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Monthly climate in Summit, Arizona, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Summit features a cold semi-arid climate (BSk).Temperatures typically range between 11 °C (52 °F) and 30 °C (87 °F) through the year, but rarely can drop to -3 °C (26 °F) or can rise to as high as 43 °C (110 °F).The average annual precipitation amounts to about 243 mm (9.5 inches) and receives 40 rainy days on the 1 mm (0.04 inches) threshold annually.Summit enjoys an average of 3624 hours of sunshine throughout the year, and daylight varies from 10 hours 5 minutes to 14 hours 11 minutes per day.

Monthly average temperatures in Summit, Arizona, United States §

The warmest months in Summit are June, July and August, with daily mean temperatures ranging from 30 to 30 °C (86 - 87 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 11 to 12 °C (52 - 55 °F) throughout the day. On average each year, Summit experiences 205 days above 25 °C (77.0 °F) and 4 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Summit, Arizona, 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 25°C
(78°F)		 29°C
(85°F)		 33°C
(91°F)		 37°C
(98°F)		 39°C
(103°F)		 43°C
(110°F)		 43°C
(109°F)		 41°C
(107°F)		 41°C
(105°F)		 37°C
(99°F)		 33°C
(91°F)		 27°C
(80°F)
Mean maximum 24°C
(76°F)		 26°C
(79°F)		 30°C
(87°F)		 35°C
(95°F)		 37°C
(99°F)		 40°C
(105°F)		 41°C
(106°F)		 40°C
(104°F)		 39°C
(102°F)		 34°C
(94°F)		 30°C
(86°F)		 25°C
(77°F)
Average high 18°C
(65°F)		 19°C
(67°F)		 23°C
(74°F)		 28°C
(83°F)		 32°C
(90°F)		 37°C
(99°F)		 36°C
(97°F)		 36°C
(97°F)		 34°C
(93°F)		 29°C
(85°F)		 25°C
(76°F)		 18°C
(65°F)
Daily mean 11°C
(52°F)		 12°C
(55°F)		 16°C
(61°F)		 21°C
(70°F)		 25°C
(77°F)		 30°C
(87°F)		 30°C
(87°F)		 30°C
(86°F)		 28°C
(82°F)		 22°C
(72°F)		 17°C
(63°F)		 12°C
(53°F)
Average low 5°C
(42°F)		 6°C
(43°F)		 9°C
(49°F)		 13°C
(56°F)		 16°C
(62°F)		 22°C
(72°F)		 25°C
(77°F)		 24°C
(76°F)		 22°C
(71°F)		 15°C
(60°F)		 11°C
(51°F)		 6°C
(43°F)
Mean minimum -1°C
(30°F)		 -1°C
(31°F)		 3°C
(38°F)		 7°C
(45°F)		 11°C
(52°F)		 17°C
(63°F)		 20°C
(69°F)		 21°C
(70°F)		 16°C
(62°F)		 8°C
(47°F)		 5°C
(42°F)		 -1°C
(31°F)
Minimum -2°C
(28°F)		 -3°C
(26°F)		 2°C
(35°F)		 5°C
(41°F)		 8°C
(47°F)		 16°C
(61°F)		 20°C
(68°F)		 20°C
(69°F)		 12°C
(55°F)		 2°C
(36°F)		 2°C
(36°F)		 -2°C
(29°F)

Compare climate in Summit with other places

Compare temperature, precipitation, sunshine, UV index in Summit, Arizona, United States with other places around the world.

Monthly average precipitation in Summit, Arizona, United States §

Summit usually has the most precipitation in July, August and September, with an average of 7 rainy days and 41 mm (1.6 inches) of precipitation per month.The driest months in Summit are April, May and June. On average, 4 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Summit, Arizona, 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) 19 (0.7) 29 (1.2) 14 (0.5) 3 (0.1) 3 (0.1) 7 (0.3) 50 (2.0) 42 (1.7) 31 (1.2) 10 (0.4) 13 (0.5) 23 (0.9)
Average precipitation days (≥ 1 mm) 3 4 3 0 0 1 11 8 3 2 2 3

Monthly sunshine hours in Summit, Arizona, United States §

The sunniest months in Summit are May, June and July, when the sun shines an average of 11 hours 52 minutes a day.Least sunny months in Summit: January, February and December receive an average of 7 hours 33 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Summit, Arizona, 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 204 242 302 332 370 369 351 335 310 301 261 241
Mean daily daylight hours 10h 18m 11h 3m 12h 0m 12h 58m 13h 47m 14h 11m 13h 58m 13h 14m 12h 18m 11h 20m 10h 30m 10h 5m

Solar UV radiation in Summit, Arizona, United States §

Summit 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 Summit UV Index data.

Average daily maximum UV levels by month for Summit, Arizona, 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) 5 7 10 11 12 13 12 12 11 8 6 5