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Data as of 2026-10-16
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Built 2026-10-17 (17 October 2026)

Heywood Forestry Threshold Days by Year

11 fixed thresholds counted per year at Heywood Forestry (ASN00090048): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Heywood Forestry Thresholds

  • Heywood Forestry: days with 10 mm (0.39 in) or more of precipitation in 15 years, most in 1968 with 35.
  • Heywood Forestry: days with a maximum temperature at or above 30 C (86 F) in 12 years, most in 1974 with 29.
  • Heywood Forestry: days with a maximum temperature at or above 35 C (95 F) in 12 years, most in 1968 with 15.
  • Heywood Forestry: days with a maximum temperature at or above 90 F (32.2 C) in 12 years, most in 1968 with 20.
  • 11 fixed thresholds have at least one qualifying day at Heywood Forestry.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Heywood Forestry Days per year at Heywood Forestry with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 29 in 1974. 01020301967: 281968: 251969: 201970: 141971: 241972: 181973: 251974: 291975: 231976: 181977: 171978: 15196719691971197319751977
Days per year at Heywood Forestry with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 29 in 1974.
Days at or above 30 C (86 F) per year at Heywood Forestry
YearDaysDecade average
19672824.3
19682524.3
19692024.3
19701420.3
19712420.3
19721820.3
19732520.3
19742920.3
19752320.3
19761820.3
19771720.3
19781520.3
First to last qualifying date each year at Heywood Forestry For each year, a bar from the first to the last day at Heywood Forestry meeting 30 C (86 F). 1967: 5 January 1967 to 26 December 19671968: 7 January 1968 to 22 December 19681969: 7 January 1969 to 28 December 19691970: 8 January 1970 to 26 December 19701971: 6 January 1971 to 8 December 19711972: 8 January 1972 to 20 December 19721973: 2 January 1973 to 29 December 19731974: 3 January 1974 to 23 December 19741975: 1 January 1975 to 28 December 19751976: 3 January 1976 to 31 December 19761977: 9 January 1977 to 31 December 19771978: 14 January 1978 to 24 December 1978196719691971197319751977JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Heywood Forestry meeting 30 C (86 F).
First to last qualifying date each year at Heywood Forestry
YearFirst dateLast date
19671967-01-051967-12-26
19681968-01-071968-12-22
19691969-01-071969-12-28
19701970-01-081970-12-26
19711971-01-061971-12-08
19721972-01-081972-12-20
19731973-01-021973-12-29
19741974-01-031974-12-23
19751975-01-011975-12-28
19761976-01-031976-12-31
19771977-01-091977-12-31
19781978-01-141978-12-24

Every Fixed Threshold

Fixed thresholds at Heywood Forestry
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1229197415
35 C (95 F): Days121519683
40 C (104 F): Days5219731
90 F (32.2 C): Days122019688
100 F (37.8 C): Days11519711
0 C (32 F): Frost days (min123119674
20 C (68 F): Tropical nights (min5719741
25 C (77 F): Days with min1119741
10 mm (0.39 in): Days with 10 mm or more rain1535196816
25 mm (0.98 in): Days with 25 mm or more rain121019716
50 mm (1.97 in): Days with 50 mm or more rain5119711

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1967.

Download the Data

  • Data for Heywood Forestry 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-16).