Summer in the Alvord Desert has some of the hottest temperatures in the state of Oregon. High pressure sets in over the Pacific Northwest and the jet stream pushes north into Canada. This high pressure means very little precipitation, averaging less than throughout the summer months. Late day heat begins to set in by late June where highs reach between . In July the temperature commonly climbs to between . Night-time lows vary, with overnight temperatures dropping down between throughout much of the basin. In some locations temperatures will only drop to between . August remains hot with highs ranging between and lows between , though dropping towards the end of the month.
