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San Luis, AZ Weather Forecast for 5-Days

Updated: Mon May 18th 2026 2:45 AM MST

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San Luis, AZ Weather – 5-18 – Sunny
91° / 63°
Sunny
It will be sunny in San Luis, with a high of 91°F and a low of 63°F. Wind will be moderate, blowing around 19mph on average and gusts of 22.9mph at 3 AM. The air will be relatively dry with average humidity levels below 30%, the maximum being 48% at 4 AM and 8% being its lowest at 3 PM. Barometric pressure is its highest of 29.8inHg at 9 AM, a lowest point of 29.67inHg at 3 AM with an avg 29.75inHg.
San Luis, AZ Weather – 5-19 – Sunny
90° / 66°

Weather Tomorrow

Sunny
In San Luis, sunshine is likely with a high near 90°F and a low around 66°F. Wind will be moderate, blowing around 13mph on average and gusts of 22.3mph at 2 AM. Humidity levels should be comfortable, sitting around 38% on average, the maximum being 60% at 6 AM and 20% being its lowest at 2 PM. Barometric pressure is its highest of 29.89inHg at 8 AM, a lowest point of 29.78inHg at 6 PM with an avg 29.83inHg.
San Luis, AZ Weather – 5-20 – Sunny
93° / 69°
Sunny
Highs will reach 93°F with lows near 69°F in San Luis, where sunshine is. Wind will be moderate, blowing around 14mph on average and gusts of 25.8mph at 9 PM. Humidity levels should be comfortable, sitting around 32% on average, the maximum being 52% at 5 AM and 17% being its lowest at 4 PM. Barometric pressure is its highest of 29.87inHg at 9 AM, a lowest point of 29.73inHg at 6 PM with an avg 29.8inHg.
San Luis, AZ Weather – 5-21 – Sunny
94° / 70°
Sunny
Daytime highs will reach 94°F with lows dropping to 70°F in San Luis, where it will be sunny. Wind will be moderate, blowing around 16mph on average and gusts of 23.8mph at 9 PM. Humidity levels should be comfortable, sitting around 30% on average, the maximum being 47% at 6 AM and 11% being its lowest at 6 PM. Barometric pressure is its highest of 29.81inHg at 8 AM, a lowest point of 29.68inHg at 6 PM with an avg 29.74inHg.
San Luis, AZ Weather – 5-22 – Sunny
94° / 67°
Sunny
Daytime highs will reach 94°F with lows dropping to 67°F in San Luis, where it will be sunny. Wind will be moderate, blowing around 16mph on average and gusts of 22.1mph at 8 PM. Humidity levels should be comfortable, sitting around 40% on average, the maximum being 64% at 7 AM and 13% being its lowest at 5 PM. Barometric pressure is its highest of 29.78inHg at 8 AM, a lowest point of 29.69inHg at 5 PM with an avg 29.73inHg.
San Luis, AZ Weather – 5-23 – Sunny
93° / 67°
Sunny
It will be sunny in San Luis, with a high of 93°F and a low of 67°F. Wind will be moderate, blowing around 17mph on average and gusts of 21.6mph at 8 PM. Humidity levels should be comfortable, sitting around 33% on average, the maximum being 55% at 5 AM and 13% being its lowest at 5 PM. Barometric pressure is its highest of 29.86inHg at 8 AM, a lowest point of 29.75inHg at 5 PM with an avg 29.8inHg.

Currently

Clear 68°F
29.65 inHg.
Barometer
44%
Humidity
NW 23.8 mph
Wind
Clear

5 Day Forecast Nearby

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