coolest year was 1929, at 5.1 C (41.2 F), and the warmest was 1934, at 10.5 C (51.0 F). The strongest colour marks a difference of 3.1 C (5.6 F).

Annual mean temperature at Thompson Falls as warming stripes, 1912 to 1953
Year	Annual mean temperature	Difference from the station mean
1912	7.7 C	-0.48 C
1913	6.3 C	-1.79 C
1914	7.7 C	-0.42 C
1915	7.7 C	-0.44 C
1916	5.5 C	-2.66 C
1917	7.4 C	-0.73 C
1919	6.9 C	-1.28 C
1920	7.7 C	-0.41 C
1921	7.7 C	-0.48 C
1923	7.5 C	-0.62 C
1924	7.7 C	-0.43 C
1925	9.3 C	+1.13 C
1926	8.5 C	+0.34 C
1927	7.4 C	-0.70 C
1929	5.1 C	-3.04 C
1930	6.3 C	-1.85 C
1931	7.6 C	-0.51 C
1932	7.7 C	-0.41 C
1933	8.5 C	+0.34 C
1934	10.5 C	+2.41 C
1935	7.9 C	-0.28 C
1936	8.6 C	+0.49 C
1937	7.9 C	-0.21 C
1938	9.2 C	+1.03 C
1939	9.6 C	+1.47 C
1940	9.8 C	+1.66 C
1941	9.7 C	+1.60 C
1942	8.5 C	+0.36 C
1943	8.4 C	+0.23 C
1944	9.2 C	+1.09 C
1945	9.1 C	+1.01 C
1946	9.2 C	+1.03 C
1947	9.5 C	+1.41 C
1948	8.2 C	+0.09 C
1949	8.1 C	-0.07 C
1950	7.5 C	-0.67 C
1951	7.9 C	-0.28 C
1953	10.2 C	+2.11 C

The annual mean temperature here has risen by 0.6 C (0.3 to 0.8) per decade over 1912 to 1953. In Fahrenheit: 1.0 F (0.5 to 1.5) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Thompson Falls
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.6 C (0.3 to 0.8) per decade	1.0 F (0.5 to 1.5) per decade	1912 to 1953	38	Rise
Mean daily maximum	0.6 C (0.3 to 0.9) per decade	1.0 F (0.5 to 1.6) per decade	1912 to 1953	38	Rise
Mean daily minimum	0.5 C (0.2 to 0.8) per decade	0.9 F (0.4 to 1.5) per decade	1912 to 1953	38	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

1911 to 1956

Yearly extremes at Thompson Falls: 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)	1953	38.6 C (101.5 F)	46
Coldest night (TNn)	-37.8 C (-36.0 F)	1950	-23.3 C (-9.9 F)	46
Wettest day (Rx1day)	41.9 mm (1.6 in)	1914	25.5 mm (1.0 in)	46
Wettest five days (Rx5day)	90.0 mm (3.5 in)	1933	43.1 mm (1.7 in)	46
Longest dry spell (CDD)	72 days	1917	27 days	46

Hottest day (TXx)

The hottest day of the year at Thompson Falls, 1911 to 1956. The record is 42.8 C (109.0 F) in 1953, marked on the chart; the median year is 38.6 C (101.5 F).

Hottest day (TXx) at Thompson Falls by year
Year	Hottest day (TXx)
1911	33.3 C (91.9 F)
1912	36.7 C (98.1 F)
1913	35.6 C (96.1 F)
1914	38.3 C (100.9 F)
1915	35.6 C (96.1 F)
1916	37.2 C (99.0 F)
1917	37.2 C (99.0 F)
1918	38.9 C (102.0 F)
1919	41.1 C (106.0 F)
1920	37.2 C (99.0 F)
1921	37.2 C (99.0 F)
1922	38.3 C (100.9 F)
1923	39.4 C (102.9 F)
1924	41.1 C (106.0 F)
1925	38.3 C (100.9 F)
1926	39.4 C (102.9 F)
1927	37.2 C (99.0 F)
1928	39.4 C (102.9 F)
1929	37.2 C (99.0 F)
1930	38.9 C (102.0 F)
1931	37.8 C (100.0 F)
1932	38.9 C (102.0 F)
1933	40.0 C (104.0 F)
1934	42.2 C (108.0 F)
1935	38.9 C (102.0 F)
1936	40.0 C (104.0 F)
1937	38.9 C (102.0 F)
1938	39.4 C (102.9 F)
1939	41.7 C (107.1 F)
1940	39.4 C (102.9 F)
1941	41.1 C (106.0 F)
1942	39.4 C (102.9 F)
1943	36.7 C (98.1 F)
1944	36.7 C (98.1 F)
1945	40.0 C (104.0 F)
1946	38.9 C (102.0 F)
1947	38.3 C (100.9 F)
1948	35.6 C (96.1 F)
1949	38.3 C (100.9 F)
1950	41.1 C (106.0 F)
1951	38.3 C (100.9 F)
1952	39.4 C (102.9 F)
1953	42.8 C (109.0 F)
1954	37.8 C (100.0 F)
1955	38.3 C (100.9 F)
1956	10.0 C (50.0 F)

Coldest night (TNn)

The coldest night of the year at Thompson Falls, 1911 to 1956. The record is -37.8 C (-36.0 F) in 1950, marked on the chart; the median year is -23.3 C (-9.9 F).

Coldest night (TNn) at Thompson Falls by year
Year	Coldest night (TNn)
1911	-17.8 C (0.0 F)
1912	-23.3 C (-9.9 F)
1913	-26.7 C (-16.1 F)
1914	-31.7 C (-25.1 F)
1915	-21.1 C (-6.0 F)
1916	-31.1 C (-24.0 F)
1917	-29.4 C (-20.9 F)
1918	-23.3 C (-9.9 F)
1919	-35.6 C (-32.1 F)
1920	-15.6 C (3.9 F)
1921	-20.0 C (-4.0 F)
1922	-31.1 C (-24.0 F)
1923	-26.7 C (-16.1 F)
1924	-32.8 C (-27.0 F)
1925	-17.2 C (1.0 F)
1926	-21.7 C (-7.1 F)
1927	-32.8 C (-27.0 F)
1928	-21.7 C (-7.1 F)
1929	-32.2 C (-26.0 F)
1930	-28.9 C (-20.0 F)
1931	-21.7 C (-7.1 F)
1932	-28.9 C (-20.0 F)
1933	-32.2 C (-26.0 F)
1934	-11.7 C (10.9 F)
1935	-27.2 C (-17.0 F)
1936	-32.2 C (-26.0 F)
1937	-34.4 C (-29.9 F)
1938	-17.8 C (0.0 F)
1939	-22.2 C (-8.0 F)
1940	-19.4 C (-2.9 F)
1941	-16.1 C (3.0 F)
1942	-23.9 C (-11.0 F)
1943	-26.1 C (-15.0 F)
1944	-21.7 C (-7.1 F)
1945	-20.0 C (-4.0 F)
1946	-15.0 C (5.0 F)
1947	-21.1 C (-6.0 F)
1948	-20.6 C (-5.1 F)
1949	-26.7 C (-16.1 F)
1950	-37.8 C (-36.0 F)
1951	-23.3 C (-9.9 F)
1952	-22.2 C (-8.0 F)
1953	-7.8 C (18.0 F)
1954	-21.7 C (-7.1 F)
1955	-23.3 C (-9.9 F)
1956	-21.7 C (-7.1 F)

Wettest day (Rx1day)

The wettest day of the year at Thompson Falls, 1911 to 1956. The record is 41.9 mm (1.6 in) in 1914, marked on the chart; the median year is 25.5 mm (1.0 in).

Wettest day (Rx1day) at Thompson Falls by year
Year	Wettest day (Rx1day)
1911	15.2 mm (0.6 in)
1912	16.8 mm (0.7 in)
1913	34.5 mm (1.4 in)
1914	41.9 mm (1.6 in)
1915	19.8 mm (0.8 in)
1916	21.1 mm (0.8 in)
1917	38.1 mm (1.5 in)
1918	26.7 mm (1.1 in)
1919	14.0 mm (0.6 in)
1920	23.1 mm (0.9 in)
1921	26.4 mm (1.0 in)
1922	19.8 mm (0.8 in)
1923	31.0 mm (1.2 in)
1924	31.8 mm (1.3 in)
1925	20.3 mm (0.8 in)
1926	21.6 mm (0.9 in)
1927	24.1 mm (0.9 in)
1928	17.5 mm (0.7 in)
1929	17.8 mm (0.7 in)
1930	39.4 mm (1.6 in)
1931	16.5 mm (0.6 in)
1932	30.0 mm (1.2 in)
1933	35.8 mm (1.4 in)
1934	28.7 mm (1.1 in)
1935	26.2 mm (1.0 in)
1936	25.4 mm (1.0 in)
1937	17.8 mm (0.7 in)
1938	18.0 mm (0.7 in)
1939	16.5 mm (0.6 in)
1940	26.2 mm (1.0 in)
1941	25.7 mm (1.0 in)
1942	27.9 mm (1.1 in)
1943	25.1 mm (1.0 in)
1944	26.4 mm (1.0 in)
1945	22.6 mm (0.9 in)
1946	30.0 mm (1.2 in)
1947	27.9 mm (1.1 in)
1948	28.4 mm (1.1 in)
1949	22.9 mm (0.9 in)
1950	26.4 mm (1.0 in)
1951	27.9 mm (1.1 in)
1952	20.1 mm (0.8 in)
1953	23.1 mm (0.9 in)
1954	30.7 mm (1.2 in)
1955	36.8 mm (1.4 in)
1956	5.1 mm (0.20 in)

Wettest five days (Rx5day)

The wettest five days of the year at Thompson Falls, 1911 to 1956. The record is 90.0 mm (3.5 in) in 1933, marked on the chart; the median year is 43.1 mm (1.7 in).

Wettest five days (Rx5day) at Thompson Falls by year
Year	Wettest five days (Rx5day)
1911	29.7 mm (1.2 in)
1912	35.5 mm (1.4 in)
1913	67.0 mm (2.6 in)
1914	73.4 mm (2.9 in)
1915	33.1 mm (1.3 in)
1916	53.3 mm (2.1 in)
1917	78.5 mm (3.1 in)
1918	43.7 mm (1.7 in)
1919	33.4 mm (1.3 in)
1920	42.0 mm (1.7 in)
1921	43.5 mm (1.7 in)
1922	31.3 mm (1.2 in)
1923	65.5 mm (2.6 in)
1924	41.1 mm (1.6 in)
1925	35.1 mm (1.4 in)
1926	36.5 mm (1.4 in)
1927	65.0 mm (2.6 in)
1928	35.3 mm (1.4 in)
1929	67.1 mm (2.6 in)
1930	52.9 mm (2.1 in)
1931	36.0 mm (1.4 in)
1932	53.8 mm (2.1 in)
1933	90.0 mm (3.5 in)
1934	71.9 mm (2.8 in)
1935	33.6 mm (1.3 in)
1936	35.9 mm (1.4 in)
1937	42.7 mm (1.7 in)
1938	35.0 mm (1.4 in)
1939	36.6 mm (1.4 in)
1940	48.3 mm (1.9 in)
1941	41.7 mm (1.6 in)
1942	53.3 mm (2.1 in)
1943	45.1 mm (1.8 in)
1944	29.9 mm (1.2 in)
1945	39.9 mm (1.6 in)
1946	73.3 mm (2.9 in)
1947	52.5 mm (2.1 in)
1948	50.3 mm (2.0 in)
1949	34.7 mm (1.4 in)
1950	51.6 mm (2.0 in)
1951	65.8 mm (2.6 in)
1952	41.7 mm (1.6 in)
1953	61.5 mm (2.4 in)
1954	53.8 mm (2.1 in)
1955	41.2 mm (1.6 in)
1956	7.9 mm (0.31 in)

Longest dry spell (CDD)

The longest dry spell of the year at Thompson Falls, 1911 to 1956. The record is 72 days in 1917, marked on the chart; the median year is 27 days.

Longest dry spell (CDD) at Thompson Falls by year
Year	Longest dry spell (CDD)
1911	13 days
1912	22 days
1913	25 days
1914	25 days
1915	18 days
1916	20 days
1917	72 days
1918	18 days
1919	32 days
1920	25 days
1921	25 days
1922	26 days
1923	26 days
1924	30 days
1925	41 days
1926	45 days
1927	21 days
1928	34 days
1929	67 days
1930	27 days
1931	36 days
1932	18 days
1933	25 days
1934	61 days
1935	27 days
1936	24 days
1937	19 days
1938	40 days
1939	42 days
1940	29 days
1941	15 days
1942	18 days
1943	40 days
1944	34 days
1945	40 days
1946	27 days
1947	25 days
1948	30 days
1949	23 days
1950	20 days
1951	38 days
1952	47 days
1953	36 days
1954	28 days
1955	50 days
1956	9 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

38 years with a frost

Across 38 years with a frost, the median last spring frost at Thompson Falls falls on 27 May and the median first autumn frost on 17 September, which leaves a median of 119 days between them.

Fitted over all years, the growing season changes by +10.0 days per decade at this station.

Frost dates and growing season at Thompson Falls
Measure	Median, all years	Earliest period	Recent period (1921 to 1953)	Recent against earliest	Fitted trend
Last spring frost	27 May	n/a	25 May	n/a	-3.3 days per decade
First autumn frost	17 September	n/a	19 September	n/a	+6.6 days per decade
Growing days	119 days	n/a	123 days	n/a	+10.0 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

42 years, 1912 to 1953

A day with at least 24.5 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 43.8 mm (1.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Thompson Falls: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	24.5 mm (1.0 in)
5 years	30.5 mm (1.2 in)
10 years	34.1 mm (1.3 in)
25 years	38.3 mm (1.5 in)
50 years	41.2 mm (1.6 in)	Longer than the 42 years of record
100 years	43.8 mm (1.7 in)	Longer than the 42 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, 42 years of values from 1912 to 1953.

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: 41.9 mm (1.6 in) in 1914; 39.4 mm (1.6 in) in 1930; 38.1 mm (1.5 in) in 1917.

Download the Data

Data for Thompson Falls standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Thompson Falls 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.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).