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Built 2026-10-19 (19 October 2026)

Irwinton 4 WNW Threshold Days by Year (USC00094594)

16 fixed thresholds counted per year at Irwinton 4 WNW (USC00094594): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Irwinton 4 WNW Thresholds

  • Irwinton 4 WNW: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1975 with 58.
  • Irwinton 4 WNW: days with 25 mm (0.98 in) or more of precipitation in 40 years, most in 1975 with 28.
  • Irwinton 4 WNW: days with 50 mm (1.97 in) or more of precipitation in 38 years, most in 1975 with 7.
  • Irwinton 4 WNW: nights with a minimum temperature at or below 0 C (32 F) in 35 years, most in 1968 with 68.
  • 16 fixed thresholds have at least one qualifying day at Irwinton 4 WNW.
24 years with a qualifying day
Days at or above 30 C (86 F) per year at Irwinton 4 WNW Days per year at Irwinton 4 WNW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 165 in 1977. 0501001502001966: 871967: 1061968: 1361969: 1131970: 1431971: 1251972: 1281974: 1401975: 1341976: 1181977: 1651978: 1301979: 1041980: 1371981: 1351999: 1342000: 1122002: 1342003: 1052004: 1292005: 1122006: 1392007: 1172008: 11519661969197219761979199920032006
Days per year at Irwinton 4 WNW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 165 in 1977.
Days at or above 30 C (86 F) per year at Irwinton 4 WNW
YearDaysDecade average
196687110.5
1967106110.5
1968136110.5
1969113110.5
1970143131.9
1971125131.9
1972128131.9
1974140131.9
1975134131.9
1976118131.9
1977165131.9
1978130131.9
1979104131.9
1980137136
1981135136
1999134134
2000112120.4
2002134120.4
2003105120.4
2004129120.4
2005112120.4
2006139120.4
2007117120.4
2008115120.4
First to last qualifying date each year at Irwinton 4 WNW For each year, a bar from the first to the last day at Irwinton 4 WNW meeting 30 C (86 F). 1966: 1 April 1966 to 26 September 19661967: 12 March 1967 to 8 October 19671968: 21 March 1968 to 4 October 19681969: 2 April 1969 to 14 October 19691970: 19 April 1970 to 15 October 19701971: 18 April 1971 to 6 October 19711972: 13 April 1972 to 9 October 19721974: 4 March 1974 to 22 September 19741975: 23 March 1975 to 17 October 19751976: 4 March 1976 to 29 September 19761977: 15 March 1977 to 2 October 19771978: 23 March 1978 to 2 November 19781979: 21 April 1979 to 21 October 19791980: 23 April 1980 to 12 October 19801981: 1 April 1981 to 7 October 19811999: 3 April 1999 to 18 October 19992000: 20 April 2000 to 29 October 20002002: 18 March 2002 to 14 October 20022003: 1 May 2003 to 6 November 20032004: 20 March 2004 to 5 November 20042005: 15 May 2005 to 20 October 20052006: 3 April 2006 to 20 October 20062007: 25 March 2007 to 24 October 20072008: 27 April 2008 to 16 October 200819661969197219761979199920032006JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Irwinton 4 WNW meeting 30 C (86 F).
First to last qualifying date each year at Irwinton 4 WNW
YearFirst dateLast date
19661966-04-011966-09-26
19671967-03-121967-10-08
19681968-03-211968-10-04
19691969-04-021969-10-14
19701970-04-191970-10-15
19711971-04-181971-10-06
19721972-04-131972-10-09
19741974-03-041974-09-22
19751975-03-231975-10-17
19761976-03-041976-09-29
19771977-03-151977-10-02
19781978-03-231978-11-02
19791979-04-211979-10-21
19801980-04-231980-10-12
19811981-04-011981-10-07
19991999-04-031999-10-18
20002000-04-202000-10-29
20022002-03-182002-10-14
20032003-05-012003-11-06
20042004-03-202004-11-05
20052005-05-152005-10-20
20062006-04-032006-10-20
20072007-03-252007-10-24
20082008-04-272008-10-16

Every Fixed Threshold

Fixed thresholds at Irwinton 4 WNW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days241651977115
35 C (95 F): Days2373198026
40 C (104 F): Days6719801
90 F (32.2 C): Days24123197778
100 F (37.8 C): Days173519803
0 C (32 F): Ice days (max7219771
0 C (32 F): Frost days (min3568196835
-10 C (14 F): Days with min16419702
-20 C (-4 F): Days with min10n/a1
20 C (68 F): Tropical nights (min35102200479
25 C (77 F): Days with min13319813
10 mm (0.39 in): Days with 10 mm or more rain4058197533
25 mm (0.98 in): Days with 25 mm or more rain4028197517
50 mm (1.97 in): Days with 50 mm or more rain38719753
100 mm (3.94 in): Days with 100 mm or more rain8219772
10 cm (3.9 in): Days with 10 cm or more snowfall1119671

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1966.

Download the Data

  • Data for Irwinton 4 WNW 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).