Blythwood Threshold Days by Year

3 fixed thresholds counted per year at Blythwood (ASN00009686): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Blythwood Thresholds

Blythwood: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1926 with 53.
Blythwood: days with 25 mm (0.98 in) or more of precipitation in 35 years, most in 1939 with 16.
Blythwood: days with 50 mm (1.97 in) or more of precipitation in 20 years, most in 1934 with 3.
3 fixed thresholds have at least one qualifying day at Blythwood.

Days with 10 mm (0.39 in) or more of precipitation

35 years with a qualifying day

Days per year at Blythwood with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 53 in 1926.

Days with 10 mm (0.39 in) or more of precipitation per year at Blythwood
Year	Days	Decade average
1907	31	31
1908	29	31
1909	33	31
1910	47	32.5
1911	21	32.5
1912	26	32.5
1913	32	32.5
1914	16	32.5
1915	38	32.5
1916	27	32.5
1917	51	32.5
1918	42	32.5
1919	25	32.5
1920	38	33.8
1921	37	33.8
1922	27	33.8
1923	36	33.8
1924	32	33.8
1925	25	33.8
1926	53	33.8
1927	31	33.8
1928	33	33.8
1929	26	33.8
1930	36	32.6
1931	32	32.6
1932	33	32.6
1933	36	32.6
1934	29	32.6
1935	34	32.6
1936	26	32.6
1937	36	32.6
1938	24	32.6
1939	40	32.6
1940	13	28.5
1941	44	28.5

For each year, a bar from the first to the last day at Blythwood meeting 10 mm (0.39 in).

First to last qualifying date each year at Blythwood
Year	First date	Last date
1907	1907-04-27	1907-10-17
1908	1908-04-05	1908-11-25
1909	1909-03-27	1909-10-22
1910	1910-01-04	1910-11-21
1911	1911-04-26	1911-09-12
1912	1912-05-05	1912-11-13
1913	1913-03-16	1913-12-07
1914	1914-04-08	1914-12-13
1915	1915-02-26	1915-10-21
1916	1916-01-04	1916-11-23
1917	1917-02-10	1917-12-20
1918	1918-02-15	1918-10-28
1919	1919-01-17	1919-11-03
1920	1920-03-29	1920-10-10
1921	1921-02-19	1921-11-04
1922	1922-04-27	1922-12-06
1923	1923-01-20	1923-10-08
1924	1924-05-12	1924-11-10
1925	1925-01-16	1925-10-11
1926	1926-03-11	1926-11-19
1927	1927-03-13	1927-10-25
1928	1928-04-20	1928-11-02
1929	1929-04-10	1929-11-08
1930	1930-04-15	1930-10-18
1931	1931-03-05	1931-12-26
1932	1932-04-06	1932-10-29
1933	1933-04-09	1933-10-16
1934	1934-03-09	1934-11-04
1935	1935-02-25	1935-12-01
1936	1936-05-09	1936-12-19
1937	1937-02-11	1937-10-22
1938	1938-03-16	1938-11-02
1939	1939-04-10	1939-11-13
1940	1940-05-18	1940-10-21
1941	1941-03-31	1941-11-17

Every Fixed Threshold

Fixed thresholds at Blythwood
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	35	53	1926	44
25 mm (0.98 in): Days with 25 mm or more rain	35	16	1939	11
50 mm (1.97 in): Days with 50 mm or more rain	20	3	1934	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

Data for Blythwood 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

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

Blythwood Threshold Days by Year

Key Facts for Blythwood Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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