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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Dulan Threshold Days by Year (CHM00052836)

9 fixed thresholds counted per year at Dulan (CHM00052836): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dulan Thresholds

  • Dulan: days with a maximum temperature at or below 0 C (32 F) in 63 years, most in 1977 with 91.
  • Dulan: nights with a minimum temperature at or below 0 C (32 F) in 62 years, most in 1957 with 226.
  • Dulan: nights with a minimum temperature at or below -10 C (14 F) in 62 years, most in 1962 with 121.
  • Dulan: days with 10 mm (0.39 in) or more of precipitation in 61 years, most in 2002 with 11.
  • 9 fixed thresholds have at least one qualifying day at Dulan.
18 years with a qualifying day
Days at or above 30 C (86 F) per year at Dulan Days per year at Dulan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 7 in 2000. 024681961: 21973: 11978: 11981: 21985: 11986: 11988: 11991: 11993: 11995: 11997: 31999: 42000: 72001: 42004: 12010: 32021: 22025: 2196119781985198819931997200020042021
Days per year at Dulan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 7 in 2000.
Days at or above 30 C (86 F) per year at Dulan
YearDaysDecade average
196122
197311
197811
198121.3
198511.3
198611.3
198811.3
199112
199312
199512
199732
199942
200074
200144
200414
201033
202122
202522
First to last qualifying date each year at Dulan For each year, a bar from the first to the last day at Dulan meeting 30 C (86 F). 1961: 11 June 1961 to 20 July 19611973: 6 July 1973 to 6 July 19731978: 21 August 1978 to 21 August 19781981: 2 August 1981 to 3 August 19811985: 3 August 1985 to 3 August 19851986: 9 August 1986 to 9 August 19861988: 24 July 1988 to 24 July 19881991: 15 July 1991 to 15 July 19911993: 26 July 1993 to 26 July 19931995: 4 September 1995 to 4 September 19951997: 22 July 1997 to 28 August 19971999: 31 July 1999 to 3 August 19992000: 17 July 2000 to 26 July 20002001: 4 July 2001 to 31 July 20012004: 4 August 2004 to 4 August 20042010: 29 July 2010 to 31 July 20102021: 22 July 2021 to 23 July 20212025: 15 July 2025 to 16 July 2025196119811988199520002010JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Dulan meeting 30 C (86 F).
First to last qualifying date each year at Dulan
YearFirst dateLast date
19611961-06-111961-07-20
19731973-07-061973-07-06
19781978-08-211978-08-21
19811981-08-021981-08-03
19851985-08-031985-08-03
19861986-08-091986-08-09
19881988-07-241988-07-24
19911991-07-151991-07-15
19931993-07-261993-07-26
19951995-09-041995-09-04
19971997-07-221997-08-28
19991999-07-311999-08-03
20002000-07-172000-07-26
20012001-07-042001-07-31
20042004-08-042004-08-04
20102010-07-292010-07-31
20212021-07-222021-07-23
20252025-07-152025-07-16

Every Fixed Threshold

Fixed thresholds at Dulan
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days18720002
90 F (32.2 C): Days1119991
0 C (32 F): Ice days (max6391197730
0 C (32 F): Frost days (min622261957119
-10 C (14 F): Days with min62121196267
-20 C (-4 F): Days with min542719566
10 mm (0.39 in): Days with 10 mm or more rain611120027
25 mm (0.98 in): Days with 25 mm or more rain13220092
50 mm (1.97 in): Days with 50 mm or more rain1120211

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.

Download the Data

  • Data for Dulan 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).