Belleville Par Lab Weather Records (CA006150717)

Record envelope, standing records and threshold days for Belleville Par Lab (CA006150717), Ontario, Canada, with 31 years of record.

Key Facts for Belleville Par Lab

Belleville Par Lab (CA006150717) is a weather station in Ontario, Canada at 44.17 latitude and -77.35 longitude, 88 m (289 ft) above sea level.
The station reports from 1929 to 1959, 31 years of record.
1,464 records set at Belleville Par Lab still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Ontario, Canada, 44.17 latitude, -77.35 longitude.
Elevation: 88 m (289 ft).
Period of record: 1929 to 1959, 31 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 Belleville Par Lab. 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 Belleville Par Lab, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	12.8 C (55.0 F)	-34.4 C (-29.9 F)	n/a	n/a
Feb	13.3 C (55.9 F)	-37.2 C (-35.0 F)	n/a	n/a
Mar	23.3 C (73.9 F)	-30.0 C (-22.0 F)	n/a	n/a
Apr	28.9 C (84.0 F)	-13.9 C (7.0 F)	n/a	n/a
May	29.4 C (84.9 F)	-3.3 C (26.1 F)	n/a	n/a
Jun	35.0 C (95.0 F)	1.1 C (34.0 F)	n/a	n/a
Jul	40.6 C (105.1 F)	4.4 C (39.9 F)	n/a	n/a
Aug	36.1 C (97.0 F)	2.8 C (37.0 F)	n/a	n/a
Sep	35.0 C (95.0 F)	-1.7 C (28.9 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-12.2 C (10.0 F)	n/a	n/a
Nov	23.9 C (75.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Dec	14.4 C (57.9 F)	-33.9 C (-29.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Belleville Par Lab still stand. 1933 holds the most, with 81.

Standing records at Belleville Par Lab by the year they were set
Year set	Standing records
1929	32
1930	55
1931	67
1932	62
1933	81
1934	74
1935	64
1936	78
1937	31
1938	57
1939	52
1940	51
1941	32
1942	42
1943	51
1944	47
1945	71
1946	63
1947	54
1948	45
1949	48
1950	51
1951	38
1952	23
1953	38
1954	43
1955	4
1956	46
1957	20
1958	27
1959	17

Wettest Day of Each Month

Aug: 103.6 mm (4.1 in)

The wettest day on record for each calendar month at Belleville Par Lab. The most was 103.6 mm (4.1 in) on 31 August 1941.

Record daily precipitation for each month at Belleville Par Lab
Month	Record daily precipitation (mm)	Date
Jan	39.6 mm (1.6 in)	14 January 1940
Feb	35.6 mm (1.4 in)	7 February 1942
Mar	43.2 mm (1.7 in)	2 March 1947
Apr	45.7 mm (1.8 in)	28 April 1959
May	41.9 mm (1.6 in)	30 May 1956
Jun	63.5 mm (2.5 in)	24 June 1950
Jul	81.0 mm (3.2 in)	14 July 1945
Aug	103.6 mm (4.1 in)	31 August 1941
Sep	52.6 mm (2.1 in)	21 September 1938
Oct	53.3 mm (2.1 in)	15 October 1943
Nov	54.9 mm (2.2 in)	10 November 1932
Dec	40.6 mm (1.6 in)	8 December 1937

Period of Record Coverage

1929 to 1959

31 years of record at Belleville Par Lab, 1929 to 1959. 5 years have data for under 90 percent of days and are left out of rankings: 1929, 1955, 1956, 1957, 1959.

Days with data per year at Belleville Par Lab
Year	Days with data	Share of year	Complete
1929	152	42%	No
1930	359	98%	Yes
1931	362	99%	Yes
1932	365	100%	Yes
1933	363	99%	Yes
1934	365	100%	Yes
1935	360	99%	Yes
1936	359	98%	Yes
1937	355	97%	Yes
1938	362	99%	Yes
1939	360	99%	Yes
1940	358	98%	Yes
1941	364	100%	Yes
1942	363	99%	Yes
1943	363	99%	Yes
1944	366	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	365	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	363	99%	Yes
1955	79	22%	No
1956	318	87%	No
1957	185	51%	No
1958	365	100%	Yes
1959	181	50%	No

Latest Records

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

Climate Trend

26 complete years, 1930 to 1958

One stripe for each of 26 complete years at Belleville Par Lab, 1930 to 1958. Blue stripes are years cooler than the station's own mean of 7.7 C (45.8 F); red stripes are warmer. The coolest year was 1934, at 6.6 C (43.8 F), and the warmest was 1953, at 8.9 C (48.1 F). The strongest colour marks a difference of 1.3 C (2.3 F).

Annual mean temperature at Belleville Par Lab as warming stripes, 1930 to 1958
Year	Annual mean temperature	Difference from the station mean
1930	7.7 C	+0.02 C
1931	8.8 C	+1.15 C
1932	8.2 C	+0.51 C
1933	7.8 C	+0.14 C
1934	6.6 C	-1.09 C
1935	6.7 C	-0.95 C
1936	7.1 C	-0.58 C
1937	8.3 C	+0.64 C
1938	8.2 C	+0.55 C
1939	7.4 C	-0.27 C
1940	6.7 C	-0.97 C
1941	7.9 C	+0.26 C
1942	7.9 C	+0.23 C
1943	7.0 C	-0.70 C
1944	8.0 C	+0.34 C
1945	7.3 C	-0.41 C
1946	7.9 C	+0.19 C
1947	7.4 C	-0.29 C
1948	7.5 C	-0.13 C
1949	8.5 C	+0.88 C
1950	6.6 C	-1.09 C
1951	7.8 C	+0.13 C
1952	8.5 C	+0.81 C
1953	8.9 C	+1.26 C
1954	7.7 C	+0.04 C
1958	7.0 C	-0.64 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

1929 to 1959

Yearly extremes at Belleville Par Lab: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1936	33.9 C (93.0 F)	31
Coldest night (TNn)	-37.2 C (-35.0 F)	1934	-27.8 C (-18.0 F)	31
Wettest day (Rx1day)	103.6 mm (4.1 in)	1941	39.6 mm (1.6 in)	31
Wettest five days (Rx5day)	106.9 mm (4.2 in)	1941	64.4 mm (2.5 in)	31
Longest dry spell (CDD)	27 days	1941	16 days	31

Hottest day (TXx)

The hottest day of the year at Belleville Par Lab, 1929 to 1959. The record is 40.6 C (105.1 F) in 1936, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Belleville Par Lab by year
Year	Hottest day (TXx)
1929	32.8 C (91.0 F)
1930	33.3 C (91.9 F)
1931	37.8 C (100.0 F)
1932	33.9 C (93.0 F)
1933	37.2 C (99.0 F)
1934	33.9 C (93.0 F)
1935	33.9 C (93.0 F)
1936	40.6 C (105.1 F)
1937	34.4 C (93.9 F)
1938	34.4 C (93.9 F)
1939	34.4 C (93.9 F)
1940	32.2 C (90.0 F)
1941	36.1 C (97.0 F)
1942	31.7 C (89.1 F)
1943	32.2 C (90.0 F)
1944	35.0 C (95.0 F)
1945	32.2 C (90.0 F)
1946	33.3 C (91.9 F)
1947	33.9 C (93.0 F)
1948	36.1 C (97.0 F)
1949	34.4 C (93.9 F)
1950	31.7 C (89.1 F)
1951	32.8 C (91.0 F)
1952	33.9 C (93.0 F)
1953	35.0 C (95.0 F)
1954	31.7 C (89.1 F)
1955	13.3 C (55.9 F)
1956	33.9 C (93.0 F)
1957	31.7 C (89.1 F)
1958	30.6 C (87.1 F)
1959	32.8 C (91.0 F)

Coldest night (TNn)

The coldest night of the year at Belleville Par Lab, 1929 to 1959. The record is -37.2 C (-35.0 F) in 1934, marked on the chart; the median year is -27.8 C (-18.0 F).

Coldest night (TNn) at Belleville Par Lab by year
Year	Coldest night (TNn)
1929	-25.6 C (-14.1 F)
1930	-34.4 C (-29.9 F)
1931	-30.0 C (-22.0 F)
1932	-24.4 C (-11.9 F)
1933	-33.9 C (-29.0 F)
1934	-37.2 C (-35.0 F)
1935	-31.1 C (-24.0 F)
1936	-28.3 C (-18.9 F)
1937	-21.7 C (-7.1 F)
1938	-30.0 C (-22.0 F)
1939	-31.1 C (-24.0 F)
1940	-30.0 C (-22.0 F)
1941	-25.0 C (-13.0 F)
1942	-34.4 C (-29.9 F)
1943	-32.8 C (-27.0 F)
1944	-27.8 C (-18.0 F)
1945	-33.9 C (-29.0 F)
1946	-29.4 C (-20.9 F)
1947	-25.0 C (-13.0 F)
1948	-32.2 C (-26.0 F)
1949	-25.0 C (-13.0 F)
1950	-30.0 C (-22.0 F)
1951	-27.8 C (-18.0 F)
1952	-26.1 C (-15.0 F)
1953	-18.9 C (-2.0 F)
1954	-25.6 C (-14.1 F)
1955	-24.4 C (-11.9 F)
1956	-22.2 C (-8.0 F)
1957	-17.8 C (0.0 F)
1958	-25.0 C (-13.0 F)
1959	-25.0 C (-13.0 F)

Wettest day (Rx1day)

The wettest day of the year at Belleville Par Lab, 1929 to 1959. The record is 103.6 mm (4.1 in) in 1941, marked on the chart; the median year is 39.6 mm (1.6 in).

Wettest day (Rx1day) at Belleville Par Lab by year
Year	Wettest day (Rx1day)
1929	27.9 mm (1.1 in)
1930	30.0 mm (1.2 in)
1931	35.3 mm (1.4 in)
1932	54.9 mm (2.2 in)
1933	38.9 mm (1.5 in)
1934	36.8 mm (1.4 in)
1935	33.5 mm (1.3 in)
1936	41.1 mm (1.6 in)
1937	43.2 mm (1.7 in)
1938	52.6 mm (2.1 in)
1939	30.5 mm (1.2 in)
1940	39.6 mm (1.6 in)
1941	103.6 mm (4.1 in)
1942	35.6 mm (1.4 in)
1943	53.3 mm (2.1 in)
1944	34.5 mm (1.4 in)
1945	81.0 mm (3.2 in)
1946	36.1 mm (1.4 in)
1947	49.5 mm (1.9 in)
1948	35.1 mm (1.4 in)
1949	27.7 mm (1.1 in)
1950	63.5 mm (2.5 in)
1951	54.9 mm (2.2 in)
1952	50.3 mm (2.0 in)
1953	39.9 mm (1.6 in)
1954	36.1 mm (1.4 in)
1955	17.8 mm (0.7 in)
1956	45.5 mm (1.8 in)
1957	44.2 mm (1.7 in)
1958	28.7 mm (1.1 in)
1959	45.7 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Belleville Par Lab, 1929 to 1959. The record is 106.9 mm (4.2 in) in 1941, marked on the chart; the median year is 64.4 mm (2.5 in).

Wettest five days (Rx5day) at Belleville Par Lab by year
Year	Wettest five days (Rx5day)
1929	44.7 mm (1.8 in)
1930	64.8 mm (2.6 in)
1931	45.5 mm (1.8 in)
1932	65.1 mm (2.6 in)
1933	47.3 mm (1.9 in)
1934	46.5 mm (1.8 in)
1935	62.7 mm (2.5 in)
1936	86.2 mm (3.4 in)
1937	76.4 mm (3.0 in)
1938	67.8 mm (2.7 in)
1939	56.2 mm (2.2 in)
1940	77.8 mm (3.1 in)
1941	106.9 mm (4.2 in)
1942	76.0 mm (3.0 in)
1943	71.9 mm (2.8 in)
1944	77.7 mm (3.1 in)
1945	96.0 mm (3.8 in)
1946	50.5 mm (2.0 in)
1947	80.5 mm (3.2 in)
1948	46.2 mm (1.8 in)
1949	53.6 mm (2.1 in)
1950	64.0 mm (2.5 in)
1951	64.4 mm (2.5 in)
1952	59.7 mm (2.4 in)
1953	57.9 mm (2.3 in)
1954	66.1 mm (2.6 in)
1955	31.8 mm (1.3 in)
1956	90.2 mm (3.6 in)
1957	62.8 mm (2.5 in)
1958	63.3 mm (2.5 in)
1959	67.1 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Belleville Par Lab, 1929 to 1959. The record is 27 days in 1941, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Belleville Par Lab by year
Year	Longest dry spell (CDD)
1929	14 days
1930	17 days
1931	17 days
1932	16 days
1933	12 days
1934	15 days
1935	22 days
1936	19 days
1937	13 days
1938	14 days
1939	21 days
1940	16 days
1941	27 days
1942	15 days
1943	19 days
1944	17 days
1945	12 days
1946	16 days
1947	18 days
1948	16 days
1949	14 days
1950	15 days
1951	14 days
1952	18 days
1953	15 days
1954	16 days
1955	11 days
1956	15 days
1957	23 days
1958	21 days
1959	19 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

26 years with a frost

Across 26 years with a frost, the median last spring frost at Belleville Par Lab falls on 7 May and the median first autumn frost on 2 October, which leaves a median of 150 days between them.

Fitted over all years, the growing season changes by -0.4 days per decade at this station.

Frost dates and growing season at Belleville Par Lab
Measure	Median, all years	Earliest period	Recent period (1930 to 1958)	Recent against earliest	Fitted trend
Last spring frost	7 May	n/a	7 May	n/a	-0.3 days per decade
First autumn frost	2 October	n/a	2 October	n/a	-0.7 days per decade
Growing days	150 days	n/a	150 days	n/a	-0.4 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.

Download the Data

Data for Belleville Par Lab standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Belleville Par Lab 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).