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Built 2026-10-17 (17 October 2026)

Willow Grove (Blue Rock Reserv Threshold Days by Year

8 fixed thresholds counted per year at Willow Grove (Blue Rock Reserv (ASN00085283): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Willow Grove (Blue Rock Reserv Thresholds

  • Willow Grove (Blue Rock Reserv: days with 10 mm (0.39 in) or more of precipitation in 8 years, most in 1989 with 27.
  • Willow Grove (Blue Rock Reserv: days with 25 mm (0.98 in) or more of precipitation in 8 years, most in 1990 with 5.
  • Willow Grove (Blue Rock Reserv: days with a maximum temperature at or above 30 C (86 F) in 7 years, most in 1988 with 24.
  • Willow Grove (Blue Rock Reserv: days with a maximum temperature at or above 35 C (95 F) in 7 years, most in 1988 with 9.
  • 8 fixed thresholds have at least one qualifying day at Willow Grove (Blue Rock Reserv.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Willow Grove (Blue Rock Reserv Days per year at Willow Grove (Blue Rock Reserv with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 24 in 1988. 01020301987: 201988: 241989: 221990: 201991: 161992: 81993: 171987198819891990199119921993
Days per year at Willow Grove (Blue Rock Reserv with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 24 in 1988.
Days at or above 30 C (86 F) per year at Willow Grove (Blue Rock Reserv
YearDaysDecade average
19872022
19882422
19892222
19902015.3
19911615.3
1992815.3
19931715.3
First to last qualifying date each year at Willow Grove (Blue Rock Reserv For each year, a bar from the first to the last day at Willow Grove (Blue Rock Reserv meeting 30 C (86 F). 1987: 2 January 1987 to 31 December 19871988: 6 January 1988 to 24 December 19881989: 16 January 1989 to 31 December 19891990: 2 January 1990 to 31 December 19901991: 2 January 1991 to 26 December 19911992: 19 January 1992 to 26 March 19921993: 1 January 1993 to 12 December 19931987198819891990199119921993JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Willow Grove (Blue Rock Reserv meeting 30 C (86 F).
First to last qualifying date each year at Willow Grove (Blue Rock Reserv
YearFirst dateLast date
19871987-01-021987-12-31
19881988-01-061988-12-24
19891989-01-161989-12-31
19901990-01-021990-12-31
19911991-01-021991-12-26
19921992-01-191992-03-26
19931993-01-011993-12-12

Every Fixed Threshold

Fixed thresholds at Willow Grove (Blue Rock Reserv
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days724198817
35 C (95 F): Days7919883
90 F (32.2 C): Days71519886
100 F (37.8 C): Days1219882
0 C (32 F): Frost days (min1219922
20 C (68 F): Tropical nights (min4319933
10 mm (0.39 in): Days with 10 mm or more rain827198927
25 mm (0.98 in): Days with 25 mm or more rain8519903

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1987.

Download the Data

  • Data for Willow Grove (Blue Rock Reserv 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).