San Luis, AZ Weather & Climate Normals
What a normal year in San Luis actually looks like
On the 30-year record NOAA keeps for San Luis, AZ, the comfort score comes out to 54/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 6 months a year land in the 55–75°F range this site treats as mild.
How much San Luis's weather actually swings
Average temperatures in San Luis run from 57°F in Dec up to 95°F in Aug, a 37.5°F seasonal swing, a middling gap by national standards.
San Luis, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 70°F | 48°F | 0.39in | 0in |
| Feb | 73°F | 50°F | 0.38in | 0in |
| Mar | 80°F | 55°F | 0.39in | 0in |
| Apr | 86°F | 60°F | 0.14in | 0in |
| May | 94°F | 67°F | 0.06in | 0in |
| Jun | 103°F | 75°F | 0.01in | 0in |
| Jul | 107°F | 83°F | 0.24in | 0in |
| Aug | 106°F | 83°F | 0.2in | 0in |
| Sep | 101°F | 78°F | 0.68in | 0in |
| Oct | 90°F | 66°F | 0.13in | 0in |
| Nov | 78°F | 54°F | 0.23in | 0in |
| Dec | 68°F | 47°F | 0.43in | 0in |
If you're timing a visit, Jan, Feb, Mar, Apr, Nov, and Dec are San Luis's mildest stretch; if you're moving there, you should plan around Aug's heat instead.
How wet San Luis actually gets
Over a typical year, San Luis sees about 3.28in of precipitation a year across roughly 17 days with measurable rain or snow, with 0in of snow a year.
San Luis against the rest of the country
Out of 4876 cities scored here, San Luis comes in at 921; within AZ alone it ranks 4 of 57. Population is about 40,064.
Checking the actual forecast
These figures come from Yuma Mcas, AZ US, the NOAA station 12.9 miles from San Luis, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is