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

Kew Threshold Days by Year (ASN00086060)

13 fixed thresholds counted per year at Kew (ASN00086060): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Kew Thresholds

  • Kew: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1952 with 31.
  • Kew: days with 25 mm (0.98 in) or more of precipitation in 65 years, most in 1942 with 10.
  • Kew: days with 50 mm (1.97 in) or more of precipitation in 27 years, most in 1951 with 3.
  • Kew: days with a maximum temperature at or above 30 C (86 F) in 5 years, most in 1968 with 32.
  • 13 fixed thresholds have at least one qualifying day at Kew.
5 years with a qualifying day
Days at or above 30 C (86 F) per year at Kew Days per year at Kew with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 1968. 0102030401965: 261967: 301968: 321969: 211971: 2619651967196819691971
Days per year at Kew with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 1968.
Days at or above 30 C (86 F) per year at Kew
YearDaysDecade average
19652627.3
19673027.3
19683227.3
19692127.3
19712626
First to last qualifying date each year at Kew For each year, a bar from the first to the last day at Kew meeting 30 C (86 F). 1965: 29 January 1965 to 30 December 19651967: 5 January 1967 to 27 December 19671968: 24 January 1968 to 30 December 19681969: 30 January 1969 to 28 December 19691971: 24 January 1971 to 25 December 197119651967196819691971JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Kew meeting 30 C (86 F).
First to last qualifying date each year at Kew
YearFirst dateLast date
19651965-01-291965-12-30
19671967-01-051967-12-27
19681968-01-241968-12-30
19691969-01-301969-12-28
19711971-01-241971-12-25

Every Fixed Threshold

Fixed thresholds at Kew
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days532196826
35 C (95 F): Days51519684
40 C (104 F): Days1319683
90 F (32.2 C): Days520196813
100 F (37.8 C): Days3719687
110 F (43.3 C): Days1119681
0 C (32 F): Frost days (min3419652
20 C (68 F): Tropical nights (min5719695
25 C (77 F): Days with min1219682
10 mm (0.39 in): Days with 10 mm or more rain6731195216
25 mm (0.98 in): Days with 25 mm or more rain651019424
50 mm (1.97 in): Days with 50 mm or more rain27319511
100 mm (3.94 in): Days with 100 mm or more rain1119631

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.

Download the Data

  • Data for Kew 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).