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Built 2026-10-19 (19 October 2026)

Brandywine Threshold Days by Year (USC00461091)

15 fixed thresholds counted per year at Brandywine (USC00461091): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Brandywine Thresholds

  • Brandywine: nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 1941 with 167.
  • Brandywine: nights with a minimum temperature at or below -10 C (14 F) in 29 years, most in 1945 with 44.
  • Brandywine: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1934 with 80.
  • Brandywine: days with a maximum temperature at or above 90 F (32.2 C) in 28 years, most in 1932 with 48.
  • 15 fixed thresholds have at least one qualifying day at Brandywine.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Brandywine Days per year at Brandywine with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 80 in 1934. 0204060801917: 351918: 271919: 511920: 261921: 621922: 491923: 631924: 291925: 641926: 491927: 271928: 431929: 611930: 641931: 481932: 781933: 691934: 801935: 391936: 591938: 541940: 401941: 741942: 631943: 511944: 561945: 681946: 501917192019231926192919321935194019431946
Days per year at Brandywine with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 80 in 1934.
Days at or above 30 C (86 F) per year at Brandywine
YearDaysDecade average
19173537.7
19182737.7
19195137.7
19202647.3
19216247.3
19224947.3
19236347.3
19242947.3
19256447.3
19264947.3
19272747.3
19284347.3
19296147.3
19306461.4
19314861.4
19327861.4
19336961.4
19348061.4
19353961.4
19365961.4
19385461.4
19404057.4
19417457.4
19426357.4
19435157.4
19445657.4
19456857.4
19465057.4
First to last qualifying date each year at Brandywine For each year, a bar from the first to the last day at Brandywine meeting 30 C (86 F). 1917: 19 May 1917 to 29 August 19171918: 26 May 1918 to 26 August 19181919: 30 May 1919 to 11 October 19191920: 10 June 1920 to 16 August 19201921: 24 April 1921 to 22 September 19211922: 7 June 1922 to 7 October 19221923: 29 May 1923 to 26 September 19231924: 20 June 1924 to 31 August 19241925: 23 April 1925 to 20 September 19251926: 2 May 1926 to 24 September 19261927: 29 June 1927 to 1 October 19271928: 4 May 1928 to 14 October 19281929: 24 March 1929 to 29 September 19291930: 12 April 1930 to 26 September 19301931: 28 May 1931 to 23 September 19311932: 6 May 1932 to 19 September 19321933: 20 May 1933 to 1 October 19331934: 5 May 1934 to 26 September 19341935: 14 June 1935 to 21 September 19351936: 8 May 1936 to 23 September 19361938: 27 April 1938 to 19 October 19381940: 6 May 1940 to 21 September 19401941: 19 April 1941 to 7 October 19411942: 5 April 1942 to 19 September 19421943: 6 May 1943 to 6 September 19431944: 4 May 1944 to 4 September 19441945: 15 May 1945 to 29 September 19451946: 22 April 1946 to 27 September 19461917192119251929193319381943JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Brandywine meeting 30 C (86 F).
First to last qualifying date each year at Brandywine
YearFirst dateLast date
19171917-05-191917-08-29
19181918-05-261918-08-26
19191919-05-301919-10-11
19201920-06-101920-08-16
19211921-04-241921-09-22
19221922-06-071922-10-07
19231923-05-291923-09-26
19241924-06-201924-08-31
19251925-04-231925-09-20
19261926-05-021926-09-24
19271927-06-291927-10-01
19281928-05-041928-10-14
19291929-03-241929-09-29
19301930-04-121930-09-26
19311931-05-281931-09-23
19321932-05-061932-09-19
19331933-05-201933-10-01
19341934-05-051934-09-26
19351935-06-141935-09-21
19361936-05-081936-09-23
19381938-04-271938-10-19
19401940-05-061940-09-21
19411941-04-191941-10-07
19421942-04-051942-09-19
19431943-05-061943-09-06
19441944-05-041944-09-04
19451945-05-151945-09-29
19461946-04-221946-09-27

Every Fixed Threshold

Fixed thresholds at Brandywine
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2880193450
35 C (95 F): Days221619342
90 F (32.2 C): Days2848193216
100 F (37.8 C): Days4319303
0 C (32 F): Ice days (max283519264
0 C (32 F): Frost days (min291671941158
-10 C (14 F): Days with min2944194542
-20 C (-4 F): Days with min21819173
-30 C (-22 F): Days with min1119171
20 C (68 F): Tropical nights (min12419301
10 mm (0.39 in): Days with 10 mm or more rain2840191844
25 mm (0.98 in): Days with 25 mm or more rain281119187
50 mm (1.97 in): Days with 50 mm or more rain11419291
10 cm (3.9 in): Days with 10 cm or more snowfall12619253
25 cm (9.8 in): Days with 25 cm or more snowfall1119241

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

Download the Data

  • Data for Brandywine 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). Threshold counts are computed by this site.

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