Observing the Moon in the daytime can be tricky because the Moon is generally observed when it is less than 1/2 lit when it is closest to the Sun in the sky. This means its brightness can easily be overwhelmed by the brightness of the daytime sky. As you know, the daytime sky brightness varies greatly depending on a huge number of factors that include the presence of water vapor ( clouds), ice crystals ( in high-altitude stratus clouds) and dust and aerosols ( distant volcanic eruptions etc). Some seasons may be better for observing than others since the transparency of the atmosphere is very well correlated with the amount of water vapor it can carry. Hot air can carry a lot of water, so summer months may not be the best times. Cold air carries the least amount of water, so late fall through early spring may be better months when the sky is crystal blue. If you watch your local weather program and do not see any 'fronts' of activity within a few hundred miles, you may stand a good chance of seeing a thin crescent Moon within 45 degrees of the Sun at noon!