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Monthly climate in Littleton, Colorado, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Littleton features a cold semi-arid climate (BSk).Temperatures typically range between -3 °C (27 °F) and 21 °C (71 °F) through the year, but rarely can drop to -28 °C (-18 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 550 mm (21.7 inches) and receives 93 rainy days on the 1 mm (0.04 inches) threshold annually.Littleton enjoys an average of 3538 hours of sunshine throughout the year, and daylight varies from 9 hours 24 minutes to 14 hours 54 minutes per day.

Monthly average temperatures in Littleton, Colorado, United States §

The warmest months in Littleton are June, July and August, with daily mean temperatures ranging from 19 to 21 °C (66 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to -1 °C (27 - 31 °F) throughout the day. On average each year, Littleton experiences 85 days above 25 °C (77.0 °F) and 154 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Littleton, 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 18°C
(64°F)		 24°C
(75°F)		 24°C
(76°F)		 27°C
(81°F)		 31°C
(87°F)		 35°C
(95°F)		 36°C
(97°F)		 34°C
(94°F)		 35°C
(95°F)		 29°C
(84°F)		 24°C
(75°F)		 21°C
(71°F)
Mean maximum 13°C
(56°F)		 16°C
(61°F)		 20°C
(68°F)		 24°C
(76°F)		 27°C
(82°F)		 30°C
(87°F)		 35°C
(95°F)		 33°C
(91°F)		 34°C
(93°F)		 27°C
(81°F)		 21°C
(70°F)		 16°C
(61°F)
Average high 5°C
(42°F)		 5°C
(41°F)		 10°C
(51°F)		 14°C
(58°F)		 19°C
(66°F)		 26°C
(80°F)		 29°C
(85°F)		 29°C
(84°F)		 26°C
(79°F)		 16°C
(62°F)		 12°C
(53°F)		 7°C
(45°F)
Daily mean -3°C
(27°F)		 -3°C
(27°F)		 2°C
(37°F)		 6°C
(44°F)		 11°C
(53°F)		 19°C
(66°F)		 21°C
(71°F)		 21°C
(69°F)		 17°C
(64°F)		 8°C
(47°F)		 3°C
(38°F)		 -1°C
(31°F)
Average low -9°C
(16°F)		 -10°C
(15°F)		 -4°C
(25°F)		 -1°C
(31°F)		 4°C
(40°F)		 11°C
(51°F)		 14°C
(57°F)		 13°C
(56°F)		 10°C
(50°F)		 1°C
(34°F)		 -3°C
(26°F)		 -7°C
(20°F)
Mean minimum -21°C
(-5°F)		 -22°C
(-8°F)		 -15°C
(5°F)		 -11°C
(12°F)		 -3°C
(26°F)		 5°C
(41°F)		 10°C
(50°F)		 10°C
(51°F)		 3°C
(37°F)		 -12°C
(10°F)		 -11°C
(12°F)		 -17°C
(2°F)
Minimum -24°C
(-11°F)		 -28°C
(-18°F)		 -20°C
(-5°F)		 -18°C
(1°F)		 -8°C
(18°F)		 4°C
(39°F)		 9°C
(48°F)		 8°C
(47°F)		 -2°C
(28°F)		 -19°C
(-3°F)		 -18°C
(-1°F)		 -19°C
(-2°F)

Compare climate in Littleton with other places

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

Monthly average precipitation in Littleton, Colorado, United States §

Littleton usually has the most precipitation in March, May and July, with an average of 11 rainy days and 80 mm (3.1 inches) of precipitation per month.The driest months in Littleton are January, November and December. On average, 20 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Littleton, 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) 23 (0.9) 28 (1.1) 64 (2.5) 57 (2.2) 118 (4.6) 56 (2.2) 57 (2.2) 37 (1.4) 36 (1.4) 38 (1.5) 23 (0.9) 14 (0.6)
Average precipitation days (≥ 1 mm) 4 7 8 10 14 9 11 9 6 7 4 4

Monthly sunshine hours in Littleton, Colorado, United States §

The sunniest months in Littleton are June, July and August, when the sun shines an average of 11 hours 56 minutes a day.Least sunny months in Littleton: January, February and December receive an average of 7 hours 20 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Littleton, 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 186 239 290 309 334 371 375 351 310 276 249 241
Mean daily daylight hours 9h 43m 10h 43m 11h 58m 13h 16m 14h 21m 14h 54m 14h 36m 13h 38m 12h 23m 11h 6m 9h 58m 9h 24m

Solar UV radiation in Littleton, Colorado, United States §

Littleton 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 exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Littleton UV Index data.

Average daily maximum UV levels by month for Littleton, 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 6 9 11 12 12 12 11 10 7 5 4