Jewett Threshold Days by Year (USC00414591)

17 fixed thresholds counted per year at Jewett (USC00414591): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Jewett Thresholds

Jewett: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 1973 with 48.
Jewett: days with 25 mm (0.98 in) or more of precipitation in 38 years, most in 1905 with 21.
Jewett: days with 50 mm (1.97 in) or more of precipitation in 36 years, most in 1905 with 8.
Jewett: days with a maximum temperature at or above 30 C (86 F) in 18 years, most in 1911 with 166.
17 fixed thresholds have at least one qualifying day at Jewett.

Days at or above 30 C (86 F)

18 years with a qualifying day

Days per year at Jewett with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 166 in 1911.

Days at or above 30 C (86 F) per year at Jewett
Year	Days	Decade average
1904	137	137
1905	129	137
1907	124	137
1909	158	137
1910	164	151.8
1911	166	151.8
1912	143	151.8
1913	143	151.8
1914	143	151.8
1979	125	125
1980	139	125.8
1981	136	125.8
1983	110	125.8
1984	144	125.8
1985	135	125.8
1986	114	125.8
1987	119	125.8
1988	109	125.8

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

First to last qualifying date each year at Jewett
Year	First date	Last date
1904	1904-03-12	1904-10-21
1905	1905-05-07	1905-10-18
1907	1907-03-18	1907-10-07
1909	1909-03-02	1909-11-12
1910	1910-03-20	1910-11-10
1911	1911-01-30	1911-11-10
1912	1912-04-15	1912-10-21
1913	1913-03-30	1913-10-16
1914	1914-04-14	1914-10-24
1979	1979-04-15	1979-10-22
1980	1980-05-06	1980-11-09
1981	1981-04-01	1981-10-17
1983	1983-03-02	1983-12-10
1984	1984-03-27	1984-10-18
1985	1985-04-15	1985-10-14
1986	1986-02-18	1986-10-05
1987	1987-04-16	1987-10-31
1988	1988-04-23	1988-11-09

Every Fixed Threshold

Fixed thresholds at Jewett
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	18	166	1911	109
35 C (95 F): Days	18	117	1911	27
40 C (104 F): Days	9	38	1910	7
45 C (113 F): Days	1	1	1909	1
90 F (32.2 C): Days	18	145	1911	71
100 F (37.8 C): Days	14	68	1910	2
110 F (43.3 C): Days	5	3	1909	1
0 C (32 F): Ice days (max	12	5	1979	3
0 C (32 F): Frost days (min	16	60	1912	28
-10 C (14 F): Days with min	11	6	1912	4
20 C (68 F): Tropical nights (min	16	123	1911	81
25 C (77 F): Days with min	10	8	1911	3
10 mm (0.39 in): Days with 10 mm or more rain	38	48	1973	27
25 mm (0.98 in): Days with 25 mm or more rain	38	21	1905	12
50 mm (1.97 in): Days with 50 mm or more rain	36	8	1905	6
100 mm (3.94 in): Days with 100 mm or more rain	11	2	1949	1
10 cm (3.9 in): Days with 10 cm or more snowfall	3	2	1985	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

Data for Jewett 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Jewett Threshold Days by Year (USC00414591)

Key Facts for Jewett Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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