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Built 2026-10-19 (19 October 2026)

Gridley Threshold Days by Year (USC00043639)

13 fixed thresholds counted per year at Gridley (USC00043639): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Gridley Thresholds

  • Gridley: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 1909 with 28.
  • Gridley: days with 25 mm (0.98 in) or more of precipitation in 21 years, most in 1909 with 11.
  • Gridley: days with a maximum temperature at or above 30 C (86 F) in 12 years, most in 1917 with 130.
  • Gridley: days with a maximum temperature at or above 35 C (95 F) in 12 years, most in 1917 with 76.
  • 13 fixed thresholds have at least one qualifying day at Gridley.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Gridley Days per year at Gridley with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 130 in 1917. 0501001501917: 1301944: 1111945: 1181946: 1211947: 1161948: 921949: 1211950: 1151951: 1281952: 1271953: 901954: 109191719451947194919511953
Days per year at Gridley with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 130 in 1917.
Days at or above 30 C (86 F) per year at Gridley
YearDaysDecade average
1917130130
1944111113.2
1945118113.2
1946121113.2
1947116113.2
194892113.2
1949121113.2
1950115113.8
1951128113.8
1952127113.8
195390113.8
1954109113.8
First to last qualifying date each year at Gridley For each year, a bar from the first to the last day at Gridley meeting 30 C (86 F). 1917: 5 May 1917 to 26 October 19171944: 2 May 1944 to 26 October 19441945: 17 April 1945 to 14 October 19451946: 22 April 1946 to 24 October 19461947: 12 April 1947 to 4 October 19471948: 23 May 1948 to 17 October 19481949: 11 April 1949 to 31 October 19491950: 17 April 1950 to 13 October 19501951: 8 April 1951 to 14 October 19511952: 5 April 1952 to 21 October 19521953: 21 April 1953 to 9 October 19531954: 15 April 1954 to 16 October 1954191719451947194919511953JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Gridley meeting 30 C (86 F).
First to last qualifying date each year at Gridley
YearFirst dateLast date
19171917-05-051917-10-26
19441944-05-021944-10-26
19451945-04-171945-10-14
19461946-04-221946-10-24
19471947-04-121947-10-04
19481948-05-231948-10-17
19491949-04-111949-10-31
19501950-04-171950-10-13
19511951-04-081951-10-14
19521952-04-051952-10-21
19531953-04-211953-10-09
19541954-04-151954-10-16

Every Fixed Threshold

Fixed thresholds at Gridley
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days121301917109
35 C (95 F): Days1276191732
40 C (104 F): Days122019174
45 C (113 F): Days1119521
90 F (32.2 C): Days12107195181
100 F (37.8 C): Days1239191714
110 F (43.3 C): Days2319501
0 C (32 F): Frost days (min1058194920
20 C (68 F): Tropical nights (min91019507
25 C (77 F): Days with min1119171
10 mm (0.39 in): Days with 10 mm or more rain2128190917
25 mm (0.98 in): Days with 25 mm or more rain211119093
50 mm (1.97 in): Days with 50 mm or more rain7219111

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

Download the Data

  • Data for Gridley 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 (2025-12-31).