Does Rain Affect Bug Spray

This leads to the question “If it’s raining won’t my tick and mosquito spray be washed away, or ineffective?” The answer to this concern is a resounding no. As long as the product has 45 minutes to an hour to set then the rain will NOT affect the efficacy of the treatment for two reasons.

How long after pest control can it rain?

Also, if you got the exterior treated and it rains after, but at least 3 days after the treatment−it is unaffected. This again goes back to the fact that most homes have overhangs and gutters that keep those walls dry. Now, keep in mind that’s assuming light to moderate rain.

Can you do pest control when it's raining?

Rain Can Help Pest Control Efforts Outdoor pesticides are often in granular form, which needs water to become their most effective. When it rains, the water helps carry these granules down into the soil, where they can get to work on the insects lurking in and under your lawn.