Ruby 4 NW Threshold Days by Year (USC00027326)

15 fixed thresholds counted per year at Ruby 4 NW (USC00027326): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ruby 4 NW Thresholds

Ruby 4 NW: days with 10 mm (0.39 in) or more of precipitation in 31 years, most in 1944 with 27.
Ruby 4 NW: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1931 with 13.
Ruby 4 NW: days with a maximum temperature at or above 30 C (86 F) in 13 years, most in 1897 with 124.
Ruby 4 NW: days with a maximum temperature at or above 35 C (95 F) in 13 years, most in 1942 with 35.
15 fixed thresholds have at least one qualifying day at Ruby 4 NW.

Days at or above 30 C (86 F)

13 years with a qualifying day

Days per year at Ruby 4 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 124 in 1897.

Days at or above 30 C (86 F) per year at Ruby 4 NW
Year	Days	Decade average
1896	108	116
1897	124	116
1898	119	116
1899	113	116
1936	117	105.3
1937	112	105.3
1938	93	105.3
1939	99	105.3
1940	103	110
1941	104	110
1942	121	110
1943	122	110
1944	100	110

For each year, a bar from the first to the last day at Ruby 4 NW meeting 30 C (86 F).

First to last qualifying date each year at Ruby 4 NW
Year	First date	Last date
1896	1896-05-02	1896-10-08
1897	1897-04-17	1897-10-06
1898	1898-04-23	1898-10-14
1899	1899-03-07	1899-12-25
1936	1936-04-12	1936-10-13
1937	1937-04-15	1937-10-24
1938	1938-04-19	1938-10-14
1939	1939-04-21	1939-09-30
1940	1940-05-01	1940-10-21
1941	1941-05-07	1941-10-12
1942	1942-05-08	1942-10-05
1943	1943-04-02	1943-10-26
1944	1944-05-05	1944-10-12

Every Fixed Threshold

Fixed thresholds at Ruby 4 NW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	13	124	1897	100
35 C (95 F): Days	13	35	1942	27
40 C (104 F): Days	1	1	1944	1
90 F (32.2 C): Days	13	82	1942	68
100 F (37.8 C): Days	11	8	1896	4
0 C (32 F): Frost days (min	13	49	1897	35
-10 C (14 F): Days with min	2	2	1898	1
20 C (68 F): Tropical nights (min	13	105	1896	13
25 C (77 F): Days with min	4	8	1896	1
10 mm (0.39 in): Days with 10 mm or more rain	31	27	1944	18
25 mm (0.98 in): Days with 25 mm or more rain	30	13	1931	5
50 mm (1.97 in): Days with 50 mm or more rain	10	2	1941	2
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1941	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	2	1916	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1951	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

Data for Ruby 4 NW 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).

Ruby 4 NW Threshold Days by Year (USC00027326)

Key Facts for Ruby 4 NW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related