Treelon Threshold Days by Year (CA004038116)

15 fixed thresholds counted per year at Treelon (CA004038116): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Treelon Thresholds

Treelon: days with 10 mm (0.39 in) or more of precipitation in 9 years, most in 1975 with 14.
Treelon: days with 25 mm (0.98 in) or more of precipitation in 9 years, most in 1974 with 5.
Treelon: days with a maximum temperature at or above 30 C (86 F) in 8 years, most in 1973 with 33.
Treelon: days with a maximum temperature at or above 90 F (32.2 C) in 8 years, most in 1973 with 18.
15 fixed thresholds have at least one qualifying day at Treelon.

Days at or above 30 C (86 F)

8 years with a qualifying day

Days per year at Treelon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 33 in 1973.

For each year, a bar from the first to the last day at Treelon meeting 30 C (86 F).

First to last qualifying date each year at Treelon
Year	First date	Last date
1972	1972-05-31	1972-08-29
1973	1973-06-13	1973-08-30
1974	1974-06-13	1974-08-06
1975	1975-07-04	1975-08-28
1976	1976-05-13	1976-09-17
1977	1977-05-10	1977-08-24
1978	1978-07-14	1978-09-04
1979	1979-06-11	1979-09-17

Every Fixed Threshold

Fixed thresholds at Treelon
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	8	33	1973	31
35 C (95 F): Days	7	7	1973	4
90 F (32.2 C): Days	8	18	1973	11
100 F (37.8 C): Days	1	1	1973	1
0 C (32 F): Ice days (max	8	112	1978	86
0 C (32 F): Frost days (min	8	206	1972	199
-10 C (14 F): Days with min	8	111	1975	101
-20 C (-4 F): Days with min	8	53	1979	53
-30 C (-22 F): Days with min	8	16	1972	14
-40 C (-40 F): Days with min	2	2	1977	2
20 C (68 F): Tropical nights (min	1	1	1973	1
10 mm (0.39 in): Days with 10 mm or more rain	9	14	1975	5
25 mm (0.98 in): Days with 25 mm or more rain	9	5	1974	1
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1979	1
10 cm (3.9 in): Days with 10 cm or more snowfall	8	4	1978	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1972.

Download the Data

Data for Treelon 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Treelon Threshold Days by Year (CA004038116)

Key Facts for Treelon Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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