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

Port Clarence Threshold Days by Year (USC00507669)

12 fixed thresholds counted per year at Port Clarence (USC00507669): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Port Clarence Thresholds

  • Port Clarence: days with a maximum temperature at or below 0 C (32 F) in 6 years, most in 1976 with 201.
  • Port Clarence: nights with a minimum temperature at or below 0 C (32 F) in 5 years, most in 1975 with 241.
  • Port Clarence: nights with a minimum temperature at or below -10 C (14 F) in 5 years, most in 1975 with 159.
  • Port Clarence: nights with a minimum temperature at or below -20 C (-4 F) in 5 years, most in 1975 with 95.
  • 12 fixed thresholds have at least one qualifying day at Port Clarence.
5 years with a qualifying day
Nights at or below 0 C (32 F) per year at Port Clarence Days per year at Port Clarence with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 241 in 1975. 01002003001975: 2411978: 2211988: 2271989: 2291991: 20719751978198819891991
Days per year at Port Clarence with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 241 in 1975.
Nights at or below 0 C (32 F) per year at Port Clarence
YearDaysDecade average
1975241231
1978221231
1988227228
1989229228
1991207207
First to last qualifying date each year at Port Clarence For each year, a bar from the first to the last day at Port Clarence meeting 0 C (32 F). 1975: 1 January 1975 to 31 December 19751978: 1 January 1978 to 31 December 19781988: 1 January 1988 to 31 December 19881989: 1 January 1989 to 31 December 19891991: 1 January 1991 to 31 December 199119751978198819891991JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Port Clarence meeting 0 C (32 F).
First to last qualifying date each year at Port Clarence
YearFirst dateLast date
19751975-01-011975-12-31
19781978-01-011978-12-31
19881988-01-011988-12-31
19891989-01-011989-12-31
19911991-01-011991-12-31

Every Fixed Threshold

Fixed thresholds at Port Clarence
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
0 C (32 F): Ice days (max62011976160
0 C (32 F): Frost days (min52411975207
-10 C (14 F): Days with min51591975154
-20 C (-4 F): Days with min595197575
-30 C (-22 F): Days with min529197517
-40 C (-40 F): Days with min2419894
10 mm (0.39 in): Days with 10 mm or more rain210198810
25 mm (0.98 in): Days with 25 mm or more rain1219882
50 mm (1.97 in): Days with 50 mm or more rain1219882
100 mm (3.94 in): Days with 100 mm or more rain1119881
10 cm (3.9 in): Days with 10 cm or more snowfall3219762
25 cm (9.8 in): Days with 25 cm or more snowfall2119881

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1975.

Download the Data

  • Data for Port Clarence 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).