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Built 2026-10-19 (19 October 2026)

Oyama Threshold Days by Year (CA001125907)

12 fixed thresholds counted per year at Oyama (CA001125907): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Oyama Thresholds

  • Oyama: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1983 with 15.
  • Oyama: days with 10 cm (3.9 in) or more of snowfall in 15 years, most in 1971 with 6.
  • Oyama: days with a maximum temperature at or above 30 C (86 F) in 8 years, most in 1979 with 32.
  • Oyama: days with a maximum temperature at or below 0 C (32 F) in 8 years, most in 1977 with 57.
  • 12 fixed thresholds have at least one qualifying day at Oyama.
8 years with a qualifying day
Days at or above 30 C (86 F) per year at Oyama Days per year at Oyama with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 1979. 0102030401976: 41977: 311978: 281979: 321980: 91981: 211982: 161983: 1719761977197819791980198119821983
Days per year at Oyama with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 1979.
Days at or above 30 C (86 F) per year at Oyama
YearDaysDecade average
1976423.8
19773123.8
19782823.8
19793223.8
1980915.8
19812115.8
19821615.8
19831715.8
First to last qualifying date each year at Oyama For each year, a bar from the first to the last day at Oyama meeting 30 C (86 F). 1976: 16 July 1976 to 25 July 19761977: 6 June 1977 to 21 August 19771978: 3 June 1978 to 9 August 19781979: 2 June 1979 to 15 September 19791980: 8 July 1980 to 10 August 19801981: 4 July 1981 to 25 August 19811982: 11 June 1982 to 7 August 19821983: 28 May 1983 to 19 August 198319761977197819791980198119821983JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Oyama meeting 30 C (86 F).
First to last qualifying date each year at Oyama
YearFirst dateLast date
19761976-07-161976-07-25
19771977-06-061977-08-21
19781978-06-031978-08-09
19791979-06-021979-09-15
19801980-07-081980-08-10
19811981-07-041981-08-25
19821982-06-111982-08-07
19831983-05-281983-08-19

Every Fixed Threshold

Fixed thresholds at Oyama
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days832197917
35 C (95 F): Days6619811
90 F (32.2 C): Days71619774
100 F (37.8 C): Days1319793
0 C (32 F): Ice days (max857197735
0 C (32 F): Frost days (min81591982124
-10 C (14 F): Days with min834197913
-20 C (-4 F): Days with min51019794
10 mm (0.39 in): Days with 10 mm or more rain1815198315
25 mm (0.98 in): Days with 25 mm or more rain6219711
10 cm (3.9 in): Days with 10 cm or more snowfall15619712
25 cm (9.8 in): Days with 25 cm or more snowfall3119671

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1976.

Download the Data

  • Data for Oyama 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).