When to Paloalto
Climate guide & best times to travel
Best Time to Visit
Month-by-Month Guide
January
January represents the coolest month of the year, though temperatures remain at dangerous levels with highs of 138°F and lows of 109°F. The minimal rainfall of 0.1 inches provides little relief from the arid conditions. Despite being the 'mildest' month, extreme heat precautions are absolutely essential.
February
February sees a slight increase in temperature with highs reaching 139°F and lows of 111°F. The trace amount of rainfall (0.1 inches) does little to mitigate the extreme heat conditions. Outdoor activities remain extremely hazardous during all daylight hours.
March
March marks the beginning of the temperature climb with highs of 141°F and lows of 114°F. The last month with any measurable precipitation (0.1 inches), though still negligible. The heat begins to intensify as the region moves toward the completely dry season.
April
April begins the completely dry season with zero rainfall and temperatures climbing to 142°F during the day and 117°F at night. The absence of any precipitation combined with increasing heat makes this month particularly challenging. Heat-related health risks become even more severe.
May
May continues the dry season with temperatures reaching 145°F and overnight lows of 122°F. The complete lack of rainfall and increasing heat intensity make outdoor exposure extremely dangerous. The consistent 70% humidity adds to the oppressive conditions.
June
June sees further temperature escalation with highs of 148°F and lows of 126°F, accompanied by zero precipitation. The extreme heat combined with high humidity creates life-threatening conditions. Any outdoor activity during daylight hours poses severe health risks.
July
July brings temperatures to 150°F during the day with nighttime temperatures of 129°F, offering no relief from the heat. The complete absence of rainfall continues the drought conditions. Emergency heat protocols should be in effect at all times.
August
August maintains the extreme heat pattern with temperatures reaching 152°F and lows of 130°F. The dry season continues with zero rainfall, creating desert-like conditions. Heat exhaustion and heat stroke risks are at their highest levels.
September
September represents the peak of the extreme heat with record-breaking temperatures of 154°F and lows of 129°F. No precipitation occurs during this month, making it the most challenging time of year. Outdoor exposure should be completely avoided during daylight hours.
October
October begins a slight cooling trend with temperatures dropping to 152°F during the day and 123°F at night. The dry conditions persist with no rainfall, though the minor temperature decrease provides marginal improvement. Extreme heat precautions remain essential.
November
November shows more significant cooling with highs of 144°F and lows of 114°F, along with the return of minimal precipitation (0.1 inches). While still extremely hot, the temperature reduction and trace moisture provide slight relief from the peak summer conditions.
December
December offers the most moderate conditions of the year with temperatures of 136°F during the day and 108°F at night. The return of minimal rainfall (0.1 inches) marks the end of the dry season. Despite being the 'coolest' month, extreme heat safety measures are still absolutely necessary.