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Monthly climate in Delta, Colorado, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Delta features a cold semi-arid climate (BSk).Temperatures typically range between -4 °C (25 °F) and 25 °C (77 °F) through the year, but rarely can drop to -25 °C (-13 °F) or can rise to as high as 39 °C (102 °F).The average annual precipitation amounts to about 313 mm (12.3 inches) and receives 66 rainy days on the 1 mm (0.04 inches) threshold annually.Delta enjoys an average of 3549 hours of sunshine throughout the year, and daylight varies from 9 hours 29 minutes to 14 hours 49 minutes per day.

Monthly average temperatures in Delta, Colorado, United States §

The warmest months in Delta are June, July and August, with daily mean temperatures ranging from 22 to 25 °C (71 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (25 - 30 °F) throughout the day. On average each year, Delta experiences 110 days above 25 °C (77.0 °F) and 139 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Delta, Colorado, 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 13°C
(56°F)		 17°C
(63°F)		 23°C
(75°F)		 28°C
(82°F)		 32°C
(90°F)		 38°C
(101°F)		 39°C
(102°F)		 36°C
(98°F)		 36°C
(96°F)		 27°C
(82°F)		 21°C
(70°F)		 16°C
(61°F)
Mean maximum 10°C
(50°F)		 13°C
(55°F)		 20°C
(68°F)		 25°C
(78°F)		 30°C
(86°F)		 33°C
(92°F)		 37°C
(99°F)		 35°C
(96°F)		 34°C
(94°F)		 26°C
(79°F)		 19°C
(66°F)		 12°C
(53°F)
Average high 4°C
(39°F)		 6°C
(43°F)		 12°C
(53°F)		 18°C
(64°F)		 23°C
(74°F)		 30°C
(87°F)		 33°C
(92°F)		 32°C
(90°F)		 27°C
(82°F)		 18°C
(64°F)		 12°C
(54°F)		 5°C
(42°F)
Daily mean -4°C
(25°F)		 -1°C
(30°F)		 4°C
(40°F)		 10°C
(50°F)		 15°C
(60°F)		 22°C
(71°F)		 25°C
(77°F)		 23°C
(74°F)		 19°C
(66°F)		 9°C
(49°F)		 4°C
(39°F)		 -3°C
(28°F)
Average low -11°C
(13°F)		 -7°C
(19°F)		 -2°C
(29°F)		 2°C
(36°F)		 7°C
(44°F)		 12°C
(54°F)		 16°C
(61°F)		 14°C
(58°F)		 10°C
(50°F)		 2°C
(36°F)		 -2°C
(28°F)		 -9°C
(16°F)
Mean minimum -22°C
(-8°F)		 -18°C
(0°F)		 -10°C
(14°F)		 -4°C
(26°F)		 1°C
(33°F)		 5°C
(42°F)		 10°C
(51°F)		 10°C
(51°F)		 2°C
(36°F)		 -8°C
(18°F)		 -10°C
(13°F)		 -19°C
(-1°F)
Minimum -25°C
(-13°F)		 -22°C
(-6°F)		 -14°C
(7°F)		 -6°C
(22°F)		 -3°C
(26°F)		 2°C
(36°F)		 8°C
(47°F)		 9°C
(48°F)		 -1°C
(31°F)		 -16°C
(3°F)		 -19°C
(-1°F)		 -22°C
(-7°F)

Compare climate in Delta with other places

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

Monthly average precipitation in Delta, Colorado, United States §

Delta usually has the most precipitation in February, March and October, with an average of 8 rainy days and 42 mm (1.6 inches) of precipitation per month.The driest months in Delta are June, July and August. On average, 11 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Delta, Colorado, 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) 31 (1.2) 42 (1.7) 47 (1.8) 26 (1.0) 26 (1.0) 11 (0.4) 13 (0.5) 10 (0.4) 20 (0.8) 36 (1.4) 21 (0.8) 31 (1.2)
Average precipitation days (≥ 1 mm) 8 10 9 6 5 2 3 2 3 7 4 7

Monthly sunshine hours in Delta, Colorado, United States §

The sunniest months in Delta are May, June and July, when the sun shines an average of 12 hours 17 minutes a day.Least sunny months in Delta: January, February and December receive an average of 6 hours 45 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Delta, Colorado, 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 173 220 282 316 364 382 383 360 317 282 243 221
Mean daily daylight hours 9h 47m 10h 45m 11h 58m 13h 14m 14h 17m 14h 49m 14h 31m 13h 35m 12h 22m 11h 7m 10h 2m 9h 29m

Solar UV radiation in Delta, Colorado, United States §

Delta experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Delta UV Index data.

Average daily maximum UV levels by month for Delta, Colorado, 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 10 11 12 12 11 10 7 5 3