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

Ronan Threshold Days by Year (CA003065541)

14 fixed thresholds counted per year at Ronan (CA003065541): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ronan Thresholds

  • Ronan: days with 10 mm (0.39 in) or more of precipitation in 14 years, most in 1977 with 20.
  • Ronan: days with 25 mm (0.98 in) or more of precipitation in 13 years, most in 1976 with 4.
  • Ronan: days with 10 cm (3.9 in) or more of snowfall in 12 years, most in 1971 with 6.
  • Ronan: days with a maximum temperature at or below 0 C (32 F) in 11 years, most in 1982 with 116.
  • 14 fixed thresholds have at least one qualifying day at Ronan.
9 years with a qualifying day
Days at or above 30 C (86 F) per year at Ronan Days per year at Ronan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 8 in 1981. 024681973: 11975: 31976: 11977: 11978: 21979: 21981: 81982: 31983: 1197319751976197719781979198119821983
Days per year at Ronan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 8 in 1981.
Days at or above 30 C (86 F) per year at Ronan
YearDaysDecade average
197311.7
197531.7
197611.7
197711.7
197821.7
197921.7
198184
198234
198314
First to last qualifying date each year at Ronan For each year, a bar from the first to the last day at Ronan meeting 30 C (86 F). 1973: 22 June 1973 to 22 June 19731975: 3 July 1975 to 11 July 19751976: 16 July 1976 to 16 July 19761977: 25 April 1977 to 25 April 19771978: 3 June 1978 to 4 June 19781979: 18 July 1979 to 19 July 19791981: 3 July 1981 to 17 September 19811982: 20 June 1982 to 30 July 19821983: 10 August 1983 to 10 August 198319731976197819811983JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ronan meeting 30 C (86 F).
First to last qualifying date each year at Ronan
YearFirst dateLast date
19731973-06-221973-06-22
19751975-07-031975-07-11
19761976-07-161976-07-16
19771977-04-251977-04-25
19781978-06-031978-06-04
19791979-07-181979-07-19
19811981-07-031981-09-17
19821982-06-201982-07-30
19831983-08-101983-08-10

Every Fixed Threshold

Fixed thresholds at Ronan
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days9819811
90 F (32.2 C): Days1119811
0 C (32 F): Ice days (max111161982107
0 C (32 F): Frost days (min112321973231
-10 C (14 F): Days with min111401982114
-20 C (-4 F): Days with min1171198245
-30 C (-22 F): Days with min112419827
-40 C (-40 F): Days with min8519801
10 mm (0.39 in): Days with 10 mm or more rain1420197710
25 mm (0.98 in): Days with 25 mm or more rain13419762
50 mm (1.97 in): Days with 50 mm or more rain4119731
100 mm (3.94 in): Days with 100 mm or more rain1119781
10 cm (3.9 in): Days with 10 cm or more snowfall12619712
25 cm (9.8 in): Days with 25 cm or more snowfall1219792

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1973.

Download the Data

  • Data for Ronan 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).