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Monthly climate in Fort Sumner, New Mexico, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Fort Sumner features a cold semi-arid climate (BSk).Temperatures typically range between 5 °C (41 °F) and 27 °C (81 °F) through the year, but rarely can drop to -17 °C (1 °F) or can rise to as high as 43 °C (109 °F).The average annual precipitation amounts to about 299 mm (11.8 inches) and receives 45 rainy days on the 1 mm (0.04 inches) threshold annually.Fort Sumner enjoys an average of 3596 hours of sunshine throughout the year, and daylight varies from 9 hours 52 minutes to 14 hours 24 minutes per day.

Monthly average temperatures in Fort Sumner, New Mexico, United States §

The warmest months in Fort Sumner are June, July and August, with daily mean temperatures ranging from 26 to 27 °C (79 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 7 °C (41 - 44 °F) throughout the day. On average each year, Fort Sumner experiences 153 days above 25 °C (77.0 °F) and 62 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Fort Sumner, New Mexico, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 23°C
(73°F)		 29°C
(85°F)		 31°C
(88°F)		 33°C
(92°F)		 38°C
(100°F)		 41°C
(106°F)		 43°C
(109°F)		 40°C
(103°F)		 37°C
(99°F)		 34°C
(93°F)		 29°C
(84°F)		 24°C
(76°F)
Mean maximum 21°C
(69°F)		 24°C
(75°F)		 29°C
(84°F)		 32°C
(90°F)		 35°C
(95°F)		 38°C
(100°F)		 38°C
(101°F)		 37°C
(100°F)		 35°C
(95°F)		 31°C
(88°F)		 26°C
(80°F)		 22°C
(71°F)
Average high 12°C
(54°F)		 15°C
(59°F)		 19°C
(67°F)		 24°C
(75°F)		 29°C
(84°F)		 33°C
(92°F)		 34°C
(93°F)		 33°C
(91°F)		 30°C
(86°F)		 22°C
(73°F)		 18°C
(64°F)		 13°C
(56°F)
Daily mean 5°C
(41°F)		 7°C
(44°F)		 12°C
(53°F)		 16°C
(60°F)		 21°C
(70°F)		 26°C
(79°F)		 27°C
(81°F)		 26°C
(79°F)		 22°C
(73°F)		 15°C
(59°F)		 10°C
(50°F)		 6°C
(43°F)
Average low -2°C
(29°F)		 -0°C
(32°F)		 4°C
(40°F)		 8°C
(46°F)		 13°C
(56°F)		 18°C
(65°F)		 20°C
(69°F)		 19°C
(67°F)		 16°C
(60°F)		 8°C
(47°F)		 3°C
(38°F)		 -0°C
(32°F)
Mean minimum -9°C
(15°F)		 -10°C
(14°F)		 -4°C
(25°F)		 -1°C
(31°F)		 6°C
(42°F)		 13°C
(56°F)		 17°C
(64°F)		 16°C
(62°F)		 10°C
(50°F)		 -2°C
(28°F)		 -4°C
(25°F)		 -8°C
(18°F)
Minimum -13°C
(10°F)		 -17°C
(1°F)		 -9°C
(16°F)		 -2°C
(28°F)		 1°C
(34°F)		 11°C
(52°F)		 16°C
(61°F)		 15°C
(59°F)		 3°C
(38°F)		 -8°C
(18°F)		 -8°C
(19°F)		 -12°C
(11°F)

Compare climate in Fort Sumner with other places

Compare temperature, precipitation, sunshine, UV index in Fort Sumner, New Mexico, United States with other places around the world.

Monthly average precipitation in Fort Sumner, New Mexico, United States §

Fort Sumner usually has the most precipitation in June, August and October, with an average of 6 rainy days and 43 mm (1.7 inches) of precipitation per month.The driest months in Fort Sumner are January, February and December. On average, 10 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Fort Sumner, New Mexico, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 11 (0.4) 10 (0.4) 30 (1.2) 17 (0.7) 27 (1.1) 35 (1.4) 22 (0.9) 43 (1.7) 31 (1.2) 52 (2.0) 13 (0.5) 8 (0.3)
Average precipitation days (≥ 1 mm) 2 2 3 2 4 6 6 8 4 5 2 1

Monthly sunshine hours in Fort Sumner, New Mexico, United States §

The sunniest months in Fort Sumner are May, June and July, when the sun shines an average of 11 hours 48 minutes a day.Least sunny months in Fort Sumner: January, February and November receive an average of 7 hours 49 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Fort Sumner, New Mexico, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 202 245 292 320 357 357 372 344 303 284 255 260
Mean daily daylight hours 10h 7m 10h 56m 11h 59m 13h 4m 13h 58m 14h 24m 14h 10m 13h 22m 12h 20m 11h 16m 10h 20m 9h 52m

Solar UV radiation in Fort Sumner, New Mexico, United States §

Fort Sumner experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 12 - 13, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Fort Sumner UV Index data.

Average daily maximum UV levels by month for Fort Sumner, New Mexico, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 4 7 9 11 12 13 12 12 10 8 6 4