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Monthly climate in Williams, Arizona, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Williams features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 2 °C (36 °F) and 24 °C (75 °F) through the year, but rarely can drop to -18 °C (-1 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 441 mm (17.4 inches) and receives 63 rainy days on the 1 mm (0.04 inches) threshold annually.Williams enjoys an average of 3579 hours of sunshine throughout the year, and daylight varies from 9 hours 48 minutes to 14 hours 28 minutes per day.

Monthly average temperatures in Williams, Arizona, United States §

The warmest months in Williams are June, July and August, with daily mean temperatures ranging from 23 to 24 °C (73 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 3 °C (36 - 37 °F) throughout the day. On average each year, Williams experiences 105 days above 25 °C (77.0 °F) and 93 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Williams, 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 17°C
(62°F)		 19°C
(66°F)		 23°C
(74°F)		 28°C
(83°F)		 32°C
(91°F)		 37°C
(98°F)		 38°C
(101°F)		 37°C
(99°F)		 36°C
(97°F)		 30°C
(86°F)		 24°C
(76°F)		 19°C
(67°F)
Mean maximum 14°C
(57°F)		 16°C
(61°F)		 20°C
(69°F)		 25°C
(78°F)		 29°C
(84°F)		 33°C
(92°F)		 36°C
(96°F)		 34°C
(94°F)		 33°C
(92°F)		 26°C
(79°F)		 21°C
(71°F)		 16°C
(62°F)
Average high 8°C
(47°F)		 9°C
(49°F)		 12°C
(55°F)		 19°C
(66°F)		 23°C
(73°F)		 30°C
(86°F)		 30°C
(87°F)		 30°C
(86°F)		 27°C
(81°F)		 20°C
(69°F)		 15°C
(60°F)		 9°C
(49°F)
Daily mean 2°C
(36°F)		 3°C
(37°F)		 6°C
(43°F)		 12°C
(54°F)		 16°C
(61°F)		 23°C
(73°F)		 24°C
(75°F)		 23°C
(74°F)		 20°C
(68°F)		 13°C
(56°F)		 8°C
(46°F)		 3°C
(37°F)
Average low -3°C
(27°F)		 -3°C
(27°F)		 -0°C
(32°F)		 4°C
(40°F)		 8°C
(47°F)		 14°C
(58°F)		 17°C
(63°F)		 16°C
(62°F)		 13°C
(55°F)		 6°C
(43°F)		 1°C
(35°F)		 -2°C
(28°F)
Mean minimum -12°C
(10°F)		 -12°C
(10°F)		 -9°C
(16°F)		 -2°C
(28°F)		 1°C
(34°F)		 7°C
(46°F)		 13°C
(56°F)		 13°C
(56°F)		 6°C
(43°F)		 -2°C
(29°F)		 -7°C
(20°F)		 -11°C
(12°F)
Minimum -17°C
(2°F)		 -18°C
(-1°F)		 -11°C
(13°F)		 -5°C
(23°F)		 -0°C
(32°F)		 6°C
(42°F)		 11°C
(52°F)		 12°C
(54°F)		 1°C
(35°F)		 -6°C
(22°F)		 -15°C
(5°F)		 -18°C
(0°F)

Compare climate in Williams with other places

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

Monthly average precipitation in Williams, Arizona, United States §

Williams usually has the most precipitation in February, March and July, with an average of 8 rainy days and 62 mm (2.4 inches) of precipitation per month.The driest months in Williams are April, June and September. On average, 15 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Williams, 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) 50 (2.0) 54 (2.1) 61 (2.4) 20 (0.8) 23 (0.9) 5 (0.2) 71 (2.8) 37 (1.4) 21 (0.8) 28 (1.1) 32 (1.3) 40 (1.6)
Average precipitation days (≥ 1 mm) 6 6 8 3 4 1 11 8 4 4 3 5

Monthly sunshine hours in Williams, Arizona, United States §

The sunniest months in Williams are May, June and July, when the sun shines an average of 12 hours 0 minutes a day.Least sunny months in Williams: January, February and December receive an average of 7 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Williams, 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 179 236 292 328 370 374 360 346 315 293 254 227
Mean daily daylight hours 10h 4m 10h 54m 11h 59m 13h 6m 14h 1m 14h 28m 14h 13m 13h 24m 12h 20m 11h 14m 10h 17m 9h 48m

Solar UV radiation in Williams, Arizona, United States §

Williams experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 12 - 12, 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 Williams UV Index data.

Average daily maximum UV levels by month for Williams, 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) 4 8 9 11 12 12 12 11 10 8 6 4