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Monthly climate in San Luis, Colorado, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification San Luis features a cold semi-arid climate (BSk). Temperatures typically range between -5 °C (23 °F) and 18 °C (65 °F) through the year, but rarely can drop to -26 °C (-14 °F) or can rise to as high as 32 °C (89 °F). The average annual precipitation amounts to about 405 mm (15.9 inches) and receives 86 rainy days on the 1 mm (0.04 inches) threshold annually. San Luis enjoys an average of 3629 hours of sunshine throughout the year, and daylight varies from 9 hours 37 minutes to 14 hours 39 minutes per day.

Monthly average temperatures in San Luis, Colorado, United States §

The warmest months in San Luis are June, July and August, with daily mean temperatures ranging from 16 to 18 °C (62 - 65 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -4 °C (23 - 25 °F) throughout the day. On average each year, San Luis experiences 45 days above 25 °C (77.0 °F) and 167 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in San Luis, 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
(55°F)		 14°C
(58°F)		 17°C
(63°F)		 21°C
(70°F)		 26°C
(79°F)		 31°C
(88°F)		 32°C
(89°F)		 29°C
(84°F)		 29°C
(84°F)		 24°C
(75°F)		 17°C
(63°F)		 14°C
(57°F)
Mean maximum 7°C
(45°F)		 9°C
(49°F)		 15°C
(59°F)		 19°C
(66°F)		 23°C
(73°F)		 28°C
(82°F)		 30°C
(87°F)		 28°C
(82°F)		 28°C
(82°F)		 22°C
(71°F)		 14°C
(58°F)		 10°C
(49°F)
Average high 1°C
(34°F)		 2°C
(36°F)		 7°C
(46°F)		 12°C
(54°F)		 18°C
(64°F)		 24°C
(75°F)		 26°C
(78°F)		 25°C
(77°F)		 22°C
(71°F)		 14°C
(58°F)		 8°C
(47°F)		 3°C
(37°F)
Daily mean -5°C
(23°F)		 -4°C
(25°F)		 1°C
(34°F)		 5°C
(42°F)		 10°C
(51°F)		 16°C
(62°F)		 18°C
(65°F)		 17°C
(63°F)		 14°C
(57°F)		 7°C
(45°F)		 2°C
(35°F)		 -4°C
(25°F)
Average low -11°C
(12°F)		 -10°C
(15°F)		 -5°C
(23°F)		 -2°C
(30°F)		 3°C
(38°F)		 9°C
(48°F)		 11°C
(52°F)		 10°C
(50°F)		 7°C
(45°F)		 0°C
(33°F)		 -4°C
(25°F)		 -10°C
(15°F)
Mean minimum -22°C
(-6°F)		 -22°C
(-8°F)		 -14°C
(7°F)		 -9°C
(16°F)		 -4°C
(25°F)		 2°C
(37°F)		 7°C
(46°F)		 7°C
(45°F)		 0°C
(32°F)		 -11°C
(12°F)		 -13°C
(10°F)		 -20°C
(-4°F)
Minimum -23°C
(-9°F)		 -26°C
(-14°F)		 -17°C
(2°F)		 -10°C
(14°F)		 -8°C
(18°F)		 -0°C
(31°F)		 7°C
(45°F)		 6°C
(43°F)		 -6°C
(21°F)		 -18°C
(-0°F)		 -19°C
(-2°F)		 -24°C
(-11°F)

Compare climate in San Luis with other places

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

Monthly average precipitation in San Luis, Colorado, United States §

San Luis usually has the most precipitation in May, July and August, with an average of 10 rainy days and 52 mm (2.1 inches) of precipitation per month. The driest months in San Luis are January, November and December. On average, 21 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Luis, 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) 25 (1.0) 37 (1.5) 35 (1.4) 42 (1.6) 28 (1.1) 71 (2.8) 45 (1.8) 31 (1.2) 27 (1.1) 17 (0.7) 23 (0.9)
Average precipitation days (≥ 1 mm) 6 7 7 8 8 7 14 8 6 5 4 6

Monthly sunshine hours in San Luis, Colorado, United States §

The sunniest months in San Luis are May, June and July, when the sun shines an average of 11 hours 49 minutes a day. Least sunny months in San Luis: January, February and December receive an average of 7 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Luis, 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 199 250 304 324 358 364 364 347 313 288 263 249
Mean daily daylight hours 9h 55m 10h 49m 11h 59m 13h 10m 14h 10m 14h 39m 14h 23m 13h 30m 12h 22m 11h 10m 10h 9m 9h 37m

Solar UV radiation in San Luis, Colorado, United States §

San Luis experiences the highest level of ultraviolet (UV) radiation in June, July 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 exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly San Luis UV Index data.

Average daily maximum UV levels by month for San Luis, 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 10 11 12 13 13 12 11 8 5 4

Detailed Monthly Weather Insights for San Luis, Colorado, United States

Discover in-depth weather details for every month in San Luis. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about San Luis's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.