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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Rolleston Threshold Days by Year (ASN00035059)

14 fixed thresholds counted per year at Rolleston (ASN00035059): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rolleston Thresholds

  • Rolleston: days with 10 mm (0.39 in) or more of precipitation in 121 years, most in 1956 with 35.
  • Rolleston: days with 25 mm (0.98 in) or more of precipitation in 121 years, most in 1956 with 17.
  • Rolleston: days with 50 mm (1.97 in) or more of precipitation in 98 years, most in 1921 with 7.
  • Rolleston: days with 100 mm (3.94 in) or more of precipitation in 25 years, most in 1950 with 2.
  • 14 fixed thresholds have at least one qualifying day at Rolleston.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Rolleston Days per year at Rolleston with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 217 in 2002. 01002003001988: 1751991: 1831992: 1781993: 1771994: 1511996: 1771997: 1831998: 1651999: 1552000: 1592001: 1762002: 217198819921994199719992001
Days per year at Rolleston with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 217 in 2002.
Days at or above 30 C (86 F) per year at Rolleston
YearDaysDecade average
1988175175
1991183171.1
1992178171.1
1993177171.1
1994151171.1
1996177171.1
1997183171.1
1998165171.1
1999155171.1
2000159184
2001176184
2002217184
First to last qualifying date each year at Rolleston For each year, a bar from the first to the last day at Rolleston meeting 30 C (86 F). 1988: 1 January 1988 to 31 December 19881991: 1 January 1991 to 31 December 19911992: 1 January 1992 to 31 December 19921993: 1 January 1993 to 31 December 19931994: 1 January 1994 to 31 December 19941996: 1 January 1996 to 31 December 19961997: 1 January 1997 to 31 December 19971998: 1 January 1998 to 29 December 19981999: 3 January 1999 to 31 December 19992000: 1 January 2000 to 31 December 20002001: 1 January 2001 to 31 December 20012002: 1 January 2002 to 31 December 2002198819921994199719992001JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rolleston meeting 30 C (86 F).
First to last qualifying date each year at Rolleston
YearFirst dateLast date
19881988-01-011988-12-31
19911991-01-011991-12-31
19921992-01-011992-12-31
19931993-01-011993-12-31
19941994-01-011994-12-31
19961996-01-011996-12-31
19971997-01-011997-12-31
19981998-01-011998-12-29
19991999-01-031999-12-31
20002000-01-012000-12-31
20012001-01-012001-12-31
20022002-01-012002-12-31

Every Fixed Threshold

Fixed thresholds at Rolleston
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days122172002217
35 C (95 F): Days1299200299
40 C (104 F): Days111519943
90 F (32.2 C): Days121752002175
100 F (37.8 C): Days1227199827
110 F (43.3 C): Days2219941
0 C (32 F): Frost days (min111519945
20 C (68 F): Tropical nights (min1276200276
25 C (77 F): Days with min8419971
10 mm (0.39 in): Days with 10 mm or more rain12135195611
25 mm (0.98 in): Days with 25 mm or more rain1211719562
50 mm (1.97 in): Days with 50 mm or more rain98719211
100 mm (3.94 in): Days with 100 mm or more rain25219501
200 mm (7.87 in): Days with 200 mm or more rain1119711

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1988.

Download the Data

  • Data for Rolleston 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 (2026-10-17).