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Built 2026-10-19 (19 October 2026)

Jena Threshold Days by Year (USC00164696)

16 fixed thresholds counted per year at Jena (USC00164696): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Jena Thresholds

  • Jena: days with 10 mm (0.39 in) or more of precipitation in 34 years, most in 1992 with 52.
  • Jena: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 2009 with 28.
  • Jena: days with 50 mm (1.97 in) or more of precipitation in 34 years, most in 2012 with 12.
  • Jena: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1998 with 139.
  • 16 fixed thresholds have at least one qualifying day at Jena.
28 years with a qualifying day
Days at or above 30 C (86 F) per year at Jena Days per year at Jena with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 139 in 1998. 0501001501986: 1371987: 1341988: 1141989: 1101990: 1261991: 1121992: 1031993: 1261994: 1181995: 1241996: 1211997: 1181998: 1391999: 1332000: 1372001: 1112003: 1182005: 1232006: 1372007: 1262008: 1082009: 1252012: 1182015: 1182016: 1242017: 952018: 1292019: 1191986198919921995199820012006200920162019
Days per year at Jena with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 139 in 1998.
Days at or above 30 C (86 F) per year at Jena
YearDaysDecade average
1986137123.8
1987134123.8
1988114123.8
1989110123.8
1990126122
1991112122
1992103122
1993126122
1994118122
1995124122
1996121122
1997118122
1998139122
1999133122
2000137123.1
2001111123.1
2003118123.1
2005123123.1
2006137123.1
2007126123.1
2008108123.1
2009125123.1
2012118117.2
2015118117.2
2016124117.2
201795117.2
2018129117.2
2019119117.2
First to last qualifying date each year at Jena For each year, a bar from the first to the last day at Jena meeting 30 C (86 F). 1986: 9 April 1986 to 6 October 19861987: 18 April 1987 to 3 October 19871988: 10 May 1988 to 19 October 19881989: 23 April 1989 to 9 November 19891990: 22 April 1990 to 9 October 19901991: 12 May 1991 to 14 October 19911992: 25 April 1992 to 27 October 19921993: 6 May 1993 to 20 October 19931994: 26 April 1994 to 20 October 19941995: 23 March 1995 to 28 October 19951996: 21 April 1996 to 27 September 19961997: 29 March 1997 to 13 October 19971998: 3 May 1998 to 6 October 19981999: 10 April 1999 to 16 October 19992000: 19 April 2000 to 13 October 20002001: 6 April 2001 to 23 September 20012003: 19 April 2003 to 25 October 20032005: 11 May 2005 to 29 September 20052006: 12 March 2006 to 19 October 20062007: 29 March 2007 to 19 October 20072008: 19 March 2008 to 7 October 20082009: 23 April 2009 to 16 October 20092012: 19 March 2012 to 4 November 20122015: 10 May 2015 to 16 October 20152016: 29 April 2016 to 2 November 20162017: 29 April 2017 to 16 October 20172018: 3 May 2018 to 15 October 20182019: 16 April 2019 to 21 October 20191986199019941998200320082016JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Jena meeting 30 C (86 F).
First to last qualifying date each year at Jena
YearFirst dateLast date
19861986-04-091986-10-06
19871987-04-181987-10-03
19881988-05-101988-10-19
19891989-04-231989-11-09
19901990-04-221990-10-09
19911991-05-121991-10-14
19921992-04-251992-10-27
19931993-05-061993-10-20
19941994-04-261994-10-20
19951995-03-231995-10-28
19961996-04-211996-09-27
19971997-03-291997-10-13
19981998-05-031998-10-06
19991999-04-101999-10-16
20002000-04-192000-10-13
20012001-04-062001-09-23
20032003-04-192003-10-25
20052005-05-112005-09-29
20062006-03-122006-10-19
20072007-03-292007-10-19
20082008-03-192008-10-07
20092009-04-232009-10-16
20122012-03-192012-11-04
20152015-05-102015-10-16
20162016-04-292016-11-02
20172017-04-292017-10-16
20182018-05-032018-10-15
20192019-04-162019-10-21

Every Fixed Threshold

Fixed thresholds at Jena
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days281391998119
35 C (95 F): Days2867199821
40 C (104 F): Days310200010
90 F (32.2 C): Days28112199884
100 F (37.8 C): Days152720002
110 F (43.3 C): Days1120001
0 C (32 F): Ice days (max11919893
0 C (32 F): Frost days (min2758200836
-10 C (14 F): Days with min3619963
20 C (68 F): Tropical nights (min271241991102
25 C (77 F): Days with min101019981
10 mm (0.39 in): Days with 10 mm or more rain3452199246
25 mm (0.98 in): Days with 25 mm or more rain3428200931
50 mm (1.97 in): Days with 50 mm or more rain3412201216
100 mm (3.94 in): Days with 100 mm or more rain22319874
200 mm (7.87 in): Days with 200 mm or more rain3119871

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1986.

Download the Data

  • Data for Jena 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 (2026-10-12).