Daily records
Page built 2026-10-19
Data as of 2025-12-31
Search
Built 2026-10-19 (19 October 2026)

Mott Is Isle Royale Threshold Days by Year (USC00205637)

6 fixed thresholds counted per year at Mott Is Isle Royale (USC00205637): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mott Is Isle Royale Thresholds

  • Mott Is Isle Royale: days with a maximum temperature at or below 0 C (32 F) in 3 years, most in 1941 with 86.
  • Mott Is Isle Royale: nights with a minimum temperature at or below 0 C (32 F) in 3 years, most in 1941 with 183.
  • Mott Is Isle Royale: nights with a minimum temperature at or below -10 C (14 F) in 3 years, most in 1943 with 79.
  • Mott Is Isle Royale: nights with a minimum temperature at or below -20 C (-4 F) in 3 years, most in 1943 with 28.
  • 6 fixed thresholds have at least one qualifying day at Mott Is Isle Royale.
3 years with a qualifying day
Nights at or below 0 C (32 F) per year at Mott Is Isle Royale Days per year at Mott Is Isle Royale with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 183 in 1941. 0501001502001941: 1831942: 1741943: 172194119421943
Days per year at Mott Is Isle Royale with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 183 in 1941.
Nights at or below 0 C (32 F) per year at Mott Is Isle Royale
YearDaysDecade average
1941183176.3
1942174176.3
1943172176.3
First to last qualifying date each year at Mott Is Isle Royale For each year, a bar from the first to the last day at Mott Is Isle Royale meeting 0 C (32 F). 1941: 1 January 1941 to 31 December 19411942: 1 January 1942 to 31 December 19421943: 1 January 1943 to 16 December 1943194119421943JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mott Is Isle Royale meeting 0 C (32 F).
First to last qualifying date each year at Mott Is Isle Royale
YearFirst dateLast date
19411941-01-011941-12-31
19421942-01-011942-12-31
19431943-01-011943-12-16

Every Fixed Threshold

Fixed thresholds at Mott Is Isle Royale
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1119411
0 C (32 F): Ice days (max386194185
0 C (32 F): Frost days (min31831941172
-10 C (14 F): Days with min379194379
-20 C (-4 F): Days with min328194328
-30 C (-22 F): Days with min2319433

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1941.

Download the Data

  • Data for Mott Is Isle Royale 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).