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Built 2026-10-19 (19 October 2026)

Koepenick Threshold Days by Year (USC00474295)

18 fixed thresholds counted per year at Koepenick (USC00474295): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Koepenick Thresholds

  • Koepenick: days with a maximum temperature at or above 30 C (86 F) in 20 years, most in 1916 with 40.
  • Koepenick: days with a maximum temperature at or below 0 C (32 F) in 20 years, most in 1920 with 102.
  • Koepenick: nights with a minimum temperature at or below 0 C (32 F) in 20 years, most in 1907 with 221.
  • Koepenick: nights with a minimum temperature at or below -10 C (14 F) in 20 years, most in 1904 with 102.
  • 18 fixed thresholds have at least one qualifying day at Koepenick.
20 years with a qualifying day
Days at or above 30 C (86 F) per year at Koepenick Days per year at Koepenick with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1916. 0102030401902: 181903: 171904: 121905: 201906: 291907: 41908: 121909: 71910: 261911: 191912: 111913: 91914: 141915: 31916: 401917: 141918: 251920: 51922: 61923: 41902190419061908191019121914191619181922
Days per year at Koepenick with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1916.
Days at or above 30 C (86 F) per year at Koepenick
YearDaysDecade average
19021814.9
19031714.9
19041214.9
19052014.9
19062914.9
1907414.9
19081214.9
1909714.9
19102617.9
19111917.9
19121117.9
1913917.9
19141417.9
1915317.9
19164017.9
19171417.9
19182517.9
192055
192265
192345
First to last qualifying date each year at Koepenick For each year, a bar from the first to the last day at Koepenick meeting 30 C (86 F). 1902: 19 May 1902 to 31 August 19021903: 3 June 1903 to 27 July 19031904: 3 May 1904 to 30 July 19041905: 14 June 1905 to 9 October 19051906: 17 May 1906 to 11 September 19061907: 14 June 1907 to 18 June 19071908: 21 June 1908 to 21 September 19081909: 27 June 1909 to 7 August 19091910: 17 June 1910 to 22 August 19101911: 26 May 1911 to 16 August 19111912: 25 June 1912 to 10 September 19121913: 15 June 1913 to 1 September 19131914: 8 June 1914 to 9 August 19141915: 11 August 1915 to 4 September 19151916: 1 July 1916 to 30 August 19161917: 7 July 1917 to 31 July 19171918: 19 July 1918 to 18 August 19181920: 10 June 1920 to 24 September 19201922: 23 June 1922 to 6 September 19221923: 20 June 1923 to 10 July 19231902190519081911191419171922JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Koepenick meeting 30 C (86 F).
First to last qualifying date each year at Koepenick
YearFirst dateLast date
19021902-05-191902-08-31
19031903-06-031903-07-27
19041904-05-031904-07-30
19051905-06-141905-10-09
19061906-05-171906-09-11
19071907-06-141907-06-18
19081908-06-211908-09-21
19091909-06-271909-08-07
19101910-06-171910-08-22
19111911-05-261911-08-16
19121912-06-251912-09-10
19131913-06-151913-09-01
19141914-06-081914-08-09
19151915-08-111915-09-04
19161916-07-011916-08-30
19171917-07-071917-07-31
19181918-07-191918-08-18
19201920-06-101920-09-24
19221922-06-231922-09-06
19231923-06-201923-07-10

Every Fixed Threshold

Fixed thresholds at Koepenick
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days204019164
35 C (95 F): Days9719165
90 F (32.2 C): Days162519169
100 F (37.8 C): Days1119161
0 C (32 F): Ice days (max20102192089
0 C (32 F): Frost days (min202211907192
-10 C (14 F): Days with min20102190497
-20 C (-4 F): Days with min2055191730
-30 C (-22 F): Days with min201719124
-40 C (-40 F): Days with min1119121
20 C (68 F): Tropical nights (min13819131
25 C (77 F): Days with min1219172
10 mm (0.39 in): Days with 10 mm or more rain1238190525
25 mm (0.98 in): Days with 25 mm or more rain121119046
50 mm (1.97 in): Days with 50 mm or more rain7319121
100 mm (3.94 in): Days with 100 mm or more rain1119041
10 cm (3.9 in): Days with 10 cm or more snowfall3719237
25 cm (9.8 in): Days with 25 cm or more snowfall1119231

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1902.

Download the Data

  • Data for Koepenick 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).