Is low-temperature exterior paint worth it where you live?

What it changes

Standard exterior latex wants the overnight low at 50°F or more. Low-temperature versions, sold under most premium lines, are labelled down to 35°F. Counting the same ten years of weather both ways, the median place gains 52 workable days a year from the switch. 3,075 places (96%) gain 30 or more, a whole extra month of days, and in 3,117 at least one month goes from not good to good. In 53 places it adds fewer than 10, because their limit is heat, rain or dew, not cold nights.

Where it adds the most

Place	Days, standard paint	Days, low-temp paint	Gain
San Jose, CA	199	324	+125
Anaheim, CA	96	216	+121
San Bernardino, CA	124	242	+118
Fremont, CA	161	273	+113
Riverside, CA	103	213	+110
Moreno Valley, CA	53	163	+110

Where it barely matters

Place	Days, standard paint	Days, low-temp paint	Gain
Honolulu, HI	254	254	+0
Miami, FL	149	152	+4
Hialeah, FL	152	157	+5
Pembroke Pines, FL	145	150	+5
Fort Lauderdale, FL	150	156	+7

The gain lives in the shoulder months, spring and autumn, so it is worth most when your job is going to land in one of them. It does not help with rain or dew, and it does not let you paint in frost: the wall still has to be dry and above the label minimum for the hours after you finish. Ask the painter which product they plan to use and what its label minimum is.