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Built 2026-10-19 (19 October 2026)

Roswell Threshold Days by Year (USC00297604)

16 fixed thresholds counted per year at Roswell (USC00297604): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Roswell Thresholds

  • Roswell: nights with a minimum temperature at or below 0 C (32 F) in 19 years, most in 1898 with 130.
  • Roswell: nights with a minimum temperature at or below -10 C (14 F) in 19 years, most in 1898 with 27.
  • Roswell: days with 10 mm (0.39 in) or more of precipitation in 19 years, most in 1941 with 26.
  • Roswell: days with a maximum temperature at or above 30 C (86 F) in 18 years, most in 1943 with 156.
  • 16 fixed thresholds have at least one qualifying day at Roswell.
18 years with a qualifying day
Days at or above 30 C (86 F) per year at Roswell Days per year at Roswell with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 156 in 1943. 0501001502001896: 1311897: 1131898: 1001899: 1271900: 1201901: 1281902: 1151919: 1151920: 1201921: 1361922: 1371940: 1121941: 921942: 1121943: 1561944: 1231945: 1181948: 132189618981900190219201922194119431945
Days per year at Roswell with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 156 in 1943.
Days at or above 30 C (86 F) per year at Roswell
YearDaysDecade average
1896131117.8
1897113117.8
1898100117.8
1899127117.8
1900120121
1901128121
1902115121
1919115115
1920120131
1921136131
1922137131
1940112120.7
194192120.7
1942112120.7
1943156120.7
1944123120.7
1945118120.7
1948132120.7
First to last qualifying date each year at Roswell For each year, a bar from the first to the last day at Roswell meeting 30 C (86 F). 1896: 23 March 1896 to 1 October 18961897: 7 April 1897 to 21 November 18971898: 9 April 1898 to 27 October 18981899: 23 March 1899 to 21 October 18991900: 12 March 1900 to 6 October 19001901: 1 March 1901 to 29 October 19011902: 5 April 1902 to 24 October 19021919: 13 April 1919 to 2 October 19191920: 29 April 1920 to 10 October 19201921: 17 March 1921 to 23 October 19211922: 12 April 1922 to 27 October 19221940: 29 February 1940 to 10 October 19401941: 17 April 1941 to 14 October 19411942: 5 April 1942 to 16 November 19421943: 28 March 1943 to 5 November 19431944: 6 April 1944 to 13 October 19441945: 8 April 1945 to 5 November 19451948: 10 April 1948 to 3 November 1948189618991902192119411944JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Roswell meeting 30 C (86 F).
First to last qualifying date each year at Roswell
YearFirst dateLast date
18961896-03-231896-10-01
18971897-04-071897-11-21
18981898-04-091898-10-27
18991899-03-231899-10-21
19001900-03-121900-10-06
19011901-03-011901-10-29
19021902-04-051902-10-24
19191919-04-131919-10-02
19201920-04-291920-10-10
19211921-03-171921-10-23
19221922-04-121922-10-27
19401940-02-291940-10-10
19411941-04-171941-10-14
19421942-04-051942-11-16
19431943-03-281943-11-05
19441944-04-061944-10-13
19451945-04-081945-11-05
19481948-04-101948-11-03

Every Fixed Threshold

Fixed thresholds at Roswell
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days181561943132
35 C (95 F): Days1879194343
40 C (104 F): Days111218963
90 F (32.2 C): Days181311943105
100 F (37.8 C): Days1732192210
110 F (43.3 C): Days1118961
0 C (32 F): Ice days (max12619486
0 C (32 F): Frost days (min191301898129
-10 C (14 F): Days with min1927189826
-20 C (-4 F): Days with min4218992
20 C (68 F): Tropical nights (min172018967
10 mm (0.39 in): Days with 10 mm or more rain192619413
25 mm (0.98 in): Days with 25 mm or more rain181219412
50 mm (1.97 in): Days with 50 mm or more rain10419411
100 mm (3.94 in): Days with 100 mm or more rain2118981
10 cm (3.9 in): Days with 10 cm or more snowfall2219201

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 Roswell 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).