Hi,
I have Acura RDX 2015 model. Since I moved from Seattle to Kansas City, based on different temperature (which swings from 20 to near 100), I keep seeing different alert for tire pressure. My daily commute is around 50 miles.
Please see these two pictures in this link, which were taken just couple of days away - Imgur: The magic of the Internet
What TP should I keep ideally which would be okay for cold as well as hot weather?
Please advice.
Thanks
Just use what it says on the door jamb sticker.
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System should show you which tire it has issue with. Is 1 tire low? I think some systems also do not like pressures that are too high.
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Depend on weather/temperature system keep changing the alert. Sometime it would be just one tire, sometime 4 and someone no TP alert at all 
33 front, 35 rear is where you should start when the tire is cold. Don’t worry so much about daily temp changes, just seasonal. Your pressures are way low. Check your manual.
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Tester
This site’s spec for Acura 2015 RDX concurs:
On the same day?
If the morning temperature is 20 F; set the tire pressure while at 20 F.
If the morning temperature during the summer is 70 F; set the pressure while the tires are 70 F.
The tire pressures shown on your dash indicates that you have not added air to the tires since last summer. You must add air from time to time; you cannot select one pressure and “set-it-and-forget-it”.
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No surprise there in the difference in tire pressure, there is a difference of 30° between the two readings and you can reasonably expect about 1-PSI increase/decrease with every 10-degrees difference in temperature… And I’m not blowing Hot Air… 
If you are using the same size stock tires as recommended for your vehicle, the tag on the Door Jam will be your best source for information. Get yourself a good quality tire pressure gauge and set it to the specs on the door jam.
As has already been noted, temperature matters… Your tire pressure will also go up after your 50-mile commute… The manufacturer establishes the recommended tire pressure based on the "Standard Day – 59°…).
When you adjust the tire pressure, for every 10-degrees above 59°, reduce the pressure by one-pound, for every 10-degrees below 59°, add one extra pound…
But for all intents and purposes, unless you are at the extremes of your local temperature range (20° to 100°), just fill the tires to the recommended pressure