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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Nampa Threshold Days by Year

14 fixed thresholds counted per year at Nampa (USC00106295): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Nampa Thresholds

  • Nampa: days with a maximum temperature at or above 30 C (86 F) in 11 years, most in 1946 with 97.
  • Nampa: days with a maximum temperature at or above 35 C (95 F) in 11 years, most in 1950 with 45.
  • Nampa: days with a maximum temperature at or above 90 F (32.2 C) in 11 years, most in 1946 with 70.
  • Nampa: days with a maximum temperature at or above 100 F (37.8 C) in 11 years, most in 1942 with 21.
  • 14 fixed thresholds have at least one qualifying day at Nampa.
11 years with a qualifying day
Days at or above 30 C (86 F) per year at Nampa Days per year at Nampa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 97 in 1946. 02550751001894: 641895: 511896: 631897: 751941: 651942: 701943: 781944: 811945: 661946: 971950: 79189418961941194319451950
Days per year at Nampa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 97 in 1946.
Days at or above 30 C (86 F) per year at Nampa
YearDaysDecade average
18946463.3
18955163.3
18966363.3
18977563.3
19416576.2
19427076.2
19437876.2
19448176.2
19456676.2
19469776.2
19507979
First to last qualifying date each year at Nampa For each year, a bar from the first to the last day at Nampa meeting 30 C (86 F). 1894: 30 May 1894 to 24 September 18941895: 4 June 1895 to 29 September 18951896: 13 June 1896 to 1 October 18961897: 26 April 1897 to 30 September 18971941: 11 May 1941 to 18 September 19411942: 20 April 1942 to 7 October 19421943: 17 June 1943 to 5 October 19431944: 13 May 1944 to 12 October 19441945: 2 May 1945 to 15 September 19451946: 24 April 1946 to 30 September 19461950: 13 May 1950 to 13 October 1950189418961941194319451950JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Nampa meeting 30 C (86 F).
First to last qualifying date each year at Nampa
YearFirst dateLast date
18941894-05-301894-09-24
18951895-06-041895-09-29
18961896-06-131896-10-01
18971897-04-261897-09-30
19411941-05-111941-09-18
19421942-04-201942-10-07
19431943-06-171943-10-05
19441944-05-131944-10-12
19451945-05-021945-09-15
19461946-04-241946-09-30
19501950-05-131950-10-13

Every Fixed Threshold

Fixed thresholds at Nampa
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1197194679
35 C (95 F): Days1145195045
40 C (104 F): Days8519421
90 F (32.2 C): Days1170194663
100 F (37.8 C): Days1121194217
110 F (43.3 C): Days1119421
0 C (32 F): Ice days (max1021194211
0 C (32 F): Frost days (min111741895124
-10 C (14 F): Days with min1127189512
-20 C (-4 F): Days with min4519505
20 C (68 F): Tropical nights (min6118941
25 C (77 F): Days with min1118951
10 mm (0.39 in): Days with 10 mm or more rain111018963
25 mm (0.98 in): Days with 25 mm or more rain1118941

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

  • Data for Nampa 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).