Boswell Weather Records (CA001140905)

Record envelope, standing records and threshold days for Boswell (CA001140905), British Columbia, Canada, with 30 years of record.

Key Facts for Boswell

Boswell (CA001140905) is a weather station in British Columbia, Canada at 49.48 latitude and -116.75 longitude, 573 m (1,880 ft) above sea level.
The station reports from 1911 to 1940, 30 years of record.
1,464 records set at Boswell still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: British Columbia, Canada, 49.48 latitude, -116.75 longitude.
Elevation: 573 m (1,880 ft).
Period of record: 1911 to 1940, 30 years.
Eligible elements: none yet.

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 Boswell. 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 Boswell, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.3 C (55.9 F)	-22.2 C (-8.0 F)	n/a	n/a
Feb	15.0 C (59.0 F)	-22.2 C (-8.0 F)	n/a	n/a
Mar	16.7 C (62.1 F)	-12.2 C (10.0 F)	n/a	n/a
Apr	28.3 C (82.9 F)	-9.4 C (15.1 F)	n/a	n/a
May	35.0 C (95.0 F)	-1.7 C (28.9 F)	n/a	n/a
Jun	35.0 C (95.0 F)	1.1 C (34.0 F)	n/a	n/a
Jul	37.8 C (100.0 F)	2.8 C (37.0 F)	n/a	n/a
Aug	35.6 C (96.1 F)	4.4 C (39.9 F)	n/a	n/a
Sep	36.1 C (97.0 F)	-3.9 C (25.0 F)	n/a	n/a
Oct	26.1 C (79.0 F)	-15.6 C (3.9 F)	n/a	n/a
Nov	16.1 C (61.0 F)	-11.7 C (10.9 F)	n/a	n/a
Dec	17.2 C (63.0 F)	-21.7 C (-7.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Boswell still stand. 1936 holds the most, with 96.

Standing records at Boswell by the year they were set
Year set	Standing records
1911	10
1914	47
1915	51
1916	76
1917	40
1918	60
1919	82
1920	37
1921	56
1922	40
1923	31
1924	88
1925	52
1926	65
1927	51
1928	58
1929	32
1930	57
1931	50
1932	42
1933	77
1934	82
1935	60
1936	96
1937	36
1938	69
1940	19

Wettest Day of Each Month

Sep: 42.4 mm (1.7 in)

The wettest day on record for each calendar month at Boswell. The most was 42.4 mm (1.7 in) on 11 September 1927.

Record daily precipitation for each month at Boswell
Month	Record daily precipitation (mm)	Date
Jan	35.6 mm (1.4 in)	20 January 1935
Feb	33.0 mm (1.3 in)	15 February 1923
Mar	31.2 mm (1.2 in)	27 March 1934
Apr	22.1 mm (0.9 in)	19 April 1914
May	21.3 mm (0.8 in)	31 May 1923
Jun	23.1 mm (0.9 in)	30 June 1928
Jul	22.9 mm (0.9 in)	31 July 1915
Aug	27.4 mm (1.1 in)	26 August 1928
Sep	42.4 mm (1.7 in)	11 September 1927
Oct	25.4 mm (1.0 in)	27 October 1931
Nov	26.7 mm (1.1 in)	4 November 1916
Dec	40.6 mm (1.6 in)	26 December 1923

Period of Record Coverage

1911 to 1940

27 years of record at Boswell, 1911 to 1940. 5 years have data for under 90 percent of days and are left out of rankings: 1911, 1917, 1918, 1938, 1940.

Days with data per year at Boswell
Year	Days with data	Share of year	Complete
1911	122	33%	No
1914	333	91%	Yes
1915	365	100%	Yes
1916	366	100%	Yes
1917	247	68%	No
1918	312	85%	No
1919	355	97%	Yes
1920	366	100%	Yes
1921	365	100%	Yes
1922	365	100%	Yes
1923	365	100%	Yes
1924	365	100%	Yes
1925	365	100%	Yes
1926	364	100%	Yes
1927	365	100%	Yes
1928	366	100%	Yes
1929	365	100%	Yes
1930	364	100%	Yes
1931	365	100%	Yes
1932	356	97%	Yes
1933	365	100%	Yes
1934	354	97%	Yes
1935	356	98%	Yes
1936	364	99%	Yes
1937	363	99%	Yes
1938	295	81%	No
1940	73	20%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

19 complete years, 1915 to 1937

One stripe for each of 19 complete years at Boswell, 1915 to 1937. Blue stripes are years cooler than the station's own mean of 7.9 C (46.3 F); red stripes are warmer. The coolest year was 1916, at 6.2 C (43.1 F), and the warmest was 1925, at 9.2 C (48.6 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Boswell as warming stripes, 1915 to 1937
Year	Annual mean temperature	Difference from the station mean
1915	8.6 C	+0.68 C
1916	6.2 C	-1.75 C
1919	7.5 C	-0.42 C
1920	7.6 C	-0.34 C
1921	8.4 C	+0.47 C
1922	7.8 C	-0.11 C
1923	8.2 C	+0.26 C
1924	8.2 C	+0.23 C
1925	9.2 C	+1.26 C
1926	8.7 C	+0.76 C
1927	6.5 C	-1.48 C
1928	8.1 C	+0.13 C
1929	7.5 C	-0.46 C
1930	8.3 C	+0.33 C
1931	8.2 C	+0.30 C
1932	7.6 C	-0.36 C
1933	8.3 C	+0.40 C
1936	8.2 C	+0.29 C
1937	7.7 C	-0.24 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

1911 to 1940

Yearly extremes at Boswell: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1936	33.9 C (93.0 F)	27
Coldest night (TNn)	-22.2 C (-8.0 F)	1929	-17.8 C (0.0 F)	27
Wettest day (Rx1day)	42.4 mm (1.7 in)	1927	26.7 mm (1.1 in)	27
Wettest five days (Rx5day)	99.1 mm (3.9 in)	1929	51.6 mm (2.0 in)	27
Longest dry spell (CDD)	52 days	1934	27 days	27

Hottest day (TXx)

The hottest day of the year at Boswell, 1911 to 1940. The record is 37.8 C (100.0 F) in 1936, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Boswell by year
Year	Hottest day (TXx)
1911	28.3 C (82.9 F)
1914	35.6 C (96.1 F)
1915	32.2 C (90.0 F)
1916	31.1 C (88.0 F)
1917	30.6 C (87.1 F)
1918	35.0 C (95.0 F)
1919	35.0 C (95.0 F)
1920	31.7 C (89.1 F)
1921	32.8 C (91.0 F)
1922	33.9 C (93.0 F)
1923	32.2 C (90.0 F)
1924	35.6 C (96.1 F)
1925	33.3 C (91.9 F)
1926	33.9 C (93.0 F)
1927	31.1 C (88.0 F)
1928	36.7 C (98.1 F)
1929	35.0 C (95.0 F)
1930	33.9 C (93.0 F)
1931	35.6 C (96.1 F)
1932	34.4 C (93.9 F)
1933	36.7 C (98.1 F)
1934	36.7 C (98.1 F)
1935	31.7 C (89.1 F)
1936	37.8 C (100.0 F)
1937	35.6 C (96.1 F)
1938	37.8 C (100.0 F)
1940	30.6 C (87.1 F)

Coldest night (TNn)

The coldest night of the year at Boswell, 1911 to 1940. The record is -22.2 C (-8.0 F) in 1929, marked on the chart; the median year is -17.8 C (0.0 F).

Coldest night (TNn) at Boswell by year
Year	Coldest night (TNn)
1911	-7.2 C (19.0 F)
1914	-17.8 C (0.0 F)
1915	-12.2 C (10.0 F)
1916	-21.1 C (-6.0 F)
1917	-17.8 C (0.0 F)
1918	-17.2 C (1.0 F)
1919	-17.8 C (0.0 F)
1920	-13.9 C (7.0 F)
1921	-17.2 C (1.0 F)
1922	-15.6 C (3.9 F)
1923	-21.7 C (-7.1 F)
1924	-21.7 C (-7.1 F)
1925	-11.1 C (12.0 F)
1926	-17.8 C (0.0 F)
1927	-21.7 C (-7.1 F)
1928	-17.8 C (0.0 F)
1929	-22.2 C (-8.0 F)
1930	-20.6 C (-5.1 F)
1931	-9.4 C (15.1 F)
1932	-18.3 C (-0.9 F)
1933	-22.2 C (-8.0 F)
1934	-10.0 C (14.0 F)
1935	-15.6 C (3.9 F)
1936	-22.2 C (-8.0 F)
1937	-19.4 C (-2.9 F)
1938	-12.2 C (10.0 F)
1940	-1.1 C (30.0 F)

Wettest day (Rx1day)

The wettest day of the year at Boswell, 1911 to 1940. The record is 42.4 mm (1.7 in) in 1927, marked on the chart; the median year is 26.7 mm (1.1 in).

Wettest day (Rx1day) at Boswell by year
Year	Wettest day (Rx1day)
1911	15.7 mm (0.6 in)
1914	24.9 mm (1.0 in)
1915	22.9 mm (0.9 in)
1916	27.7 mm (1.1 in)
1917	25.4 mm (1.0 in)
1918	22.9 mm (0.9 in)
1919	30.5 mm (1.2 in)
1920	25.1 mm (1.0 in)
1921	15.2 mm (0.6 in)
1922	30.5 mm (1.2 in)
1923	40.6 mm (1.6 in)
1924	26.7 mm (1.1 in)
1925	20.6 mm (0.8 in)
1926	32.3 mm (1.3 in)
1927	42.4 mm (1.7 in)
1928	27.4 mm (1.1 in)
1929	30.5 mm (1.2 in)
1930	24.1 mm (0.9 in)
1931	25.4 mm (1.0 in)
1932	27.9 mm (1.1 in)
1933	35.6 mm (1.4 in)
1934	31.2 mm (1.2 in)
1935	35.6 mm (1.4 in)
1936	30.5 mm (1.2 in)
1937	22.9 mm (0.9 in)
1938	24.4 mm (1.0 in)
1940	16.5 mm (0.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Boswell, 1911 to 1940. The record is 99.1 mm (3.9 in) in 1929, marked on the chart; the median year is 51.6 mm (2.0 in).

Wettest five days (Rx5day) at Boswell by year
Year	Wettest five days (Rx5day)
1911	27.6 mm (1.1 in)
1914	57.5 mm (2.3 in)
1915	43.5 mm (1.7 in)
1916	60.7 mm (2.4 in)
1917	51.6 mm (2.0 in)
1918	30.8 mm (1.2 in)
1919	76.8 mm (3.0 in)
1920	58.1 mm (2.3 in)
1921	43.1 mm (1.7 in)
1922	60.0 mm (2.4 in)
1923	53.3 mm (2.1 in)
1924	44.7 mm (1.8 in)
1925	37.6 mm (1.5 in)
1926	46.8 mm (1.8 in)
1927	61.3 mm (2.4 in)
1928	67.8 mm (2.7 in)
1929	99.1 mm (3.9 in)
1930	38.9 mm (1.5 in)
1931	56.1 mm (2.2 in)
1932	38.2 mm (1.5 in)
1933	54.7 mm (2.2 in)
1934	49.2 mm (1.9 in)
1935	63.6 mm (2.5 in)
1936	51.1 mm (2.0 in)
1937	47.1 mm (1.9 in)
1938	57.4 mm (2.3 in)
1940	29.4 mm (1.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Boswell, 1911 to 1940. The record is 52 days in 1934, marked on the chart; the median year is 27 days.

Longest dry spell (CDD) at Boswell by year
Year	Longest dry spell (CDD)
1911	21 days
1914	33 days
1915	19 days
1916	29 days
1917	22 days
1918	26 days
1919	27 days
1920	22 days
1921	23 days
1922	26 days
1923	31 days
1924	35 days
1925	19 days
1926	40 days
1927	25 days
1928	30 days
1929	30 days
1930	29 days
1931	28 days
1932	20 days
1933	27 days
1934	52 days
1935	27 days
1936	33 days
1937	16 days
1938	23 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.

Download the Data

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

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).