May through September
Summer hiking in Yuma, AZ
Midday desert hiking in Yuma summer heat is dangerous. If you hike between May and September, stick to predawn starts on short, flat river routes and finish early.
Summer rules
How to stay safe when Yuma hits 105°F to 115°F
Start before sunrise
Aim to be off trail by 8:00 AM. Midday foothill climbs like Telegraph Pass or Signal Peak are not summer routes.
Choose river and wetland walks
Favor West Wetlands, Betty’s Kitchen, and Colorado River State Historic Park over exposed desert ridges.
Carry more water than the mileage suggests
Pack electrolytes, a wide-brim hat, and sun protection. Heat illness can escalate quickly even on short loops.
Skip remote canyons in peak heat
Save Kofa, Palm Canyon, and Signal Peak for cooler months. In summer, proximity to shade, water, and parking matters more than summit views.
See the full seasonal playbook on our hiking guide, or browse easy trails that work better in heat.