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Weather in San Luis, CO · National Weather Service + NOAA

San Luis has a dry climate

San Luis has cold winters and pleasant summers, with very little rain. A typical July afternoon reaches 81°, a January night drops to 9°. In November, a normal day reaches 49° and a normal night drops to 19°.

Winter 40°/10°Spring 59°/27°Summer 79°/45°Fall 61°/29°
Right now
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Sunrise 8:28 am · sunset 7:02 pm

Getting the latest forecast from the National Weather Service…

What stands out about San Luis’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
A dry climateJust 16 inches of rain and melted snow a year, less than 94% of U.S. towns.
A normal year

Where today sits in San Luis’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
40° / 10°
Snow is rare
Spring
59° / 27°
Last frost around May 31
Summer
79° / 45°
2 days reach 90° in a normal year
Fall now
61° / 29°
First frost around Sep 23
Pastthe usual first frost (Sep 23). Last frost next spring: May 31
Best months to be outside
JunJulAug
Highs of 62–84° and lows of 40° or more
When is it wettest?August, with 2.3 inches.Is it warmer than it used to be?+1.6° vs. the 20th century.What is each month like?Highs, lows, rain and snow for all 12.

Weather talk

Road reports, first frosts and storm memories from neighbors in San Luis.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for San Luis itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at San Luis 1 S, CO (1 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.