The short answer
Arrow describes its portable camera towers as weatherproof and suitable for harsh outdoor elements, but its public page does not publish verified temperature ratings, wind limits, dust or water-resistance ratings, night-vision specifications, or image performance. Therefore, the safe answer is that nighttime and extreme-weather capability depends on the exact camera, lighting, enclosure, battery, mounting, and installation conditions.
What to know
For Arizona use, evaluate high heat, direct sun, monsoon wind, dust, lightning, flash-flood exposure, and shaded solar panels. Night performance should be tested for the required distance and scene; infrared, low-light sensors, or supplemental illumination can perform differently around reflective surfaces, vehicle headlights, and large open areas. A unit that produces an image is not necessarily producing identification-quality detail.
Ask Arrow for manufacturer specifications, operating-temperature range, environmental rating, wind and anchoring requirements, lightning protection, nighttime sample images, preventive maintenance, and the procedure for weather alerts or outages. Placement should avoid drainage paths and comply with site and equipment requirements. No provider should guarantee uninterrupted operation in every severe-weather condition; the contract should explain limitations, inspections, and fallback response.